Initial commit

237 files changed, 27905 insertions, 0 deletions

diff --git a/07-july/Makefile b/07-july/Makefile
new file mode 100644
index 0000000..4619f3c
--- /dev/null
+++ b/07-july/Makefile
@@ -0,0 +1,20 @@
+SRC=$(wildcard src/*.c)\
+	$(wildcard src/math/*.c)\
+	$(wildcard src/graphics/*.c)\
+	$(wildcard src/renderer/*.c)\
+	$(wildcard src/util/*.c)
+OBJ=$(SRC:%.c=%.o)
+TARGET=game
+LDFLAGS=-lSDL2 -lGL -lGLEW -lm -lSDL2_image
+
+%.o : %.c
+	$(CC) -c $< -o $@
+
+$(TARGET) : $(OBJ)
+	$(CC) $(OBJ) -o $(TARGET) $(LDFLAGS)
+
+all : $(TARGET)
+
+.PHONY : clean
+clean:
+	rm -rf $(TARGET) $(OBJ)
diff --git a/07-july/resources/shaders/passShader.frag b/07-july/resources/shaders/passShader.frag
new file mode 100644
index 0000000..4c8dec1
--- /dev/null
+++ b/07-july/resources/shaders/passShader.frag
@@ -0,0 +1,13 @@
+#version 420
+
+in vec4 Fragment_Color;
+in vec2 Fragment_Uv;
+
+out vec4 out_color;
+
+uniform sampler2D Texture;
+
+void main()
+{
+    out_color = Fragment_Color * texture(Texture, Fragment_Uv);
+}
diff --git a/07-july/resources/shaders/passShader.vert b/07-july/resources/shaders/passShader.vert
new file mode 100644
index 0000000..964d13e
--- /dev/null
+++ b/07-july/resources/shaders/passShader.vert
@@ -0,0 +1,15 @@
+#version 420
+
+in layout(location=0) vec2 Model_Position;
+
+uniform mat4 Matrix_totalTransform;
+
+out vec4 Fragment_Color;
+out vec2 Fragment_Uv;
+
+void main()
+{
+    Fragment_Color = vec4(1.0, 1.0, 1.0, 1.0);
+    Fragment_Uv = vec2( (Model_Position.x + 1.0)/2.0, 1.0 - (Model_Position.y + 1.0)/2.0 );
+	gl_Position = Matrix_totalTransform * vec4(Model_Position, 0.0, 1.0);
+}
diff --git a/07-july/resources/shaders/shader.frag b/07-july/resources/shaders/shader.frag
new file mode 100644
index 0000000..406d004
--- /dev/null
+++ b/07-july/resources/shaders/shader.frag
@@ -0,0 +1,53 @@
+#version 420
+
+in vec3 World_Normal;
+in vec2 Fragment_UV;
+in vec4 Fragment_Color;
+in vec3 toLightVector[4];
+in vec3 toEyeVector;
+
+out vec4 out_color;
+
+uniform vec4 lightColor[4];
+uniform vec3 attenuation[4];
+uniform sampler2D Texture;
+
+void main()
+{
+    vec4 totalDiffuse = vec4(0.0, 0.0, 0.0, 1.0);
+    vec4 totalSpecular = vec4(0.0, 0.0, 0.0, 1.0);
+
+    for(int i = 0; i < 4; i++)
+    {
+        /*Light Attenuation*/
+        float dist = length(toLightVector[i]);
+        float attFactor = attenuation[i].x + (attenuation[i].y * dist) + (attenuation[i].z * dist * dist);
+        vec3 unitToLightVector = normalize(toLightVector[i]);
+
+        /*Diffuse lighting*/
+
+        /*La intensidad es el cos entre la normal y el vector hacia la luz*/
+        float brightness = dot(unitToLightVector, normalize(World_Normal));
+        /*No queremos luz negativa ni mayor a 1*/
+        brightness = max(brightness, 0.0);
+        totalDiffuse = totalDiffuse + (brightness * lightColor[i]) / attFactor;
+
+        /* Specular lighting */
+
+        /* Reflejamos el vector hacia la luz (su inverso) en la normal */
+        vec3 Vector_ReflectedLight = reflect(-unitToLightVector, World_Normal);
+
+        /* La luz especular es el cos del angulo entre el vector hacia el ojo y la luz reflectada en la normal */
+        float specularity = clamp( dot(Vector_ReflectedLight, toEyeVector), 0, 1 );
+        float reflectivity = 1;
+        /* Que tan grande es el specular highlight */
+        specularity = pow(specularity, 10);
+        totalSpecular = totalSpecular + clamp( reflectivity * specularity * lightColor[i], 0, 1)  / attFactor;
+    }
+
+    /* Ambient Light */
+    totalDiffuse = max(totalDiffuse, 0.2);
+
+    /* Juntamos todo para el color final*/
+    out_color = totalDiffuse * texture(Texture, Fragment_UV) + totalSpecular;
+}
diff --git a/07-july/resources/shaders/shader.vert b/07-july/resources/shaders/shader.vert
new file mode 100644
index 0000000..b8f10e6
--- /dev/null
+++ b/07-july/resources/shaders/shader.vert
@@ -0,0 +1,38 @@
+#version 420
+
+in layout(location=0) vec3 Model_Position;
+in layout(location=1) vec4 in_color;
+in layout(location=2) vec2 Texture_UV;
+in layout(location=3) vec3 Model_Normal;
+
+uniform mat4 Matrix_totalTransform;
+uniform mat4 Matrix_modelToWorld;
+
+uniform vec3 lightPosition[4];
+uniform vec3 World_eyePosition;
+
+out vec2 Fragment_UV;
+out vec3 World_Normal;
+out vec4 Fragment_Color;
+out vec3 toLightVector[4];
+out vec3 toEyeVector;
+
+void main()
+{
+    vec3 World_Position = vec3(Matrix_modelToWorld * vec4(Model_Position, 1.0));
+
+    for(int i = 0; i < 4; i++)
+    {
+        /* vector que apunta hacia la luz*/
+        toLightVector[i] = lightPosition[i] - World_Position;
+    }
+    /* Vector hacia el ojo*/
+    toEyeVector = normalize(World_eyePosition - World_Position);
+
+	gl_Position = Matrix_totalTransform * vec4(Model_Position, 1.0);
+	/*We add a 0 on the vec4 so we can remove the translation from the matrix
+	(WE DONT WANT THE NORMAL TO BE TRANSLATED)                             */
+	World_Normal = vec3(Matrix_modelToWorld * vec4(Model_Normal, 0.0));
+	Fragment_UV = vec2(Texture_UV.x, 1 - Texture_UV.y); /*Invert y axis*/
+	Fragment_Color = in_color;
+}
diff --git a/07-july/resources/shaders/terrainShader.frag b/07-july/resources/shaders/terrainShader.frag
new file mode 100644
index 0000000..be9c773
--- /dev/null
+++ b/07-july/resources/shaders/terrainShader.frag
@@ -0,0 +1,73 @@
+#version 420
+
+in vec2 Fragment_UV;
+in vec3 World_Normal;
+in vec4 Fragment_Color;
+in vec3 toLightVector[4];
+in vec3 toEyeVector;
+
+out vec4 out_color;
+
+uniform vec4 lightColor[4];
+uniform vec3 attenuation[4];
+uniform vec3 World_eyePosition;
+
+uniform sampler2D Texture_Background;
+uniform sampler2D Texture_R;
+uniform sampler2D Texture_G;
+uniform sampler2D Texture_B;
+uniform sampler2D Texture_BlendMap;
+
+void main()
+{
+    vec4 totalDiffuse = vec4(0.0, 0.0, 0.0, 1.0);
+    vec4 totalSpecular = vec4(0.0, 0.0, 0.0, 1.0);
+
+    for(int i = 0; i < 4; i++)
+    {
+        /*Light Attenuation*/
+        float dist = length(toLightVector[i]);
+        float attFactor = attenuation[i].x + (attenuation[i].y * dist) + (attenuation[i].z * dist * dist);
+        vec3 unitToLightVector = normalize(toLightVector[i]);
+        /*Diffuse lighting*/
+
+        /*La intensidad es el cos entre la normal y el vector hacia la luz*/
+        float brightness = dot(unitToLightVector, normalize(World_Normal));
+        /*No queremos luz negativa ni mayor a 1*/
+        brightness = max(brightness, 0.0);
+        totalDiffuse = totalDiffuse + (brightness * lightColor[i]) / attFactor;
+
+        /* Specular lighting */
+
+        /* Reflejamos el vector hacia la luz (su inverso) en la normal */
+        vec3 Vector_ReflectedLight = reflect(-unitToLightVector, World_Normal);
+
+        /* La luz especular es el cos del angulo entre el vector hacia el ojo y la luz reflectada en la normal */
+        float specularity = clamp( dot(Vector_ReflectedLight, toEyeVector), 0, 1 );
+        float reflectivity = 1;
+        /* Que tan grande es el specular highlight */
+        specularity = pow(specularity, 10);
+        totalSpecular = totalSpecular + clamp( reflectivity * specularity * lightColor[i], 0, 1) / attFactor;
+    }
+
+    /* Ambient Light */
+    totalDiffuse = max(totalDiffuse, 0.2);
+
+    /*Terrain color*/
+    /*The color of the current fragment from the blendmap*/
+    vec4 blendMapColor = texture(Texture_BlendMap, Fragment_UV);
+    /*We want the background color when we have black in the blend map*/
+    float backTextureAmount = 1 - (blendMapColor.r + blendMapColor.g + blendMapColor.b);
+    /*So we dont lose image quality from the tiles textures (Fragment_UV make the terrain look less HD)*/
+    vec2 Tiled_UV = Fragment_UV * 50.0f;
+    /*We get the color of each map tile (soil1, soil2, etc)*/
+    vec4 backgroundTextureColor = texture(Texture_Background, Tiled_UV) * backTextureAmount;
+    vec4 rTextureColor = texture(Texture_R, Tiled_UV) * blendMapColor.r;
+    vec4 gTextureColor = texture(Texture_G, Tiled_UV) * blendMapColor.g;
+    vec4 bTextureColor = texture(Texture_B, Tiled_UV) * blendMapColor.b;
+    /*We mix them corresponding with the blendmap*/
+    vec4 totalColor = backgroundTextureColor + rTextureColor + gTextureColor + bTextureColor;
+
+    /*Our final color for the fragment*/
+    out_color =  totalDiffuse * totalColor + totalSpecular;
+}
diff --git a/07-july/resources/shaders/terrainShader.vert b/07-july/resources/shaders/terrainShader.vert
new file mode 100644
index 0000000..6abdddb
--- /dev/null
+++ b/07-july/resources/shaders/terrainShader.vert
@@ -0,0 +1,37 @@
+#version 420
+
+in layout(location=0) vec3 Model_Position;
+in layout(location=1) vec4 in_color;
+in layout(location=2) vec2 Texture_UV;
+in layout(location=3) vec3 Model_Normal;
+
+uniform mat4 Matrix_totalTransform;
+uniform mat4 Matrix_modelToWorld;
+
+uniform vec3 lightPosition[4];
+uniform vec3 World_eyePosition;
+
+out vec2 Fragment_UV;
+out vec3 World_Normal;
+out vec4 Fragment_Color;
+out vec3 toLightVector[4];
+out vec3 toEyeVector;
+
+void main()
+{
+    vec3 World_Position = vec3(Matrix_modelToWorld * vec4(Model_Position, 1.0));
+
+    for(int i = 0; i < 4; i++)
+    {
+        /* vector que apunta hacia la luz*/
+        toLightVector[i] = lightPosition[i] - World_Position;
+    }
+    /* Vector hacia el ojo*/
+    toEyeVector = normalize(World_eyePosition - World_Position);
+
+	gl_Position = Matrix_totalTransform * vec4(Model_Position, 1.0);
+	/*We add a 0 on the vec4 so we can remove the translation from the matrix
+	(WE DONT WANT THE NORMAL TO BE TRANSLATED)                             */
+	World_Normal = vec3(Matrix_modelToWorld * vec4(Model_Normal, 0.0));
+	Fragment_UV = vec2(Texture_UV.x, 1 - Texture_UV.y); /*Invert y axis*/
+}
diff --git a/07-july/resources/stall.obj b/07-july/resources/stall.obj
new file mode 100644
index 0000000..210f90b
--- /dev/null
+++ b/07-july/resources/stall.obj
@@ -0,0 +1,1696 @@
+# Blender v2.67 (sub 0) OBJ File: 'stall.blend'
+# www.blender.org
+o Cube
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+f 80/385/120 77/390/125 73/391/126
+f 77/390/125 78/387/122 73/391/126
+f 77/390/125 80/385/120 84/392/127
+f 81/393/128 84/392/127 88/394/129
+f 80/385/120 504/384/3 506/395/3
+f 79/388/123 78/387/122 83/396/130
+f 78/387/122 77/390/125 81/393/128
+f 85/397/131 88/394/129 92/398/132
+f 82/399/133 81/393/128 85/397/131
+f 83/396/130 82/399/133 87/400/134
+f 84/392/127 506/395/3 507/401/135
+f 89/402/136 92/398/132 93/403/137
+f 87/400/134 86/404/138 91/405/139
+f 88/394/129 507/401/135 92/398/132
+f 86/404/138 85/397/131 90/406/140
+f 96/407/141 95/408/142 93/403/137
+f 90/406/140 89/402/136 94/409/143
+f 91/405/139 90/406/140 94/409/143
+f 92/398/132 508/410/3 96/407/141
+f 75/411/3 504/384/3 76/386/121
+f 79/388/123 505/412/6 74/389/124
+f 76/386/121 80/385/120 73/391/126
+f 78/387/122 74/389/124 73/391/126
+f 81/393/128 77/390/125 84/392/127
+f 85/397/131 81/393/128 88/394/129
+f 84/392/127 80/385/120 506/395/3
+f 78/387/122 82/399/133 83/396/130
+f 82/399/133 78/387/122 81/393/128
+f 89/402/136 85/397/131 92/398/132
+f 86/404/138 82/399/133 85/397/131
+f 82/399/133 86/404/138 87/400/134
+f 88/394/129 84/392/127 507/401/135
+f 92/398/132 96/407/141 93/403/137
+f 86/404/138 90/406/140 91/405/139
+f 507/401/135 508/410/3 92/398/132
+f 85/397/131 89/402/136 90/406/140
+f 95/408/142 94/409/143 93/403/137
+f 89/402/136 93/403/137 94/409/143
+f 509/413/144 91/405/139 94/409/143
+f 508/410/3 95/408/142 96/407/141
diff --git a/07-july/resources/textures/blendmap.png b/07-july/resources/textures/blendmap.png
new file mode 100644
index 0000000..4789845
--- /dev/null
+++ b/07-july/resources/textures/blendmap.png
diff --git a/07-july/resources/textures/gato.png b/07-july/resources/textures/gato.png
new file mode 100644
index 0000000..fc5c762
--- /dev/null
+++ b/07-july/resources/textures/gato.png
diff --git a/07-july/resources/textures/heightmap.png b/07-july/resources/textures/heightmap.png
new file mode 100644
index 0000000..12741e5
--- /dev/null
+++ b/07-july/resources/textures/heightmap.png
diff --git a/07-july/resources/textures/soil1.png b/07-july/resources/textures/soil1.png
new file mode 100644
index 0000000..227e96c
--- /dev/null
+++ b/07-july/resources/textures/soil1.png
diff --git a/07-july/resources/textures/soil2.png b/07-july/resources/textures/soil2.png
new file mode 100644
index 0000000..5fc40e2
--- /dev/null
+++ b/07-july/resources/textures/soil2.png
diff --git a/07-july/resources/textures/soil3.png b/07-july/resources/textures/soil3.png
new file mode 100644
index 0000000..2c1c431
--- /dev/null
+++ b/07-july/resources/textures/soil3.png
diff --git a/07-july/resources/textures/soil4.png b/07-july/resources/textures/soil4.png
new file mode 100644
index 0000000..8d3a4d3
--- /dev/null
+++ b/07-july/resources/textures/soil4.png
diff --git a/07-july/resources/textures/spaceship.png b/07-july/resources/textures/spaceship.png
new file mode 100644
index 0000000..2263cdc
--- /dev/null
+++ b/07-july/resources/textures/spaceship.png
diff --git a/07-july/resources/textures/stall.png b/07-july/resources/textures/stall.png
new file mode 100644
index 0000000..d4d6f6e
--- /dev/null
+++ b/07-july/resources/textures/stall.png
diff --git a/07-july/src/camera.c b/07-july/src/camera.c
new file mode 100644
index 0000000..9afadf2
--- /dev/null
+++ b/07-july/src/camera.c
@@ -0,0 +1,85 @@
+#include "camera.h"
+
+#include "util/util_time.h"
+
+static const float movementSpeed = 40.0f;
+
+void Camera_Init(camera_t* camera)
+{
+    camera->position = vec3_create(5.0f, 15.0f, 0.0f);
+    camera->viewDirection = vec3_create(-1.0f, 0.0f, 0.0f);
+    camera->needsUpdate = true;
+    camera->up = vec3_create(0.0f, 1.0f, 0.0f);
+}
+
+void Camera_Move_Up(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->up, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_Move_Down(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->up, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_Move_Left(camera_t* camera)
+{
+    vec3_t strafeDirection = vec3_cross_mul(&camera->viewDirection, &camera->up);
+    strafeDirection = vec3_scalar_mul(&strafeDirection, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &strafeDirection);
+}
+
+void Camera_Move_Right(camera_t* camera)
+{
+    vec3_t strafeDirection = vec3_cross_mul(&camera->viewDirection, &camera->up);
+    strafeDirection = vec3_scalar_mul(&strafeDirection, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &strafeDirection);
+}
+
+void Camera_Move_Foward(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->viewDirection, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_Move_Backward(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->viewDirection, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_MouseUpdate(camera_t* camera, const vec2_t* newMousePosition)
+{
+    vec2_t mouseDelta = vec2_sub(newMousePosition, &camera->mousePosition);
+
+    //El if evita que el mouse se teletrasporte al cambiar de posicion muy rapido
+    if(vec2_length(&mouseDelta) > 50.0f){
+        camera->mousePosition = *newMousePosition;
+        return;
+    }
+
+    vec3_t verticalRotation = vec3_cross_mul(&camera->viewDirection, &camera->up);
+
+    mat4_t temp = mat4_rotate(mouseDelta.x * -0.5f, &camera->up);
+
+    camera->viewDirection = mat4_mul_vec3(&temp, &camera->viewDirection);
+
+    temp = mat4_rotate(mouseDelta.y * -0.5f, &verticalRotation);
+    camera->viewDirection = mat4_mul_vec3(&temp, &camera->viewDirection);
+
+    camera->mousePosition = *newMousePosition;
+
+    camera->needsUpdate = true;
+}
+
+mat4_t Camera_GetModelToViewMatrix(camera_t* camera)
+{
+    if(camera->needsUpdate)
+    {
+        vec3_t temp = vec3_add(&camera->position, &camera->viewDirection);
+        camera->viewMatrix = mat4_lookAt(&camera->position, &temp, &camera->up);
+    }
+    return camera->viewMatrix;
+}
diff --git a/07-july/src/camera.h b/07-july/src/camera.h
new file mode 100644
index 0000000..4254045
--- /dev/null
+++ b/07-july/src/camera.h
@@ -0,0 +1,32 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include "math/matrix4x4.h"
+#include "math/vector3f.h"
+#include "math/vector2f.h"
+#include <stdbool.h>
+
+typedef struct
+{
+    vec3_t position;
+    vec3_t viewDirection;
+    vec3_t up;
+    mat4_t projectionMatrix;
+    mat4_t viewMatrix;
+    vec2_t mousePosition;
+    bool needsUpdate;
+} camera_t;
+
+extern void Camera_Init(camera_t* camera);
+extern void Camera_Move_Up(camera_t* camera);
+extern void Camera_Move_Down(camera_t* camera);
+extern void Camera_Move_Left(camera_t* camera);
+extern void Camera_Move_Right(camera_t* camera);
+extern void Camera_Move_Foward(camera_t* camera);
+extern void Camera_Move_Backward(camera_t* camera);
+extern void Camera_MouseUpdate(camera_t* camera, const vec2_t* newMousePosition);
+
+//Consigue la viewMatrix
+extern mat4_t Camera_GetModelToViewMatrix(camera_t* camera);
+
+#endif // CAMERA_H
diff --git a/07-july/src/game.h b/07-july/src/game.h
new file mode 100644
index 0000000..8ba77ed
--- /dev/null
+++ b/07-july/src/game.h
@@ -0,0 +1,42 @@
+#ifndef GAME_H
+#define GAME_H
+
+#include "camera.h"
+#include "graphics/window.h"
+#include "renderer/entity.h"
+#include "player.h"
+#include "terrain.h"
+#include "texture.h"
+#include "renderer/shape.h"
+#include "graphics/shaders.h"
+
+typedef enum
+{
+    MENU,
+    RUNNING,
+    EXIT
+}GameState_t;
+
+#define NUM_ENTITIES 1
+
+#define WINDOW_WIDTH  1024
+#define WINDOW_HEIGHT 768
+#define WINDOW_ASPECT_RATIO ( (float)WINDOW_WIDTH / (float)WINDOW_HEIGHT )
+
+typedef struct
+{
+    GameState_t gameState;
+    Shader_Layout shaderProgram, terrainProgram;
+
+    entity_t ents[NUM_ENTITIES];
+    shape_t *entsShape;
+    texture_t *entsTexture;
+    terrain_t *terrain;
+
+    player_t player;
+
+    camera_t camera;
+    window_t *window;
+} game_t;
+
+#endif // GAME_H
diff --git a/07-july/src/graphics/shaders.c b/07-july/src/graphics/shaders.c
new file mode 100644
index 0000000..ef4ec0a
--- /dev/null
+++ b/07-july/src/graphics/shaders.c
@@ -0,0 +1,134 @@
+#include "shaders.h"
+#include "../util/util.h"
+
+#include <stdlib.h>
+
+static void CompileShader(const char* source, GLuint shaderID)
+{
+    glShaderSource(shaderID, 1, &source, 0);
+    glCompileShader(shaderID);
+    GLint error;
+    glGetShaderiv(shaderID, GL_COMPILE_STATUS, &error);
+    if(error != GL_TRUE)
+    {
+        GLint logLenth;
+        glGetShaderiv(shaderID, GL_INFO_LOG_LENGTH, &logLenth);
+        GLchar buffer[logLenth];
+        glGetShaderInfoLog(shaderID, logLenth, &logLenth, buffer);
+        glDeleteShader(shaderID);
+        Util_FatalError(buffer);
+    }
+}
+
+
+GLuint Shader_CompileShaders(const char* vertexShader, const char* fragmentShader)
+{
+    char* vertexShaderSource = Util_LoadFile(vertexShader);
+    char* fragmentShaderSource = Util_LoadFile(fragmentShader);
+
+    GLuint vs = 0, fs = 0, program;
+    vs = glCreateShader(GL_VERTEX_SHADER);
+    fs = glCreateShader(GL_FRAGMENT_SHADER);
+
+    if(vs == 0 || fs == 0)
+        Util_FatalError("Shaders could not be created\n");
+
+    program = glCreateProgram();
+
+    CompileShader(vertexShaderSource, vs);
+    CompileShader(fragmentShaderSource, fs);
+
+    glAttachShader(program, vs);
+    glAttachShader(program, fs);
+
+    glLinkProgram(program);
+
+    GLint error;
+    glGetProgramiv(program, GL_LINK_STATUS, &error);
+
+    if(error != GL_TRUE)
+    {
+        GLint logLength;
+        glGetProgramiv(program, GL_INFO_LOG_LENGTH, &logLength);
+
+        GLchar buffer[logLength];
+        glGetProgramInfoLog(program, logLength, &logLength, buffer);
+
+        glDeleteProgram(program);
+        glDeleteShader(vs);
+        glDeleteShader(fs);
+
+        Util_FatalError(buffer);
+    }
+
+    glDetachShader(program, vs);
+    glDetachShader(program, fs);
+    glDeleteShader(vs);
+    glDeleteShader(fs);
+
+    free(vertexShaderSource);
+    free(fragmentShaderSource);
+
+    return program;
+}
+
+GLint Shader_GetUniformLocation( GLuint programID, const char* uniformName )
+{
+    GLint u = glGetUniformLocation(programID, uniformName);
+    if(u == GL_INVALID_INDEX)
+        Util_FatalError("Uniform variable could not be found!");
+    else
+        return u;
+
+    return 0;
+}
+
+GLint Shader_GetAttribLocation ( GLuint programID, const char* attributeName )
+{
+    GLint attrLocation = glGetAttribLocation(programID, attributeName);
+    if(attrLocation < 0)
+        Util_FatalError("Attribute could not be found\n");
+    return attrLocation;
+}
+
+void Shader_Destroy(GLuint programID)
+{
+    glUseProgram(0);
+    glDeleteProgram(programID);
+}
+
+void Shader_SetUniformMat4( GLuint programID, const char* name, const float *matrix )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniformMatrix4fv(location, 1, GL_FALSE, matrix);
+}
+
+void Shader_SetUniformFloat( GLuint programID, const char* name, const float val )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform1f(location, val);
+}
+
+void Shader_SetUniformVec2( GLuint programID, const char* name, const float vec[2] )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform2fv(location, 1, vec);
+}
+
+void Shader_SetUniformVec3( GLuint programID, const char* name, const float vec[3] )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform3fv(location, 1, vec);
+}
+
+void Shader_SetUniformVec4( GLuint programID, const char* name, const float vec[4] )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform4fv(location, 1, vec);
+}
+
+void Shader_SetUniformInt( GLuint programID, const char* name, const int val )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform1i(location, val);
+}
diff --git a/07-july/src/graphics/shaders.h b/07-july/src/graphics/shaders.h
new file mode 100644
index 0000000..9e0bbab
--- /dev/null
+++ b/07-july/src/graphics/shaders.h
@@ -0,0 +1,46 @@
+#ifndef SHADERS_H
+#define SHADERS_H
+
+#include <GL/glew.h>
+
+#include "../math/matrix4x4.h"
+
+typedef struct
+{
+    GLuint ID;
+
+    GLint position;
+    GLint color;
+    GLint uv;
+    GLint normal;
+
+    GLint totalTransform;
+    GLint modelToWorld;
+    GLint lightPosition;
+    GLint ambientLight;
+    GLint lightColor;
+    GLint lightAttenuation;
+    GLint World_eyePosition;
+    GLint Texture;
+
+    GLint Texture_Background;
+    GLint Texture_R;
+    GLint Texture_G;
+    GLint Texture_B;
+    GLint Texture_BlendMap;
+
+} Shader_Layout;
+
+extern GLuint Shader_CompileShaders(const char* vertexShader, const char* fragmentShader);
+extern GLint Shader_GetUniformLocation( GLuint programID, const char* uniformName );
+extern GLint Shader_GetAttribLocation ( GLuint programID, const char* attributeName );
+extern void Shader_Destroy(GLuint programID);
+
+extern void Shader_SetUniformMat4( GLuint programID, const char* name, const float *matrix );
+extern void Shader_SetUniformFloat( GLuint programID, const char* name, const float val );
+extern void Shader_SetUniformVec2( GLuint programID, const char* name, const float vec[2] );
+extern void Shader_SetUniformVec3( GLuint programID, const char* name, const float vec[3] );
+extern void Shader_SetUniformVec4( GLuint programID, const char* name, const float vec[4] );
+extern void Shader_SetUniformInt( GLuint programID, const char* name, const int val );
+
+#endif // SHADERS_H
diff --git a/07-july/src/graphics/video.c b/07-july/src/graphics/video.c
new file mode 100644
index 0000000..4b9b084
--- /dev/null
+++ b/07-july/src/graphics/video.c
@@ -0,0 +1,14 @@
+#include "video.h"
+
+#include <SDL2/SDL.h>
+#include <GL/glew.h>
+
+void Video_Init()
+{
+
+}
+
+void Video_Shutdown()
+{
+
+}
diff --git a/07-july/src/graphics/video.h b/07-july/src/graphics/video.h
new file mode 100644
index 0000000..db23a45
--- /dev/null
+++ b/07-july/src/graphics/video.h
@@ -0,0 +1,7 @@
+#ifndef VIDEO_H
+#define VIDEO_H
+
+extern void Video_Init(void);
+extern void Video_Shutdown(void);
+
+#endif // VIDEO_H_INCLUDED
diff --git a/07-july/src/graphics/window.c b/07-july/src/graphics/window.c
new file mode 100644
index 0000000..9afb27a
--- /dev/null
+++ b/07-july/src/graphics/window.c
@@ -0,0 +1,44 @@
+#include "window.h"
+#include "../util/util.h"
+#include <stdlib.h>
+
+window_t* Window_Create(const char* title, Uint32 width, Uint32 height)
+{
+    window_t* window = (window_t*) malloc(sizeof(window_t));
+    window->title = title;
+    window->Width = width;
+    window->Height = height;
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+    window->window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
+                                      width, height, SDL_WINDOW_OPENGL);
+    if(window->window == NULL)
+        Util_FatalError( SDL_GetError() );
+
+    window->context = SDL_GL_CreateContext(window->window);
+
+    if(window->context == NULL)
+        Util_FatalError( SDL_GetError() );
+
+    glViewport(0, 0, width, height);
+    return window;
+}
+
+void Window_Resize(window_t* window, Uint32 width, Uint32 height)
+{
+    window->Width = width;
+    window->Height = height;
+    SDL_SetWindowSize(window->window, width, height);
+    glViewport(0, 0, width, height);
+}
+
+void Window_Update(window_t* window)
+{
+    SDL_GL_SwapWindow(window->window);
+}
+
+void Window_Destroy(window_t* window)
+{
+    SDL_GL_DeleteContext(window->context);
+    SDL_DestroyWindow(window->window);
+    free(window);
+}
diff --git a/07-july/src/graphics/window.h b/07-july/src/graphics/window.h
new file mode 100644
index 0000000..1e71a83
--- /dev/null
+++ b/07-july/src/graphics/window.h
@@ -0,0 +1,20 @@
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <SDL2/SDL.h>
+#include <GL/glew.h>
+
+typedef struct
+{
+    SDL_Window* window;
+    SDL_GLContext context;
+    Uint32 Width, Height;
+    const char* title;
+} window_t;
+
+extern window_t* Window_Create(const char* title, Uint32 width, Uint32 height);
+extern void Window_Resize(window_t* window, Uint32 width, Uint32 height);
+extern void Window_Update(window_t* window);
+extern void Window_Destroy(window_t* window);
+
+#endif // WINDOW_H
diff --git a/07-july/src/gui/gui_renderer.c b/07-july/src/gui/gui_renderer.c
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/07-july/src/gui/gui_renderer.c
diff --git a/07-july/src/gui/gui_renderer.h b/07-july/src/gui/gui_renderer.h
new file mode 100644
index 0000000..2c1b57f
--- /dev/null
+++ b/07-july/src/gui/gui_renderer.h
@@ -0,0 +1,9 @@
+#ifndef GUI_RENDERER_H
+#define GUI_RENDERER_H
+
+extern void gui_renderer_init();
+extern void gui_renderer_submit(widget *widget);
+extern void gui_renderer_quit();
+
+
+#endif // GUI_RENDERER_H
diff --git a/07-july/src/gui/widget.c b/07-july/src/gui/widget.c
new file mode 100644
index 0000000..9ed00f7
--- /dev/null
+++ b/07-july/src/gui/widget.c
@@ -0,0 +1,17 @@
+#include "widget.h"
+#include <stdlib.h>
+
+widget_t *Widget_CreateImage(texture_t *texture, int x, int y, int w, int h)
+{
+    widget_t *widget = (widget_t *) malloc( sizeof(widget_t) );
+    *widget = (widget_t){ x, y, w, h, 0, texture };
+
+    glGenBuffers(1, &widget->vbo);
+    glBindBuffer(GL_ARRAY_BUFFER, widget->vbo);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * 4, NULL, GL_DYNAMIC_DRAW);
+}
+
+void Widget_Destroy(widget_t *widget)
+{
+    free(widget);
+}
diff --git a/07-july/src/gui/widget.h b/07-july/src/gui/widget.h
new file mode 100644
index 0000000..91fc4c4
--- /dev/null
+++ b/07-july/src/gui/widget.h
@@ -0,0 +1,13 @@
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include "GL/glew.h"
+#include "../texture.h"
+
+typedef struct
+{
+    int x, y, w, h;
+    texture_t *texture;
+} widget_t;
+
+#endif // WIDGET_H
diff --git a/07-july/src/input.c b/07-july/src/input.c
new file mode 100644
index 0000000..8384ceb
--- /dev/null
+++ b/07-july/src/input.c
@@ -0,0 +1,21 @@
+#include "input.h"
+
+static bool key_buffer[MAX_KEY_BUFFER_SIZE] = { false };
+
+void Input_PressKey(unsigned int key)
+{
+    if(key > 256 || key < 0) return;
+    key_buffer[key] = true;
+}
+
+void Input_ReleaseKey(unsigned int key)
+{
+    if(key > 256 || key < 0) return;
+    key_buffer[key] = false;
+}
+
+bool Input_isKeyPressed(unsigned int key)
+{
+    if(key > 256 || key < 0) return false;
+    return key_buffer[key];
+}
diff --git a/07-july/src/input.h b/07-july/src/input.h
new file mode 100644
index 0000000..92876ca
--- /dev/null
+++ b/07-july/src/input.h
@@ -0,0 +1,11 @@
+#ifndef INPUT_H
+#define INPUT_H
+
+#include <stdbool.h>
+#define MAX_KEY_BUFFER_SIZE 256
+
+void Input_PressKey(unsigned int key);
+void Input_ReleaseKey(unsigned int key);
+bool Input_isKeyPressed(unsigned int key);
+
+#endif // INPUT_H
diff --git a/07-july/src/light.c b/07-july/src/light.c
new file mode 100644
index 0000000..decd182
--- /dev/null
+++ b/07-july/src/light.c
@@ -0,0 +1 @@
+#include "light.h"
diff --git a/07-july/src/light.h b/07-july/src/light.h
new file mode 100644
index 0000000..6b6da0a
--- /dev/null
+++ b/07-july/src/light.h
@@ -0,0 +1,13 @@
+#ifndef LIGHT_H
+#define LIGHT_H
+
+#include "vertex.h"
+
+typedef struct
+{
+    vec3_t position;
+    color_t color;
+    vec3_t attenuation;
+} light_t;
+
+#endif // LIGHT_H
diff --git a/07-july/src/main.c b/07-july/src/main.c
new file mode 100644
index 0000000..d119764
--- /dev/null
+++ b/07-july/src/main.c
@@ -0,0 +1,227 @@
+#include "game.h"
+#include "math/vector3f.h"
+#include "math/vector2f.h"
+#include "math/matrix4x4.h"
+#include "input.h"
+#include "util/util.h"
+#include "util/util_time.h"
+#include "light.h"
+#include "renderer/renderer.h"
+
+/*
+    TODO:   Shadows
+            Texture Atlases
+
+            improve math package
+            repair gui on renderer.c
+*/
+
+void LoadResources(game_t* game);
+void Draw(game_t* game);
+void ProcessInput(game_t* game);
+void CleanUp(game_t* game);
+
+int main(int args, char* argv[])
+{
+    SDL_Init(SDL_INIT_EVERYTHING);
+
+    game_t game;
+    game.gameState = RUNNING;
+    game.window = Window_Create("Test", WINDOW_WIDTH, WINDOW_HEIGHT);
+
+    if(glewInit() != GLEW_OK)
+        Util_FatalError("Glew could no be started!");
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_CULL_FACE);
+    glCullFace(GL_BACK);
+    SDL_GL_SetSwapInterval(0);
+    //glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+
+    game.shaderProgram.ID = Shader_CompileShaders("resources/shaders/shader.vert",
+                                                  "resources/shaders/shader.frag");
+
+    game.terrainProgram.ID = Shader_CompileShaders("resources/shaders/terrainShader.vert",
+                                                   "resources/shaders/terrainShader.frag");
+    glUseProgram(game.shaderProgram.ID);
+
+    Camera_Init(&game.camera);
+
+    LoadResources(&game);
+    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+
+    Time_Init();
+    Time_SetMaxFramesPerSecond(6000);
+    while(game.gameState != EXIT)
+    {
+        Time_Begin();
+        ProcessInput(&game);
+        Player_Update(&game.player, game.terrain);
+        Draw(&game);
+
+        float FPS = Time_End();
+
+        if( !( Time_GetCountedFrames() % (int)FPS ) ) {
+            fprintf(stderr, "FPS: %.4f\n", FPS);
+        }
+    }
+
+    Window_Destroy(game.window);
+    CleanUp(&game);
+    SDL_Quit();
+    return 0;
+}
+
+void CleanUp(game_t* game)
+{
+    Shape_Free(game->entsShape);
+    Texture_Destroy(game->entsTexture);
+    Terrain_Destroy(game->terrain);
+
+    Shader_Destroy(game->shaderProgram.ID);
+    Shader_Destroy(game->terrainProgram.ID);
+    Render_Quit();
+}
+
+void LoadResources(game_t* game)
+{
+    Render_Init();
+    Uint32 start = SDL_GetTicks();
+
+    game->entsShape = Shape_MakeCube();
+    game->entsTexture = Texture_Create("resources/textures/gato.png");
+
+    Player_Init(&game->player);
+    game->player.entity.texture = game->entsTexture;
+    game->player.entity.shape = game->entsShape;
+
+    {
+        vec3_t position = { 0.0f, 3.0f, 0.0f };
+        float rotation[3] = { 0.0f, 45.0f, 45.0f };
+        game->ents[0].position = position;
+        game->ents[0].rotX = rotation[0];
+        game->ents[0].rotY = rotation[1];
+        game->ents[0].rotZ = rotation[2];
+        game->ents[0].shape = game->entsShape;
+        game->ents[0].texture = game->entsTexture;
+    }
+
+    {
+        vec3_t position = { -400.0f, 0.0f, -400.0f };
+        texture_t *blendmap = Texture_Create("resources/textures/blendmap.png");
+        TerrainTexturePack pack =
+        {
+            {
+                Texture_Create("resources/textures/soil1.png"),
+                Texture_Create("resources/textures/soil2.png"),
+                Texture_Create("resources/textures/soil4.png"),
+                Texture_Create("resources/textures/soil3.png"),
+            }
+        };
+        game->terrain = Terrain_Create(800, 800, "resources/textures/heightmap.png", blendmap, &pack);
+        game->terrain->position = position;
+    }
+
+    /* Shader Layouts */
+
+    game->shaderProgram.Texture = Shader_GetUniformLocation(game->shaderProgram.ID, "Texture");
+    game->shaderProgram.modelToWorld = Shader_GetUniformLocation(game->shaderProgram.ID, "Matrix_modelToWorld");
+    game->shaderProgram.totalTransform = Shader_GetUniformLocation(game->shaderProgram.ID, "Matrix_totalTransform");
+    game->shaderProgram.lightPosition = Shader_GetUniformLocation(game->shaderProgram.ID, "lightPosition");
+    game->shaderProgram.lightColor = Shader_GetUniformLocation(game->shaderProgram.ID, "lightColor");
+    game->shaderProgram.lightAttenuation = Shader_GetUniformLocation(game->shaderProgram.ID, "attenuation");
+
+    game->terrainProgram.modelToWorld = Shader_GetUniformLocation(game->terrainProgram.ID, "Matrix_modelToWorld");
+    game->terrainProgram.totalTransform = Shader_GetUniformLocation(game->terrainProgram.ID, "Matrix_totalTransform");
+    game->terrainProgram.lightPosition = Shader_GetUniformLocation(game->terrainProgram.ID, "lightPosition");
+    game->terrainProgram.lightColor = Shader_GetUniformLocation(game->terrainProgram.ID, "lightColor");
+    game->terrainProgram.lightAttenuation = Shader_GetUniformLocation(game->terrainProgram.ID, "attenuation");
+
+    game->terrainProgram.Texture_Background = Shader_GetUniformLocation(game->terrainProgram.ID, "Texture_Background");
+    game->terrainProgram.Texture_BlendMap = Shader_GetUniformLocation(game->terrainProgram.ID, "Texture_BlendMap");
+    game->terrainProgram.Texture_R = Shader_GetUniformLocation(game->terrainProgram.ID, "Texture_R");
+    game->terrainProgram.Texture_G = Shader_GetUniformLocation(game->terrainProgram.ID, "Texture_G");
+    game->terrainProgram.Texture_B = Shader_GetUniformLocation(game->terrainProgram.ID, "Texture_B");
+
+    fprintf(stderr, "Loading time: %u (ms)\n", SDL_GetTicks() - start);
+}
+
+void Draw(game_t* game)
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    /*We upload all the light vectors*/
+    static light_t diffuseLight[4] =
+    {
+        { {0.0f, 20.0f, 0.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+        { {10.0f, 20.0f, 0.0f}, {1.0f, 0.0f, 0.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+        { {20.0f, 20.0f, 0.0f}, {0.0f, 0.0f, 1.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+        { {30.0f, 20.0f, 0.0f}, {0.0f, 1.0f, 0.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+    };
+
+    Shader_SetUniformVec3(game->shaderProgram.ID, "World_eyePosition", (float*)&game->camera.position);
+    Render_LoadLights(&game->shaderProgram, diffuseLight, 4);
+
+    mat4_t viewMatrix, projectionMatrix, projectedViewMatrix;
+
+    viewMatrix = Camera_GetModelToViewMatrix(&game->camera);
+    projectionMatrix = mat4_perspective(60.0f, WINDOW_ASPECT_RATIO, 0.1f, 300.0f);
+    projectedViewMatrix = mat4_mul(&projectionMatrix, &viewMatrix);
+
+    Render_DrawEntity(&game->shaderProgram, &projectedViewMatrix, &game->player.entity);
+    Render_DrawEntity(&game->shaderProgram, &projectedViewMatrix, &game->ents[0]);
+
+    glUseProgram(game->terrainProgram.ID);
+
+    Shader_SetUniformVec3(game->terrainProgram.ID, "World_eyePosition", (float*)&game->camera.position);
+    Render_LoadLights(&game->terrainProgram, diffuseLight, 4);
+
+    Render_DrawTerrain(&game->terrainProgram, &projectedViewMatrix, game->terrain);
+
+    glUseProgram(game->shaderProgram.ID);
+
+    Window_Update(game->window);
+}
+
+void ProcessInput(game_t* game)
+{
+    vec2_t mousePosition;
+    SDL_Event e;
+    while(SDL_PollEvent(&e))
+    {
+        switch(e.type)
+        {
+        case SDL_QUIT:
+            game->gameState = EXIT;
+            break;
+
+        case SDL_MOUSEMOTION:
+            mousePosition = vec2_create(e.motion.x, e.motion.y);
+            Camera_MouseUpdate(&game->camera, &mousePosition);
+            break;
+
+        case SDL_KEYDOWN:
+            Input_PressKey(e.key.keysym.scancode);
+            break;
+
+        case SDL_KEYUP:
+            Input_ReleaseKey(e.key.keysym.scancode);
+            break;
+        }
+
+        if(Input_isKeyPressed(SDL_SCANCODE_UP))
+            Camera_Move_Foward(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_DOWN))
+            Camera_Move_Backward(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_LEFT))
+            Camera_Move_Left(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_RIGHT))
+            Camera_Move_Right(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_ESCAPE))
+            game->gameState = EXIT;
+    }
+}
diff --git a/07-july/src/math/math_util.c b/07-july/src/math/math_util.c
new file mode 100644
index 0000000..f58e447
--- /dev/null
+++ b/07-july/src/math/math_util.c
@@ -0,0 +1,10 @@
+#include "math_util.h"
+
+float baryCentric(vec3_t *p1, vec3_t *p2, vec3_t *p3, vec2_t *pos)
+{
+    float det = (p2->z - p3->z) * (p1->x - p3->x) + (p3->x - p2->x) * (p1->z - p3->z);
+	float l1 = ((p2->z - p3->z) * (pos->x - p3->x) + (p3->x - p2->x) * (pos->y - p3->z)) / det;
+	float l2 = ((p3->z - p1->z) * (pos->x - p3->x) + (p1->x - p3->x) * (pos->y - p3->z)) / det;
+	float l3 = 1.0f - l1 - l2;
+	return l1 * p1->y + l2 * p2->y + l3 * p3->y;
+}
diff --git a/07-july/src/math/math_util.h b/07-july/src/math/math_util.h
new file mode 100644
index 0000000..28a5464
--- /dev/null
+++ b/07-july/src/math/math_util.h
@@ -0,0 +1,9 @@
+#ifndef MATH_UTIL_H
+#define MATH_UTIL_H
+
+#include "vector3f.h"
+#include "vector2f.h"
+
+extern float baryCentric(vec3_t *p1, vec3_t *p2, vec3_t *p3, vec2_t *pos);
+
+#endif // MATH_UTIL_H
diff --git a/07-july/src/math/matrix4x4.c b/07-july/src/math/matrix4x4.c
new file mode 100644
index 0000000..c46895a
--- /dev/null
+++ b/07-july/src/math/matrix4x4.c
@@ -0,0 +1,180 @@
+#include "matrix4x4.h"
+#include "../util/util.h"
+#include <SDL2/SDL.h>
+
+void mat4_identity(mat4_t *a)
+{
+    int i;
+    for(i = 0; i < 4*4; i++)
+    {
+        a->data[i] = 0.0f;
+    }
+    a->data[0 + 0 * 4] = 1.0f;
+    a->data[1 + 1 * 4] = 1.0f;
+    a->data[2 + 2 * 4] = 1.0f;
+    a->data[3 + 3 * 4] = 1.0f;
+}
+
+mat4_t mat4_mul(const mat4_t* a, const mat4_t* b)
+{
+    int i, j, k;
+    GLfloat sum = 0.0f;
+    mat4_t c;
+    mat4_identity(&c);
+    for(i = 0; i < 4; i++)
+        for(j = 0; j < 4; j++){
+            for(k = 0; k < 4; k++){
+                sum += a->data[i + k * 4] * b->data[k + j * 4];
+            }
+            c.data[i + j * 4] = sum;
+            sum = 0.0f;
+        }
+
+    return c;
+}
+
+mat4_t mat4_translate(const vec3_t *a)
+{
+    mat4_t b;
+    mat4_identity(&b);
+    b.data[0 + 3 * 4] = a->x;
+    b.data[1 + 3 * 4] = a->y;
+    b.data[2 + 3 * 4] = a->z;
+    return b;
+}
+
+mat4_t mat4_scale(GLfloat x, GLfloat y, GLfloat z)
+{
+    mat4_t b;
+    mat4_identity(&b);
+    b.data[0 + 0 * 4] = x;
+    b.data[1 + 1 * 4] = y;
+    b.data[2 + 2 * 4] = z;
+    return b;
+}
+
+mat4_t mat4_rotate(GLfloat degrees, const vec3_t* a)
+{
+    mat4_t b;
+    mat4_identity(&b);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees)), o = 1-c;
+    b.data[0 + 0 * 4] = a->x * a->x * o + c;
+    b.data[0 + 1 * 4] = a->x * a->y * o - a->z * s;
+    b.data[0 + 2 * 4] = a->x * a->z * o + a->y * s;
+
+    b.data[1 + 0 * 4] = a->x * a->y * o + a->z * s;
+    b.data[1 + 1 * 4] = a->y * a->y * o + c;
+    b.data[1 + 2 * 4] = a->y * a->z * o - a->x * s;
+
+    b.data[2 + 0 * 4] = a->x * a->z * o - a->y * s;
+    b.data[2 + 1 * 4] = a->y * a->z * o + a->x * s;
+    b.data[2 + 2 * 4] = a->z * a->z * o + c;
+    return b;
+}
+
+mat4_t mat4_rotate_x(GLfloat degrees)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[1 + 1 * 4] = c;
+    a.data[2 + 1 * 4] = s;
+    a.data[1 + 2 * 4] = -s;
+    a.data[2 + 2 * 4] = c;
+    return a;
+}
+
+mat4_t mat4_rotate_y(GLfloat degrees)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[0 + 0 * 4] = c;
+    a.data[2 + 0 * 4] = -s;
+    a.data[0 + 2 * 4] = s;
+    a.data[2 + 2 * 4] = c;
+    return a;
+}
+
+mat4_t mat4_rotate_z(GLfloat degrees)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[0 + 0 * 4] = c;
+    a.data[1 + 0 * 4] = s;
+    a.data[0 + 1 * 4] = -s;
+    a.data[1 + 1 * 4] = c;
+    return a;
+}
+
+mat4_t mat4_perspective(GLfloat fov, GLfloat aspect, GLfloat zNear, GLfloat zFar)
+{
+    mat4_t a;
+    GLubyte i, j;
+    for(i = 0; i < 4; i++)
+        for(j = 0; j < 4; j++)
+            a.data[i + j * 4] = 0.0f;
+    fov = toRadians(fov); //To radians
+
+    a.data[0 + 0 * 4] = ( (1.0f / SDL_tanf( fov/2.0f )) / aspect);
+    a.data[1 + 1 * 4] = (1.0f / SDL_tanf( fov/2.0f ));
+    a.data[2 + 2 * 4] = -( (zFar + zNear) / (zFar - zNear) );
+    a.data[2 + 3 * 4] = -( ( 2.0f * zFar * zNear) / (zFar - zNear) );
+    a.data[3 + 2 * 4] = -1.0f;
+
+    return a;
+}
+
+mat4_t
+mat4_orthographic(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    a.data[0 + 0 * 4] = 2.0f / (right - left);
+    a.data[1 + 1 * 4] = 2.0f / (top - bottom);
+    a.data[2 + 2 * 4] = -1.0f;
+
+    a.data[0 + 3 * 4] = (left + right) / (left - right);
+    a.data[1 + 3 * 4] = (bottom + top) / (bottom - top);
+
+    return a;
+}
+
+mat4_t mat4_lookAt(vec3_t* eye, vec3_t* center, vec3_t* up)
+{
+    vec3_t temp = vec3_sub(center, eye);
+
+    vec3_t f = vec3_normalize(&temp);
+    vec3_t u = vec3_normalize(up);
+    temp = vec3_cross_mul(&f, &u);
+    vec3_t s = vec3_normalize(&temp);
+    u = vec3_cross_mul(&s, &f);
+
+    mat4_t a;
+    mat4_identity(&a);
+
+    a.data[0 + 0 * 4] = s.x;

+    a.data[0 + 1 * 4] = s.y;

+    a.data[0 + 2 * 4] = s.z;

+    a.data[1 + 0 * 4] = u.x;

+    a.data[1 + 1 * 4] = u.y;

+    a.data[1 + 2 * 4] = u.z;

+    a.data[2 + 0 * 4] =-f.x;

+    a.data[2 + 1 * 4] =-f.y;

+    a.data[2 + 2 * 4] =-f.z;

+    a.data[0 + 3 * 4] =-vec3_dot_mul(&s, eye);

+    a.data[1 + 3 * 4] =-vec3_dot_mul(&u, eye);

+    a.data[2 + 3 * 4] = vec3_dot_mul(&f, eye);
+

+    return a;
+}
+
+vec3_t mat4_mul_vec3(const mat4_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = a->data[0 + 0 * 4] * b->x + a->data[0 + 1 * 4] * b->y + a->data[0 + 2 * 4] * b->z + a->data[0 + 3 * 4];
+    c.y = a->data[1 + 0 * 4] * b->x + a->data[1 + 1 * 4] * b->y + a->data[1 + 2 * 4] * b->z + a->data[1 + 3 * 4];
+    c.z = a->data[2 + 0 * 4] * b->x + a->data[2 + 1 * 4] * b->y + a->data[2 + 2 * 4] * b->z + a->data[2 + 3 * 4];
+    return c;
+}
diff --git a/07-july/src/math/matrix4x4.h b/07-july/src/math/matrix4x4.h
new file mode 100644
index 0000000..6668fc5
--- /dev/null
+++ b/07-july/src/math/matrix4x4.h
@@ -0,0 +1,35 @@
+#ifndef MATRIX4X4_H
+#define MATRIX4X4_H
+
+#include <GL/glew.h>
+#include "vector3f.h"
+
+/* accesing data: row + column * width */
+typedef struct
+{
+    GLfloat data[16];
+} mat4_t;
+
+extern void mat4_identity(mat4_t* a);
+extern mat4_t mat4_mul(const mat4_t* a, const mat4_t* b);
+
+extern mat4_t mat4_translate(const vec3_t *a);
+extern mat4_t mat4_scale(GLfloat x, GLfloat y, GLfloat z);
+extern mat4_t mat4_rotate_x(GLfloat degrees);
+extern mat4_t mat4_rotate_y(GLfloat degrees);
+extern mat4_t mat4_rotate_z(GLfloat degrees);
+extern mat4_t mat4_rotate(GLfloat degrees, const vec3_t* a);
+
+extern mat4_t
+mat4_perspective(GLfloat fov, GLfloat aspect, GLfloat zNear, GLfloat zFar);
+
+extern mat4_t
+mat4_orthographic(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top);
+
+extern mat4_t
+mat4_lookAt(vec3_t* eye, vec3_t* center, vec3_t* up);
+
+extern vec3_t
+mat4_mul_vec3(const mat4_t* a, const vec3_t* b);
+
+#endif // MATRIX4X4_H
diff --git a/07-july/src/math/vector2f.c b/07-july/src/math/vector2f.c
new file mode 100644
index 0000000..5a3e29d
--- /dev/null
+++ b/07-july/src/math/vector2f.c
@@ -0,0 +1,60 @@
+#include "vector2f.h"
+#include <SDL2/SDL.h>
+
+vec2_t vec2_create(GLfloat x, GLfloat y)
+{
+    vec2_t a = {x, y};
+    return a;
+}
+
+vec2_t vec2_add(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    return c;
+}
+
+vec2_t vec2_sub(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    return c;
+}
+
+vec2_t vec2_scalar_mul(const vec2_t* a, GLfloat scalar)
+{
+    vec2_t c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    return c;
+}
+
+GLfloat vec2_dot_mul(const vec2_t* a, const vec2_t* b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) );
+}
+
+
+vec2_t vec2_cross_mul(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = (a->x * b->y) - (a->y * b->x);
+    c.y = (a->y * b->x) - (a->x * b->y);
+    return c;
+}
+
+GLfloat vec2_length(vec2_t* a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) );
+}
+
+vec2_t vec2_normalize(vec2_t* a)
+{
+    vec2_t b;
+    GLfloat length = vec2_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    return b;
+}
diff --git a/07-july/src/math/vector2f.h b/07-july/src/math/vector2f.h
new file mode 100644
index 0000000..8c20b9a
--- /dev/null
+++ b/07-july/src/math/vector2f.h
@@ -0,0 +1,20 @@
+#ifndef VECTOR2F_H
+#define VECTOR2F_H
+
+#include <GL/glew.h>
+
+typedef struct
+{
+    GLfloat x, y;
+} vec2_t;
+
+extern vec2_t vec2_create(GLfloat x, GLfloat y);
+extern vec2_t vec2_add(const vec2_t* a, const vec2_t* b);
+extern vec2_t vec2_sub(const vec2_t* a, const vec2_t* b);
+extern vec2_t vec2_scalar_mul(const vec2_t* a, GLfloat scalar);
+extern GLfloat vec2_dot_mul(const vec2_t* a, const vec2_t* b);
+extern vec2_t vec2_cross_mul(const vec2_t* a, const vec2_t* b);
+extern GLfloat vec2_length(vec2_t* a);
+extern vec2_t vec2_normalize(vec2_t* a);
+
+#endif // VECTOR2F_H
diff --git a/07-july/src/math/vector3f.c b/07-july/src/math/vector3f.c
new file mode 100644
index 0000000..d68acf6
--- /dev/null
+++ b/07-july/src/math/vector3f.c
@@ -0,0 +1,65 @@
+#include "vector3f.h"
+#include <SDL2/SDL.h>
+
+vec3_t vec3_create(GLfloat x, GLfloat y, GLfloat z)
+{
+    vec3_t a = {x, y, z};
+    return a;
+}
+
+vec3_t vec3_add(const vec3_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    c.z = a->z + b->z;
+    return c;
+}
+
+vec3_t vec3_sub(const vec3_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    c.z = a->z - b->z;
+    return c;
+}
+
+vec3_t vec3_scalar_mul(const vec3_t* a, GLfloat scalar)
+{
+    vec3_t c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    c.z = a->z * scalar;
+    return c;
+}
+
+GLfloat vec3_dot_mul(const vec3_t* a, const vec3_t* b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) + (a->z * b->z) );
+}
+
+
+vec3_t vec3_cross_mul(const vec3_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = (a->y * b->z) - (a->z * b->y);
+    c.y = (a->z * b->x) - (a->x * b->z);
+    c.z = (a->x * b->y) - (a->y * b->x);
+    return c;
+}
+
+GLfloat vec3_length(vec3_t* a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f));
+}
+
+vec3_t vec3_normalize(vec3_t* a)
+{
+    vec3_t b;
+    GLfloat length = vec3_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    b.z = a->z / length;
+    return b;
+}
diff --git a/07-july/src/math/vector3f.h b/07-july/src/math/vector3f.h
new file mode 100644
index 0000000..ab255d1
--- /dev/null
+++ b/07-july/src/math/vector3f.h
@@ -0,0 +1,20 @@
+#ifndef VECTOR3F_H
+#define VECTOR3F_H
+
+#include <GL/glew.h>
+
+typedef struct
+{
+    GLfloat x, y, z;
+} vec3_t;
+
+extern vec3_t vec3_create(GLfloat x, GLfloat y, GLfloat z);
+extern vec3_t vec3_add(const vec3_t* a, const vec3_t* b);
+extern vec3_t vec3_sub(const vec3_t* a, const vec3_t* b);
+extern vec3_t vec3_scalar_mul(const vec3_t* a, GLfloat scalar);
+extern GLfloat vec3_dot_mul(const vec3_t* a, const vec3_t* b);
+extern vec3_t vec3_cross_mul(const vec3_t* a, const vec3_t* b);
+extern GLfloat vec3_length(vec3_t* a);
+extern vec3_t vec3_normalize(vec3_t* a);
+
+#endif // VECTOR3F_H
diff --git a/07-july/src/math/vector4f.c b/07-july/src/math/vector4f.c
new file mode 100644
index 0000000..735e679
--- /dev/null
+++ b/07-july/src/math/vector4f.c
@@ -0,0 +1,70 @@
+#include "vector4f.h"
+#include <SDL2/SDL.h>
+
+vec4_t vec4_create(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
+{
+    vec4_t a = {x, y, z, w};
+    return a;
+}
+
+vec4_t vec4_add(const vec4_t* a, const vec4_t* b)
+{
+    vec4_t c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    c.z = a->z + b->z;
+    c.w = a->w + b->w;
+    return c;
+}
+
+vec4_t vec4_sub(const vec4_t* a, const vec4_t* b)
+{
+    vec4_t c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    c.z = a->z - b->z;
+    c.w = a->w - b->w;
+    return c;
+}
+
+vec4_t vec4_scalar_mul(const vec4_t* a, GLfloat scalar)
+{
+    vec4_t c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    c.z = a->z * scalar;
+    c.w = a->w * scalar;
+    return c;
+}
+
+GLfloat vec4_dot_mul(const vec4_t* a, const vec4_t* b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) + (a->z * b->z) + (a->w * b->w) );
+}
+
+
+vec4_t vec4_cross_mul(const vec4_t* a, const vec4_t* b)
+{
+    vec4_t c;
+    c.x = (a->y * b->z) - (a->z * b->y);
+    c.y = (a->z * b->x) - (a->x * b->z);
+    c.z = (a->x * b->y) - (a->y * b->x);
+    c.w = 1.0f;
+    return c;
+}
+
+GLfloat vec4_length(vec4_t* a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f) + SDL_pow(a->w, 2.0f) );
+}
+
+vec4_t vec4_normalize(vec4_t* a)
+{
+    vec4_t b;
+    GLfloat length = vec4_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    b.z = a->z / length;
+    b.w = a->w / length;
+    return b;
+}
diff --git a/07-july/src/math/vector4f.h b/07-july/src/math/vector4f.h
new file mode 100644
index 0000000..4f83695
--- /dev/null
+++ b/07-july/src/math/vector4f.h
@@ -0,0 +1,20 @@
+#ifndef VECTOR4F_H
+#define VECTOR4F_H
+
+#include <GL/glew.h>
+
+typedef struct
+{
+    GLfloat x, y, z, w;
+} vec4_t;
+
+extern vec4_t vec4_create(GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+extern vec4_t vec4_add(const vec4_t* a, const vec4_t* b);
+extern vec4_t vec4_sub(const vec4_t* a, const vec4_t* b);
+extern vec4_t vec4_scalar_mul(const vec4_t* a, GLfloat scalar);
+extern GLfloat vec4_dot_mul(const vec4_t* a, const vec4_t* b);
+extern vec4_t vec4_cross_mul(const vec4_t* a, const vec4_t* b);
+extern GLfloat vec4_length(vec4_t* a);
+extern vec4_t vec4_normalize(vec4_t* a);
+
+#endif // VECTOR4F_H
diff --git a/07-july/src/player.c b/07-july/src/player.c
new file mode 100644
index 0000000..02a417b
--- /dev/null
+++ b/07-july/src/player.c
@@ -0,0 +1,62 @@
+#include "player.h"
+#include "util/util_time.h"
+#include "input.h"
+#include "util/util.h"
+
+#define MAX_MOVEMENT_SPEED 10
+#define MAX_ROTATION_SPEED 100
+#define GRAVITY -15
+#define JUMP_POWER 7
+
+static void jump(player_t* player)
+{
+    player->verticalSpeed = JUMP_POWER;
+}
+
+static void check_input(player_t* player)
+{
+    if(Input_isKeyPressed(SDL_SCANCODE_W)) {
+        player->speed = MAX_MOVEMENT_SPEED;
+    } else if(Input_isKeyPressed(SDL_SCANCODE_S)) {
+        player->speed = -MAX_MOVEMENT_SPEED;
+    } else {
+        player->speed = 0.0f;
+    }
+
+    if(Input_isKeyPressed(SDL_SCANCODE_A)) {
+        player->turnSpeed = MAX_ROTATION_SPEED;
+    } else if(Input_isKeyPressed(SDL_SCANCODE_D)) {
+        player->turnSpeed = -MAX_ROTATION_SPEED;
+    } else {
+        player->turnSpeed = 0.0f;
+    }
+
+    if(Input_isKeyPressed(SDL_SCANCODE_SPACE)) {
+        jump(player);
+    }
+}
+
+void Player_Init(player_t* player)
+{
+    player->entity.position = vec3_create(0.0f, 6.0f, 0.0f);
+    player->entity.rotX = player->entity.rotY = player->entity.rotZ = 0;
+    player->speed = player->turnSpeed = player->verticalSpeed = 0;
+}
+
+void Player_Update(player_t *player, terrain_t *terrain)
+{
+    check_input(player);
+    player->entity.rotY += player->turnSpeed * Time_GetFrameTime();
+    player->entity.position.x += SDL_sinf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
+    player->entity.position.z += SDL_cosf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
+
+    player->verticalSpeed += GRAVITY * Time_GetFrameTime();
+
+    player->entity.position.y += player->verticalSpeed * Time_GetFrameTime();
+
+    GLfloat terrainHeight = Terrain_GetHeightOfTerrain(terrain, player->entity.position.x, player->entity.position.z);
+    if(player->entity.position.y - 1.0f < terrainHeight) {
+        player->entity.position.y = terrainHeight + 1.0f;
+        player->verticalSpeed = 0.0f;
+    }
+}
diff --git a/07-july/src/player.h b/07-july/src/player.h
new file mode 100644
index 0000000..654dc17
--- /dev/null
+++ b/07-july/src/player.h
@@ -0,0 +1,17 @@
+#ifndef PLAYER_H
+#define PLAYER_H
+
+#include "renderer/entity.h"
+#include "math/vector3f.h"
+#include "terrain.h"
+
+typedef struct
+{
+    entity_t entity;
+    float speed, turnSpeed, verticalSpeed;
+} player_t;
+
+extern void Player_Init(player_t* player);
+extern void Player_Update(player_t* player, terrain_t *terrain);
+
+#endif // PLAYER_H
diff --git a/07-july/src/renderer/entity.c b/07-july/src/renderer/entity.c
new file mode 100644
index 0000000..b96491d
--- /dev/null
+++ b/07-july/src/renderer/entity.c
@@ -0,0 +1,18 @@
+#include "entity.h"
+
+mat4_t Entity_GetModelTransform(entity_t* entity)
+{
+    mat4_t temp;
+    mat4_t rotation = mat4_rotate_x(entity->rotX);
+    temp = mat4_rotate_y(entity->rotY);
+    rotation = mat4_mul(&rotation, &temp);
+    temp = mat4_rotate_z(entity->rotZ);
+    rotation = mat4_mul(&rotation, &temp);
+
+    temp = mat4_translate(&entity->position);
+
+    mat4_t modelTransform = mat4_mul(&temp, &rotation);
+
+    return modelTransform;
+}
+
diff --git a/07-july/src/renderer/entity.h b/07-july/src/renderer/entity.h
new file mode 100644
index 0000000..8954c7f
--- /dev/null
+++ b/07-july/src/renderer/entity.h
@@ -0,0 +1,20 @@
+#ifndef ENTITY_H
+#define ENTITY_H
+
+#include "../math/vector3f.h"
+#include "../math/matrix4x4.h"
+
+#include "shape.h"
+#include "../texture.h"
+
+typedef struct
+{
+    shape_t *shape;
+    texture_t *texture;
+    vec3_t position;
+    float rotX, rotY, rotZ;
+} entity_t;
+
+extern mat4_t Entity_GetModelTransform(entity_t* entity);
+
+#endif // ENTITY_H
diff --git a/07-july/src/renderer/renderer.c b/07-july/src/renderer/renderer.c
new file mode 100644
index 0000000..5b8638c
--- /dev/null
+++ b/07-july/src/renderer/renderer.c
@@ -0,0 +1,98 @@
+#include "renderer.h"
+#include <string.h>
+
+static const int MAX_LIGHTS = 4;
+
+void Render_Init()
+{
+
+}
+
+void Render_LoadLights(Shader_Layout *layout, light_t *lights, int n)
+{
+    vec3_t light_positions[MAX_LIGHTS];
+    color_t light_colors[MAX_LIGHTS];
+    vec3_t attenuation[MAX_LIGHTS];
+
+    light_t defaultLight = { {0.0f, 0.0f, 0.0f}, {0.0f, 0.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f} };
+
+    int i;
+    for(i = 0; i < MAX_LIGHTS; i++)
+    {
+        if(i < MAX_LIGHTS)
+        {
+            light_positions[i] = lights[i].position;
+            light_colors[i] = lights[i].color;
+            attenuation[i] = lights[i].attenuation;
+        }
+        else
+        {
+            light_positions[i] = defaultLight.position;
+            light_colors[i] = defaultLight.color;
+            attenuation[i] = defaultLight.attenuation;
+        }
+
+    }
+
+    glUniform3fv(layout->lightPosition, MAX_LIGHTS, (float*)light_positions);
+    glUniform4fv(layout->lightColor, MAX_LIGHTS, (float*)light_colors);
+    glUniform3fv(layout->lightAttenuation, MAX_LIGHTS, (float*)attenuation);
+
+}
+
+void Render_DrawEntity(Shader_Layout *layout, mat4_t *projectedViewMatrix, entity_t *entity)
+{
+    glBindVertexArray(entity->shape->vao);
+
+    /*We need the model to world matrix in our shader in order to rotate the normals*/
+    mat4_t modelTransform = Entity_GetModelTransform(entity);
+    glUniformMatrix4fv(layout->modelToWorld, 1, GL_FALSE, modelTransform.data);
+
+    mat4_t totalMatrix = mat4_mul(projectedViewMatrix, &modelTransform);
+    glUniformMatrix4fv(layout->totalTransform, 1, GL_FALSE, totalMatrix.data);
+
+    glActiveTexture(GL_TEXTURE0);
+    glUniform1i(layout->Texture, 0);
+    Texture_Bind(entity->texture);
+
+    glDrawElements(GL_TRIANGLES, entity->shape->num_indices, GL_UNSIGNED_SHORT, NULL);
+    glBindVertexArray(0);
+}
+
+void Render_DrawTerrain(Shader_Layout *layout, mat4_t *projectedViewMatrix, terrain_t *terrain)
+{
+    glBindVertexArray(terrain->shape->vao);
+
+    /* We need the model to world matrix in our shader in order to rotate the normals */
+    mat4_t modelTransform = mat4_translate(&terrain->position);
+    glUniformMatrix4fv(layout->modelToWorld, 1, GL_FALSE, modelTransform.data);
+
+    mat4_t totalMatrix = mat4_mul(projectedViewMatrix, &modelTransform);
+    glUniformMatrix4fv(layout->totalTransform, 1, GL_FALSE, totalMatrix.data);
+
+    glUniform1i(layout->Texture_Background, 0);
+    glUniform1i(layout->Texture_R, 1);
+    glUniform1i(layout->Texture_G, 2);
+    glUniform1i(layout->Texture_B, 3);
+    glUniform1i(layout->Texture_BlendMap, 4);
+
+    glActiveTexture(GL_TEXTURE0);
+    Texture_Bind(terrain->textures.texture[0]);
+    glActiveTexture(GL_TEXTURE1);
+    Texture_Bind(terrain->textures.texture[1]);
+    glActiveTexture(GL_TEXTURE2);
+    Texture_Bind(terrain->textures.texture[2]);
+    glActiveTexture(GL_TEXTURE3);
+    Texture_Bind(terrain->textures.texture[3]);
+    glActiveTexture(GL_TEXTURE4);
+    Texture_Bind(terrain->blendmap);
+
+    glDrawElements(GL_TRIANGLES, terrain->shape->num_indices, GL_UNSIGNED_SHORT, NULL);
+
+    glBindVertexArray(0);
+}
+
+void Render_Quit()
+{
+
+}
diff --git a/07-july/src/renderer/renderer.h b/07-july/src/renderer/renderer.h
new file mode 100644
index 0000000..7d06fdc
--- /dev/null
+++ b/07-july/src/renderer/renderer.h
@@ -0,0 +1,15 @@
+#ifndef RENDERER_H
+#define RENDERER_H
+
+#include "../graphics/shaders.h"
+#include "entity.h"
+#include "../terrain.h"
+#include "../light.h"
+
+extern void Render_Init();
+extern void Render_LoadLights(Shader_Layout *layout, light_t *lights, int n);
+extern void Render_DrawEntity(Shader_Layout *layout, mat4_t *projectedViewMatrix, entity_t *entity);
+extern void Render_DrawTerrain(Shader_Layout *layout, mat4_t *projectedViewMatrix, terrain_t *terrain);
+extern void Render_Quit();
+
+#endif // RENDERER_H
diff --git a/07-july/src/renderer/shape.c b/07-july/src/renderer/shape.c
new file mode 100644
index 0000000..d48b847
--- /dev/null
+++ b/07-july/src/renderer/shape.c
@@ -0,0 +1,302 @@
+#include "shape.h"
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "../util/util.h"
+
+#define NUM_ARRAY_ELEMENTS(a) sizeof(a) / sizeof(*a)
+
+shape_t* Shape_CreateFromRawData(vertex_t* vertices, GLsizeiptr vertexBufferSize,
+                                 GLushort* indices, GLsizeiptr indexBufferSize)
+{
+    shape_t* shape = (shape_t*) malloc( sizeof(shape_t) );
+
+    shape->num_indices = ( indexBufferSize / sizeof(GLushort) );
+
+    glGenVertexArrays(1, &shape->vao);
+    glGenBuffers(1, &shape->vbo);
+    glGenBuffers(1, &shape->ebo);
+
+    glBindVertexArray(shape->vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, shape->vbo);
+    glBufferData(GL_ARRAY_BUFFER, vertexBufferSize, vertices, GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, shape->ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexBufferSize, indices, GL_STATIC_DRAW);
+
+    glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
+    glEnableVertexAttribArray(2);
+    glEnableVertexAttribArray(3);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, position) );
+    glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, color) );
+    glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, texCoord) );
+    glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, normal) );
+
+    glBindVertexArray(0);
+
+    return shape;
+}
+
+shape_t* Shape_MakeCube()
+{
+    vertex_t data[] =
+    {
+        { {-1.0f, +1.0f, +1.0f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.0f, +1.0f, +0.0f} },
+		{ {+1.0f, +1.0f, +1.0f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 1.0f}, {+0.0f, +1.0f, +0.0f} },
+		{ {+1.0f, +1.0f, -1.0f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {1.0f, 1.0f}, {+0.0f, +1.0f, +0.0f} },
+		{ {-1.0f, +1.0f, -1.0f}, {+1.0f, +1.0f, +1.0f, +1.0f}, {1.0f, 0.0f}, {+0.0f, +1.0f, +0.0f} },
+
+		{ {-1.0f, +1.0f, -1.0f}, {+1.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.0f, +0.0f, -1.0f} },
+		{ {+1.0f, +1.0f, -1.0f}, {+0.0f, +0.5f, +0.2f, +1.0f}, {0.0f, 1.0f}, {+0.0f, +0.0f, -1.0f} },
+		{ {+1.0f, -1.0f, -1.0f}, {+0.8f, +0.6f, +0.4f, +1.0f}, {1.0f, 1.0f}, {+0.0f, +0.0f, -1.0f} },
+		{ {-1.0f, -1.0f, -1.0f}, {+0.3f, +1.0f, +0.5f, +1.0f}, {1.0f, 0.0f}, {+0.0f, +0.0f, -1.0f} },
+
+		{ {+1.0f, +1.0f, -1.0f}, {+0.2f, +0.5f, +0.2f, +1.0f}, {0.0f, 0.0f}, {+1.0f, +0.0f, +0.0f} },
+		{ {+1.0f, +1.0f, +1.0f}, {+0.9f, +0.3f, +0.7f, +1.0f}, {0.0f, 1.0f}, {+1.0f, +0.0f, +0.0f} },
+		{ {+1.0f, -1.0f, +1.0f}, {+0.3f, +0.7f, +0.5f, +1.0f}, {1.0f, 1.0f}, {+1.0f, +0.0f, +0.0f} },
+		{ {+1.0f, -1.0f, -1.0f}, {+0.5f, +0.7f, +0.5f, +1.0f}, {1.0f, 0.0f}, {+1.0f, +0.0f, +0.0f} },
+
+		{ {-1.0f, +1.0f, +1.0f}, {+0.7f, +0.8f, +0.2f, +1.0f}, {0.0f, 0.0f}, {-1.0f, +0.0f, +0.0f} },
+		{ {-1.0f, +1.0f, -1.0f}, {+0.5f, +0.7f, +0.3f, +1.0f}, {0.0f, 1.0f}, {-1.0f, +0.0f, +0.0f} },
+		{ {-1.0f, -1.0f, -1.0f}, {+0.4f, +0.7f, +0.7f, +1.0f}, {1.0f, 1.0f}, {-1.0f, +0.0f, +0.0f} },
+		{ {-1.0f, -1.0f, +1.0f}, {+0.2f, +0.5f, +1.0f, +1.0f}, {1.0f, 0.0f}, {-1.0f, +0.0f, +0.0f} },
+
+		{ {+1.0f, +1.0f, +1.0f}, {+0.6f, +1.0f, +0.7f, +1.0f}, {0.0f, 0.0f}, {+0.0f, +0.0f, +1.0f} },
+		{ {-1.0f, +1.0f, +1.0f}, {+0.6f, +0.4f, +0.8f, +1.0f}, {0.0f, 1.0f}, {+0.0f, +0.0f, +1.0f} },
+		{ {-1.0f, -1.0f, +1.0f}, {+0.2f, +0.8f, +0.7f, +1.0f}, {1.0f, 1.0f}, {+0.0f, +0.0f, +1.0f} },
+		{ {+1.0f, -1.0f, +1.0f}, {+0.2f, +0.7f, +1.0f, +1.0f}, {1.0f, 0.0f}, {+0.0f, +0.0f, +1.0f} },
+
+		{ {+1.0f, -1.0f, -1.0f}, {+0.8f, +0.3f, +0.7f, +1.0f}, {0.0f, 0.0f}, {+0.0f, -1.0f, +0.0f} },
+		{ {-1.0f, -1.0f, -1.0f}, {+0.8f, +0.9f, +0.5f, +1.0f}, {0.0f, 1.0f}, {+0.0f, -1.0f, +0.0f} },
+		{ {-1.0f, -1.0f, +1.0f}, {+0.5f, +0.8f, +0.5f, +1.0f}, {1.0f, 1.0f}, {+0.0f, -1.0f, +0.0f} },
+        { {+1.0f, -1.0f, +1.0f}, {+0.9f, +1.0f, +0.2f, +1.0f}, {1.0f, 0.0f}, {+0.0f, -1.0f, +0.0f} },
+    };
+
+    GLushort indices[] =  {
+        0,   1,  2,  0,  2,  3, // Top
+		4,   5,  6,  4,  6,  7, // Front
+		8,   9, 10,  8, 10, 11, // Right
+		12, 13, 14, 12, 14, 15, // Left
+		16, 17, 18, 16, 18, 19, // Back
+		20, 22, 21, 20, 23, 22, // Bottom
+    };
+
+    GLsizeiptr vertexBufferSize = NUM_ARRAY_ELEMENTS(data) * sizeof(vertex_t);
+    GLsizeiptr indexBufferSize = NUM_ARRAY_ELEMENTS(indices) * sizeof(GLushort);
+
+    return Shape_CreateFromRawData(data, vertexBufferSize, indices, indexBufferSize);
+}
+
+shape_t* Shape_MakeArrow()
+{
+    vertex_t data[] =
+	{
+		// Top side of arrow head
+		{ {+0.00f, +0.25f, -0.25f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		{ {+0.50f, +0.25f, -0.25f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		{ {+0.00f, +0.25f, -1.00f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		{ {-0.50f, +0.25f, -0.25f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		// Bottom side of arrow head
+		{ {+0.00f, -0.25f, -0.25f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		{ {+0.50f, -0.25f, -0.25f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		{ {+0.00f, -0.25f, -1.00f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		{ {-0.50f, -0.25f, -0.25f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		// Right side of arrow tip
+		{ {+0.50f, +0.25f, -0.25f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {0.83205032f, 0.00f, -0.55470026f} },
+		{ {+0.00f, +0.25f, -1.00f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {0.83205032f, 0.00f, -0.55470026f} },
+		{ {+0.00f, -0.25f, -1.00f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {0.83205032f, 0.00f, -0.55470026f} },
+		{ {+0.50f, -0.25f, -0.25f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {0.83205032f, 0.00f, -0.55470026f} },
+		// Left side of arrow tip
+		{ {+0.00f, +0.25f, -1.00f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-0.55708605f, 0.00f, -0.37139067f} },
+		{ {-0.50f, +0.25f, -0.25f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-0.55708605f, 0.00f, -0.37139067f} },
+		{ {+0.00f, -0.25f, -1.00f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-0.55708605f, 0.00f, -0.37139067f} },
+		{ {-0.50f, -0.25f, -0.25f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-0.55708605f, 0.00f, -0.37139067f} },
+		// Back side of arrow tip
+		{ {-0.50f, +0.25f, -0.25f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+		{ {+0.50f, +0.25f, -0.25f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+		{ {-0.50f, -0.25f, -0.25f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+		{ {+0.50f, -0.25f, -0.25f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+		// Top side of back of arrow
+		{ {+0.25f, +0.25f, -0.25f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		{ {+0.25f, +0.25f, +1.00f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		{ {-0.25f, +0.25f, +1.00f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		{ {-0.25f, +0.25f, -0.25f}, {+1.0f, +0.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +1.00f, +0.00f} },
+		// Bottom side of back of arrow
+		{ {+0.25f, -0.25f, -0.25f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		{ {+0.25f, -0.25f, +1.00f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		{ {-0.25f, -0.25f, +1.00f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		{ {-0.25f, -0.25f, -0.25f}, {+0.0f, +0.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.00f, -1.00f, +0.00f} },
+		// Right side of back of arrow
+		{ {+0.25f, +0.25f, -0.25f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+1.00f, +0.00f, +0.00f} },
+		{ {+0.25f, -0.25f, -0.25f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+1.00f, +0.00f, +0.00f} },
+		{ {+0.25f, -0.25f, +1.00f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+1.00f, +0.00f, +0.00f} },
+		{ {+0.25f, +0.25f, +1.00f}, {+0.6f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {+1.00f, +0.00f, +0.00f} },
+		// Left side of back of arrow
+		{ {-0.25f, +0.25f, -0.25f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-1.00f, +0.00f, +0.00f} },
+		{ {-0.25f, -0.25f, -0.25f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-1.00f, +0.00f, +0.00f} },
+		{ {-0.25f, -0.25f, +1.00f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-1.00f, +0.00f, +0.00f} },
+		{ {-0.25f, +0.25f, +1.00f}, {+0.0f, +1.0f, +0.0f, +1.0f}, {0.0f, 0.0f}, {-1.00f, +0.00f, +0.00f} },
+		// Back side of back of arrow
+		{ {-0.25f, +0.25f, +1.00f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+		{ {+0.25f, +0.25f, +1.00f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+		{ {-0.25f, -0.25f, +1.00f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+		{ {+0.25f, -0.25f, +1.00f}, {+0.5f, +0.5f, +0.5f, +1.0f}, {0.0f, 0.0f}, {+0.00f, +0.00f, +1.00f} },
+	};
+
+	GLushort indices[] = {
+		0, 1, 2, // Top
+		0, 2, 3,
+		4, 6, 5, // Bottom
+		4, 7, 6,
+		8, 10, 9, // Right side of arrow tip
+		8, 11, 10,
+		12, 15, 13, // Left side of arrow tip
+		12, 14, 15,
+		16, 19, 17, // Back side of arrow tip
+		16, 18, 19,
+		20, 22, 21, // Top side of back of arrow
+		20, 23, 22,
+		24, 25, 26, // Bottom side of back of arrow
+		24, 26, 27,
+		28, 30, 29, // Right side of back of arrow
+		28, 31, 30,
+		32, 33, 34, // Left side of back of arrow
+		32, 34, 35,
+		36, 39, 37, // Back side of back of arrow
+		36, 38, 39,
+	};
+
+    GLsizeiptr vertexBufferSize = NUM_ARRAY_ELEMENTS(data) * sizeof(vertex_t);
+    GLsizeiptr indexBufferSize = NUM_ARRAY_ELEMENTS(indices) * sizeof(GLushort);
+
+    return Shape_CreateFromRawData(data, vertexBufferSize, indices, indexBufferSize);
+}
+
+shape_t* Shape_MakeQuad()
+{
+    vertex_t data[] =
+    {
+        { {+1.0f, +1.0f, +0.0f}, {+1.0f, +1.0f, +1.0f, +1.0f}, {1.0f, 1.0f}, {+0.0f, +0.0f, +1.0f} },
+        { {-1.0f, +1.0f, +0.0f}, {+1.0f, +1.0f, +1.0f, +1.0f}, {0.0f, 1.0f}, {+0.0f, +0.0f, +1.0f} },
+        { {+1.0f, -1.0f, +0.0f}, {+1.0f, +1.0f, +1.0f, +1.0f}, {1.0f, 0.0f}, {+0.0f, +0.0f, +1.0f} },
+        { {-1.0f, -1.0f, +0.0f}, {+1.0f, +1.0f, +1.0f, +1.0f}, {0.0f, 0.0f}, {+0.0f, +0.0f, +1.0f} },
+    };
+
+    GLushort indices[] =
+    {
+        0, 1, 2, 1, 3, 2
+    };
+
+    GLsizeiptr vertexBufferSize = NUM_ARRAY_ELEMENTS(data) * sizeof(vertex_t);
+    GLsizeiptr indexBufferSize = NUM_ARRAY_ELEMENTS(indices) * sizeof(GLushort);
+
+    return Shape_CreateFromRawData(data, vertexBufferSize, indices, indexBufferSize);
+}
+
+#define BUFFER_SIZE 128
+
+shape_t* Shape_LoadOBJ(const char* path)
+{
+    vec3_t* vertices = NULL;
+    vec2_t* textures = NULL;
+    vec3_t* normals = NULL;
+
+    vertex_t* data = NULL;
+    GLushort* indices = NULL;
+
+    unsigned int vertices_count = 0, textures_count = 0, normals_count = 0, index_pointer = 0, faces_count = 0;
+    int count = 0;
+    int texture[3], normal[3], verts[3];
+
+    FILE* file = fopen(path, "r");
+    if(file == NULL)
+        Util_FatalError(".obj file could not be loaded!");
+
+    char buffer[BUFFER_SIZE];
+    while(!feof(file))
+    {
+        fgets(buffer, BUFFER_SIZE, file);
+        switch(buffer[0])
+        {
+        case 'v':
+            if(buffer[1] == 't') {
+                textures = (vec2_t*) realloc(textures, sizeof(vec2_t) * (++textures_count) );
+                count = sscanf(buffer, "vt %f %f\n", &textures[textures_count-1].x, &textures[textures_count-1].y);
+                if(count != 2)
+                    Util_FatalError("Bad texture coordinates on .obj file");
+            } else if(buffer[1] == 'n') {
+                normals = (vec3_t*) realloc(normals, sizeof(vec3_t) * (++normals_count) );
+                count = sscanf(buffer, "vn %f %f %f\n", &normals[normals_count-1].x,
+                               &normals[normals_count-1].y, &normals[normals_count-1].z);
+                if(count != 3)
+                    Util_FatalError("Bad normals data on .obj file");
+            } else {
+                vertices = (vec3_t*) realloc(vertices, sizeof(vec3_t) * (++vertices_count) );
+                count = sscanf(buffer, "v %f %f %f\n", &vertices[vertices_count-1].x,
+                               &vertices[vertices_count-1].y, &vertices[vertices_count-1].z);
+                if(count != 3)
+                    Util_FatalError("Bad vertices data on .obj file");
+            }
+            break;
+        case 'f':
+            data = (vertex_t*) realloc( data, sizeof(vertex_t) * (++faces_count * 3) );
+            indices = (GLushort*) realloc( indices, sizeof(GLushort) * (++faces_count * 3) );
+
+            count = sscanf(buffer, "f %d/%d/%d %d/%d/%d %d/%d/%d\n",
+                   &verts[0], &texture[0], &normal[0], &verts[1], &texture[1], &normal[1],
+                   &verts[2], &texture[2], &normal[2]);
+            if(count != 9)
+                Util_FatalError("Bad face data on .obj file");
+
+            indices[index_pointer] = index_pointer;
+            data[index_pointer].position = vertices[verts[0]-1];
+            data[index_pointer].texCoord = textures[texture[0]-1];
+            data[index_pointer++].normal = normals[normal[0]-1];
+
+            indices[index_pointer] = index_pointer;
+            data[index_pointer].position = vertices[verts[1]-1];
+            data[index_pointer].texCoord = textures[texture[1]-1];
+            data[index_pointer++].normal = normals[normal[1]-1];
+
+            indices[index_pointer] = index_pointer;
+            data[index_pointer].position = vertices[verts[2]-1];
+            data[index_pointer].texCoord = textures[texture[2]-1];
+            data[index_pointer++].normal = normals[normal[2]-1];
+
+            break;
+        default:
+            break;
+        }
+    }
+
+    free(vertices);
+    free(normals);
+    free(textures);
+    fclose(file);
+
+    /*Remember, each face contains 3 vertex -> (faces_count * 3)*/
+
+    GLsizeiptr vertexBufferSize = faces_count * sizeof(vertex_t) * 3;
+    GLsizeiptr indexBufferSize = faces_count * sizeof(GLushort) * 3;
+
+    shape_t* shape = Shape_CreateFromRawData(data, vertexBufferSize, indices, indexBufferSize);
+
+    free(data);
+    free(indices);
+
+    return shape;
+}
+
+void Shape_Free(shape_t* shape)
+{
+    if(shape)
+    {
+        glDeleteBuffers(1, &shape->vbo);
+        glDeleteBuffers(1, &shape->ebo);
+        glDeleteVertexArrays(1, &shape->vao);
+        free(shape);
+    }
+}
diff --git a/07-july/src/renderer/shape.h b/07-july/src/renderer/shape.h
new file mode 100644
index 0000000..b019333
--- /dev/null
+++ b/07-july/src/renderer/shape.h
@@ -0,0 +1,25 @@
+#ifndef SHAPE_H
+#define SHAPE_H
+
+#include "../vertex.h"
+
+typedef struct
+{
+    GLuint num_indices;
+    GLuint vbo, ebo, vao;
+} shape_t;
+
+extern shape_t* Shape_MakeCube();
+extern shape_t* Shape_MakeArrow();
+extern shape_t* Shape_MakeQuad();
+
+extern shape_t* Shape_LoadOBJ(const char* path);
+
+extern shape_t* Shape_CreateFromRawData(vertex_t* vertices, GLsizeiptr vertexBufferSize,
+                                    GLushort* indices, GLsizeiptr indexBufferSize);
+
+extern void Shape_Free(shape_t* shape);
+
+
+
+#endif // SHAPE_H
diff --git a/07-july/src/terrain.c b/07-july/src/terrain.c
new file mode 100644
index 0000000..3bc66d2
--- /dev/null
+++ b/07-july/src/terrain.c
@@ -0,0 +1,163 @@
+#include "terrain.h"
+#include "math/math_util.h"
+#include "math/vector3f.h"
+#include "util/util.h"
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+#include <math.h>
+
+#define PLANE_SIZE 128
+#define PLANE_MAX_HEIGHT 10
+
+#define NUM_ARRAY_ELEMENTS(a) sizeof(a) / sizeof(*a)
+
+static float GetHeight(int x, int y, SDL_Surface* surface)
+{
+    if(x < 0 || x >= surface->w || y < 0 || y >= surface->h)
+        return 0.0f;
+
+    Uint32 pixel = ( (Uint32*)surface->pixels )[y * surface->w + x];
+    Uint8 r, g, b;
+    SDL_GetRGB(pixel, surface->format, &r, &g, &b);
+
+    float height = (float)r / 255.0f;
+
+    return height * 40.0f;
+}
+
+static vec3_t GenerateNomal(int x, int y, SDL_Surface* surface)
+{
+    float hLeft  = GetHeight(x-1, y, surface);
+    float hRight = GetHeight(x+1, y, surface);
+    float hUp    = GetHeight(x, y+1, surface);
+    float hDown  = GetHeight(x, y-1, surface);
+
+    vec3_t normal = { hLeft - hRight, 2.0f, hDown - hUp};
+    return vec3_normalize(&normal);
+}
+
+GLfloat Terrain_GetHeightOfTerrain(terrain_t* terrain, GLfloat x, GLfloat z)
+{
+    GLfloat terrainX = x - terrain->position.x;
+    GLfloat terrainZ = z - terrain->position.z;
+
+    GLfloat gridSquareSize = (float)terrain->l / ( (float)PLANE_SIZE - 1 );
+
+    GLint gridX = (GLint) floor(terrainX / gridSquareSize);
+    GLint gridZ = (GLint) floor(terrainZ / gridSquareSize);
+
+    if(gridX >= PLANE_SIZE - 1 || gridX < 0 || gridZ >= PLANE_SIZE - 1 || gridZ < 0)
+    {
+        printf("called\n");
+        return 0;
+    }
+
+    GLfloat xCoord = fmod(terrainX, gridSquareSize) / gridSquareSize;
+    GLfloat zCoord = fmod(terrainZ, gridSquareSize) / gridSquareSize;
+    GLfloat answer;
+
+    /* Determine in which triangle of the square are we. "Bary Centric Interpolation"*/
+    if(xCoord <= (1 - zCoord)){
+        /* 0, heights[gridX][gridZ], 0) */
+        vec3_t p1 = { 0, terrain->height[ gridX * PLANE_SIZE + gridZ ], 0 };
+        /* 1, heights[gridX + 1][gridZ], 0) */
+        vec3_t p2 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + gridZ ], 0};
+        /* 0, heights[gridX][gridZ + 1], 1) */
+        vec3_t p3 = { 0, terrain->height[ gridX * PLANE_SIZE + (gridZ + 1) ], 1};
+
+        vec2_t pos = {xCoord, zCoord};
+
+        answer = baryCentric(&p1, &p2, &p3, &pos);
+    } else {
+        /* (1, heights[gridX + 1][gridZ], 0) */
+        vec3_t p1 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + gridZ ], 0 };
+        /* (1, heights[gridX + 1][gridZ + 1], 1) */
+        vec3_t p2 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + (gridZ + 1) ], 1};
+        /* (0, heights[gridX][gridZ + 1], 1) */
+        vec3_t p3 = { 0, terrain->height[ gridX * PLANE_SIZE + (gridZ + 1) ], 1};
+        vec2_t pos = {xCoord, zCoord};
+
+        answer = baryCentric(&p1, &p2, &p3, &pos);
+    }
+
+    return answer;
+}
+
+terrain_t *Terrain_Create( int w, int l, const char* heightmap_path, texture_t *blendmap, TerrainTexturePack *textures )
+{
+    terrain_t *terrain = (terrain_t*) malloc( sizeof(terrain_t) );
+    terrain->height = (GLfloat*) malloc( sizeof(GLfloat) * PLANE_SIZE * PLANE_SIZE);
+
+    terrain->blendmap = blendmap;
+    terrain->w = w; terrain->l = l;
+    terrain->textures = *textures;
+
+    SDL_Surface* surface = IMG_Load(heightmap_path);
+    if(surface == NULL)
+        Util_FatalError("Heightmap file could not be loaded\n");
+
+    vertex_t data[PLANE_SIZE * PLANE_SIZE];
+    int x, y;
+    for(x = 0; x < PLANE_SIZE; x++)
+    {
+        for(y = 0; y < PLANE_SIZE; y++)
+        {
+            vertex_t* v = &data[y + x * PLANE_SIZE];
+            v->position = vec3_create( (float)x / (float)PLANE_SIZE, 0.0f, (float)y / (float)PLANE_SIZE);
+            /* Heightmap cordinates */
+            int image_x = v->position.x * surface->w, image_y = v->position.z * surface->h;
+
+            v->texCoord = vec2_create( v->position.x, v->position.z);
+            GLfloat height = GetHeight(image_x, image_y, surface);
+            terrain->height[y + x * PLANE_SIZE] = height;
+            v->position.y = height;
+            v->position.x *= w;
+            v->position.z *= l;
+
+            v->normal = GenerateNomal(image_x, image_y, surface);
+            color_t temp = {+1.0f, +0.0f, +0.0f, +1.0f};
+            v->color = temp;
+        }
+    }
+
+    int runner = 0;
+    GLushort indices[ (PLANE_SIZE-1) * (PLANE_SIZE-1) * 6 ];
+    for(x = 0; x < PLANE_SIZE-1; x++)
+    {
+        for(y = 0; y < PLANE_SIZE-1; y++)
+        {
+            indices[runner++] = PLANE_SIZE * x + y;
+            indices[runner++] = PLANE_SIZE * x + y + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE;
+
+            indices[runner++] = PLANE_SIZE * x + y + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE;
+        }
+    }
+
+    GLsizeiptr vertexBufferSize = NUM_ARRAY_ELEMENTS(data) * sizeof(vertex_t);
+    GLsizeiptr indexBufferSize = NUM_ARRAY_ELEMENTS(indices) * sizeof(GLushort);
+
+    SDL_FreeSurface(surface);
+
+    terrain->shape = Shape_CreateFromRawData(data, vertexBufferSize, indices, indexBufferSize);
+    return terrain;
+}
+
+void Terrain_Destroy( terrain_t* terrain )
+{
+    if(terrain->height)
+        free(terrain->height);
+
+    Shape_Free(terrain->shape);
+
+    int i;
+    for(i = 0; i < 4; i++)
+        Texture_Destroy(terrain->textures.texture[i]);
+
+    Texture_Destroy(terrain->blendmap);
+    free(terrain);
+}
+
diff --git a/07-july/src/terrain.h b/07-july/src/terrain.h
new file mode 100644
index 0000000..74e9f33
--- /dev/null
+++ b/07-july/src/terrain.h
@@ -0,0 +1,27 @@
+#ifndef TERRAIN_H
+#define TERRAIN_H
+
+#include "renderer/shape.h"
+#include "texture.h"
+
+typedef struct
+{
+    texture_t *texture[4];
+} TerrainTexturePack;
+
+typedef struct
+{
+    shape_t *shape;
+    texture_t *blendmap;
+    TerrainTexturePack textures;
+
+    GLfloat *height;
+    int w, l;
+    vec3_t position;
+} terrain_t;
+
+extern terrain_t *Terrain_Create( int w, int l, const char* heightmap_path, texture_t *blendmap, TerrainTexturePack *textures);
+extern GLfloat Terrain_GetHeightOfTerrain(terrain_t* terrain, GLfloat x, GLfloat z);
+extern void Terrain_Destroy( terrain_t *terrain );
+
+#endif // TERRAIN_H
diff --git a/07-july/src/texture.c b/07-july/src/texture.c
new file mode 100644
index 0000000..26fddde
--- /dev/null
+++ b/07-july/src/texture.c
@@ -0,0 +1,47 @@
+#include "texture.h"
+#include "util/util.h"
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+
+texture_t* Texture_Create( const char* path )
+{
+    texture_t* texture = (texture_t*) malloc( sizeof(texture_t) );
+    SDL_Surface* data = IMG_Load(path);
+    if(data == NULL)
+        Util_FatalError("Texture could not be found!\n");
+
+    glGenTextures(1, &texture->ID);
+    glBindTexture(GL_TEXTURE_2D, texture->ID);
+
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, data->w, data->h, GL_FALSE, GL_RGBA, GL_UNSIGNED_BYTE, data->pixels);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+
+    SDL_FreeSurface(data);
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    texture->width = data->w;
+    texture->height = data->h;
+
+    return texture;
+}
+
+void Texture_Bind(texture_t* texture)
+{
+    glBindTexture(GL_TEXTURE_2D, texture->ID);
+}
+
+void Texture_Unbind()
+{
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+void Texture_Destroy(texture_t* texture)
+{
+    glDeleteTextures(1, &texture->ID);
+    free(texture);
+}
diff --git a/07-july/src/texture.h b/07-july/src/texture.h
new file mode 100644
index 0000000..98048b5
--- /dev/null
+++ b/07-july/src/texture.h
@@ -0,0 +1,18 @@
+#ifndef TEXTURE_H
+#define TEXTURE_H
+
+#include <GL/glew.h>
+
+typedef struct
+{
+    GLuint ID;
+    GLuint width, height;
+} texture_t;
+
+extern texture_t* Texture_Create( const char* path );
+extern void Texture_Destroy( texture_t* texture );
+
+extern void Texture_Bind(texture_t* texture);
+extern void Texture_Unbind();
+
+#endif // TEXTURE_H
diff --git a/07-july/src/util/util.c b/07-july/src/util/util.c
new file mode 100644
index 0000000..fcdd665
--- /dev/null
+++ b/07-july/src/util/util.c
@@ -0,0 +1,49 @@
+#include "util.h"
+
+#include <SDL2/SDL.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+void Util_FatalError( const char* error )
+{
+    fprintf(stderr, "Fatal Error:\n%s", error);
+    SDL_Quit();
+    exit(1);
+}
+
+char* Util_LoadFile( const char* path )
+{
+	FILE* file = fopen( path, "r" );
+
+	if(file == NULL)
+    {
+        const char* temp = " could not be found\n";
+        size_t length = strlen(temp);
+        length += strlen(path);
+        char buffer[length];
+        strcpy(buffer, path);
+        strcat(buffer, temp);
+        Util_FatalError(buffer);
+    }
+
+	fseek( file, 0, SEEK_END );
+	size_t sizeOfFile = ftell( file );
+	fseek( file, 0, SEEK_SET );
+	char* file_data = (char*) malloc( sizeof(char)*sizeOfFile + 1 );
+	fread( file_data, sizeof(char), sizeOfFile, file );
+	file_data[sizeOfFile] = '\0';
+	fclose(file);
+	return file_data;
+}
+
+float Util_RandomF(float min, float max)
+{
+    return ( min + (float)rand() ) / ( (float)RAND_MAX / (max-min) );
+}
+
+int Util_RandomI(int min, int max)
+{
+    return ( rand()%(max-min) ) + min;
+}
diff --git a/07-july/src/util/util.h b/07-july/src/util/util.h
new file mode 100644
index 0000000..5f82f30
--- /dev/null
+++ b/07-july/src/util/util.h
@@ -0,0 +1,19 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#define toRadians(degrees) (degrees * 3.1415926 / 180.0f)
+#define toDegrees(radians) (radians * 180.0f / 3.1415926)
+
+#ifdef DEBUG
+#include <stdio.h>
+#define myAssert(expr) expr ? 1==1 : fprintf(stderr, "The expresion was not true\n")
+#else
+#define myAssert(expr)
+#endif // DEBUG
+
+extern void Util_FatalError( const char* error );
+extern char* Util_LoadFile( const char* path );
+extern float Util_RandomF(float min, float max);
+extern int Util_RandomI(int min, int max);
+
+#endif // UTIL_H
diff --git a/07-july/src/util/util_time.c b/07-july/src/util/util_time.c
new file mode 100644
index 0000000..b601379
--- /dev/null
+++ b/07-july/src/util/util_time.c
@@ -0,0 +1,52 @@
+#include "util_time.h"
+
+static struct
+{
+    float max_ticks_per_frame; //< cuantos ticks (tiempo demora) un frame
+    Uint32 counted_frames; //< cuantos frames han pasado
+    Uint32 start_ticks;    //< ticks al iniciar la iteracion del loop
+    Uint32 beg_ticks;      //< ticks desde el inicio del juego
+    Uint32 time_per_frame;
+} TIME = {
+    1000.0f / 60.0f,
+    0, 0, 0, 0
+};
+
+void Time_Init()
+{
+    TIME.beg_ticks = SDL_GetTicks();
+}
+
+void Time_Begin()
+{
+    TIME.start_ticks = SDL_GetTicks();
+}
+
+float Time_End()
+{
+    TIME.counted_frames += 1;
+    float FPS = TIME.counted_frames / ( (float)(SDL_GetTicks() - TIME.beg_ticks) / 1000.f );
+
+    float frameTicks = (float)(SDL_GetTicks() - TIME.start_ticks);
+    TIME.time_per_frame = frameTicks;
+    if(frameTicks < TIME.max_ticks_per_frame){
+        SDL_Delay( (Uint32)(TIME.max_ticks_per_frame - frameTicks) );
+    }
+
+    return FPS;
+}
+
+float Time_GetFrameTime()
+{
+    return (float)TIME.time_per_frame / 1000.0f;
+}
+
+void Time_SetMaxFramesPerSecond(Uint32 frames)
+{
+    TIME.max_ticks_per_frame = 1000.0f / (float)frames;
+}
+
+Uint32 Time_GetCountedFrames()
+{
+    return TIME.counted_frames;
+}
diff --git a/07-july/src/util/util_time.h b/07-july/src/util/util_time.h
new file mode 100644
index 0000000..3c3e470
--- /dev/null
+++ b/07-july/src/util/util_time.h
@@ -0,0 +1,13 @@
+#ifndef UTIL_TIME_H
+#define UTIL_TIME_H
+
+#include <SDL2/SDL.h>
+
+extern void Time_Init( void );
+extern void Time_Begin( void );
+extern float Time_End( void );
+extern void Time_SetMaxFramesPerSecond(Uint32 frames);
+extern float Time_GetFrameTime( void );
+extern Uint32 Time_GetCountedFrames( void );
+
+#endif // UTIL_TIME_H
diff --git a/07-july/src/vertex.h b/07-july/src/vertex.h
new file mode 100644
index 0000000..90152c8
--- /dev/null
+++ b/07-july/src/vertex.h
@@ -0,0 +1,21 @@
+#ifndef VERTEX_H
+#define VERTEX_H
+
+#include <GL/glew.h>
+#include "math/vector2f.h"
+#include "math/vector3f.h"
+
+typedef struct
+{
+    GLfloat r, g, b, a;
+} color_t;
+
+typedef struct
+{
+    vec3_t position;
+    color_t color;
+    vec2_t texCoord;
+    vec3_t normal;
+} vertex_t;
+
+#endif // VERTEX_H
diff --git a/08-august/Makefile b/08-august/Makefile
new file mode 100644
index 0000000..4619f3c
--- /dev/null
+++ b/08-august/Makefile
@@ -0,0 +1,20 @@
+SRC=$(wildcard src/*.c)\
+	$(wildcard src/math/*.c)\
+	$(wildcard src/graphics/*.c)\
+	$(wildcard src/renderer/*.c)\
+	$(wildcard src/util/*.c)
+OBJ=$(SRC:%.c=%.o)
+TARGET=game
+LDFLAGS=-lSDL2 -lGL -lGLEW -lm -lSDL2_image
+
+%.o : %.c
+	$(CC) -c $< -o $@
+
+$(TARGET) : $(OBJ)
+	$(CC) $(OBJ) -o $(TARGET) $(LDFLAGS)
+
+all : $(TARGET)
+
+.PHONY : clean
+clean:
+	rm -rf $(TARGET) $(OBJ)
diff --git a/08-august/resources/barrel.obj b/08-august/resources/barrel.obj
new file mode 100644
index 0000000..70b1ccc
--- /dev/null
+++ b/08-august/resources/barrel.obj
@@ -0,0 +1,4970 @@
+# Blender v2.67 (sub 0) OBJ File: 'Wooden Barrel.blend'
+# www.blender.org
+o Mesh_Mesh_Cylinder.001
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diff --git a/08-august/resources/crate.obj b/08-august/resources/crate.obj
new file mode 100644
index 0000000..5954600
--- /dev/null
+++ b/08-august/resources/crate.obj
@@ -0,0 +1,396 @@
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diff --git a/08-august/resources/plane3.obj b/08-august/resources/plane3.obj
new file mode 100644
index 0000000..b663241
--- /dev/null
+++ b/08-august/resources/plane3.obj
@@ -0,0 +1,55 @@
+# Blender v2.77 (sub 0) OBJ File: 'plane3.obj'
+# www.blender.org
+mtllib plane3.mtl
+o Cube.001
+v 8.045116 -0.023363 -8.045115
+v 8.045116 -0.023363 8.045116
+v -8.045117 -0.023363 8.045115
+v -8.045114 -0.023363 -8.045119
+v 8.045120 0.023363 -8.045112
+v -8.045115 0.023363 -8.045116
+v -8.045119 0.023363 8.045114
+v 8.045111 0.023363 8.045121
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 0.0000 1.0000
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+vt 0.0000 0.0000
+vt 1.0000 1.0000
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 1.0000 1.0000
+vt 1.0000 1.0000
+vt 1.0000 1.0000
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+vt 1.0000 1.0000
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+vn -0.0000 0.0000 1.0000
+vn -1.0000 -0.0000 -0.0000
+vn -1.0000 -0.0001 -0.0000
+vn 0.0000 0.0001 -1.0000
+usemtl Material.001
+s 1
+f 2/1/1 4/2/1 1/3/1
+f 6/4/2 8/5/2 5/6/2
+f 5/7/3 2/8/4 1/3/3
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+f 3/12/7 7/19/7 6/13/8
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diff --git a/08-august/resources/shaders/passShader.frag b/08-august/resources/shaders/passShader.frag
new file mode 100644
index 0000000..4c8dec1
--- /dev/null
+++ b/08-august/resources/shaders/passShader.frag
@@ -0,0 +1,13 @@
+#version 420
+
+in vec4 Fragment_Color;
+in vec2 Fragment_Uv;
+
+out vec4 out_color;
+
+uniform sampler2D Texture;
+
+void main()
+{
+    out_color = Fragment_Color * texture(Texture, Fragment_Uv);
+}
diff --git a/08-august/resources/shaders/passShader.vert b/08-august/resources/shaders/passShader.vert
new file mode 100644
index 0000000..c75a347
--- /dev/null
+++ b/08-august/resources/shaders/passShader.vert
@@ -0,0 +1,15 @@
+#version 420
+
+in layout(location=0) vec2 Model_Position;
+
+uniform mat4 M_totalTransform;
+
+out vec4 Fragment_Color;
+out vec2 Fragment_Uv;
+
+void main()
+{
+    Fragment_Color = vec4(1.0, 1.0, 1.0, 1.0);
+    Fragment_Uv = vec2( (Model_Position.x + 1.0)/2.0, 1.0 - (Model_Position.y + 1.0)/2.0 );
+	gl_Position = M_totalTransform * vec4(Model_Position, 0.0, 1.0);
+}
diff --git a/08-august/resources/shaders/shader.frag b/08-august/resources/shaders/shader.frag
new file mode 100644
index 0000000..42168d5
--- /dev/null
+++ b/08-august/resources/shaders/shader.frag
@@ -0,0 +1,58 @@
+#version 420
+
+in vec2 Fragment_UV;
+in vec4 Fragment_Color;
+in vec3 toLightVector[4];
+in vec3 toEyeVector;
+in vec3 tangent0;
+
+out vec4 out_color;
+
+uniform vec4 lightColor[4];
+uniform vec3 attenuation[4];
+uniform sampler2D Texture;
+uniform sampler2D normalMap;
+
+void main()
+{
+    vec4 totalDiffuse = vec4(0.0, 0.0, 0.0, 1.0);
+    vec4 totalSpecular = vec4(0.0, 0.0, 0.0, 1.0);
+
+    /* We get the normal from the normal map and we transform it into world space */
+    vec3 normal = normalize( (255.0 / 128.0 * texture(normalMap, Fragment_UV) - 1.0).xyz );
+
+    for(int i = 0; i < 4; i++)
+    {
+        /*Light Attenuation*/
+        float dist = length(toLightVector[i]);
+        float attFactor = attenuation[i].x + (attenuation[i].y * dist) + (attenuation[i].z * dist * dist);
+        vec3 unitToLightVector = normalize(toLightVector[i]);
+
+        /*Diffuse lighting*/
+
+        /*La intensidad es el cos entre la normal y el vector hacia la luz*/
+        float brightness = dot(unitToLightVector, normalize(normal));
+        /*No queremos luz negativa ni mayor a 1*/
+        brightness = max(brightness, 0.0);
+        totalDiffuse = totalDiffuse + (brightness * lightColor[i]) / attFactor;
+
+        /* Specular lighting */
+
+        /* Reflejamos el vector hacia la luz (su inverso) en la normal */
+        vec3 Vector_ReflectedLight = reflect(-unitToLightVector, normal);
+
+        /* La luz especular es el cos del angulo entre el vector hacia el ojo y la luz reflectada en la normal */
+        float specularity = clamp( dot(Vector_ReflectedLight, toEyeVector), 0, 1 );
+        float reflectivity = 0.5;
+        /* Que tan grande es el specular highlight */
+        specularity = pow(specularity, 10);
+        totalSpecular = totalSpecular + clamp( reflectivity * specularity * lightColor[i], 0, 1)  / attFactor;
+    }
+
+    /* Ambient Light */
+    totalDiffuse = max(totalDiffuse, 0.2);
+
+    /* Juntamos todo para el color final*/
+    out_color = totalDiffuse * texture(Texture, Fragment_UV) + totalSpecular;
+    out_color = vec4(tangent0, 1.0);
+}
diff --git a/08-august/resources/shaders/shader.vert b/08-august/resources/shaders/shader.vert
new file mode 100644
index 0000000..282ac62
--- /dev/null
+++ b/08-august/resources/shaders/shader.vert
@@ -0,0 +1,50 @@
+#version 420
+
+in layout(location=0) vec3 position;
+in layout(location=1) vec2 Texture_UV;
+in layout(location=2) vec3 normal;
+in layout(location=3) vec3 tangent;
+
+uniform mat4 M_MVP;   /* Total Transform matrix */
+uniform mat4 M_model; /* Model to world space transformation matrix */
+
+uniform vec3 lightPosition[4];
+uniform vec3 World_eyePosition;
+
+out vec2 Fragment_UV;
+out vec4 Fragment_Color;
+out vec3 toLightVector[4];
+out vec3 toEyeVector;
+out vec3 tangent0;
+
+void main()
+{
+    /*We add a 0 on the vec4 so we can remove the translation from the matrix
+	(WE DONT WANT THE NORMAL TO BE TRANSLATED) */
+	vec3 n = normalize( (M_model * vec4(normal, 0.0)).xyz );
+	vec3 t = normalize( (M_model * vec4(tangent, 0.0)).xyz );
+
+	/* Orthogonalization */
+	t = normalize(t - dot(t, n) * n);
+
+	vec3 biTangent = normalize( cross(t, n) );
+
+    /* Matrix use by normal mapping */
+	mat3 tbnMatrix = mat3(t, biTangent, n);
+	tbnMatrix = transpose(tbnMatrix);
+
+	vec3 World_Position = vec3(M_model * vec4(position, 1.0));
+
+    for(int i = 0; i < 4; i++)
+    {
+        /* vector que apunta hacia la luz*/
+        toLightVector[i] = tbnMatrix * (lightPosition[i] - World_Position);
+    }
+    /* Vector hacia el ojo*/
+    toEyeVector = normalize( tbnMatrix * (World_eyePosition - World_Position) );
+
+	gl_Position = M_MVP * vec4(position, 1.0);
+
+    Fragment_UV = vec2(Texture_UV.x, 1 - Texture_UV.y); /*Invert y axis*/
+    tangent0 = tangent;
+}
diff --git a/08-august/resources/shaders/skyboxShader.frag b/08-august/resources/shaders/skyboxShader.frag
new file mode 100644
index 0000000..99dcde3
--- /dev/null
+++ b/08-august/resources/shaders/skyboxShader.frag
@@ -0,0 +1,11 @@
+#version 420
+
+in vec3 Fragment_UV;
+out vec4 out_color;
+
+uniform samplerCube cubeMap;
+
+void main()
+{
+    out_color = texture(cubeMap, Fragment_UV);
+}
diff --git a/08-august/resources/shaders/skyboxShader.vert b/08-august/resources/shaders/skyboxShader.vert
new file mode 100644
index 0000000..3286875
--- /dev/null
+++ b/08-august/resources/shaders/skyboxShader.vert
@@ -0,0 +1,12 @@
+#version 420
+
+in layout(location=0) vec3 position; /* vertex position in model coordinates */
+out vec3 Fragment_UV;                /* UV coordinates for the fragment */
+
+uniform mat4 M_MVP;
+
+void main()
+{
+    gl_Position = M_MVP * vec4(position, 1.0);
+    Fragment_UV = position;
+}
diff --git a/08-august/resources/shaders/terrainShader.frag b/08-august/resources/shaders/terrainShader.frag
new file mode 100644
index 0000000..21623bb
--- /dev/null
+++ b/08-august/resources/shaders/terrainShader.frag
@@ -0,0 +1,72 @@
+#version 420
+
+in vec2 Fragment_UV;
+in vec3 normal0;
+in vec3 toLightVector[4];
+in vec3 toEyeVector;
+
+out vec4 out_color;
+
+uniform vec4 lightColor[4];
+uniform vec3 attenuation[4];
+uniform vec3 World_eyePosition;
+
+uniform sampler2D Texture_Background;
+uniform sampler2D Texture_R;
+uniform sampler2D Texture_G;
+uniform sampler2D Texture_B;
+uniform sampler2D Texture_BlendMap;
+
+void main()
+{
+    vec4 totalDiffuse = vec4(0.0, 0.0, 0.0, 1.0);
+    vec4 totalSpecular = vec4(0.0, 0.0, 0.0, 1.0);
+
+    for(int i = 0; i < 4; i++)
+    {
+        /*Light Attenuation*/
+        float dist = length(toLightVector[i]);
+        float attFactor = attenuation[i].x + (attenuation[i].y * dist) + (attenuation[i].z * dist * dist);
+        vec3 unitToLightVector = normalize(toLightVector[i]);
+        /*Diffuse lighting*/
+
+        /*La intensidad es el cos entre la normal y el vector hacia la luz*/
+        float brightness = dot(unitToLightVector, normalize(normal0));
+        /*No queremos luz negativa ni mayor a 1*/
+        brightness = max(brightness, 0.0);
+        totalDiffuse = totalDiffuse + (brightness * lightColor[i]) / attFactor;
+
+        /* Specular lighting */
+
+        /* Reflejamos el vector hacia la luz (su inverso) en la normal */
+        vec3 Vector_ReflectedLight = reflect(-unitToLightVector, normal0);
+
+        /* La luz especular es el cos del angulo entre el vector hacia el ojo y la luz reflectada en la normal */
+        float specularity = clamp( dot(Vector_ReflectedLight, toEyeVector), 0, 1 );
+        float reflectivity = 0.5;
+        /* Que tan grande es el specular highlight */
+        specularity = pow(specularity, 10);
+        totalSpecular = totalSpecular + clamp( reflectivity * specularity * lightColor[i], 0, 1) / attFactor;
+    }
+
+    /* Ambient Light */
+    totalDiffuse = max(totalDiffuse, 0.2);
+
+    /*Terrain color*/
+    /*The color of the current fragment from the blendmap*/
+    vec4 blendMapColor = texture(Texture_BlendMap, Fragment_UV);
+    /*We want the background color when we have black in the blend map*/
+    float backTextureAmount = 1 - (blendMapColor.r + blendMapColor.g + blendMapColor.b);
+    /*So we dont lose image quality from the tiles textures (Fragment_UV make the terrain look less HD)*/
+    vec2 Tiled_UV = Fragment_UV * 50.0f;
+    /*We get the color of each map tile (soil1, soil2, etc)*/
+    vec4 backgroundTextureColor = texture(Texture_Background, Tiled_UV) * backTextureAmount;
+    vec4 rTextureColor = texture(Texture_R, Tiled_UV) * blendMapColor.r;
+    vec4 gTextureColor = texture(Texture_G, Tiled_UV) * blendMapColor.g;
+    vec4 bTextureColor = texture(Texture_B, Tiled_UV) * blendMapColor.b;
+    /*We mix them corresponding with the blendmap*/
+    vec4 totalColor = backgroundTextureColor + rTextureColor + gTextureColor + bTextureColor;
+
+    /*Our final color for the fragment*/
+    out_color =  totalDiffuse * totalColor + totalSpecular;
+}
diff --git a/08-august/resources/shaders/terrainShader.vert b/08-august/resources/shaders/terrainShader.vert
new file mode 100644
index 0000000..1850947
--- /dev/null
+++ b/08-august/resources/shaders/terrainShader.vert
@@ -0,0 +1,39 @@
+#version 420
+
+in layout(location=0) vec3 position; /* vertex position in model space */
+in layout(location=1) vec2 Texture_UV;
+in layout(location=2) vec3 normal;   /* vertex normal in model space */
+in layout(location=3) vec3 tangent;
+
+uniform mat4 M_MVP;     /* Total Transform matrix */
+uniform mat4 M_model;   /* Model to world space transformation matrix */
+
+uniform vec3 lightPosition[4];
+uniform vec3 World_eyePosition;
+
+out vec2 Fragment_UV;               /* UV coordinates for the fragment */
+out vec3 normal0;
+out vec4 Fragment_Color;
+out vec3 toLightVector[4];
+out vec3 toEyeVector;
+
+void main()
+{
+    vec3 World_Position = vec3(M_model * vec4(position, 1.0));
+
+    for(int i = 0; i < 4; i++)
+    {
+        /* vector que apunta hacia la luz*/
+        toLightVector[i] = lightPosition[i] - World_Position;
+    }
+    /* Vector hacia el ojo*/
+    toEyeVector = normalize(World_eyePosition - World_Position);
+
+	gl_Position = M_MVP * vec4(position, 1.0);
+
+	Fragment_UV = vec2(Texture_UV.x, 1 - Texture_UV.y); /*Invert y axis*/
+
+	/*We add a 0 on the vec4 so we can remove the translation from the matrix
+	(WE DONT WANT THE NORMAL TO BE TRANSLATED) */
+	normal0 = normalize( (M_model * vec4(normal, 0.0)).xyz );
+}
diff --git a/08-august/resources/stall.obj b/08-august/resources/stall.obj
new file mode 100644
index 0000000..210f90b
--- /dev/null
+++ b/08-august/resources/stall.obj
@@ -0,0 +1,1696 @@
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diff --git a/08-august/resources/textures/back.png b/08-august/resources/textures/back.png
new file mode 100644
index 0000000..3fd0158
--- /dev/null
+++ b/08-august/resources/textures/back.png
diff --git a/08-august/resources/textures/barrel.png b/08-august/resources/textures/barrel.png
new file mode 100644
index 0000000..baf502b
--- /dev/null
+++ b/08-august/resources/textures/barrel.png
diff --git a/08-august/resources/textures/blendmap.png b/08-august/resources/textures/blendmap.png
new file mode 100644
index 0000000..4789845
--- /dev/null
+++ b/08-august/resources/textures/blendmap.png
diff --git a/08-august/resources/textures/bottom.png b/08-august/resources/textures/bottom.png
new file mode 100644
index 0000000..8f9c0f2
--- /dev/null
+++ b/08-august/resources/textures/bottom.png
diff --git a/08-august/resources/textures/boulder.png b/08-august/resources/textures/boulder.png
new file mode 100644
index 0000000..e2cb9d1
--- /dev/null
+++ b/08-august/resources/textures/boulder.png
diff --git a/08-august/resources/textures/boulderNormal.png b/08-august/resources/textures/boulderNormal.png
new file mode 100644
index 0000000..cc6069a
--- /dev/null
+++ b/08-august/resources/textures/boulderNormal.png
diff --git a/08-august/resources/textures/bricks2.png b/08-august/resources/textures/bricks2.png
new file mode 100644
index 0000000..cf44650
--- /dev/null
+++ b/08-august/resources/textures/bricks2.png
diff --git a/08-august/resources/textures/bricks2_normal.png b/08-august/resources/textures/bricks2_normal.png
new file mode 100644
index 0000000..72b6a2d
--- /dev/null
+++ b/08-august/resources/textures/bricks2_normal.png
diff --git a/08-august/resources/textures/default_normal_map.png b/08-august/resources/textures/default_normal_map.png
new file mode 100644
index 0000000..9dfd3a4
--- /dev/null
+++ b/08-august/resources/textures/default_normal_map.png
diff --git a/08-august/resources/textures/front.png b/08-august/resources/textures/front.png
new file mode 100644
index 0000000..fbff722
--- /dev/null
+++ b/08-august/resources/textures/front.png
diff --git a/08-august/resources/textures/heightmap.png b/08-august/resources/textures/heightmap.png
new file mode 100644
index 0000000..12741e5
--- /dev/null
+++ b/08-august/resources/textures/heightmap.png
diff --git a/08-august/resources/textures/left.png b/08-august/resources/textures/left.png
new file mode 100644
index 0000000..374322a
--- /dev/null
+++ b/08-august/resources/textures/left.png
diff --git a/08-august/resources/textures/normal_map.png b/08-august/resources/textures/normal_map.png
new file mode 100644
index 0000000..d96a41c
--- /dev/null
+++ b/08-august/resources/textures/normal_map.png
diff --git a/08-august/resources/textures/right.png b/08-august/resources/textures/right.png
new file mode 100644
index 0000000..89fbb5f
--- /dev/null
+++ b/08-august/resources/textures/right.png
diff --git a/08-august/resources/textures/soil1.png b/08-august/resources/textures/soil1.png
new file mode 100644
index 0000000..227e96c
--- /dev/null
+++ b/08-august/resources/textures/soil1.png
diff --git a/08-august/resources/textures/soil2.png b/08-august/resources/textures/soil2.png
new file mode 100644
index 0000000..5fc40e2
--- /dev/null
+++ b/08-august/resources/textures/soil2.png
diff --git a/08-august/resources/textures/soil3.png b/08-august/resources/textures/soil3.png
new file mode 100644
index 0000000..2c1c431
--- /dev/null
+++ b/08-august/resources/textures/soil3.png
diff --git a/08-august/resources/textures/soil4.png b/08-august/resources/textures/soil4.png
new file mode 100644
index 0000000..8d3a4d3
--- /dev/null
+++ b/08-august/resources/textures/soil4.png
diff --git a/08-august/resources/textures/stall.png b/08-august/resources/textures/stall.png
new file mode 100644
index 0000000..d4d6f6e
--- /dev/null
+++ b/08-august/resources/textures/stall.png
diff --git a/08-august/resources/textures/top.png b/08-august/resources/textures/top.png
new file mode 100644
index 0000000..f92e8f7
--- /dev/null
+++ b/08-august/resources/textures/top.png
diff --git a/08-august/src/camera.c b/08-august/src/camera.c
new file mode 100644
index 0000000..545ac85
--- /dev/null
+++ b/08-august/src/camera.c
@@ -0,0 +1,85 @@
+#include "camera.h"
+
+#include "util/util_time.h"
+
+static const float movementSpeed = 40.0f;
+
+void Camera_Init(camera_t* camera)
+{
+    camera->position = (vec3_t){ 4.0f, 40.0f, 4.0f };
+    camera->viewDirection = (vec3_t){ -1.0f, -1.0f, 0.0f };
+    camera->needsUpdate = true;
+    camera->up = (vec3_t){ 0.0f, 1.0f, 0.0f };
+}
+
+void Camera_Move_Up(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->up, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_Move_Down(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->up, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_Move_Left(camera_t* camera)
+{
+    vec3_t strafeDirection = vec3_cross_mul(&camera->viewDirection, &camera->up);
+    strafeDirection = vec3_scalar_mul(&strafeDirection, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &strafeDirection);
+}
+
+void Camera_Move_Right(camera_t* camera)
+{
+    vec3_t strafeDirection = vec3_cross_mul(&camera->viewDirection, &camera->up);
+    strafeDirection = vec3_scalar_mul(&strafeDirection, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &strafeDirection);
+}
+
+void Camera_Move_Foward(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->viewDirection, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_Move_Backward(camera_t* camera)
+{
+    vec3_t temp = vec3_scalar_mul(&camera->viewDirection, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void Camera_MouseUpdate(camera_t* camera, const vec2_t* newMousePosition)
+{
+    vec2_t mouseDelta = vec2_sub(newMousePosition, &camera->mousePosition);
+
+    /* El if evita que el mouse se teletrasporte al cambiar de posicion muy rapido */
+    if(vec2_length(&mouseDelta) > 50.0f){
+        camera->mousePosition = *newMousePosition;
+        return;
+    }
+
+    vec3_t verticalRotation = vec3_cross_mul(&camera->viewDirection, &camera->up);
+
+    mat4_t temp = mat4_rotate(mouseDelta.x * -0.5f, &camera->up);
+
+    camera->viewDirection = mat4_mul_vec3(&temp, &camera->viewDirection);
+
+    temp = mat4_rotate(mouseDelta.y * -0.5f, &verticalRotation);
+    camera->viewDirection = mat4_mul_vec3(&temp, &camera->viewDirection);
+
+    camera->mousePosition = *newMousePosition;
+
+    camera->needsUpdate = true;
+}
+
+mat4_t Camera_GetModelToViewMatrix(camera_t* camera)
+{
+    if(camera->needsUpdate)
+    {
+        vec3_t temp = vec3_add(&camera->position, &camera->viewDirection);
+        camera->viewMatrix = mat4_lookAt(&camera->position, &temp, &camera->up);
+    }
+    return camera->viewMatrix;
+}
diff --git a/08-august/src/camera.h b/08-august/src/camera.h
new file mode 100644
index 0000000..384bee8
--- /dev/null
+++ b/08-august/src/camera.h
@@ -0,0 +1,32 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include "math/matrix4x4.h"
+#include "math/vector3f.h"
+#include "math/vector2f.h"
+#include <stdbool.h>
+
+typedef struct
+{
+    vec3_t position;
+    vec3_t viewDirection;
+    vec3_t up;
+    mat4_t projectionMatrix;
+    mat4_t viewMatrix;
+    vec2_t mousePosition;
+    bool needsUpdate;
+} camera_t;
+
+extern void Camera_Init(camera_t* camera);
+extern void Camera_Move_Up(camera_t* camera);
+extern void Camera_Move_Down(camera_t* camera);
+extern void Camera_Move_Left(camera_t* camera);
+extern void Camera_Move_Right(camera_t* camera);
+extern void Camera_Move_Foward(camera_t* camera);
+extern void Camera_Move_Backward(camera_t* camera);
+extern void Camera_MouseUpdate(camera_t* camera, const vec2_t* newMousePosition);
+
+/* Consigue la viewMatrix */
+extern mat4_t Camera_GetModelToViewMatrix(camera_t* camera);
+
+#endif // CAMERA_H
diff --git a/08-august/src/game.h b/08-august/src/game.h
new file mode 100644
index 0000000..611bd07
--- /dev/null
+++ b/08-august/src/game.h
@@ -0,0 +1,46 @@
+#ifndef GAME_H
+#define GAME_H
+
+#include "camera.h"
+#include "graphics/window.h"
+#include "renderer/entity.h"
+#include "player.h"
+#include "terrain.h"
+#include "texture.h"
+#include "renderer/shape.h"
+#include "graphics/shaders.h"
+#include "renderer/skybox.h"
+
+typedef enum
+{
+    MENU,
+    RUNNING,
+    EXIT
+}GameState_t;
+
+#define NUM_ENTITIES 1
+
+#define WINDOW_WIDTH  1024
+#define WINDOW_HEIGHT 768
+#define WINDOW_ASPECT_RATIO ( (float)WINDOW_WIDTH / (float)WINDOW_HEIGHT )
+
+typedef struct
+{
+    GameState_t gameState;
+    Shader_Layout shaderProgram, terrainProgram, skyboxProgram;
+
+    entity_t ents[NUM_ENTITIES];
+    shape_t *entsShape;
+    GLuint entsTexture;
+    GLuint normalMap;
+    GLuint defaultNormalMap;
+    terrain_t *terrain;
+    skybox_t sky;
+
+    player_t player;
+
+    camera_t camera;
+    window_t *window;
+} game_t;
+
+#endif // GAME_H
diff --git a/08-august/src/graphics/shaders.c b/08-august/src/graphics/shaders.c
new file mode 100644
index 0000000..c0796e1
--- /dev/null
+++ b/08-august/src/graphics/shaders.c
@@ -0,0 +1,135 @@
+#include "shaders.h"
+#include "../util/util.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
+
+static void CompileShader(const char *source, GLuint shaderID)
+{
+    glShaderSource(shaderID, 1, &source, 0);
+    glCompileShader(shaderID);
+    GLint error;
+    glGetShaderiv(shaderID, GL_COMPILE_STATUS, &error);
+    if(error != GL_TRUE)
+    {
+        GLint logLenth;
+        glGetShaderiv(shaderID, GL_INFO_LOG_LENGTH, &logLenth);
+        GLchar buffer[logLenth];
+        glGetShaderInfoLog(shaderID, logLenth, &logLenth, buffer);
+        glDeleteShader(shaderID);
+        Util_FatalError("Some shader failed to compile:\n%s", buffer);
+    }
+}
+
+
+GLuint Shader_CompileShaders(const char* vertexShader, const char* fragmentShader)
+{
+    char* vertexShaderSource = Util_LoadFile(vertexShader);
+    char* fragmentShaderSource = Util_LoadFile(fragmentShader);
+
+    GLuint vs = 0, fs = 0, program;
+    vs = glCreateShader(GL_VERTEX_SHADER);
+    fs = glCreateShader(GL_FRAGMENT_SHADER);
+
+    if(vs == 0 || fs == 0)
+        Util_FatalError("Shaders could not be created\n");
+
+    program = glCreateProgram();
+
+    CompileShader(vertexShaderSource, vs);
+    CompileShader(fragmentShaderSource, fs);
+
+    glAttachShader(program, vs);
+    glAttachShader(program, fs);
+
+    glLinkProgram(program);
+
+    GLint error;
+    glGetProgramiv(program, GL_LINK_STATUS, &error);
+
+    if(error != GL_TRUE)
+    {
+        GLint logLength;
+        glGetProgramiv(program, GL_INFO_LOG_LENGTH, &logLength);
+
+        GLchar buffer[logLength];
+        glGetProgramInfoLog(program, logLength, &logLength, buffer);
+
+        glDeleteProgram(program);
+        glDeleteShader(vs);
+        glDeleteShader(fs);
+
+        Util_FatalError("Shader program failed to link!:\n%s", buffer);
+    }
+
+    glDetachShader(program, vs);
+    glDetachShader(program, fs);
+    glDeleteShader(vs);
+    glDeleteShader(fs);
+
+    free(vertexShaderSource);
+    free(fragmentShaderSource);
+
+    return program;
+}
+
+GLint Shader_GetUniformLocation( GLuint programID, const char* uniformName )
+{
+    GLint u = glGetUniformLocation(programID, uniformName);
+    if(u == GL_INVALID_INDEX);
+        //Util_FatalError("Uniform \"%s\" could not be found!", uniformName);
+    else
+        return u;
+
+    return 0;
+}
+
+GLint Shader_GetAttribLocation ( GLuint programID, const char* attributeName )
+{
+    GLint attrLocation = glGetAttribLocation(programID, attributeName);
+    if(attrLocation < 0)
+        Util_FatalError("Attribute \"%s\" could not be found!\n", attributeName);
+    return attrLocation;
+}
+
+void Shader_Destroy(GLuint programID)
+{
+    glUseProgram(0);
+    glDeleteProgram(programID);
+}
+
+void Shader_SetUniformMat4( GLuint programID, const char* name, const float *matrix )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniformMatrix4fv(location, 1, GL_FALSE, matrix);
+}
+
+void Shader_SetUniformFloat( GLuint programID, const char* name, const float val )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform1f(location, val);
+}
+
+void Shader_SetUniformVec2( GLuint programID, const char* name, const float vec[2] )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform2fv(location, 1, vec);
+}
+
+void Shader_SetUniformVec3( GLuint programID, const char* name, const float vec[3] )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform3fv(location, 1, vec);
+}
+
+void Shader_SetUniformVec4( GLuint programID, const char* name, const float vec[4] )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform4fv(location, 1, vec);
+}
+
+void Shader_SetUniformInt( GLuint programID, const char* name, const int val )
+{
+    GLint location = Shader_GetUniformLocation(programID, name);
+    glUniform1i(location, val);
+}
diff --git a/08-august/src/graphics/shaders.h b/08-august/src/graphics/shaders.h
new file mode 100644
index 0000000..db090fd
--- /dev/null
+++ b/08-august/src/graphics/shaders.h
@@ -0,0 +1,51 @@
+#ifndef SHADERS_H
+#define SHADERS_H
+
+#include <GL/glew.h>
+
+#include "../math/matrix4x4.h"
+
+typedef struct
+{
+    /* Program ID */
+    GLuint ID;
+
+    /* Program Attributes */
+    GLint position;
+    GLint color;
+    GLint uv;
+    GLint normal;
+
+    /* Program Uniforms */
+    GLint totalTransform;
+    GLint modelToWorld;
+    GLint lightPosition;
+    GLint ambientLight;
+    GLint lightColor;
+    GLint lightAttenuation;
+    GLint World_eyePosition;
+    GLint Texture;
+    GLint Normal_Map;
+
+    /* Program Multi Purpose Uniforms */
+    GLint extra0;
+    GLint extra1;
+    GLint extra2;
+    GLint extra3;
+    GLint extra4;
+    GLint extra5;
+} Shader_Layout;
+
+extern GLuint Shader_CompileShaders(const char* vertexShader, const char* fragmentShader);
+extern GLint Shader_GetUniformLocation( GLuint programID, const char* uniformName );
+extern GLint Shader_GetAttribLocation ( GLuint programID, const char* attributeName );
+extern void Shader_Destroy(GLuint programID);
+
+extern void Shader_SetUniformMat4( GLuint programID, const char* name, const float *matrix );
+extern void Shader_SetUniformFloat( GLuint programID, const char* name, const float val );
+extern void Shader_SetUniformVec2( GLuint programID, const char* name, const float vec[2] );
+extern void Shader_SetUniformVec3( GLuint programID, const char* name, const float vec[3] );
+extern void Shader_SetUniformVec4( GLuint programID, const char* name, const float vec[4] );
+extern void Shader_SetUniformInt( GLuint programID, const char* name, const int val );
+
+#endif // SHADERS_H
diff --git a/08-august/src/graphics/window.c b/08-august/src/graphics/window.c
new file mode 100644
index 0000000..1a942ca
--- /dev/null
+++ b/08-august/src/graphics/window.c
@@ -0,0 +1,44 @@
+#include "window.h"
+#include "../util/util.h"
+#include <stdlib.h>
+
+window_t* Window_Create(const char* title, Uint32 width, Uint32 height)
+{
+    window_t* window = (window_t*) malloc(sizeof(window_t));
+    window->title = title;
+    window->Width = width;
+    window->Height = height;
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+    window->window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
+                                      width, height, SDL_WINDOW_OPENGL);
+    if(window->window == NULL)
+        Util_FatalError( "The window could not be created:\n%s", SDL_GetError() );
+
+    window->context = SDL_GL_CreateContext(window->window);
+
+    if(window->context == NULL)
+        Util_FatalError( "Context could not be created:\n%s", SDL_GetError() );
+
+    glViewport(0, 0, width, height);
+    return window;
+}
+
+void Window_Resize(window_t* window, Uint32 width, Uint32 height)
+{
+    window->Width = width;
+    window->Height = height;
+    SDL_SetWindowSize(window->window, width, height);
+    glViewport(0, 0, width, height);
+}
+
+void Window_Update(window_t* window)
+{
+    SDL_GL_SwapWindow(window->window);
+}
+
+void Window_Destroy(window_t* window)
+{
+    SDL_GL_DeleteContext(window->context);
+    SDL_DestroyWindow(window->window);
+    free(window);
+}
diff --git a/08-august/src/graphics/window.h b/08-august/src/graphics/window.h
new file mode 100644
index 0000000..1e71a83
--- /dev/null
+++ b/08-august/src/graphics/window.h
@@ -0,0 +1,20 @@
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <SDL2/SDL.h>
+#include <GL/glew.h>
+
+typedef struct
+{
+    SDL_Window* window;
+    SDL_GLContext context;
+    Uint32 Width, Height;
+    const char* title;
+} window_t;
+
+extern window_t* Window_Create(const char* title, Uint32 width, Uint32 height);
+extern void Window_Resize(window_t* window, Uint32 width, Uint32 height);
+extern void Window_Update(window_t* window);
+extern void Window_Destroy(window_t* window);
+
+#endif // WINDOW_H
diff --git a/08-august/src/gui/gui_renderer.c b/08-august/src/gui/gui_renderer.c
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/08-august/src/gui/gui_renderer.c
diff --git a/08-august/src/gui/gui_renderer.h b/08-august/src/gui/gui_renderer.h
new file mode 100644
index 0000000..2c1b57f
--- /dev/null
+++ b/08-august/src/gui/gui_renderer.h
@@ -0,0 +1,9 @@
+#ifndef GUI_RENDERER_H
+#define GUI_RENDERER_H
+
+extern void gui_renderer_init();
+extern void gui_renderer_submit(widget *widget);
+extern void gui_renderer_quit();
+
+
+#endif // GUI_RENDERER_H
diff --git a/08-august/src/gui/widget.c b/08-august/src/gui/widget.c
new file mode 100644
index 0000000..9ed00f7
--- /dev/null
+++ b/08-august/src/gui/widget.c
@@ -0,0 +1,17 @@
+#include "widget.h"
+#include <stdlib.h>
+
+widget_t *Widget_CreateImage(texture_t *texture, int x, int y, int w, int h)
+{
+    widget_t *widget = (widget_t *) malloc( sizeof(widget_t) );
+    *widget = (widget_t){ x, y, w, h, 0, texture };
+
+    glGenBuffers(1, &widget->vbo);
+    glBindBuffer(GL_ARRAY_BUFFER, widget->vbo);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * 4, NULL, GL_DYNAMIC_DRAW);
+}
+
+void Widget_Destroy(widget_t *widget)
+{
+    free(widget);
+}
diff --git a/08-august/src/gui/widget.h b/08-august/src/gui/widget.h
new file mode 100644
index 0000000..91fc4c4
--- /dev/null
+++ b/08-august/src/gui/widget.h
@@ -0,0 +1,13 @@
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include "GL/glew.h"
+#include "../texture.h"
+
+typedef struct
+{
+    int x, y, w, h;
+    texture_t *texture;
+} widget_t;
+
+#endif // WIDGET_H
diff --git a/08-august/src/input.c b/08-august/src/input.c
new file mode 100644
index 0000000..8384ceb
--- /dev/null
+++ b/08-august/src/input.c
@@ -0,0 +1,21 @@
+#include "input.h"
+
+static bool key_buffer[MAX_KEY_BUFFER_SIZE] = { false };
+
+void Input_PressKey(unsigned int key)
+{
+    if(key > 256 || key < 0) return;
+    key_buffer[key] = true;
+}
+
+void Input_ReleaseKey(unsigned int key)
+{
+    if(key > 256 || key < 0) return;
+    key_buffer[key] = false;
+}
+
+bool Input_isKeyPressed(unsigned int key)
+{
+    if(key > 256 || key < 0) return false;
+    return key_buffer[key];
+}
diff --git a/08-august/src/input.h b/08-august/src/input.h
new file mode 100644
index 0000000..92876ca
--- /dev/null
+++ b/08-august/src/input.h
@@ -0,0 +1,11 @@
+#ifndef INPUT_H
+#define INPUT_H
+
+#include <stdbool.h>
+#define MAX_KEY_BUFFER_SIZE 256
+
+void Input_PressKey(unsigned int key);
+void Input_ReleaseKey(unsigned int key);
+bool Input_isKeyPressed(unsigned int key);
+
+#endif // INPUT_H
diff --git a/08-august/src/light.c b/08-august/src/light.c
new file mode 100644
index 0000000..decd182
--- /dev/null
+++ b/08-august/src/light.c
@@ -0,0 +1 @@
+#include "light.h"
diff --git a/08-august/src/light.h b/08-august/src/light.h
new file mode 100644
index 0000000..afc8eda
--- /dev/null
+++ b/08-august/src/light.h
@@ -0,0 +1,13 @@
+#ifndef LIGHT_H
+#define LIGHT_H
+
+#include "vertex.h"
+
+typedef struct
+{
+    vec3_t position;
+    vec4_t color;
+    vec3_t attenuation;
+} light_t;
+
+#endif // LIGHT_H
diff --git a/08-august/src/main.c b/08-august/src/main.c
new file mode 100644
index 0000000..41fc253
--- /dev/null
+++ b/08-august/src/main.c
@@ -0,0 +1,290 @@
+#include "game.h"
+#include "math/vector3f.h"
+#include "math/vector2f.h"
+#include "math/matrix4x4.h"
+#include "input.h"
+#include "util/util.h"
+#include "util/util_time.h"
+#include "light.h"
+#include "renderer/renderer.h"
+#include <SDL2/SDL.h>
+
+/**
+    TODO:   Shadows
+            Texture Atlases
+            Memory management
+
+            +improve skybox
+            |
+            +->fog
+            +->day/night
+
+            +mouse picking (is it working perfectly?)
+
+            +add cell shading?
+
+            improve math package
+            repair gui on renderer.c
+            improve shape loading (tangent generation) (normal generation)
+            improve normal mapping
+**/
+
+void LoadResources(game_t *game);
+void Draw(game_t *game);
+void ProcessInput(game_t *game);
+void CleanUp(game_t *game);
+
+int main(int argc, char *argv[])
+{
+    SDL_Init(SDL_INIT_EVERYTHING);
+
+    game_t game;
+    game.gameState = RUNNING;
+    game.window = Window_Create("Test", WINDOW_WIDTH, WINDOW_HEIGHT);
+
+	GLenum err = glewInit();
+    if(err != GLEW_OK) {
+		fputs(glewGetErrorString(err), stderr);
+        Util_FatalError("Glew could no be started!");
+	}
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_CULL_FACE);
+    glCullFace(GL_BACK);
+    SDL_GL_SetSwapInterval(1);
+    // glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+
+    game.shaderProgram.ID = Shader_CompileShaders("resources/shaders/shader.vert",
+                                                  "resources/shaders/shader.frag");
+
+    game.terrainProgram.ID = Shader_CompileShaders("resources/shaders/terrainShader.vert",
+                                                   "resources/shaders/terrainShader.frag");
+
+    game.skyboxProgram.ID = Shader_CompileShaders("resources/shaders/skyboxShader.vert",
+                                                  "resources/shaders/skyboxShader.frag");
+    glUseProgram(game.shaderProgram.ID);
+
+    Camera_Init(&game.camera);
+    game.camera.projectionMatrix = mat4_perspective(60.0f, WINDOW_ASPECT_RATIO, 0.1f, 900.0f);
+
+    LoadResources(&game);
+    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+
+    Time_Init();
+    Time_SetMaxFramesPerSecond(60);
+    while(game.gameState != EXIT)
+    {
+        Time_Begin();
+        ProcessInput(&game);
+        Player_Update(&game.player, game.terrain);
+        Draw(&game);
+
+        float FPS = Time_End();
+
+        if( !( Time_GetCountedFrames() % (int)FPS ) )
+            fprintf(stderr, "FPS: %.4f\n", FPS);
+    }
+
+    Window_Destroy(game.window);
+    CleanUp(&game);
+    SDL_Quit();
+    return 0;
+}
+
+void CleanUp(game_t *game)
+{
+    Shape_Free(game->entsShape);
+    Shape_Free(game->sky.cube);
+
+    Texture_Destroy(game->entsTexture);
+    Texture_Destroy(game->sky.texture);
+
+    Texture_Destroy(game->normalMap);
+    Texture_Destroy(game->defaultNormalMap);
+
+    Terrain_Destroy(game->terrain);
+
+    Shader_Destroy(game->shaderProgram.ID);
+    Shader_Destroy(game->terrainProgram.ID);
+    Shader_Destroy(game->skyboxProgram.ID);
+
+    Render_Quit();
+}
+
+void LoadResources(game_t *game)
+{
+    Render_Init();
+    Uint32 start = SDL_GetTicks();
+
+    game->entsShape = Shape_LoadOBJ("resources/barrel.obj");
+    game->entsTexture = Texture_Create2D("resources/textures/barrel.png");
+
+    Player_Init(&game->player);
+    game->player.entity.texture = game->entsTexture;
+    game->player.entity.shape = game->entsShape;
+
+    {
+        vec3_t position = { 0.0f, 3.0f, 0.0f };
+        float rotation[3] = { 0.0f, 0.0f, 0.0f };
+        game->ents[0].position = position;
+        game->ents[0].rotX = rotation[0];
+        game->ents[0].rotY = rotation[1];
+        game->ents[0].rotZ = rotation[2];
+        game->ents[0].shape = game->entsShape;
+        game->ents[0].texture = game->entsTexture;
+    }
+
+    {
+        vec3_t position = { -400.0f, 0.0f, -400.0f };
+        GLuint blendmap = Texture_Create2D("resources/textures/blendmap.png");
+        TerrainTexturePack pack =
+        {
+            {
+                Texture_Create2D("resources/textures/soil1.png"),
+                Texture_Create2D("resources/textures/soil2.png"),
+                Texture_Create2D("resources/textures/soil4.png"),
+                Texture_Create2D("resources/textures/soil3.png"),
+            }
+        };
+        game->terrain = Terrain_Create(800, 800, "resources/textures/heightmap.png", blendmap, &pack);
+        game->terrain->position = position;
+    }
+
+    {
+        game->sky.rotation = 0.0f;
+        game->sky.cube = Shape_MakeSkyBox(500.0f);
+        const char *paths[6] =
+        {
+            "resources/textures/right.png",
+            "resources/textures/left.png",
+            "resources/textures/top.png",
+            "resources/textures/bottom.png",
+            "resources/textures/back.png",
+            "resources/textures/front.png"
+        };
+        game->sky.texture = Texture_CreateCubeMap(paths);
+    }
+
+    /* Shader Layouts */
+
+    Shader_Layout *layout = &game->shaderProgram;
+    layout->Texture = Shader_GetUniformLocation(layout->ID, "Texture");
+    layout->modelToWorld = Shader_GetUniformLocation(layout->ID, "M_model");
+    layout->totalTransform = Shader_GetUniformLocation(layout->ID, "M_MVP");
+    layout->lightPosition = Shader_GetUniformLocation(layout->ID, "lightPosition");
+    layout->lightColor = Shader_GetUniformLocation(layout->ID, "lightColor");
+    layout->lightAttenuation = Shader_GetUniformLocation(layout->ID, "attenuation");
+    layout->Normal_Map = Shader_GetUniformLocation(layout->ID, "normalMap");
+
+    layout = &game->terrainProgram;
+    layout->modelToWorld = Shader_GetUniformLocation(layout->ID, "M_model");
+    layout->totalTransform = Shader_GetUniformLocation(layout->ID, "M_MVP");
+    layout->lightPosition = Shader_GetUniformLocation(layout->ID, "lightPosition");
+    layout->lightColor = Shader_GetUniformLocation(layout->ID, "lightColor");
+    layout->lightAttenuation = Shader_GetUniformLocation(layout->ID, "attenuation");
+
+    layout->extra0 = Shader_GetUniformLocation(layout->ID, "Texture_Background");
+    layout->extra1 = Shader_GetUniformLocation(layout->ID, "Texture_R");
+    layout->extra2 = Shader_GetUniformLocation(layout->ID, "Texture_G");
+    layout->extra3 = Shader_GetUniformLocation(layout->ID, "Texture_B");
+    layout->extra4 = Shader_GetUniformLocation(layout->ID, "Texture_BlendMap");
+
+    layout = &game->skyboxProgram;
+    layout->totalTransform = Shader_GetUniformLocation(layout->ID, "M_MVP");
+    layout->Texture = Shader_GetUniformLocation(layout->ID, "cubeMap");
+
+    game->normalMap = Texture_Create2D("resources/textures/normal_map.png");
+    game->defaultNormalMap = Texture_Create2D("resources/textures/default_normal_map.png");
+
+    fprintf(stderr, "Loading time: %u (ms)\n", SDL_GetTicks() - start);
+}
+
+void Draw(game_t *game)
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    /*We upload all the light vectors*/
+    static const light_t diffuseLight[1] =
+    {
+        /* Sun Light */
+        { {5.0f, 40.0f, 2.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {1.0f, 0.0f, 0.0f} },
+        /* Other lights
+        { {10.0f, 20.0f, 0.0f}, {1.0f, 0.0f, 0.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+        { {20.0f, 20.0f, 0.0f}, {0.0f, 0.0f, 1.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+        { {30.0f, 20.0f, 0.0f}, {0.0f, 1.0f, 0.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },*/
+    };
+
+    Shader_SetUniformVec3(game->shaderProgram.ID, "World_eyePosition", (float*)&game->camera.position);
+    Render_LoadLights(&game->shaderProgram, diffuseLight, 1);
+
+    glActiveTexture(GL_TEXTURE13);
+    glBindTexture(GL_TEXTURE_2D, game->normalMap);
+
+    glUniform1i(game->shaderProgram.Normal_Map, 13);
+
+    mat4_t viewMatrix, projectedViewMatrix;
+
+    viewMatrix = Camera_GetModelToViewMatrix(&game->camera);
+    projectedViewMatrix = mat4_mul(&game->camera.projectionMatrix, &viewMatrix);
+
+    Render_DrawEntity(&game->shaderProgram, &projectedViewMatrix, &game->player.entity);
+    Render_DrawEntity(&game->shaderProgram, &projectedViewMatrix, &game->ents[0]);
+
+    glUseProgram(game->terrainProgram.ID);
+
+    Shader_SetUniformVec3(game->terrainProgram.ID, "World_eyePosition", (float*)&game->camera.position);
+    Render_LoadLights(&game->terrainProgram, diffuseLight, 1);
+
+    Render_DrawTerrain(&game->terrainProgram, &projectedViewMatrix, game->terrain);
+
+    glUseProgram(game->skyboxProgram.ID);
+    Render_DrawSky(&game->skyboxProgram, &viewMatrix, &game->camera.projectionMatrix, &game->sky);
+
+    glUseProgram(game->shaderProgram.ID);
+
+    Window_Update(game->window);
+}
+
+void ProcessInput(game_t *game)
+{
+    static vec2_t mousePosition;
+    SDL_Event e;
+    while(SDL_PollEvent(&e))
+    {
+        switch(e.type)
+        {
+        case SDL_QUIT:
+            game->gameState = EXIT;
+            break;
+
+        case SDL_MOUSEMOTION:
+            mousePosition.x = (GLfloat) e.motion.x;
+            mousePosition.y = (GLfloat) e.motion.y;
+            Camera_MouseUpdate(&game->camera, &mousePosition);
+            break;
+
+        case SDL_KEYDOWN:
+            Input_PressKey(e.key.keysym.scancode);
+            break;
+
+        case SDL_KEYUP:
+            Input_ReleaseKey(e.key.keysym.scancode);
+            break;
+        }
+
+        if(Input_isKeyPressed(SDL_SCANCODE_UP))
+            Camera_Move_Foward(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_DOWN))
+            Camera_Move_Backward(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_LEFT))
+            Camera_Move_Left(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_RIGHT))
+            Camera_Move_Right(&game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_ESCAPE))
+            game->gameState = EXIT;
+    }
+}
diff --git a/08-august/src/math/math_util.c b/08-august/src/math/math_util.c
new file mode 100644
index 0000000..f58e447
--- /dev/null
+++ b/08-august/src/math/math_util.c
@@ -0,0 +1,10 @@
+#include "math_util.h"
+
+float baryCentric(vec3_t *p1, vec3_t *p2, vec3_t *p3, vec2_t *pos)
+{
+    float det = (p2->z - p3->z) * (p1->x - p3->x) + (p3->x - p2->x) * (p1->z - p3->z);
+	float l1 = ((p2->z - p3->z) * (pos->x - p3->x) + (p3->x - p2->x) * (pos->y - p3->z)) / det;
+	float l2 = ((p3->z - p1->z) * (pos->x - p3->x) + (p1->x - p3->x) * (pos->y - p3->z)) / det;
+	float l3 = 1.0f - l1 - l2;
+	return l1 * p1->y + l2 * p2->y + l3 * p3->y;
+}
diff --git a/08-august/src/math/math_util.h b/08-august/src/math/math_util.h
new file mode 100644
index 0000000..28a5464
--- /dev/null
+++ b/08-august/src/math/math_util.h
@@ -0,0 +1,9 @@
+#ifndef MATH_UTIL_H
+#define MATH_UTIL_H
+
+#include "vector3f.h"
+#include "vector2f.h"
+
+extern float baryCentric(vec3_t *p1, vec3_t *p2, vec3_t *p3, vec2_t *pos);
+
+#endif // MATH_UTIL_H
diff --git a/08-august/src/math/matrix4x4.c b/08-august/src/math/matrix4x4.c
new file mode 100644
index 0000000..1888727
--- /dev/null
+++ b/08-august/src/math/matrix4x4.c
@@ -0,0 +1,325 @@
+#include "matrix4x4.h"
+#include "../util/util.h"
+#include <SDL2/SDL.h>
+
+void mat4_identity(mat4_t *a)
+{
+    int i;
+    for(i = 0; i < 4*4; i++)
+    {
+        a->data[i] = 0.0f;
+    }
+    a->data[0 + 0 * 4] = 1.0f;
+    a->data[1 + 1 * 4] = 1.0f;
+    a->data[2 + 2 * 4] = 1.0f;
+    a->data[3 + 3 * 4] = 1.0f;
+}
+
+/** TODO: Preprocess these operation (1 + 1 * 4) -> 5 **/
+mat4_t mat4_inverse(const mat4_t *a)
+{
+    mat4_t inv;
+    int i;
+
+    /** Remember that inverted matrix is (1/det) * cofactor(transposed) **/
+    inv.data[0 + 0 * 4] =  (a->data[1 + 1 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 1 * 4] * a->data[3 + 2 * 4] * a->data[1 + 3 * 4] +
+                            a->data[3 + 1 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 1 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[1 + 1 * 4] -
+                            a->data[3 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 1 * 4]);
+
+    inv.data[0 + 1 * 4] = -(a->data[0 + 1 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 1 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 1 * 4] * a->data[0 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 1 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 1 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 2 * 4] * a->data[2 + 1 * 4]);
+
+    inv.data[0 + 2 * 4] =  (a->data[0 + 1 * 4] * a->data[1 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[1 + 1 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 1 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[3 + 1 * 4] -
+                            a->data[1 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 1 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 2 * 4] * a->data[1 + 1 * 4]);
+
+    inv.data[0 + 3 * 4] = -(a->data[0 + 1 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] +
+                            a->data[1 + 1 * 4] * a->data[2 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[2 + 1 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 1 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[0 + 1 * 4] -
+                            a->data[2 + 3 * 4] * a->data[0 + 2 * 4] * a->data[1 + 1 * 4]);
+
+    inv.data[1 + 0 * 4] = -(a->data[1 + 0 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 2 * 4] * a->data[1 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[1 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[1 + 1 * 4] =  (a->data[0 + 0 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 2 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[1 + 2 * 4] = -(a->data[0 + 0 * 4] * a->data[1 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[3 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 + 4] * a->data[0 + 2 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[1 + 3 * 4] =  (a->data[0 + 0 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[2 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[0 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[0 + 2 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[2 + 0 * 4] =  (a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[1 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 3 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 1 * 4] * a->data[1 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[2 + 1 * 4] = -(a->data[0 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[2 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[2 + 2 * 4] =  (a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[3 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[2 + 3 * 4] = -(a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[0 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[3 + 0 * 4] = -(a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 2 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[1 + 2 * 4] +
+                            a->data[3 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 2 * 4] -
+                            a->data[1 + 2 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 2 * 4] * a->data[3 + 1 * 4] * a->data[1 + 0 * 4] -
+                            a->data[3 + 2 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[3 + 1 * 4] =  (a->data[0 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 2 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 2 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[2 + 2 * 4] -
+                            a->data[0 + 2 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 2 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 2 * 4] * a->data[0 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[3 + 2 * 4] = -(a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[3 + 2 * 4] +
+                            a->data[1 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 2 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 2 * 4] -
+                            a->data[0 + 2 * 4] * a->data[1 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[1 + 2 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 2 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[3 + 3 * 4] =  (a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 2 * 4] +
+                            a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[0 + 2 * 4] +
+                            a->data[2 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 2 * 4] -
+                            a->data[0 + 2 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4] -
+                            a->data[1 + 2 * 4] * a->data[2 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[2 + 2 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    /** Remember that our matrix is already transposed and we also got the minors(inside each "inv" entry),
+        so we just use them. We use a->data[0 + 1 * 4] * inv.data[1 + 0 * 4] becouse inv.data is transposed **/
+    float det = a->data[0 + 0 * 4] * inv.data[0 + 0 * 4] + a->data[0 + 1 * 4] * inv.data[1 + 0 * 4] +
+                a->data[0 + 2 * 4] * inv.data[2 + 0 * 4] + a->data[0 + 3 * 4] * inv.data[3 + 0 * 4];
+
+    if(det == 0.0f)
+        return *a;
+
+    det = 1.0f / det;
+
+    for(i = 0; i < 16; i++)
+        inv.data[i] *= det;
+
+    return inv;
+}
+
+mat4_t mat4_mul(const mat4_t* a, const mat4_t* b)
+{
+    int i, j, k;
+    GLfloat sum = 0.0f;
+    mat4_t c;
+    mat4_identity(&c);
+    for(i = 0; i < 4; i++)
+        for(j = 0; j < 4; j++){
+            for(k = 0; k < 4; k++){
+                sum += a->data[i + k * 4] * b->data[k + j * 4];
+            }
+            c.data[i + j * 4] = sum;
+            sum = 0.0f;
+        }
+
+    return c;
+}
+
+mat4_t mat4_translate(const vec3_t *a)
+{
+    mat4_t b;
+    mat4_identity(&b);
+    b.data[0 + 3 * 4] = a->x;
+    b.data[1 + 3 * 4] = a->y;
+    b.data[2 + 3 * 4] = a->z;
+    return b;
+}
+
+mat4_t mat4_scale(GLfloat x, GLfloat y, GLfloat z)
+{
+    mat4_t b;
+    mat4_identity(&b);
+    b.data[0 + 0 * 4] = x;
+    b.data[1 + 1 * 4] = y;
+    b.data[2 + 2 * 4] = z;
+    return b;
+}
+
+mat4_t mat4_rotate(GLfloat degrees, const vec3_t* a)
+{
+    mat4_t b;
+    mat4_identity(&b);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees)), o = 1-c;
+    b.data[0 + 0 * 4] = a->x * a->x * o + c;
+    b.data[0 + 1 * 4] = a->x * a->y * o - a->z * s;
+    b.data[0 + 2 * 4] = a->x * a->z * o + a->y * s;
+
+    b.data[1 + 0 * 4] = a->x * a->y * o + a->z * s;
+    b.data[1 + 1 * 4] = a->y * a->y * o + c;
+    b.data[1 + 2 * 4] = a->y * a->z * o - a->x * s;
+
+    b.data[2 + 0 * 4] = a->x * a->z * o - a->y * s;
+    b.data[2 + 1 * 4] = a->y * a->z * o + a->x * s;
+    b.data[2 + 2 * 4] = a->z * a->z * o + c;
+    return b;
+}
+
+mat4_t mat4_rotate_x(GLfloat degrees)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[1 + 1 * 4] = c;
+    a.data[2 + 1 * 4] = s;
+    a.data[1 + 2 * 4] = -s;
+    a.data[2 + 2 * 4] = c;
+    return a;
+}
+
+mat4_t mat4_rotate_y(GLfloat degrees)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[0 + 0 * 4] = c;
+    a.data[2 + 0 * 4] = -s;
+    a.data[0 + 2 * 4] = s;
+    a.data[2 + 2 * 4] = c;
+    return a;
+}
+
+mat4_t mat4_rotate_z(GLfloat degrees)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[0 + 0 * 4] = c;
+    a.data[1 + 0 * 4] = s;
+    a.data[0 + 1 * 4] = -s;
+    a.data[1 + 1 * 4] = c;
+    return a;
+}
+
+mat4_t mat4_perspective(GLfloat fov, GLfloat aspect, GLfloat zNear, GLfloat zFar)
+{
+    mat4_t a;
+    GLubyte i, j;
+    for(i = 0; i < 4; i++)
+        for(j = 0; j < 4; j++)
+            a.data[i + j * 4] = 0.0f;
+    fov = toRadians(fov); // To radians
+
+    a.data[0 + 0 * 4] = ( (1.0f / SDL_tanf( fov/2.0f )) / aspect);
+    a.data[1 + 1 * 4] = (1.0f / SDL_tanf( fov/2.0f ));
+    a.data[2 + 2 * 4] = -( (zFar + zNear) / (zFar - zNear) );
+    a.data[2 + 3 * 4] = -( ( 2.0f * zFar * zNear) / (zFar - zNear) );
+    a.data[3 + 2 * 4] = -1.0f;
+
+    return a;
+}
+
+mat4_t
+mat4_orthographic(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top)
+{
+    mat4_t a;
+    mat4_identity(&a);
+    a.data[0 + 0 * 4] = 2.0f / (right - left);
+    a.data[1 + 1 * 4] = 2.0f / (top - bottom);
+    a.data[2 + 2 * 4] = -1.0f;
+
+    a.data[0 + 3 * 4] = (left + right) / (left - right);
+    a.data[1 + 3 * 4] = (bottom + top) / (bottom - top);
+
+    return a;
+}
+
+mat4_t mat4_lookAt(vec3_t* eye, vec3_t* center, vec3_t* up)
+{
+    vec3_t temp = vec3_sub(center, eye);
+
+    vec3_t f = vec3_normalize(&temp);
+    vec3_t u = vec3_normalize(up);
+    temp = vec3_cross_mul(&f, &u);
+    vec3_t s = vec3_normalize(&temp);
+    u = vec3_cross_mul(&s, &f);
+
+    mat4_t a;
+    mat4_identity(&a);
+
+    a.data[0 + 0 * 4] = s.x;

+    a.data[0 + 1 * 4] = s.y;

+    a.data[0 + 2 * 4] = s.z;

+    a.data[1 + 0 * 4] = u.x;

+    a.data[1 + 1 * 4] = u.y;

+    a.data[1 + 2 * 4] = u.z;

+    a.data[2 + 0 * 4] =-f.x;

+    a.data[2 + 1 * 4] =-f.y;

+    a.data[2 + 2 * 4] =-f.z;

+    a.data[0 + 3 * 4] =-vec3_dot_mul(&s, eye);

+    a.data[1 + 3 * 4] =-vec3_dot_mul(&u, eye);

+    a.data[2 + 3 * 4] = vec3_dot_mul(&f, eye);
+

+    return a;
+}
+
+vec3_t mat4_mul_vec3(const mat4_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = a->data[0 + 0 * 4] * b->x + a->data[0 + 1 * 4] * b->y + a->data[0 + 2 * 4] * b->z + a->data[0 + 3 * 4];
+    c.y = a->data[1 + 0 * 4] * b->x + a->data[1 + 1 * 4] * b->y + a->data[1 + 2 * 4] * b->z + a->data[1 + 3 * 4];
+    c.z = a->data[2 + 0 * 4] * b->x + a->data[2 + 1 * 4] * b->y + a->data[2 + 2 * 4] * b->z + a->data[2 + 3 * 4];
+    return c;
+}
+
+vec4_t mat4_mul_vec4(const mat4_t *a, const vec4_t *b)
+{
+    vec4_t c;
+    c.x = a->data[0 + 0 * 4] * b->x + a->data[0 + 1 * 4] * b->y + a->data[0 + 2 * 4] * b->z + a->data[0 + 3 * 4] * b->w;
+    c.y = a->data[1 + 0 * 4] * b->x + a->data[1 + 1 * 4] * b->y + a->data[1 + 2 * 4] * b->z + a->data[1 + 3 * 4] * b->w;
+    c.z = a->data[2 + 0 * 4] * b->x + a->data[2 + 1 * 4] * b->y + a->data[2 + 2 * 4] * b->z + a->data[2 + 3 * 4] * b->w;
+    c.w = a->data[3 + 0 * 4] * b->x + a->data[3 + 1 * 4] * b->y + a->data[3 + 2 * 4] * b->z + a->data[3 + 3 * 4] * b->w;
+    return c;
+}
diff --git a/08-august/src/math/matrix4x4.h b/08-august/src/math/matrix4x4.h
new file mode 100644
index 0000000..b7d54aa
--- /dev/null
+++ b/08-august/src/math/matrix4x4.h
@@ -0,0 +1,40 @@
+#ifndef MATRIX4X4_H
+#define MATRIX4X4_H
+
+#include <GL/glew.h>
+#include "vector3f.h"
+#include "vector4f.h"
+
+/* accesing data: row + column * width */
+typedef struct
+{
+    GLfloat data[16];
+} mat4_t;
+
+extern void mat4_identity(mat4_t *a);
+extern mat4_t mat4_inverse(const mat4_t *a);
+extern mat4_t mat4_mul(const mat4_t *a, const mat4_t *b);
+
+extern mat4_t mat4_translate(const vec3_t *a);
+extern mat4_t mat4_scale(GLfloat x, GLfloat y, GLfloat z);
+extern mat4_t mat4_rotate_x(GLfloat degrees);
+extern mat4_t mat4_rotate_y(GLfloat degrees);
+extern mat4_t mat4_rotate_z(GLfloat degrees);
+extern mat4_t mat4_rotate(GLfloat degrees, const vec3_t *a);
+
+extern mat4_t
+mat4_perspective(GLfloat fov, GLfloat aspect, GLfloat zNear, GLfloat zFar);
+
+extern mat4_t
+mat4_orthographic(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top);
+
+extern mat4_t
+mat4_lookAt(vec3_t *eye, vec3_t *center, vec3_t *up);
+
+extern vec3_t
+mat4_mul_vec3(const mat4_t *a, const vec3_t *b);
+
+extern vec4_t
+mat4_mul_vec4(const mat4_t *a, const vec4_t *b);
+
+#endif // MATRIX4X4_H
diff --git a/08-august/src/math/vector2f.c b/08-august/src/math/vector2f.c
new file mode 100644
index 0000000..37ffa9c
--- /dev/null
+++ b/08-august/src/math/vector2f.c
@@ -0,0 +1,54 @@
+#include "vector2f.h"
+#include <SDL2/SDL.h>
+
+vec2_t vec2_add(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    return c;
+}
+
+vec2_t vec2_sub(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    return c;
+}
+
+vec2_t vec2_scalar_mul(const vec2_t* a, GLfloat scalar)
+{
+    vec2_t c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    return c;
+}
+
+GLfloat vec2_dot_mul(const vec2_t* a, const vec2_t* b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) );
+}
+
+
+vec2_t vec2_cross_mul(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = (a->x * b->y) - (a->y * b->x);
+    c.y = (a->y * b->x) - (a->x * b->y);
+    return c;
+}
+
+GLfloat vec2_length(vec2_t* a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) );
+}
+
+vec2_t vec2_normalize(vec2_t* a)
+{
+    vec2_t b;
+    GLfloat length = vec2_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    return b;
+}
diff --git a/08-august/src/math/vector2f.h b/08-august/src/math/vector2f.h
new file mode 100644
index 0000000..bc1d0bc
--- /dev/null
+++ b/08-august/src/math/vector2f.h
@@ -0,0 +1,19 @@
+#ifndef VECTOR2F_H
+#define VECTOR2F_H
+
+#include <GL/glew.h>
+
+typedef struct
+{
+    GLfloat x, y;
+} vec2_t;
+
+extern vec2_t vec2_add(const vec2_t* a, const vec2_t* b);
+extern vec2_t vec2_sub(const vec2_t* a, const vec2_t* b);
+extern vec2_t vec2_scalar_mul(const vec2_t* a, GLfloat scalar);
+extern GLfloat vec2_dot_mul(const vec2_t* a, const vec2_t* b);
+extern vec2_t vec2_cross_mul(const vec2_t* a, const vec2_t* b);
+extern GLfloat vec2_length(vec2_t* a);
+extern vec2_t vec2_normalize(vec2_t* a);
+
+#endif // VECTOR2F_H
diff --git a/08-august/src/math/vector3f.c b/08-august/src/math/vector3f.c
new file mode 100644
index 0000000..2c2878c
--- /dev/null
+++ b/08-august/src/math/vector3f.c
@@ -0,0 +1,59 @@
+#include "vector3f.h"
+#include <SDL2/SDL.h>
+
+vec3_t vec3_add(const vec3_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    c.z = a->z + b->z;
+    return c;
+}
+
+vec3_t vec3_sub(const vec3_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    c.z = a->z - b->z;
+    return c;
+}
+
+vec3_t vec3_scalar_mul(const vec3_t* a, GLfloat scalar)
+{
+    vec3_t c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    c.z = a->z * scalar;
+    return c;
+}
+
+GLfloat vec3_dot_mul(const vec3_t* a, const vec3_t* b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) + (a->z * b->z) );
+}
+
+
+vec3_t vec3_cross_mul(const vec3_t* a, const vec3_t* b)
+{
+    vec3_t c;
+    c.x = (a->y * b->z) - (a->z * b->y);
+    c.y = (a->z * b->x) - (a->x * b->z);
+    c.z = (a->x * b->y) - (a->y * b->x);
+    return c;
+}
+
+GLfloat vec3_length(vec3_t* a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f));
+}
+
+vec3_t vec3_normalize(vec3_t* a)
+{
+    vec3_t b;
+    GLfloat length = vec3_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    b.z = a->z / length;
+    return b;
+}
diff --git a/08-august/src/math/vector3f.h b/08-august/src/math/vector3f.h
new file mode 100644
index 0000000..ab89cb8
--- /dev/null
+++ b/08-august/src/math/vector3f.h
@@ -0,0 +1,19 @@
+#ifndef VECTOR3F_H
+#define VECTOR3F_H
+
+#include <GL/glew.h>
+
+typedef struct
+{
+    GLfloat x, y, z;
+} vec3_t;
+
+extern vec3_t vec3_add(const vec3_t* a, const vec3_t* b);
+extern vec3_t vec3_sub(const vec3_t* a, const vec3_t* b);
+extern vec3_t vec3_scalar_mul(const vec3_t* a, GLfloat scalar);
+extern GLfloat vec3_dot_mul(const vec3_t* a, const vec3_t* b);
+extern vec3_t vec3_cross_mul(const vec3_t* a, const vec3_t* b);
+extern GLfloat vec3_length(vec3_t* a);
+extern vec3_t vec3_normalize(vec3_t* a);
+
+#endif // VECTOR3F_H
diff --git a/08-august/src/math/vector4f.c b/08-august/src/math/vector4f.c
new file mode 100644
index 0000000..57e4925
--- /dev/null
+++ b/08-august/src/math/vector4f.c
@@ -0,0 +1,53 @@
+#include "vector4f.h"
+#include <SDL2/SDL.h>
+
+vec4_t vec4_add(const vec4_t* a, const vec4_t* b)
+{
+    vec4_t c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    c.z = a->z + b->z;
+    c.w = a->w + b->w;
+    return c;
+}
+
+vec4_t vec4_sub(const vec4_t* a, const vec4_t* b)
+{
+    vec4_t c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    c.z = a->z - b->z;
+    c.w = a->w - b->w;
+    return c;
+}
+
+vec4_t vec4_scalar_mul(const vec4_t* a, GLfloat scalar)
+{
+    vec4_t c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    c.z = a->z * scalar;
+    c.w = a->w * scalar;
+    return c;
+}
+
+GLfloat vec4_dot_mul(const vec4_t* a, const vec4_t* b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) + (a->z * b->z) + (a->w * b->w) );
+}
+
+GLfloat vec4_length(vec4_t* a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f) + SDL_pow(a->w, 2.0f) );
+}
+
+vec4_t vec4_normalize(vec4_t* a)
+{
+    vec4_t b;
+    GLfloat length = vec4_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    b.z = a->z / length;
+    b.w = a->w / length;
+    return b;
+}
diff --git a/08-august/src/math/vector4f.h b/08-august/src/math/vector4f.h
new file mode 100644
index 0000000..9a2f149
--- /dev/null
+++ b/08-august/src/math/vector4f.h
@@ -0,0 +1,18 @@
+#ifndef VECTOR4F_H
+#define VECTOR4F_H
+
+#include <GL/glew.h>
+
+typedef struct
+{
+    GLfloat x, y, z, w;
+} vec4_t;
+
+extern vec4_t vec4_add(const vec4_t *a, const vec4_t *b);
+extern vec4_t vec4_sub(const vec4_t *a, const vec4_t *b);
+extern vec4_t vec4_scalar_mul(const vec4_t *a, GLfloat scalar);
+extern GLfloat vec4_dot_mul(const vec4_t *a, const vec4_t *b);
+extern GLfloat vec4_length(vec4_t *a);
+extern vec4_t vec4_normalize(vec4_t *a);
+
+#endif // VECTOR4F_H
diff --git a/08-august/src/player.c b/08-august/src/player.c
new file mode 100644
index 0000000..47f285b
--- /dev/null
+++ b/08-august/src/player.c
@@ -0,0 +1,62 @@
+#include "player.h"
+#include "util/util_time.h"
+#include "input.h"
+#include "util/util.h"
+
+#define MAX_MOVEMENT_SPEED 10
+#define MAX_ROTATION_SPEED 100
+#define GRAVITY -15
+#define JUMP_POWER 7
+
+static void jump(player_t* player)
+{
+    player->verticalSpeed = JUMP_POWER;
+}
+
+static void check_input(player_t* player)
+{
+    if(Input_isKeyPressed(SDL_SCANCODE_W)) {
+        player->speed = MAX_MOVEMENT_SPEED;
+    } else if(Input_isKeyPressed(SDL_SCANCODE_S)) {
+        player->speed = -MAX_MOVEMENT_SPEED;
+    } else {
+        player->speed = 0.0f;
+    }
+
+    if(Input_isKeyPressed(SDL_SCANCODE_A)) {
+        player->turnSpeed = MAX_ROTATION_SPEED;
+    } else if(Input_isKeyPressed(SDL_SCANCODE_D)) {
+        player->turnSpeed = -MAX_ROTATION_SPEED;
+    } else {
+        player->turnSpeed = 0.0f;
+    }
+
+    if(Input_isKeyPressed(SDL_SCANCODE_SPACE)) {
+        jump(player);
+    }
+}
+
+void Player_Init(player_t* player)
+{
+    player->entity.position = (vec3_t){ 0.0f, 35.0f, 0.0f };
+    player->entity.rotX = player->entity.rotY = player->entity.rotZ = 0;
+    player->speed = player->turnSpeed = player->verticalSpeed = 0;
+}
+
+void Player_Update(player_t *player, terrain_t *terrain)
+{
+    check_input(player);
+    player->entity.rotY += player->turnSpeed * Time_GetFrameTime();
+    player->entity.position.x += SDL_sinf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
+    player->entity.position.z += SDL_cosf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
+
+    //player->verticalSpeed += GRAVITY * Time_GetFrameTime();
+
+    //player->entity.position.y += player->verticalSpeed * Time_GetFrameTime();
+
+    GLfloat terrainHeight = Terrain_GetHeightOfTerrain(terrain, player->entity.position.x, player->entity.position.z);
+    if(player->entity.position.y - 1.0f < terrainHeight) {
+        //player->entity.position.y = terrainHeight + 1.0f;
+        //player->verticalSpeed = 0.0f;
+    }
+}
diff --git a/08-august/src/player.h b/08-august/src/player.h
new file mode 100644
index 0000000..654dc17
--- /dev/null
+++ b/08-august/src/player.h
@@ -0,0 +1,17 @@
+#ifndef PLAYER_H
+#define PLAYER_H
+
+#include "renderer/entity.h"
+#include "math/vector3f.h"
+#include "terrain.h"
+
+typedef struct
+{
+    entity_t entity;
+    float speed, turnSpeed, verticalSpeed;
+} player_t;
+
+extern void Player_Init(player_t* player);
+extern void Player_Update(player_t* player, terrain_t *terrain);
+
+#endif // PLAYER_H
diff --git a/08-august/src/renderer/entity.c b/08-august/src/renderer/entity.c
new file mode 100644
index 0000000..b96491d
--- /dev/null
+++ b/08-august/src/renderer/entity.c
@@ -0,0 +1,18 @@
+#include "entity.h"
+
+mat4_t Entity_GetModelTransform(entity_t* entity)
+{
+    mat4_t temp;
+    mat4_t rotation = mat4_rotate_x(entity->rotX);
+    temp = mat4_rotate_y(entity->rotY);
+    rotation = mat4_mul(&rotation, &temp);
+    temp = mat4_rotate_z(entity->rotZ);
+    rotation = mat4_mul(&rotation, &temp);
+
+    temp = mat4_translate(&entity->position);
+
+    mat4_t modelTransform = mat4_mul(&temp, &rotation);
+
+    return modelTransform;
+}
+
diff --git a/08-august/src/renderer/entity.h b/08-august/src/renderer/entity.h
new file mode 100644
index 0000000..ba33004
--- /dev/null
+++ b/08-august/src/renderer/entity.h
@@ -0,0 +1,20 @@
+#ifndef ENTITY_H
+#define ENTITY_H
+
+#include "../math/vector3f.h"
+#include "../math/matrix4x4.h"
+
+#include "shape.h"
+#include "../texture.h"
+
+typedef struct
+{
+    shape_t *shape;
+    GLuint texture;
+    vec3_t position;
+    float rotX, rotY, rotZ;
+} entity_t;
+
+extern mat4_t Entity_GetModelTransform(entity_t* entity);
+
+#endif // ENTITY_H
diff --git a/08-august/src/renderer/renderer.c b/08-august/src/renderer/renderer.c
new file mode 100644
index 0000000..2ea4426
--- /dev/null
+++ b/08-august/src/renderer/renderer.c
@@ -0,0 +1,147 @@
+#include "renderer.h"
+#include "../util/util_time.h"
+
+#include <string.h>
+
+#define MAX_LIGHTS 4
+
+void Render_Init()
+{
+
+}
+
+void Render_LoadLights(Shader_Layout *layout, const light_t *lights, int n)
+{
+    vec3_t light_positions[MAX_LIGHTS];
+    vec4_t light_colors[MAX_LIGHTS];
+    vec3_t attenuation[MAX_LIGHTS];
+
+    /* Default light in case we are not given enough lights (n < 4) */
+    const light_t defaultLight = { {0.0f, 0.0f, 0.0f}, {0.0f, 0.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f} };
+
+    int i;
+    for(i = 0; i < MAX_LIGHTS; i++)
+    {
+        if(i < MAX_LIGHTS)
+        {
+            light_positions[i] = lights[i].position;
+            light_colors[i] = lights[i].color;
+            attenuation[i] = lights[i].attenuation;
+        }
+        else
+        {
+            light_positions[i] = defaultLight.position;
+            light_colors[i] = defaultLight.color;
+            attenuation[i] = defaultLight.attenuation;
+        }
+
+    }
+
+    glUniform3fv(layout->lightPosition, MAX_LIGHTS, (float*)light_positions);
+    glUniform4fv(layout->lightColor, MAX_LIGHTS, (float*)light_colors);
+    glUniform3fv(layout->lightAttenuation, MAX_LIGHTS, (float*)attenuation);
+
+}
+
+void Render_DrawEntity(Shader_Layout *layout, mat4_t *projectedViewMatrix, entity_t *entity)
+{
+    glBindVertexArray(entity->shape->vao);
+
+    /*We need the model to world matrix in our shader in order to rotate the normals*/
+    mat4_t modelTransform = Entity_GetModelTransform(entity);
+    glUniformMatrix4fv(layout->modelToWorld, 1, GL_FALSE, modelTransform.data);
+
+    mat4_t totalMatrix = mat4_mul(projectedViewMatrix, &modelTransform);
+    glUniformMatrix4fv(layout->totalTransform, 1, GL_FALSE, totalMatrix.data);
+
+    glActiveTexture(GL_TEXTURE0);
+    glUniform1i(layout->Texture, 0);
+    glBindTexture(GL_TEXTURE_2D, entity->texture);
+
+    glDrawElements(GL_TRIANGLES, entity->shape->num_indices, GL_UNSIGNED_SHORT, NULL);
+    glBindVertexArray(0);
+}
+
+/******************************************************************************
+*                                                                             *
+* Function Name: Render_DrawTerrain                                           *
+*                                                                             *
+* Specific shader layout                                                      *
+* -> extra0 Texture_Background                                                *
+* -> extra1 Texture_R                                                         *
+* -> extra2 Texture_G                                                         *
+* -> extra3 Texture_B                                                         *
+* -> extra4 Texture_BlendMap                                                  *
+*                                                                             *
+*******************************************************************************/
+
+void Render_DrawTerrain(Shader_Layout *layout, mat4_t *projectedViewMatrix, terrain_t *terrain)
+{
+    glBindVertexArray(terrain->shape->vao);
+
+    /* We need the model to world matrix in our shader in order to rotate the normals */
+    mat4_t modelTransform = mat4_translate(&terrain->position);
+    glUniformMatrix4fv(layout->modelToWorld, 1, GL_FALSE, modelTransform.data);
+
+    mat4_t totalMatrix = mat4_mul(projectedViewMatrix, &modelTransform);
+    glUniformMatrix4fv(layout->totalTransform, 1, GL_FALSE, totalMatrix.data);
+
+    /** Set textures for the terrain **/
+
+    glUniform1i(layout->extra0, 0);
+    glUniform1i(layout->extra1, 1);
+    glUniform1i(layout->extra2, 2);
+    glUniform1i(layout->extra3, 3);
+    glUniform1i(layout->extra4, 4);
+
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, terrain->textures.texture[0]);
+    glActiveTexture(GL_TEXTURE1);
+    glBindTexture(GL_TEXTURE_2D, terrain->textures.texture[1]);
+    glActiveTexture(GL_TEXTURE2);
+    glBindTexture(GL_TEXTURE_2D, terrain->textures.texture[2]);
+    glActiveTexture(GL_TEXTURE3);
+    glBindTexture(GL_TEXTURE_2D, terrain->textures.texture[3]);
+    glActiveTexture(GL_TEXTURE4);
+    glBindTexture(GL_TEXTURE_2D, terrain->blendmap);
+
+    /************************************************************/
+
+    glDrawElements(GL_TRIANGLES, terrain->shape->num_indices, GL_UNSIGNED_SHORT, NULL);
+
+    glBindVertexArray(0);
+}
+
+void Render_DrawSky(Shader_Layout *layout, mat4_t *viewMatrix, mat4_t *projectionMatrix, skybox_t *sky)
+{
+    glBindVertexArray(sky->cube->vao);
+
+    mat4_t myViewMatrix = *viewMatrix;
+    sky->rotation += SKYBOX_ROTATION_SPEED * Time_GetFrameTime();
+    mat4_t rotateMatrix = mat4_rotate_y(sky->rotation);
+
+    /* We don't want to move the skybox around (We want it to stay with the camera in the midle),
+       just rotate it with the camera so we remove the translations components of the matrix */
+
+    myViewMatrix.data[0 + 3 * 4] = 0.0f;
+    myViewMatrix.data[1 + 3 * 4] = 0.0f;
+    myViewMatrix.data[2 + 3 * 4] = 0.0f;
+
+    myViewMatrix = mat4_mul(&myViewMatrix, &rotateMatrix);
+    mat4_t totalTransform = mat4_mul(projectionMatrix, &myViewMatrix);
+
+    glUniformMatrix4fv(layout->totalTransform, 1, GL_FALSE, totalTransform.data );
+
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, sky->texture);
+    glUniform1i(layout->Texture, 0);
+
+    glDrawArrays(GL_TRIANGLES, 0, 36);
+
+    glBindVertexArray(0);
+}
+
+void Render_Quit()
+{
+
+}
diff --git a/08-august/src/renderer/renderer.h b/08-august/src/renderer/renderer.h
new file mode 100644
index 0000000..b6f4f76
--- /dev/null
+++ b/08-august/src/renderer/renderer.h
@@ -0,0 +1,18 @@
+#ifndef RENDERER_H
+#define RENDERER_H
+
+#include "../graphics/shaders.h"
+#include "entity.h"
+#include "skybox.h"
+#include "../terrain.h"
+#include "../light.h"
+
+extern void Render_Init();
+/* Load lights into the shader program */
+extern void Render_LoadLights(Shader_Layout *layout, const light_t *lights, int n);
+extern void Render_DrawEntity(Shader_Layout *layout, mat4_t *projectedViewMatrix, entity_t *entity);
+extern void Render_DrawTerrain(Shader_Layout *layout, mat4_t *projectedViewMatrix, terrain_t *terrain);
+extern void Render_DrawSky(Shader_Layout *layout, mat4_t *viewMatrix, mat4_t *projectionMatrix, skybox_t *sky);
+extern void Render_Quit();
+
+#endif // RENDERER_H
diff --git a/08-august/src/renderer/shape.c b/08-august/src/renderer/shape.c
new file mode 100644
index 0000000..7f274df
--- /dev/null
+++ b/08-august/src/renderer/shape.c
@@ -0,0 +1,335 @@
+#include "shape.h"
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "../util/util.h"
+
+#define NUM_ARRAY_ELEMENTS(a) sizeof(a) / sizeof(*a)
+
+shape_t *Shape_CreateFromRawData(vertex_t* vertices, GLsizeiptr vertexBuffersize,
+                                 GLushort* indices, GLsizeiptr indexBuffersize)
+{
+    shape_t *shape = malloc( sizeof(shape_t) );
+
+    shape->num_indices = ( indexBuffersize / sizeof(GLushort) );
+
+    glGenVertexArrays(1, &shape->vao);
+    glGenBuffers(1, &shape->vbo);
+    glGenBuffers(1, &shape->ebo);
+
+    glBindVertexArray(shape->vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, shape->vbo);
+    glBufferData(GL_ARRAY_BUFFER, vertexBuffersize, vertices, GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, shape->ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexBuffersize, indices, GL_STATIC_DRAW);
+
+    glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
+    glEnableVertexAttribArray(2);
+    glEnableVertexAttribArray(3);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, position) );
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, texCoord) );
+    glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, normal) );
+    glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, tangent) );
+
+    glBindVertexArray(0);
+
+    return shape;
+}
+
+shape_t* Shape_MakeSkyBox(float size)
+{
+    vec3_t positions[] =
+    {
+        {-size,  size, -size}, {-size, -size, -size}, {+size, -size, -size},
+        {+size, -size, -size}, {+size, +size, -size}, {-size, +size, -size},
+
+	    {-size, -size, +size}, {-size, -size, -size}, {-size, +size, -size},
+	    {-size, +size, -size}, {-size, +size, +size}, {-size, -size, +size},
+
+        {+size, -size, -size}, {+size, -size, +size}, {+size, +size, +size},
+	    {+size, +size, +size}, {+size, +size, -size}, {+size, -size, -size},
+
+	    {-size, -size, +size}, {-size, +size, +size}, {+size, +size, +size},
+	    {+size, +size, +size}, {+size, -size, +size}, {-size, -size, +size},
+
+	    {-size, +size, -size}, {+size, +size, -size}, {+size, +size, +size},
+	    {+size, +size, +size}, {-size, +size, +size}, {-size, +size, -size},
+
+	    {-size, -size, -size}, {-size, -size, +size}, {+size, -size, -size},
+	    {+size, -size, -size}, {-size, -size, +size}, {+size, -size, +size}
+	};
+
+    shape_t *shape = malloc( sizeof(shape_t) );
+
+    shape->num_indices = 0;
+
+    glGenVertexArrays(1, &shape->vao);
+    glGenBuffers(1, &shape->vbo);
+    shape->ebo = 0;
+
+    glBindVertexArray(shape->vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, shape->vbo);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(positions), positions, GL_STATIC_DRAW);
+
+    glEnableVertexAttribArray(0);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0 );
+
+    glBindVertexArray(0);
+
+    return shape;
+}
+
+static const int BUFFER_size = 128;
+
+typedef struct
+{
+    vertex_t *data;
+    GLushort *indices;
+
+    vec3_t *positions;
+    vec2_t *textures;
+    vec3_t *normals;
+    vec3_t *tangents;
+
+    unsigned int vertex_count, index_count;
+    unsigned int index_pointer;
+
+    GLubyte hasTextCoords, hasNormals;
+} OBJ_Mesh;
+
+static vertex_t *search_index(vertex_t *pkey, vertex_t *pelem, unsigned int vertex_count)
+{
+    int i;
+    for(i = 0; i < vertex_count; i++)
+    {
+        if(pelem[i].position.x == pkey->position.x &&
+           pelem[i].position.y == pkey->position.y &&
+           pelem[i].position.z == pkey->position.z &&
+           pelem[i].texCoord.x == pkey->texCoord.x &&
+           pelem[i].texCoord.y == pkey->texCoord.y &&
+           pelem[i].normal.x == pkey->normal.x &&
+           pelem[i].normal.y == pkey->normal.y &&
+           pelem[i].normal.z == pkey->normal.z)
+        {
+            return &pelem[i];
+        }
+    }
+    return NULL;
+}
+
+static void calculate_tangents(OBJ_Mesh *mesh)
+{
+    int i;
+    for(i = 0; i < mesh->index_count; i += 3)
+    {
+        int i0 = i;
+        int i1 = i + 1;
+        int i2 = i + 2;
+
+        vec3_t *v0 = &mesh->positions[i0];
+        vec3_t *v1 = &mesh->positions[i1];
+        vec3_t *v2 = &mesh->positions[i2];
+
+        vec2_t *uv0 = &mesh->textures[i0];
+        vec2_t *uv1 = &mesh->textures[i1];
+        vec2_t *uv2 = &mesh->textures[i2];
+
+        vec3_t deltaPos1 = vec3_sub(v1, v0);
+        vec3_t deltaPos2 = vec3_sub(v2, v0);
+
+        vec2_t deltaUV1 = vec2_sub(uv1, uv0);
+        vec2_t deltaUV2 = vec2_sub(uv2, uv0);
+
+        GLfloat r = 1.0f / (deltaUV1.x * deltaUV2.y - deltaUV1.y * deltaUV2.x);
+
+        deltaPos1 = vec3_scalar_mul(&deltaPos1, deltaUV2.y);
+        deltaPos2 = vec3_scalar_mul(&deltaPos2, deltaUV1.y);
+
+        vec3_t tangent = vec3_sub(&deltaPos1, &deltaPos2);
+        tangent = vec3_scalar_mul(&tangent, r);
+
+        mesh->tangents[i2] = tangent;
+        mesh->tangents[i1] = tangent;
+        mesh->tangents[i0] = tangent;
+    }
+    /*
+    We normalize the tangents at the end of the parse_obj_index loop
+    for(i = 0; i < mesh.index_count; i++)
+    {
+        mesh.tangents[i] = vec3_normalize(&mesh.tangents[i]);
+    }
+    */
+}
+
+static void parse_obj_index(OBJ_Mesh *mesh, vertex_t *current_vertex)
+{
+    vertex_t *indexOnArray = search_index(current_vertex, mesh->data, mesh->vertex_count);
+
+    /* We check if the vertex was already loaded, so the index points to the created vertex instead of repeating data*/
+    if(indexOnArray == NULL)
+    {
+        mesh->data = (vertex_t*) realloc( mesh->data, sizeof(vertex_t) * (++mesh->vertex_count) );
+
+        /* We make the index point to the last vertex added */
+        mesh->indices[mesh->index_pointer] = mesh->vertex_count - 1;
+
+        mesh->data[mesh->vertex_count - 1] = *current_vertex;
+    }
+    else
+    {
+        GLushort index = (GLushort)(indexOnArray - mesh->data);
+        mesh->data[index].tangent = vec3_add( &mesh->data[index].tangent,
+                                              &current_vertex->tangent );
+
+        /* We make the index point to the previus vertex added instead of creating a new one */
+        mesh->indices[mesh->index_pointer] = index;
+    }
+
+    mesh->index_pointer += 1;
+}
+
+shape_t* Shape_LoadOBJ(const char* path)
+{
+    OBJ_Mesh mesh;
+    memset( &mesh, 0, sizeof(OBJ_Mesh) );
+
+    vec3_t *positions = NULL;
+    vec3_t *normals = NULL;
+    vec2_t *textures = NULL;
+
+    vertex_t current_vertex;
+
+    unsigned int positions_count = 0, normals_count = 0, textures_count = 0;
+
+    int count = 0, i;
+    int texture[3], normal[3], verts[3];
+
+    FILE *file = fopen(path, "r");
+    if(file == NULL)
+        Util_FatalError("%s file could not be loaded!", path);
+
+    char buffer[BUFFER_size];
+    while( !feof(file) )
+    {
+        fgets(buffer, BUFFER_size, file);
+        switch(buffer[0])
+        {
+        case 'v':
+            if(buffer[1] == 't')
+            {
+                textures = (vec2_t*) realloc(textures, sizeof(vec2_t) * (++textures_count) );
+                count = sscanf(buffer, "vt %f %f\n", &textures[textures_count - 1].x,
+                               &textures[textures_count - 1].y);
+
+                if(count != 2)
+                    Util_FatalError("Bad texture coordinates on .obj file");
+            }
+            else if(buffer[1] == 'n')
+            {
+                normals = (vec3_t*) realloc(normals, sizeof(vec3_t) * (++normals_count) );
+                count = sscanf(buffer, "vn %f %f %f\n", &normals[normals_count - 1].x,
+                               &normals[normals_count - 1].y, &normals[normals_count - 1].z);
+
+                if(count != 3)
+                    Util_FatalError("Bad normals data on .obj file");
+            }
+            else
+            {
+                positions = (vec3_t*) realloc(positions, sizeof(vec3_t) * (++positions_count) );
+                count = sscanf(buffer, "v %f %f %f\n", &positions[positions_count - 1].x,
+                               &positions[positions_count - 1].y, &positions[positions_count - 1].z);
+
+                if(count != 3)
+                    Util_FatalError("Bad vertices data on .obj file");
+            }
+            break;
+        case 'f':
+            mesh.index_count += 3;
+
+            mesh.positions = realloc(mesh.positions, mesh.index_count * sizeof(vec3_t) );
+            mesh.textures = realloc(mesh.textures, mesh.index_count * sizeof(vec2_t) );
+            mesh.normals = realloc(mesh.normals, mesh.index_count * sizeof(vec3_t) );
+
+            count = sscanf(buffer, "f %d/%d/%d %d/%d/%d %d/%d/%d\n",
+                           &verts[0], &texture[0], &normal[0],
+                           &verts[1], &texture[1], &normal[1],
+                           &verts[2], &texture[2], &normal[2]);
+
+            if(count != 9)
+                Util_FatalError("Bad face data on .obj file");
+
+            mesh.positions[mesh.index_count - 3] = positions[ verts[0] - 1 ];
+            mesh.textures[mesh.index_count - 3] = textures[ texture[0] - 1 ];
+            mesh.normals[mesh.index_count - 3] = normals[ normal[0] - 1 ];
+
+            mesh.positions[mesh.index_count - 2] = positions[ verts[1] - 1 ];
+            mesh.textures[mesh.index_count - 2] = textures[ texture[1] - 1 ];
+            mesh.normals[mesh.index_count - 2] = normals[ normal[1] - 1 ];
+
+            mesh.positions[mesh.index_count - 1] = positions[ verts[2] - 1 ];
+            mesh.textures[mesh.index_count - 1] = textures[ texture[2] - 1 ];
+            mesh.normals[mesh.index_count - 1] = normals[ normal[2] - 1 ];
+
+            break;
+        default:
+            break;
+        }
+    }
+
+    mesh.indices = malloc( mesh.index_count * sizeof(GLushort) );
+    mesh.tangents = malloc( mesh.index_count * sizeof(vec3_t) );
+    calculate_tangents(&mesh);
+
+    for(i = 0; i < mesh.index_count; i++)
+    {
+        current_vertex = (vertex_t){.position = mesh.positions[i], .texCoord = mesh.textures[i],
+                                    .normal = mesh.normals[i], .tangent = mesh.tangents[i] };
+        parse_obj_index(&mesh, &current_vertex);
+    }
+
+    for(i = 0; i < mesh.vertex_count; i++)
+    {
+        mesh.data[i].tangent = vec3_normalize(&mesh.data[i].tangent);
+    }
+
+    free(mesh.positions);
+    free(mesh.normals);
+    free(mesh.textures);
+    free(mesh.tangents);
+
+    free(positions);
+    free(textures);
+    free(normals);
+
+    fclose(file);
+
+    GLsizeiptr vertexBuffersize = mesh.vertex_count * sizeof(vertex_t);
+    GLsizeiptr indexBuffersize = mesh.index_count * sizeof(GLushort);
+
+    shape_t* shape = Shape_CreateFromRawData(mesh.data, vertexBuffersize, mesh.indices, indexBuffersize);
+
+    free(mesh.data);
+    free(mesh.indices);
+
+    return shape;
+}
+
+void Shape_Free(shape_t* shape)
+{
+    if(shape)
+    {
+        if(shape->vbo)
+            glDeleteBuffers(1, &shape->vbo);
+        if(shape->ebo)
+            glDeleteBuffers(1, &shape->ebo);
+        if(shape->vao)
+            glDeleteVertexArrays(1, &shape->vao);
+        free(shape);
+    }
+}
diff --git a/08-august/src/renderer/shape.h b/08-august/src/renderer/shape.h
new file mode 100644
index 0000000..8942548
--- /dev/null
+++ b/08-august/src/renderer/shape.h
@@ -0,0 +1,26 @@
+#ifndef SHAPE_H
+#define SHAPE_H
+
+#include "../vertex.h"
+
+typedef struct
+{
+    GLuint num_indices;
+    GLuint vbo, ebo, vao;
+} shape_t;
+
+extern shape_t* Shape_MakeCube();
+extern shape_t* Shape_MakeArrow();
+extern shape_t* Shape_MakeQuad();
+extern shape_t* Shape_MakeSkyBox(float size);
+
+extern shape_t* Shape_LoadOBJ(const char* path);
+
+extern shape_t* Shape_CreateFromRawData(vertex_t* vertices, GLsizeiptr vertexBufferSize,
+                                    GLushort* indices, GLsizeiptr indexBufferSize);
+
+extern void Shape_Free(shape_t* shape);
+
+
+
+#endif // SHAPE_H
diff --git a/08-august/src/renderer/skybox.h b/08-august/src/renderer/skybox.h
new file mode 100644
index 0000000..235ee1a
--- /dev/null
+++ b/08-august/src/renderer/skybox.h
@@ -0,0 +1,16 @@
+#ifndef SKYBOX_H
+#define SKYBOX_H
+
+#include <GL/glew.h>
+#include "shape.h"
+
+#define SKYBOX_ROTATION_SPEED 1.0f
+
+typedef struct
+{
+    GLuint texture;
+    shape_t *cube;
+    GLfloat rotation;
+} skybox_t;
+
+#endif // SKYBOX_H
diff --git a/08-august/src/terrain.c b/08-august/src/terrain.c
new file mode 100644
index 0000000..c3e972a
--- /dev/null
+++ b/08-august/src/terrain.c
@@ -0,0 +1,163 @@
+#include "terrain.h"
+#include "math/math_util.h"
+#include "math/vector3f.h"
+#include "util/util.h"
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+#include <math.h>
+
+#define PLANE_SIZE 128
+#define PLANE_MAX_HEIGHT 10

+

+#include <stdlib.h>
+
+#define NUM_ARRAY_ELEMENTS(a) sizeof(a) / sizeof(*a)
+
+static float GetHeight(int x, int y, SDL_Surface* surface)
+{
+    if(x < 0 || x >= surface->w || y < 0 || y >= surface->h)
+        return 0.0f;
+
+    Uint32 pixel = ( (Uint32*)surface->pixels )[y * surface->w + x];
+    Uint8 r, g, b;
+    SDL_GetRGB(pixel, surface->format, &r, &g, &b);
+
+    float height = (float)r / 255.0f;
+
+    return height * 40.0f;
+}
+
+static vec3_t GenerateNomal(int x, int y, SDL_Surface* surface)
+{
+    float hLeft  = GetHeight(x-1, y, surface);
+    float hRight = GetHeight(x+1, y, surface);
+    float hUp    = GetHeight(x, y+1, surface);
+    float hDown  = GetHeight(x, y-1, surface);
+
+    vec3_t normal = { hLeft - hRight, 2.0f, hDown - hUp};
+    return vec3_normalize(&normal);
+}
+
+GLfloat Terrain_GetHeightOfTerrain(terrain_t* terrain, GLfloat x, GLfloat z)
+{
+    GLfloat terrainX = x - terrain->position.x;
+    GLfloat terrainZ = z - terrain->position.z;
+
+    GLfloat gridSquareSize = (float)terrain->l / ( (float)PLANE_SIZE - 1 );
+
+    GLint gridX = (GLint) floor(terrainX / gridSquareSize);
+    GLint gridZ = (GLint) floor(terrainZ / gridSquareSize);
+
+    if(gridX >= PLANE_SIZE - 1 || gridX < 0 || gridZ >= PLANE_SIZE - 1 || gridZ < 0)
+    {
+        printf("called\n");
+        return 0;
+    }
+
+    GLfloat xCoord = fmod(terrainX, gridSquareSize) / gridSquareSize;
+    GLfloat zCoord = fmod(terrainZ, gridSquareSize) / gridSquareSize;
+    GLfloat answer;
+
+    /* Determine in which triangle of the square are we. "Bary Centric Interpolation"*/
+    if(xCoord <= (1 - zCoord)){
+        /* 0, heights[gridX][gridZ], 0) */
+        vec3_t p1 = { 0, terrain->height[ gridX * PLANE_SIZE + gridZ ], 0 };
+        /* 1, heights[gridX + 1][gridZ], 0) */
+        vec3_t p2 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + gridZ ], 0};
+        /* 0, heights[gridX][gridZ + 1], 1) */
+        vec3_t p3 = { 0, terrain->height[ gridX * PLANE_SIZE + (gridZ + 1) ], 1};
+
+        vec2_t pos = {xCoord, zCoord};
+
+        answer = baryCentric(&p1, &p2, &p3, &pos);
+    } else {
+        /* (1, heights[gridX + 1][gridZ], 0) */
+        vec3_t p1 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + gridZ ], 0 };
+        /* (1, heights[gridX + 1][gridZ + 1], 1) */
+        vec3_t p2 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + (gridZ + 1) ], 1};
+        /* (0, heights[gridX][gridZ + 1], 1) */
+        vec3_t p3 = { 0, terrain->height[ gridX * PLANE_SIZE + (gridZ + 1) ], 1};
+        vec2_t pos = {xCoord, zCoord};
+
+        answer = baryCentric(&p1, &p2, &p3, &pos);
+    }
+
+    return answer;
+}
+
+terrain_t *Terrain_Create( int w, int l, const char* heightmap_path, GLuint blendmap, TerrainTexturePack *textures )
+{
+    terrain_t *terrain = (terrain_t*) malloc( sizeof(terrain_t) );
+    terrain->height = (GLfloat*) malloc( sizeof(GLfloat) * PLANE_SIZE * PLANE_SIZE);
+
+    terrain->blendmap = blendmap;
+    terrain->w = w; terrain->l = l;
+    terrain->textures = *textures;
+
+    SDL_Surface* surface = IMG_Load(heightmap_path);
+    if(surface == NULL)
+        Util_FatalError("Heightmap file could not be loaded\n");
+
+    vertex_t data[PLANE_SIZE * PLANE_SIZE];
+    int x, y;
+    for(x = 0; x < PLANE_SIZE; x++)
+    {
+        for(y = 0; y < PLANE_SIZE; y++)
+        {
+            vertex_t* v = &data[y + x * PLANE_SIZE];
+            v->position = (vec3_t){ (float)x / (float)PLANE_SIZE, 0.0f, (float)y / (float)PLANE_SIZE };
+            /* Heightmap cordinates */
+            int image_x = v->position.x * surface->w, image_y = v->position.z * surface->h;
+
+            v->texCoord = (vec2_t){ v->position.x, v->position.z };
+            GLfloat height = GetHeight(image_x, image_y, surface);
+            terrain->height[y + x * PLANE_SIZE] = height;
+            v->position.y = height;
+            v->position.x *= w;
+            v->position.z *= l;
+
+            v->normal = GenerateNomal(image_x, image_y, surface);
+        }
+    }
+
+    int runner = 0;
+    GLushort indices[ (PLANE_SIZE-1) * (PLANE_SIZE-1) * 6 ];
+    for(x = 0; x < PLANE_SIZE-1; x++)
+    {
+        for(y = 0; y < PLANE_SIZE-1; y++)
+        {
+            indices[runner++] = PLANE_SIZE * x + y;
+            indices[runner++] = PLANE_SIZE * x + y + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE;
+
+            indices[runner++] = PLANE_SIZE * x + y + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE;
+        }
+    }
+
+    GLsizeiptr vertexBufferSize = NUM_ARRAY_ELEMENTS(data) * sizeof(vertex_t);
+    GLsizeiptr indexBufferSize = NUM_ARRAY_ELEMENTS(indices) * sizeof(GLushort);
+
+    SDL_FreeSurface(surface);
+
+    terrain->shape = Shape_CreateFromRawData(data, vertexBufferSize, indices, indexBufferSize);
+    return terrain;
+}
+
+void Terrain_Destroy( terrain_t* terrain )
+{
+    if(terrain->height)
+        free(terrain->height);
+
+    Shape_Free(terrain->shape);
+
+    int i;
+    for(i = 0; i < 4; i++)
+        Texture_Destroy(terrain->textures.texture[i]);
+
+    Texture_Destroy(terrain->blendmap);
+    free(terrain);
+}
+
diff --git a/08-august/src/terrain.h b/08-august/src/terrain.h
new file mode 100644
index 0000000..da9828b
--- /dev/null
+++ b/08-august/src/terrain.h
@@ -0,0 +1,27 @@
+#ifndef TERRAIN_H
+#define TERRAIN_H
+
+#include "renderer/shape.h"
+#include "texture.h"
+
+typedef struct
+{
+    GLuint texture[4];
+} TerrainTexturePack;
+
+typedef struct
+{
+    shape_t *shape;
+    GLuint blendmap;
+    TerrainTexturePack textures;
+
+    GLfloat *height;
+    int w, l;
+    vec3_t position;
+} terrain_t;
+
+extern terrain_t *Terrain_Create( int w, int l, const char* heightmap_path, GLuint blendmap, TerrainTexturePack *textures);
+extern GLfloat Terrain_GetHeightOfTerrain(terrain_t* terrain, GLfloat x, GLfloat z);
+extern void Terrain_Destroy( terrain_t *terrain );
+
+#endif // TERRAIN_H
diff --git a/08-august/src/texture.c b/08-august/src/texture.c
new file mode 100644
index 0000000..d1b70d9
--- /dev/null
+++ b/08-august/src/texture.c
@@ -0,0 +1,71 @@
+#include "texture.h"
+#include "util/util.h"
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+
+GLuint Texture_Create2D( const char *path )
+{
+    GLuint ID;
+    SDL_Surface *data = IMG_Load(path);
+    if(data == NULL)
+        Util_FatalError("Texture %s could not be found!\n", path);
+
+    glGenTextures(1, &ID);
+    glBindTexture(GL_TEXTURE_2D, ID);
+
+    SDL_LockSurface(data);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, data->w, data->h, GL_FALSE, GL_RGBA, GL_UNSIGNED_BYTE, data->pixels);
+    SDL_UnlockSurface(data);
+
+    glGenerateMipmap(GL_TEXTURE_2D);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, -2.4);
+
+    SDL_FreeSurface(data);
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    return ID;
+}
+
+GLuint Texture_CreateCubeMap( const char *paths[6] )
+{
+    GLuint ID;
+    glGenTextures(1, &ID);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, ID);
+
+    SDL_Surface *data;
+
+    int i;
+    for(i = 0; i < 6; i++)
+    {
+        data = IMG_Load(paths[i]);
+
+        if(data == NULL)
+            Util_FatalError("Texture %s could not be found!\n", paths[i]);
+
+        SDL_LockSurface(data);
+
+        /* All the textures sides are linearly stored so we just add "i" */
+        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGBA,
+                     data->w, data->h, GL_FALSE, GL_RGBA, GL_UNSIGNED_BYTE, data->pixels);
+
+        SDL_UnlockSurface(data);
+
+        SDL_FreeSurface(data);
+    }
+
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    return ID;
+}
+
+void Texture_Destroy(GLuint ID)
+{
+    glDeleteTextures(1, &ID);
+}
diff --git a/08-august/src/texture.h b/08-august/src/texture.h
new file mode 100644
index 0000000..ea19124
--- /dev/null
+++ b/08-august/src/texture.h
@@ -0,0 +1,10 @@
+#ifndef TEXTURE_H
+#define TEXTURE_H
+
+#include <GL/glew.h>
+
+extern GLuint Texture_Create2D( const char *path );
+extern GLuint Texture_CreateCubeMap( const char *paths[6] );
+extern void Texture_Destroy( GLuint ID );
+
+#endif // TEXTURE_H
diff --git a/08-august/src/util/util.c b/08-august/src/util/util.c
new file mode 100644
index 0000000..ad0f1ce
--- /dev/null
+++ b/08-august/src/util/util.c
@@ -0,0 +1,87 @@
+#include "util.h"
+
+#include <SDL2/SDL.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+void Util_FatalError( const char *error, ... )
+{
+    fprintf(stderr, "Fatal Error:\n");
+
+    va_list args;
+    va_start(args, error);
+    vfprintf(stderr, error, args);
+    va_end(args);
+
+    SDL_Quit();
+    exit(1);
+}
+
+char *Util_LoadFile( const char *path )
+{
+	FILE* file = fopen( path, "r" );
+
+	if(file == NULL)
+    {
+        Util_FatalError("File %s could not be found!\n", path);
+    }
+
+	fseek( file, 0, SEEK_END );
+	size_t sizeOfFile = ftell( file );
+	fseek( file, 0, SEEK_SET );
+	char* file_data = (char *) malloc( sizeof(char) * sizeOfFile + 1 );
+	fread( file_data, sizeof(char), sizeOfFile, file );
+	file_data[sizeOfFile] = '\0';
+	fclose(file);
+	return file_data;
+}
+
+float Util_RandomF(float min, float max)
+{
+    return ( min + (float)rand() ) / ( (float)RAND_MAX / (max-min) );
+}
+
+int Util_RandomI(int min, int max)
+{
+    return ( rand() % (max-min) ) + min;
+}
+
+vec3_t
+Util_GetMouseRay(int screenWidth, int screenHeigth, mat4_t *viewMatrix, mat4_t *projectionMatrix,
+                 int mouseX, int mouseY)
+{
+    vec4_t eyeCoords;
+    vec3_t mouseRay;
+    /* Normalized device coords NOTE: -y becouse for SDL y = 0 is the top of the screen */
+    GLfloat normalX = ( 2.0f * (GLfloat)mouseX ) / (GLfloat) screenWidth - 1.0f;
+    GLfloat normalY = 1.0f - (2.0f * (GLfloat)mouseY) / (GLfloat) screenHeigth;
+
+    /* clipCoords include 4th component */
+    vec4_t clipCoords = { normalX, normalY, -1.0f, 1.0f };
+
+    /* Remove perpective */
+    {
+        mat4_t invertedProjection = mat4_inverse(projectionMatrix);
+        eyeCoords = mat4_mul_vec4(&invertedProjection, &clipCoords);
+        eyeCoords.z = -1.0f;
+        eyeCoords.w = 0.0f;
+    }
+
+    /* Remove view matrix*/
+    {
+        mat4_t invertedViewMatrix = mat4_inverse(viewMatrix);
+        vec4_t temp = mat4_mul_vec4(&invertedViewMatrix, &eyeCoords);
+
+        mouseRay.x = temp.x;
+        mouseRay.y = temp.y;
+        mouseRay.z = temp.z;
+
+        mouseRay = vec3_normalize(&mouseRay);
+    }
+
+    /* Return the ray in world coordinates */
+    return mouseRay;
+}
diff --git a/08-august/src/util/util.h b/08-august/src/util/util.h
new file mode 100644
index 0000000..7227547
--- /dev/null
+++ b/08-august/src/util/util.h
@@ -0,0 +1,25 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include "../math/matrix4x4.h"
+
+#define toRadians(degrees) (degrees * 3.1415926 / 180.0f)
+#define toDegrees(radians) (radians * 180.0f / 3.1415926)
+
+#ifdef DEBUG
+#include <stdio.h>
+#define myAssert(expr) expr ? 1==1 : fprintf(stderr, "The expresion was not true\n")
+#else
+#define myAssert(expr)
+#endif // DEBUG
+
+extern void Util_FatalError( const char* error, ... );
+extern char* Util_LoadFile( const char* path );
+extern float Util_RandomF(float min, float max);
+extern int Util_RandomI(int min, int max);
+
+extern vec3_t
+Util_GetMouseRay(int screenWidth, int screenHeigth, mat4_t *viewMatrix, mat4_t *projectionMatrix,
+                 int mouseX, int mouseY);
+
+#endif // UTIL_H
diff --git a/08-august/src/util/util_time.c b/08-august/src/util/util_time.c
new file mode 100644
index 0000000..b601379
--- /dev/null
+++ b/08-august/src/util/util_time.c
@@ -0,0 +1,52 @@
+#include "util_time.h"
+
+static struct
+{
+    float max_ticks_per_frame; //< cuantos ticks (tiempo demora) un frame
+    Uint32 counted_frames; //< cuantos frames han pasado
+    Uint32 start_ticks;    //< ticks al iniciar la iteracion del loop
+    Uint32 beg_ticks;      //< ticks desde el inicio del juego
+    Uint32 time_per_frame;
+} TIME = {
+    1000.0f / 60.0f,
+    0, 0, 0, 0
+};
+
+void Time_Init()
+{
+    TIME.beg_ticks = SDL_GetTicks();
+}
+
+void Time_Begin()
+{
+    TIME.start_ticks = SDL_GetTicks();
+}
+
+float Time_End()
+{
+    TIME.counted_frames += 1;
+    float FPS = TIME.counted_frames / ( (float)(SDL_GetTicks() - TIME.beg_ticks) / 1000.f );
+
+    float frameTicks = (float)(SDL_GetTicks() - TIME.start_ticks);
+    TIME.time_per_frame = frameTicks;
+    if(frameTicks < TIME.max_ticks_per_frame){
+        SDL_Delay( (Uint32)(TIME.max_ticks_per_frame - frameTicks) );
+    }
+
+    return FPS;
+}
+
+float Time_GetFrameTime()
+{
+    return (float)TIME.time_per_frame / 1000.0f;
+}
+
+void Time_SetMaxFramesPerSecond(Uint32 frames)
+{
+    TIME.max_ticks_per_frame = 1000.0f / (float)frames;
+}
+
+Uint32 Time_GetCountedFrames()
+{
+    return TIME.counted_frames;
+}
diff --git a/08-august/src/util/util_time.h b/08-august/src/util/util_time.h
new file mode 100644
index 0000000..3c3e470
--- /dev/null
+++ b/08-august/src/util/util_time.h
@@ -0,0 +1,13 @@
+#ifndef UTIL_TIME_H
+#define UTIL_TIME_H
+
+#include <SDL2/SDL.h>
+
+extern void Time_Init( void );
+extern void Time_Begin( void );
+extern float Time_End( void );
+extern void Time_SetMaxFramesPerSecond(Uint32 frames);
+extern float Time_GetFrameTime( void );
+extern Uint32 Time_GetCountedFrames( void );
+
+#endif // UTIL_TIME_H
diff --git a/08-august/src/vertex.h b/08-august/src/vertex.h
new file mode 100644
index 0000000..7ac2ec8
--- /dev/null
+++ b/08-august/src/vertex.h
@@ -0,0 +1,17 @@
+#ifndef VERTEX_H
+#define VERTEX_H
+
+#include <GL/glew.h>
+#include "math/vector2f.h"
+#include "math/vector3f.h"
+#include "math/vector4f.h"
+
+typedef struct
+{
+    vec3_t position;
+    vec2_t texCoord;
+    vec3_t normal;
+    vec3_t tangent;
+} vertex_t;
+
+#endif // VERTEX_H
diff --git a/09-september/Draw.c b/09-september/Draw.c
new file mode 100644
index 0000000..7138fb1
--- /dev/null
+++ b/09-september/Draw.c
@@ -0,0 +1,77 @@
+#include "game.h"
+
+/*We upload all the light vectors*/
+static const Light diffuseLight[4] =
+{
+    /* Sun Light */
+    { {5.0f, 50.0f, 2.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {1.0f, 0.0f, 0.0f} },
+    /* Other lights */
+    { {10.0f, 20.0f, 0.0f}, {1.0f, 0.0f, 0.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+    { {20.0f, 20.0f, 0.0f}, {0.0f, 0.0f, 1.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+    { {30.0f, 20.0f, 0.0f}, {0.0f, 1.0f, 0.0f, 1.0f}, {1.0f, 0.01f, 0.002f} },
+};
+
+void Draw(Game *game)
+{
+    Mat4 viewMatrix, projectedViewMatrix, modelTransform, projectionMatrix;
+    Vec3 pos = {-10.0, 70.0, 10.0};
+    Vec3 viewDirection = {0.22, -0.77, -0.58};
+    Vec3 up = {0.0f, 1.0f, 0.0f};
+
+    Render_BeginFrame();
+    shader_set_uniform_vec3(game->shaderProgram, "World_eyePosition", (float *)&game->camera->position);
+    Render_LoadLights(game->shaderProgram, diffuseLight, 1);
+
+    texture_bind(game->normalMap[1], 13);
+    glUniform1i(game->shaderProgram->Normal_Map, 13);
+
+    viewMatrix = mat4_lookAt(&pos, &viewDirection, &up);
+    projectionMatrix = mat4_orthographic(-50.0f, 50.0f, -50.0f, 50.0f, -50.0f, 70.0f);
+    //
+    projectedViewMatrix = mat4_mul(&projectionMatrix, &viewMatrix);
+
+    Render_DrawEntity(game->shaderProgram, &projectedViewMatrix, &game->player.entity);
+
+    texture_bind(game->normalMap[0], 13);
+    Render_DrawEntity(game->shaderProgram, &projectedViewMatrix, &game->ents[0]);
+
+    Render_EndFrame();
+
+    Vec3 t = {-1.0f, 10.0f, -1.0f};
+    modelTransform = mat4_translate(&t);
+    Mat4 temp = mat4_scale(10.0f, 10.0f, 10.0f);
+    modelTransform = mat4_mul(&modelTransform, &temp);
+    viewMatrix = camera_get_model_to_view_matrix(game->camera);
+    projectionMatrix = game->camera->projectionMatrix;
+    projectedViewMatrix = mat4_mul(&projectionMatrix, &viewMatrix);
+
+    modelTransform = mat4_mul(&projectedViewMatrix, &modelTransform);
+
+    glBindTexture(GL_TEXTURE_2D, render.shadow_map);
+    glUseProgram(render.default_shader->id);
+    glUniform1i(render.default_shader->Texture, 0);
+    glUniformMatrix4fv(render.default_shader->totalTransform, 1, GL_FALSE, modelTransform.data);
+
+    glBindVertexArray(render.default_quad->vao);
+    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    glBindVertexArray(0);
+
+    /*
+    glUseProgram(game->terrainProgram->id);
+
+    shader_set_uniform_vec3(game->terrainProgram, "World_eyePosition", (float *)&game->camera->position);
+    Render_LoadLights(game->terrainProgram, diffuseLight, 1);
+
+    Render_DrawTerrain(game->terrainProgram, &projectedViewMatrix, game->terrain);
+
+    glUseProgram(game->skyboxProgram->id);
+    Render_DrawSky(game->skyboxProgram, &viewMatrix, &game->camera->projectionMatrix, &game->sky);
+
+    glUseProgram(game->particlesProgram->id);
+    Render_DrawParticles(game->particlesProgram, &viewMatrix,
+                         &game->camera->projectionMatrix);
+
+    */
+    glUseProgram(game->shaderProgram->id);
+    window_update(game->window);
+}
diff --git a/09-september/LoadResources.c b/09-september/LoadResources.c
new file mode 100644
index 0000000..5c42f79
--- /dev/null
+++ b/09-september/LoadResources.c
@@ -0,0 +1,136 @@
+#include "game.h"
+
+void CleanUp(Game *game)
+{
+    Terrain_Destroy(game->terrain);
+    Particles_Shutdown();
+    Render_Shutdown();
+}
+
+void LoadResources(Game *game)
+{
+    Render_Init(game->window);
+    Particles_Init();
+
+    Uint32 start = SDL_GetTicks();
+
+    game->shaderProgram = shader_new("shader_program", "resources/shaders/shader.vert",
+                                     "resources/shaders/shader.frag");
+
+    game->terrainProgram = shader_new("terrain_program", "resources/shaders/terrainShader.vert",
+                                      "resources/shaders/terrainShader.frag");
+
+    game->skyboxProgram = shader_new("skybox_program", "resources/shaders/skyboxShader.vert",
+                                     "resources/shaders/skyboxShader.frag");
+
+    game->particlesProgram = shader_new("particles_program", "resources/shaders/particlesShader.vert",
+                                        "resources/shaders/particlesShader.frag");
+    glUseProgram(game->shaderProgram->id);
+
+    Model *entsMesh = model_obj_new("resources/barrel.obj");
+
+    Texture *entsTexture   = texture_new("resources/textures/barrel.png");
+    game->normalMap[0]     = texture_new("resources/textures/bricks_normal.png");
+    game->normalMap[1]     = texture_new("resources/textures/normal_map.png");
+    game->defaultNormalMap = texture_new("resources/textures/default_normal_map.png");
+
+
+    Player_Init(&game->player);
+    game->player.entity.texture = entsTexture;
+    game->player.entity.model = entsMesh;
+
+    {
+        Vec3 position = { 0.0f, 0.0f, 0.0f };
+        float rotation[3] = { 0.0f, 0.0f, 0.0f };
+        game->ents[0].position = position;
+        game->ents[0].rotX = rotation[0];
+        game->ents[0].rotY = rotation[1];
+        game->ents[0].rotZ = rotation[2];
+        game->ents[0].model = model_obj_new("resources/plane3.obj");
+        game->ents[0].texture = texture_new("resources/textures/bricks.png");
+        game->ents[0].index = 0;
+        game->ents[0].scale[0] = 1.0f;
+        game->ents[0].scale[1] = 1.0f;
+        game->ents[0].scale[2] = 1.0f;
+    }
+
+    {
+        Vec3 position = { -400.0f, 0.0f, -400.0f };
+        Texture *blendmap = texture_new("resources/textures/blendmap.png");
+        TerrainTexturePack pack =
+        {
+            {
+                texture_new("resources/textures/soil1.png"),
+                texture_new("resources/textures/soil2.png"),
+                texture_new("resources/textures/soil4.png"),
+                texture_new("resources/textures/soil3.png"),
+            }
+        };
+
+        game->terrain = Terrain_Create(800, 800, "resources/textures/heightmap.png", blendmap, &pack);
+        game->terrain->position = position;
+    }
+
+    {
+        game->sky.rotation = 0.0f;
+        game->sky.cube = mesh_make_skybox(500.0f);
+        const char *paths[6] =
+        {
+            "resources/textures/right.png",
+            "resources/textures/left.png",
+            "resources/textures/top.png",
+            "resources/textures/bottom.png",
+            "resources/textures/back.png",
+            "resources/textures/front.png"
+        };
+        game->sky.texture = texture_cubemap_new(paths);
+    }
+
+    ParticleSystem *sys = Particles_AddSystem();
+    game->s = sys;
+    sys->texture = texture_new("resources/textures/particleStar.png");
+    sys->position = game->player.entity.position;
+    sys->texture->number_of_rows = 1;
+    sys->emit_rate = 1;
+    sys->weight = 0.1f;
+    sys->life_length = 1.0f;
+    sys->speed = 10.0f;
+
+    /* Shader Layouts */
+    Shader *s = game->shaderProgram;
+
+    s->Texture = shader_get_uniform_location(s, "Texture");
+    s->modelToWorld = shader_get_uniform_location(s, "M_model");
+    s->totalTransform = shader_get_uniform_location(s, "M_MVP");
+    s->lightPosition = shader_get_uniform_location(s, "lightPosition");
+    s->lightColor = shader_get_uniform_location(s, "lightColor");
+    s->lightAttenuation = shader_get_uniform_location(s, "attenuation");
+    s->Normal_Map = shader_get_uniform_location(s, "normalMap");
+    s->extra0 = shader_get_uniform_location(s, "number_of_rows");
+    s->extra1 = shader_get_uniform_location(s, "offset");
+
+    s = game->terrainProgram;
+    s->modelToWorld = shader_get_uniform_location(s, "M_model");
+    s->totalTransform = shader_get_uniform_location(s, "M_MVP");
+    s->lightPosition = shader_get_uniform_location(s, "lightPosition");
+    s->lightColor = shader_get_uniform_location(s, "lightColor");
+    s->lightAttenuation = shader_get_uniform_location(s, "attenuation");
+
+    s->extra0 = shader_get_uniform_location(s, "Texture_Background");
+    s->extra1 = shader_get_uniform_location(s, "Texture_R");
+    s->extra2 = shader_get_uniform_location(s, "Texture_G");
+    s->extra3 = shader_get_uniform_location(s, "Texture_B");
+    s->extra4 = shader_get_uniform_location(s, "Texture_BlendMap");
+
+    s = game->skyboxProgram;
+    s->totalTransform = shader_get_uniform_location(s, "M_MVP");
+    s->Texture = shader_get_uniform_location(s, "cubeMap");
+
+    s = game->particlesProgram;
+    s->Texture = shader_get_uniform_location(s, "Texture");
+    s->extra0 = shader_get_uniform_location(s, "number_of_rows");
+
+    fprintf(stderr, "Loading time: %u (ms)\n", SDL_GetTicks() - start);
+
+    Util_CheckGLError();
+}
diff --git a/09-september/Makefile b/09-september/Makefile
new file mode 100644
index 0000000..c6add7a
--- /dev/null
+++ b/09-september/Makefile
@@ -0,0 +1,45 @@
+OBJDIR = obj
+RENDERDIR = tomcat/renderer
+MATHDIR = tomcat/math
+UTILDIR = tomcat/util
+PARTICLESDIR = tomcat/particles
+
+RENDEROBJ = $(RENDERDIR)/camera.o   \
+		    $(RENDERDIR)/entity.o   \
+			$(RENDERDIR)/mesh.o     \
+			$(RENDERDIR)/model.o    \
+			$(RENDERDIR)/renderer.o \
+			$(RENDERDIR)/shader.o  \
+			$(RENDERDIR)/texture.o  \
+			$(RENDERDIR)/window.o
+
+MATHOBJ =  $(MATHDIR)/math_util.o   \
+		   $(MATHDIR)/matrix4x4.o   \
+		   $(MATHDIR)/vector.o
+
+UTILOBJ =  $(UTILDIR)/array.o \
+		   $(UTILDIR)/str.o   \
+           $(UTILDIR)/util.o  \
+		   $(UTILDIR)/util_time.o
+
+PARTICLESOBJ = $(PARTICLESDIR)/particles.o
+
+BASEOBJ = tomcat/input.o tomcat/terrain.o
+
+OBJS = main.o Draw.o LoadResources.o ProcessInput.o player.o $(RENDEROBJ) \
+	   $(MATHOBJ) $(UTILOBJ) $(PARTICLESOBJ) $(BASEOBJ)
+
+TARGET = game
+CFLAGS = -g -std=c99 -Wall
+LDFLAGS = -lSDL2 -lSDL2_image -lGL -lGLEW -lm
+
+all: $(OBJS)
+	$(CC) $(LDFLAGS) $(OBJS) -o $(TARGET)
+
+%.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+
+.PHONY: clean
+clean:
+	@rm -f $(OBJS) $(TARGET)
diff --git a/09-september/ProcessInput.c b/09-september/ProcessInput.c
new file mode 100644
index 0000000..0f088f8
--- /dev/null
+++ b/09-september/ProcessInput.c
@@ -0,0 +1,47 @@
+#include "game.h"
+#include <string.h>
+
+void ProcessInput(Game *game)
+{
+    static Vec2 mousePosition;
+    SDL_Event e;
+
+    while(SDL_PollEvent(&e))
+    {
+        switch(e.type)
+        {
+        case SDL_QUIT:
+            game->gameState = EXIT;
+            break;
+
+        case SDL_MOUSEMOTION:
+            mousePosition.x = (GLfloat) e.motion.x;
+            mousePosition.y = (GLfloat) e.motion.y;
+            camera_mouse_update(game->camera, &mousePosition);
+            break;
+
+        case SDL_KEYDOWN:
+            Input_PressKey(e.key.keysym.scancode);
+            break;
+
+        case SDL_KEYUP:
+            Input_ReleaseKey(e.key.keysym.scancode);
+            break;
+        }
+
+        if(Input_isKeyPressed(SDL_SCANCODE_UP))
+            camera_move_foward(game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_DOWN))
+            camera_move_backward(game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_LEFT))
+            camera_move_left(game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_RIGHT))
+            camera_move_right(game->camera);
+
+        if(Input_isKeyPressed(SDL_SCANCODE_ESCAPE))
+            game->gameState = EXIT;
+    }
+}
diff --git a/09-september/game.h b/09-september/game.h
new file mode 100644
index 0000000..3225d39
--- /dev/null
+++ b/09-september/game.h
@@ -0,0 +1,54 @@
+#ifndef GAME_H
+#define GAME_H
+
+#include "tomcat/renderer/camera.h"
+#include "player.h"
+#include "tomcat/terrain.h"
+
+#include "tomcat/math/vector.h"
+#include "tomcat/math/matrix4x4.h"
+
+#include "tomcat/input.h"
+
+#include "tomcat/util/util.h"
+#include "tomcat/util/util_time.h"
+#include "tomcat/renderer/renderer_types.h"
+#include "tomcat/renderer/window.h"
+
+typedef enum
+{
+    MENU,
+    RUNNING,
+    EXIT
+}GameState;
+
+#define NUM_ENTITIES 1
+
+#define WINDOW_WIDTH 1024
+#define WINDOW_HEIGHT 768
+#define WINDOW_ASPECT_RATIO (float)WINDOW_WIDTH / (float)WINDOW_HEIGHT
+
+typedef struct _Game
+{
+    GameState gameState;
+    Shader *shaderProgram, *terrainProgram, *skyboxProgram, *particlesProgram;
+
+    Entity ents[NUM_ENTITIES];
+    Texture *normalMap[2];
+    Texture *defaultNormalMap;
+    Terrain *terrain;
+    Skybox sky;
+
+    Player player;
+
+    Camera *camera;
+    Window *window;
+    ParticleSystem *s;
+} Game;
+
+extern void LoadResources(Game *game);
+extern void Draw(Game *game);
+extern void ProcessInput(Game *game);
+extern void CleanUp(Game *game);
+
+#endif // GAME_H
diff --git a/09-september/main.c b/09-september/main.c
new file mode 100644
index 0000000..0f6ee58
--- /dev/null
+++ b/09-september/main.c
@@ -0,0 +1,61 @@
+#include "game.h"
+
+/**
+    TODO:   Shadows
+            Fix timing
+            Scenes
+            Materials
+            Text
+            Fix particle emission rate
+
+            +improve skybox
+            |
+            +->fog
+            +->day/night
+
+            +mouse picking (is it working perfectly?)
+
+            +add cell shading?
+
+            improve math package
+            repair gui on renderer.c
+            improve shape loading (normal generation) (support other formats)
+**/
+
+int main(int args, char *argv[])
+{
+    SDL_Init(SDL_INIT_EVERYTHING);
+
+    Game game;
+    game.gameState = RUNNING;
+    game.window = window_new("Test", WINDOW_WIDTH, WINDOW_HEIGHT);
+
+    game.camera = camera_new();
+    game.camera->projectionMatrix = mat4_perspective(60.0f, WINDOW_ASPECT_RATIO, 0.1f, 900.0f);
+
+    LoadResources(&game);
+
+    Time_Init();
+    SDL_GL_SetSwapInterval(1);
+    Time_SetMaxFramesPerSecond(60);
+    while(game.gameState != EXIT)
+    {
+        Time_Begin();
+        ProcessInput(&game);
+        Player_Update(&game.player, game.terrain);
+        Particles_Update(&game.camera->position);
+        Draw(&game);
+
+        float FPS = Time_End();
+
+        if( !( Time_GetCountedFrames() % (int)FPS ) )
+        {
+            fprintf(stderr, "FPS: %.4f\n", FPS);
+        }
+    }
+
+    window_destroy(game.window);
+    CleanUp(&game);
+    SDL_Quit();
+    return 0;
+}
diff --git a/09-september/player.c b/09-september/player.c
new file mode 100644
index 0000000..9258058
--- /dev/null
+++ b/09-september/player.c
@@ -0,0 +1,66 @@
+#include "player.h"
+#include "tomcat/util/util_time.h"
+#include "tomcat/input.h"
+#include "tomcat/util/util.h"
+
+#define MAX_MOVEMENT_SPEED 10
+#define MAX_ROTATION_SPEED 100
+#define GRAVITY -15
+#define JUMP_POWER 7
+
+static void jump(Player *player)
+{
+    player->verticalSpeed = JUMP_POWER;
+}
+
+static void check_input(Player *player)
+{
+    if(Input_isKeyPressed(SDL_SCANCODE_W)) {
+        player->speed = MAX_MOVEMENT_SPEED;
+    } else if(Input_isKeyPressed(SDL_SCANCODE_S)) {
+        player->speed = -MAX_MOVEMENT_SPEED;
+    } else {
+        player->speed = 0.0f;
+    }
+
+    if(Input_isKeyPressed(SDL_SCANCODE_A)) {
+        player->turnSpeed = MAX_ROTATION_SPEED;
+    } else if(Input_isKeyPressed(SDL_SCANCODE_D)) {
+        player->turnSpeed = -MAX_ROTATION_SPEED;
+    } else {
+        player->turnSpeed = 0.0f;
+    }
+
+    if(Input_isKeyPressed(SDL_SCANCODE_SPACE)) {
+        jump(player);
+    }
+}
+
+void Player_Init(Player *player)
+{
+    Entity *e = &player->entity;
+    memset(player, 0, sizeof(Player));
+    e->position = (Vec3){ 0.0f, 35.0f, 0.0f };
+    e->scale[0] = 1.0f;
+    e->scale[1] = 1.0f;
+    e->scale[2] = 1.0f;
+}
+
+void Player_Update(Player *player, Terrain *terrain)
+{
+    check_input(player);
+    player->entity.rotY += player->turnSpeed * Time_GetFrameTime();
+    player->entity.position.x += SDL_sinf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
+    player->entity.position.z += SDL_cosf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
+
+    /*
+    player->verticalSpeed += GRAVITY * Time_GetFrameTime();
+    player->entity.position.y += player->verticalSpeed * Time_GetFrameTime();
+    */
+
+    GLfloat terrainHeight = Terrain_GetHeightOfTerrain(terrain, player->entity.position.x, player->entity.position.z);
+    if(player->entity.position.y - 1.0f < terrainHeight) {
+        //player->entity.position.y = terrainHeight + 1.0f;
+        //player->verticalSpeed = 0.0f;
+    }
+}
diff --git a/09-september/player.h b/09-september/player.h
new file mode 100644
index 0000000..146bf03
--- /dev/null
+++ b/09-september/player.h
@@ -0,0 +1,17 @@
+#ifndef PLAYER_H
+#define PLAYER_H
+
+#include "tomcat/renderer/renderer.h"
+#include "tomcat/math/vector.h"
+#include "tomcat/terrain.h"
+
+typedef struct
+{
+    Entity entity;
+    float speed, turnSpeed, verticalSpeed;
+} Player;
+
+extern void Player_Init(Player *player);
+extern void Player_Update(Player *player, Terrain *terrain);
+
+#endif // PLAYER_H
diff --git a/09-september/resources/barrel.obj b/09-september/resources/barrel.obj
new file mode 100644
index 0000000..70b1ccc
--- /dev/null
+++ b/09-september/resources/barrel.obj
@@ -0,0 +1,4970 @@
+# Blender v2.67 (sub 0) OBJ File: 'Wooden Barrel.blend'
+# www.blender.org
+o Mesh_Mesh_Cylinder.001
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diff --git a/09-september/resources/boulder.obj b/09-september/resources/boulder.obj
new file mode 100755
index 0000000..d993ab0
--- /dev/null
+++ b/09-september/resources/boulder.obj
@@ -0,0 +1,1166 @@
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diff --git a/09-september/resources/crate.obj b/09-september/resources/crate.obj
new file mode 100644
index 0000000..5954600
--- /dev/null
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+f 118/21/2 57/20/2 28/22/2
+f 65/18/4 166/19/4 105/17/4
+f 35/19/4 67/18/4 38/21/4
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+f 113/22/4 108/15/4 104/17/4
+f 181/24/6 147/53/6 42/25/6
+f 41/53/6 183/24/6 79/27/6
+f 26/28/6 44/54/6 43/27/6
+f 82/54/6 178/28/6 94/25/6
+f 46/36/8 176/29/8 45/31/8
+f 141/31/8 111/30/8 156/33/8
+f 157/33/8 128/32/8 135/35/8
+f 136/35/8 207/34/8 144/36/8
+f 127/38/10 49/55/10 50/39/10
+f 74/55/10 129/38/10 51/41/10
+f 31/42/10 52/56/10 71/41/10
+f 63/56/10 60/42/10 76/39/10
+f 68/32/11 99/33/11 189/35/11
+f 182/30/11 163/31/11 100/33/11
+f 91/29/11 56/36/11 164/31/11
+f 61/34/11 190/35/11 211/36/11
+f 152/46/10 213/43/9 193/45/9
+f 116/46/11 3/43/11 214/44/11
+f 188/44/6 117/45/5 201/43/5
+f 194/46/8 200/43/8 120/45/8
+f 5/50/8 36/47/8 161/49/8
+f 162/50/6 168/43/5 185/49/5
+f 112/48/11 8/49/11 186/50/11
+f 139/50/10 114/47/9 103/49/9
+f 9/50/8 95/47/8 10/49/8
+f 170/46/2 148/43/1 11/45/1
+f 83/50/11 215/47/11 209/48/11
+f 216/48/4 84/49/3 160/47/3
+f 149/46/10 143/43/9 14/45/9
+f 196/48/2 142/49/1 15/47/1
+f 155/48/6 158/49/5 16/47/5
+f 134/48/4 137/49/3 150/47/3
+f 73/44/11 85/45/11 197/46/11
+f 86/48/2 75/49/1 87/47/1
+f 88/48/8 72/49/8 20/47/8
+f 124/50/4 64/47/3 198/49/3
+f 171/50/6 54/47/5 22/49/5
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+f 122/48/10 165/49/9 173/47/9
+f 174/50/4 212/43/3 172/49/3
diff --git a/09-september/resources/cube.mtl b/09-september/resources/cube.mtl
new file mode 100644
index 0000000..39ad3d3
--- /dev/null
+++ b/09-september/resources/cube.mtl
@@ -0,0 +1,13 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl Material
+Ns 96.078431
+Ka 1.000000 1.000000 1.000000
+Kd 0.640000 0.640000 0.640000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2
+map_Ks  .
diff --git a/09-september/resources/cube.obj b/09-september/resources/cube.obj
new file mode 100644
index 0000000..65343b2
--- /dev/null
+++ b/09-september/resources/cube.obj
@@ -0,0 +1,50 @@
+# Blender v2.77 (sub 0) OBJ File: ''
+# www.blender.org
+mtllib cube.mtl
+o Cube
+v 1.000000 -1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v -1.000000 -1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -0.999999
+v 0.999999 1.000000 1.000001
+v -1.000000 1.000000 1.000000
+v -1.000000 1.000000 -1.000000
+vt 0.0000 0.6667
+vt 0.3333 0.6667
+vt 0.3333 1.0000
+vt 0.0000 1.0000
+vt 0.6667 0.3333
+vt 0.6667 0.6667
+vt 0.3333 0.6667
+vt 0.3333 0.3333
+vt 0.6667 0.3333
+vt 0.3333 0.3333
+vt 0.3333 0.0000
+vt 0.6667 0.0000
+vt 0.0000 0.3333
+vt 0.0000 0.0000
+vt 0.3333 0.0000
+vt 0.3333 0.3333
+vt 1.0000 0.3333
+vt 0.6667 0.3333
+vt 0.6667 0.0000
+vt 1.0000 0.0000
+vt 0.0000 0.3333
+vt 0.3333 0.3333
+vt 0.3333 0.6667
+vt 0.0000 0.6667
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+vn 1.0000 0.0000 0.0000
+vn -0.0000 -0.0000 1.0000
+vn -1.0000 -0.0000 -0.0000
+vn 0.0000 0.0000 -1.0000
+usemtl Material
+s off
+f 1/1/1 2/2/1 3/3/1 4/4/1
+f 5/5/2 8/6/2 7/7/2 6/8/2
+f 1/9/3 5/10/3 6/11/3 2/12/3
+f 2/13/4 6/14/4 7/15/4 3/16/4
+f 3/17/5 7/18/5 8/19/5 4/20/5
+f 5/21/6 1/22/6 4/23/6 8/24/6
diff --git a/09-september/resources/plane3.obj b/09-september/resources/plane3.obj
new file mode 100644
index 0000000..b663241
--- /dev/null
+++ b/09-september/resources/plane3.obj
@@ -0,0 +1,55 @@
+# Blender v2.77 (sub 0) OBJ File: 'plane3.obj'
+# www.blender.org
+mtllib plane3.mtl
+o Cube.001
+v 8.045116 -0.023363 -8.045115
+v 8.045116 -0.023363 8.045116
+v -8.045117 -0.023363 8.045115
+v -8.045114 -0.023363 -8.045119
+v 8.045120 0.023363 -8.045112
+v -8.045115 0.023363 -8.045116
+v -8.045119 0.023363 8.045114
+v 8.045111 0.023363 8.045121
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 0.0000 0.0000
+vt 1.0000 1.0000
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 1.0000 1.0000
+vt 1.0000 1.0000
+vt 1.0000 1.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vn 0.0000 -1.0000 -0.0000
+vn -0.0000 1.0000 0.0000
+vn 1.0000 -0.0001 0.0000
+vn 1.0000 0.0001 0.0000
+vn -0.0000 -0.0001 1.0000
+vn -0.0000 0.0000 1.0000
+vn -1.0000 -0.0000 -0.0000
+vn -1.0000 -0.0001 -0.0000
+vn 0.0000 0.0001 -1.0000
+usemtl Material.001
+s 1
+f 2/1/1 4/2/1 1/3/1
+f 6/4/2 8/5/2 5/6/2
+f 5/7/3 2/8/4 1/3/3
+f 8/9/5 3/10/6 2/11/5
+f 3/12/7 6/13/8 4/2/8
+f 1/14/9 6/15/9 5/6/9
+f 2/1/1 3/16/1 4/2/1
+f 6/4/2 7/17/2 8/5/2
+f 5/7/3 8/18/4 2/8/4
+f 8/9/5 7/17/6 3/10/6
+f 3/12/7 7/19/7 6/13/8
+f 1/14/9 4/20/9 6/15/9
diff --git a/09-september/resources/shaders/particlesShader.frag b/09-september/resources/shaders/particlesShader.frag
new file mode 100644
index 0000000..117128b
--- /dev/null
+++ b/09-september/resources/shaders/particlesShader.frag
@@ -0,0 +1,12 @@
+#version 420
+
+in vec2 Fragment_UV;
+
+out vec4 out_color;
+
+uniform sampler2D Texture;
+
+void main()
+{
+    out_color = texture(Texture, Fragment_UV);
+}
diff --git a/09-september/resources/shaders/particlesShader.vert b/09-september/resources/shaders/particlesShader.vert
new file mode 100644
index 0000000..2b1ad60
--- /dev/null
+++ b/09-september/resources/shaders/particlesShader.vert
@@ -0,0 +1,18 @@
+#version 420
+
+in layout(location=0) vec3 position; /* vertex position in model coordinates */
+in layout(location=1) vec2 offset; /* xy coordinates offset for atlases */
+in layout(location=2) mat4 M_MVP;
+
+out vec2 Fragment_UV; /* UV coordinates for the fragment */
+
+uniform float number_of_rows; /* For texture atlases */
+
+void main()
+{
+    gl_Position = M_MVP * vec4(position, 1.0);
+
+    Fragment_UV = position.xy + vec2(0.5, 0.5);
+    Fragment_UV.y = 1.0 - Fragment_UV.y;
+    Fragment_UV = (Fragment_UV / number_of_rows ) + offset;
+}
diff --git a/09-september/resources/shaders/passShader.frag b/09-september/resources/shaders/passShader.frag
new file mode 100644
index 0000000..554adc5
--- /dev/null
+++ b/09-september/resources/shaders/passShader.frag
@@ -0,0 +1,11 @@
+#version 420
+
+in vec2 Fragment_Uv;
+out vec4 out_color;
+
+uniform sampler2D Texture;
+
+void main()
+{
+    out_color = texture(Texture, Fragment_Uv);
+}
diff --git a/09-september/resources/shaders/passShader.vert b/09-september/resources/shaders/passShader.vert
new file mode 100644
index 0000000..5ac718e
--- /dev/null
+++ b/09-september/resources/shaders/passShader.vert
@@ -0,0 +1,12 @@
+#version 420
+
+in layout(location=0) vec3 Model_Position;
+out vec2 Fragment_Uv;
+
+uniform mat4 M_MVP;
+
+void main()
+{
+    Fragment_Uv = vec2( (Model_Position.x + 1.0)/2.0, (Model_Position.y + 1.0)/2.0 );
+    gl_Position = M_MVP * vec4(Model_Position, 1.0);
+}
diff --git a/09-september/resources/shaders/shader.frag b/09-september/resources/shaders/shader.frag
new file mode 100644
index 0000000..44e579c
--- /dev/null
+++ b/09-september/resources/shaders/shader.frag
@@ -0,0 +1,56 @@
+#version 420
+
+in vec2 Fragment_UV;
+in vec4 Fragment_Color;
+in vec3 toLightVector[4];
+in vec3 toEyeVector;
+
+layout(location = 0) out vec4 out_color;
+
+uniform vec4 lightColor[4];
+uniform vec3 attenuation[4];
+uniform sampler2D Texture;
+uniform sampler2D normalMap;
+
+void main()
+{
+    vec4 totalDiffuse = vec4(0.0, 0.0, 0.0, 1.0);
+    vec4 totalSpecular = vec4(0.0, 0.0, 0.0, 1.0);
+
+    /* We get the normal from the normal map and we transform it into world space */
+    vec3 normal = normalize( (255.0 / 128.0 * texture(normalMap, Fragment_UV) - 1.0).xyz );
+
+    for(int i = 0; i < 4; i++)
+    {
+        /*Light Attenuation*/
+        float dist = length(toLightVector[i]);
+        float attFactor = attenuation[i].x + (attenuation[i].y * dist) + (attenuation[i].z * dist * dist);
+        vec3 unitToLightVector = normalize(toLightVector[i]);
+
+        /*Diffuse lighting*/
+
+        /*La intensidad es el cos entre la normal y el vector hacia la luz*/
+        float brightness = dot(unitToLightVector, normalize(normal));
+        /*No queremos luz negativa ni mayor a 1*/
+        brightness = max(brightness, 0.0);
+        totalDiffuse = totalDiffuse + (brightness * lightColor[i]) / attFactor;
+
+        /* Specular lighting */
+
+        /* Reflejamos el vector hacia la luz (su inverso) en la normal */
+        vec3 Vector_ReflectedLight = reflect(-unitToLightVector, normal);
+
+        /* La luz especular es el cos del angulo entre el vector hacia el ojo y la luz reflectada en la normal */
+        float specularity = clamp( dot(Vector_ReflectedLight, toEyeVector), 0, 1 );
+        float reflectivity = 0.5;
+        /* Que tan grande es el specular highlight */
+        specularity = pow(specularity, 10);
+        totalSpecular = totalSpecular + clamp( reflectivity * specularity * lightColor[i], 0, 1)  / attFactor;
+    }
+
+    /* Ambient Light */
+    totalDiffuse = max(totalDiffuse, 0.2);
+
+    /* Juntamos todo para el color final*/
+    out_color = totalDiffuse * texture(Texture, Fragment_UV) + totalSpecular;
+}
diff --git a/09-september/resources/shaders/shader.vert b/09-september/resources/shaders/shader.vert
new file mode 100644
index 0000000..69a30e0
--- /dev/null
+++ b/09-september/resources/shaders/shader.vert
@@ -0,0 +1,52 @@
+#version 420
+
+in layout(location=0) vec3 position;
+in layout(location=1) vec2 Texture_UV;
+in layout(location=2) vec3 normal;
+in layout(location=3) vec3 tangent;
+
+uniform mat4 M_MVP;   /* Total Transform matrix */
+uniform mat4 M_model; /* Model to world space transformation matrix */
+
+uniform vec3 lightPosition[4];
+uniform vec3 World_eyePosition;
+
+uniform float number_of_rows;
+uniform vec2 offset;
+
+out vec2 Fragment_UV;
+out vec4 Fragment_Color;
+out vec3 toLightVector[4];
+out vec3 toEyeVector;
+
+void main()
+{
+    /*We add a 0 on the vec4 so we can remove the translation from the matrix
+	(WE DONT WANT THE NORMAL TO BE TRANSLATED) */
+	vec3 n = normalize( (M_model * vec4(normal, 0.0)).xyz );
+	vec3 t = normalize( (M_model * vec4(tangent, 0.0)).xyz );
+
+	/* Orthogonalization */
+	t = normalize(t - dot(t, n) * n);
+
+	vec3 biTangent = normalize( cross(t, n) );
+
+    /* Matrix use by normal mapping */
+	mat3 tbnMatrix = mat3(t, biTangent, n);
+	tbnMatrix = transpose(tbnMatrix);
+
+	vec3 World_Position = vec3(M_model * vec4(position, 1.0));
+
+    for(int i = 0; i < 4; i++)
+    {
+        /* vector que apunta hacia la luz*/
+        toLightVector[i] = tbnMatrix * (lightPosition[i] - World_Position);
+    }
+    /* Vector hacia el ojo*/
+    toEyeVector = normalize( tbnMatrix * (World_eyePosition - World_Position) );
+
+    gl_Position = M_MVP * vec4(position, 1.0);
+
+    Fragment_UV = vec2(Texture_UV.x, 1 - Texture_UV.y); /*Invert y axis*/
+    Fragment_UV = (Fragment_UV / number_of_rows) + offset;
+}
diff --git a/09-september/resources/shaders/shadow_shader.frag b/09-september/resources/shaders/shadow_shader.frag
new file mode 100644
index 0000000..7e29624
--- /dev/null
+++ b/09-september/resources/shaders/shadow_shader.frag
@@ -0,0 +1,5 @@
+#version 420
+
+void main()
+{
+}
diff --git a/09-september/resources/shaders/shadow_shader.vert b/09-september/resources/shaders/shadow_shader.vert
new file mode 100644
index 0000000..f68dd74
--- /dev/null
+++ b/09-september/resources/shaders/shadow_shader.vert
@@ -0,0 +1,10 @@
+#version 420
+
+in layout(location=0) vec3 position; /* vertex position in model coordinates */
+
+uniform mat4 M_MVP;
+
+void main()
+{
+    gl_Position = M_MVP * vec4(position, 1.0);
+}
diff --git a/09-september/resources/shaders/skyboxShader.frag b/09-september/resources/shaders/skyboxShader.frag
new file mode 100644
index 0000000..99dcde3
--- /dev/null
+++ b/09-september/resources/shaders/skyboxShader.frag
@@ -0,0 +1,11 @@
+#version 420
+
+in vec3 Fragment_UV;
+out vec4 out_color;
+
+uniform samplerCube cubeMap;
+
+void main()
+{
+    out_color = texture(cubeMap, Fragment_UV);
+}
diff --git a/09-september/resources/shaders/skyboxShader.vert b/09-september/resources/shaders/skyboxShader.vert
new file mode 100644
index 0000000..3286875
--- /dev/null
+++ b/09-september/resources/shaders/skyboxShader.vert
@@ -0,0 +1,12 @@
+#version 420
+
+in layout(location=0) vec3 position; /* vertex position in model coordinates */
+out vec3 Fragment_UV;                /* UV coordinates for the fragment */
+
+uniform mat4 M_MVP;
+
+void main()
+{
+    gl_Position = M_MVP * vec4(position, 1.0);
+    Fragment_UV = position;
+}
diff --git a/09-september/resources/shaders/terrainShader.frag b/09-september/resources/shaders/terrainShader.frag
new file mode 100644
index 0000000..21623bb
--- /dev/null
+++ b/09-september/resources/shaders/terrainShader.frag
@@ -0,0 +1,72 @@
+#version 420
+
+in vec2 Fragment_UV;
+in vec3 normal0;
+in vec3 toLightVector[4];
+in vec3 toEyeVector;
+
+out vec4 out_color;
+
+uniform vec4 lightColor[4];
+uniform vec3 attenuation[4];
+uniform vec3 World_eyePosition;
+
+uniform sampler2D Texture_Background;
+uniform sampler2D Texture_R;
+uniform sampler2D Texture_G;
+uniform sampler2D Texture_B;
+uniform sampler2D Texture_BlendMap;
+
+void main()
+{
+    vec4 totalDiffuse = vec4(0.0, 0.0, 0.0, 1.0);
+    vec4 totalSpecular = vec4(0.0, 0.0, 0.0, 1.0);
+
+    for(int i = 0; i < 4; i++)
+    {
+        /*Light Attenuation*/
+        float dist = length(toLightVector[i]);
+        float attFactor = attenuation[i].x + (attenuation[i].y * dist) + (attenuation[i].z * dist * dist);
+        vec3 unitToLightVector = normalize(toLightVector[i]);
+        /*Diffuse lighting*/
+
+        /*La intensidad es el cos entre la normal y el vector hacia la luz*/
+        float brightness = dot(unitToLightVector, normalize(normal0));
+        /*No queremos luz negativa ni mayor a 1*/
+        brightness = max(brightness, 0.0);
+        totalDiffuse = totalDiffuse + (brightness * lightColor[i]) / attFactor;
+
+        /* Specular lighting */
+
+        /* Reflejamos el vector hacia la luz (su inverso) en la normal */
+        vec3 Vector_ReflectedLight = reflect(-unitToLightVector, normal0);
+
+        /* La luz especular es el cos del angulo entre el vector hacia el ojo y la luz reflectada en la normal */
+        float specularity = clamp( dot(Vector_ReflectedLight, toEyeVector), 0, 1 );
+        float reflectivity = 0.5;
+        /* Que tan grande es el specular highlight */
+        specularity = pow(specularity, 10);
+        totalSpecular = totalSpecular + clamp( reflectivity * specularity * lightColor[i], 0, 1) / attFactor;
+    }
+
+    /* Ambient Light */
+    totalDiffuse = max(totalDiffuse, 0.2);
+
+    /*Terrain color*/
+    /*The color of the current fragment from the blendmap*/
+    vec4 blendMapColor = texture(Texture_BlendMap, Fragment_UV);
+    /*We want the background color when we have black in the blend map*/
+    float backTextureAmount = 1 - (blendMapColor.r + blendMapColor.g + blendMapColor.b);
+    /*So we dont lose image quality from the tiles textures (Fragment_UV make the terrain look less HD)*/
+    vec2 Tiled_UV = Fragment_UV * 50.0f;
+    /*We get the color of each map tile (soil1, soil2, etc)*/
+    vec4 backgroundTextureColor = texture(Texture_Background, Tiled_UV) * backTextureAmount;
+    vec4 rTextureColor = texture(Texture_R, Tiled_UV) * blendMapColor.r;
+    vec4 gTextureColor = texture(Texture_G, Tiled_UV) * blendMapColor.g;
+    vec4 bTextureColor = texture(Texture_B, Tiled_UV) * blendMapColor.b;
+    /*We mix them corresponding with the blendmap*/
+    vec4 totalColor = backgroundTextureColor + rTextureColor + gTextureColor + bTextureColor;
+
+    /*Our final color for the fragment*/
+    out_color =  totalDiffuse * totalColor + totalSpecular;
+}
diff --git a/09-september/resources/shaders/terrainShader.vert b/09-september/resources/shaders/terrainShader.vert
new file mode 100644
index 0000000..1850947
--- /dev/null
+++ b/09-september/resources/shaders/terrainShader.vert
@@ -0,0 +1,39 @@
+#version 420
+
+in layout(location=0) vec3 position; /* vertex position in model space */
+in layout(location=1) vec2 Texture_UV;
+in layout(location=2) vec3 normal;   /* vertex normal in model space */
+in layout(location=3) vec3 tangent;
+
+uniform mat4 M_MVP;     /* Total Transform matrix */
+uniform mat4 M_model;   /* Model to world space transformation matrix */
+
+uniform vec3 lightPosition[4];
+uniform vec3 World_eyePosition;
+
+out vec2 Fragment_UV;               /* UV coordinates for the fragment */
+out vec3 normal0;
+out vec4 Fragment_Color;
+out vec3 toLightVector[4];
+out vec3 toEyeVector;
+
+void main()
+{
+    vec3 World_Position = vec3(M_model * vec4(position, 1.0));
+
+    for(int i = 0; i < 4; i++)
+    {
+        /* vector que apunta hacia la luz*/
+        toLightVector[i] = lightPosition[i] - World_Position;
+    }
+    /* Vector hacia el ojo*/
+    toEyeVector = normalize(World_eyePosition - World_Position);
+
+	gl_Position = M_MVP * vec4(position, 1.0);
+
+	Fragment_UV = vec2(Texture_UV.x, 1 - Texture_UV.y); /*Invert y axis*/
+
+	/*We add a 0 on the vec4 so we can remove the translation from the matrix
+	(WE DONT WANT THE NORMAL TO BE TRANSLATED) */
+	normal0 = normalize( (M_model * vec4(normal, 0.0)).xyz );
+}
diff --git a/09-september/resources/stall.obj b/09-september/resources/stall.obj
new file mode 100644
index 0000000..210f90b
--- /dev/null
+++ b/09-september/resources/stall.obj
@@ -0,0 +1,1696 @@
+# Blender v2.67 (sub 0) OBJ File: 'stall.blend'
+# www.blender.org
+o Cube
+v 3.227124 -0.065127 -1.000000
+v 3.227124 -0.065127 1.000000
+v -3.227125 -0.065127 1.000000
+v -3.227123 -0.065127 -1.000000
+v 3.227126 1.934873 -0.999999
+v 3.227122 1.934873 1.000001
+v -3.227126 1.934873 1.000000
+v -3.227124 1.934873 -1.000000
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diff --git a/09-september/resources/textures/back.png b/09-september/resources/textures/back.png
new file mode 100644
index 0000000..3fd0158
--- /dev/null
+++ b/09-september/resources/textures/back.png
diff --git a/09-september/resources/textures/barrel.png b/09-september/resources/textures/barrel.png
new file mode 100644
index 0000000..baf502b
--- /dev/null
+++ b/09-september/resources/textures/barrel.png
diff --git a/09-september/resources/textures/blendmap.png b/09-september/resources/textures/blendmap.png
new file mode 100644
index 0000000..4789845
--- /dev/null
+++ b/09-september/resources/textures/blendmap.png
diff --git a/09-september/resources/textures/bottom.png b/09-september/resources/textures/bottom.png
new file mode 100644
index 0000000..8f9c0f2
--- /dev/null
+++ b/09-september/resources/textures/bottom.png
diff --git a/09-september/resources/textures/boulder.png b/09-september/resources/textures/boulder.png
new file mode 100755
index 0000000..e2cb9d1
--- /dev/null
+++ b/09-september/resources/textures/boulder.png
diff --git a/09-september/resources/textures/boulderNormal.png b/09-september/resources/textures/boulderNormal.png
new file mode 100755
index 0000000..cc6069a
--- /dev/null
+++ b/09-september/resources/textures/boulderNormal.png
diff --git a/09-september/resources/textures/bricks.png b/09-september/resources/textures/bricks.png
new file mode 100644
index 0000000..25e3eeb
--- /dev/null
+++ b/09-september/resources/textures/bricks.png
diff --git a/09-september/resources/textures/bricks2.png b/09-september/resources/textures/bricks2.png
new file mode 100644
index 0000000..cf44650
--- /dev/null
+++ b/09-september/resources/textures/bricks2.png
diff --git a/09-september/resources/textures/bricks2_normal.png b/09-september/resources/textures/bricks2_normal.png
new file mode 100644
index 0000000..72b6a2d
--- /dev/null
+++ b/09-september/resources/textures/bricks2_normal.png
diff --git a/09-september/resources/textures/bricks_normal.png b/09-september/resources/textures/bricks_normal.png
new file mode 100644
index 0000000..a2ee2b4
--- /dev/null
+++ b/09-september/resources/textures/bricks_normal.png
diff --git a/09-september/resources/textures/default_normal_map.png b/09-september/resources/textures/default_normal_map.png
new file mode 100644
index 0000000..9dfd3a4
--- /dev/null
+++ b/09-september/resources/textures/default_normal_map.png
diff --git a/09-september/resources/textures/fire.png b/09-september/resources/textures/fire.png
new file mode 100755
index 0000000..e2498d9
--- /dev/null
+++ b/09-september/resources/textures/fire.png
diff --git a/09-september/resources/textures/front.png b/09-september/resources/textures/front.png
new file mode 100644
index 0000000..fbff722
--- /dev/null
+++ b/09-september/resources/textures/front.png
diff --git a/09-september/resources/textures/heightmap.png b/09-september/resources/textures/heightmap.png
new file mode 100644
index 0000000..12741e5
--- /dev/null
+++ b/09-september/resources/textures/heightmap.png
diff --git a/09-september/resources/textures/left.png b/09-september/resources/textures/left.png
new file mode 100644
index 0000000..374322a
--- /dev/null
+++ b/09-september/resources/textures/left.png
diff --git a/09-september/resources/textures/normal_map.png b/09-september/resources/textures/normal_map.png
new file mode 100644
index 0000000..d96a41c
--- /dev/null
+++ b/09-september/resources/textures/normal_map.png
diff --git a/09-september/resources/textures/particleAtlas.png b/09-september/resources/textures/particleAtlas.png
new file mode 100755
index 0000000..c202947
--- /dev/null
+++ b/09-september/resources/textures/particleAtlas.png
diff --git a/09-september/resources/textures/particleStar.png b/09-september/resources/textures/particleStar.png
new file mode 100755
index 0000000..0ce7e6f
--- /dev/null
+++ b/09-september/resources/textures/particleStar.png
diff --git a/09-september/resources/textures/right.png b/09-september/resources/textures/right.png
new file mode 100644
index 0000000..89fbb5f
--- /dev/null
+++ b/09-september/resources/textures/right.png
diff --git a/09-september/resources/textures/smoke.png b/09-september/resources/textures/smoke.png
new file mode 100755
index 0000000..eef2e19
--- /dev/null
+++ b/09-september/resources/textures/smoke.png
diff --git a/09-september/resources/textures/soil1.png b/09-september/resources/textures/soil1.png
new file mode 100644
index 0000000..227e96c
--- /dev/null
+++ b/09-september/resources/textures/soil1.png
diff --git a/09-september/resources/textures/soil2.png b/09-september/resources/textures/soil2.png
new file mode 100644
index 0000000..5fc40e2
--- /dev/null
+++ b/09-september/resources/textures/soil2.png
diff --git a/09-september/resources/textures/soil3.png b/09-september/resources/textures/soil3.png
new file mode 100644
index 0000000..2c1c431
--- /dev/null
+++ b/09-september/resources/textures/soil3.png
diff --git a/09-september/resources/textures/soil4.png b/09-september/resources/textures/soil4.png
new file mode 100644
index 0000000..8d3a4d3
--- /dev/null
+++ b/09-september/resources/textures/soil4.png
diff --git a/09-september/resources/textures/stall.png b/09-september/resources/textures/stall.png
new file mode 100644
index 0000000..d4d6f6e
--- /dev/null
+++ b/09-september/resources/textures/stall.png
diff --git a/09-september/resources/textures/top.png b/09-september/resources/textures/top.png
new file mode 100644
index 0000000..f92e8f7
--- /dev/null
+++ b/09-september/resources/textures/top.png
diff --git a/09-september/tomcat/gui/widget.c b/09-september/tomcat/gui/widget.c
new file mode 100644
index 0000000..507173a
--- /dev/null
+++ b/09-september/tomcat/gui/widget.c
@@ -0,0 +1,12 @@
+#include "widget.h"
+#include <stdlib.h>
+
+widget_t *Widget_CreateImage(Texture *texture, int x, int y, int w, int h)
+{
+    return NULL;
+}
+
+void Widget_Destroy(widget_t *widget)
+{
+    free(widget);
+}
diff --git a/09-september/tomcat/gui/widget.h b/09-september/tomcat/gui/widget.h
new file mode 100644
index 0000000..1b1c62d
--- /dev/null
+++ b/09-september/tomcat/gui/widget.h
@@ -0,0 +1,13 @@
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include "GL/glew.h"
+#include "../renderer/renderer_types.h"
+
+typedef struct
+{
+    int x, y, w, h;
+    Texture *texture;
+} widget_t;
+
+#endif // WIDGET_H
diff --git a/09-september/tomcat/input.c b/09-september/tomcat/input.c
new file mode 100644
index 0000000..8384ceb
--- /dev/null
+++ b/09-september/tomcat/input.c
@@ -0,0 +1,21 @@
+#include "input.h"
+
+static bool key_buffer[MAX_KEY_BUFFER_SIZE] = { false };
+
+void Input_PressKey(unsigned int key)
+{
+    if(key > 256 || key < 0) return;
+    key_buffer[key] = true;
+}
+
+void Input_ReleaseKey(unsigned int key)
+{
+    if(key > 256 || key < 0) return;
+    key_buffer[key] = false;
+}
+
+bool Input_isKeyPressed(unsigned int key)
+{
+    if(key > 256 || key < 0) return false;
+    return key_buffer[key];
+}
diff --git a/09-september/tomcat/input.h b/09-september/tomcat/input.h
new file mode 100644
index 0000000..92876ca
--- /dev/null
+++ b/09-september/tomcat/input.h
@@ -0,0 +1,11 @@
+#ifndef INPUT_H
+#define INPUT_H
+
+#include <stdbool.h>
+#define MAX_KEY_BUFFER_SIZE 256
+
+void Input_PressKey(unsigned int key);
+void Input_ReleaseKey(unsigned int key);
+bool Input_isKeyPressed(unsigned int key);
+
+#endif // INPUT_H
diff --git a/09-september/tomcat/math/math_util.c b/09-september/tomcat/math/math_util.c
new file mode 100644
index 0000000..1285f3d
--- /dev/null
+++ b/09-september/tomcat/math/math_util.c
@@ -0,0 +1,10 @@
+#include "math_util.h"
+
+float baryCentric(Vec3 *p1, Vec3 *p2, Vec3 *p3, Vec2 *pos)
+{
+    float det = (p2->z - p3->z) * (p1->x - p3->x) + (p3->x - p2->x) * (p1->z - p3->z);
+	float l1 = ((p2->z - p3->z) * (pos->x - p3->x) + (p3->x - p2->x) * (pos->y - p3->z)) / det;
+	float l2 = ((p3->z - p1->z) * (pos->x - p3->x) + (p1->x - p3->x) * (pos->y - p3->z)) / det;
+	float l3 = 1.0f - l1 - l2;
+	return l1 * p1->y + l2 * p2->y + l3 * p3->y;
+}
diff --git a/09-september/tomcat/math/math_util.h b/09-september/tomcat/math/math_util.h
new file mode 100644
index 0000000..5582dc7
--- /dev/null
+++ b/09-september/tomcat/math/math_util.h
@@ -0,0 +1,8 @@
+#ifndef MATH_UTIL_H
+#define MATH_UTIL_H
+
+#include "vector.h"
+
+extern float baryCentric(Vec3 *p1, Vec3 *p2, Vec3 *p3, Vec2 *pos);
+
+#endif // MATH_UTIL_H
diff --git a/09-september/tomcat/math/matrix4x4.c b/09-september/tomcat/math/matrix4x4.c
new file mode 100644
index 0000000..d4bea71
--- /dev/null
+++ b/09-september/tomcat/math/matrix4x4.c
@@ -0,0 +1,326 @@
+#include "matrix4x4.h"
+#include "../util/util.h"
+#include <SDL2/SDL.h>
+
+void mat4_identity(Mat4 *a)
+{
+    int i;
+    for(i = 0; i < 4*4; i++)
+    {
+        a->data[i] = 0.0f;
+    }
+    a->data[0 + 0 * 4] = 1.0f;
+    a->data[1 + 1 * 4] = 1.0f;
+    a->data[2 + 2 * 4] = 1.0f;
+    a->data[3 + 3 * 4] = 1.0f;
+}
+
+/** TODO: Preprocess these operation (1 + 1 * 4) -> 5 **/
+Mat4 mat4_inverse(const Mat4 *a)
+{
+    Mat4 inv;
+    int i;
+
+    /** Remember that inverted matrix is (1/det) * cofactor(transposed) **/
+    inv.data[0 + 0 * 4] =  (a->data[1 + 1 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 1 * 4] * a->data[3 + 2 * 4] * a->data[1 + 3 * 4] +
+                            a->data[3 + 1 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 1 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[1 + 1 * 4] -
+                            a->data[3 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 1 * 4]);
+
+    inv.data[0 + 1 * 4] = -(a->data[0 + 1 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 1 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 1 * 4] * a->data[0 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 1 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 1 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 2 * 4] * a->data[2 + 1 * 4]);
+
+    inv.data[0 + 2 * 4] =  (a->data[0 + 1 * 4] * a->data[1 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[1 + 1 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 1 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[3 + 1 * 4] -
+                            a->data[1 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 1 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 2 * 4] * a->data[1 + 1 * 4]);
+
+    inv.data[0 + 3 * 4] = -(a->data[0 + 1 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] +
+                            a->data[1 + 1 * 4] * a->data[2 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[2 + 1 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 1 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[0 + 1 * 4] -
+                            a->data[2 + 3 * 4] * a->data[0 + 2 * 4] * a->data[1 + 1 * 4]);
+
+    inv.data[1 + 0 * 4] = -(a->data[1 + 0 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 2 * 4] * a->data[1 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[1 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[1 + 1 * 4] =  (a->data[0 + 0 * 4] * a->data[2 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 2 * 4] * a->data[2 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[2 + 2 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 2 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[1 + 2 * 4] = -(a->data[0 + 0 * 4] * a->data[1 + 2 * 4] * a->data[3 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[3 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[3 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[3 + 2 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 + 4] * a->data[0 + 2 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[1 + 3 * 4] =  (a->data[0 + 0 * 4] * a->data[1 + 2 * 4] * a->data[2 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[2 + 2 * 4] * a->data[0 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[0 + 2 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 2 * 4] * a->data[2 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 2 * 4] * a->data[0 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[0 + 2 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[2 + 0 * 4] =  (a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[1 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 3 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 1 * 4] * a->data[1 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[2 + 1 * 4] = -(a->data[0 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[2 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[2 + 2 * 4] =  (a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[3 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 3 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 3 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[2 + 3 * 4] = -(a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 3 * 4] +
+                            a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[0 + 3 * 4] +
+                            a->data[2 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 3 * 4] -
+                            a->data[0 + 3 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4] -
+                            a->data[1 + 3 * 4] * a->data[2 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[2 + 3 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[3 + 0 * 4] = -(a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 2 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[1 + 2 * 4] +
+                            a->data[3 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 2 * 4] -
+                            a->data[1 + 2 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 2 * 4] * a->data[3 + 1 * 4] * a->data[1 + 0 * 4] -
+                            a->data[3 + 2 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[3 + 1 * 4] =  (a->data[0 + 0 * 4] * a->data[2 + 1 * 4] * a->data[3 + 2 * 4] +
+                            a->data[2 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 2 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[2 + 2 * 4] -
+                            a->data[0 + 2 * 4] * a->data[2 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[2 + 2 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 2 * 4] * a->data[0 + 1 * 4] * a->data[2 + 0 * 4]);
+
+    inv.data[3 + 2 * 4] = -(a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[3 + 2 * 4] +
+                            a->data[1 + 0 * 4] * a->data[3 + 1 * 4] * a->data[0 + 2 * 4] +
+                            a->data[3 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 2 * 4] -
+                            a->data[0 + 2 * 4] * a->data[1 + 1 * 4] * a->data[3 + 0 * 4] -
+                            a->data[1 + 2 * 4] * a->data[3 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[3 + 2 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    inv.data[3 + 3 * 4] =  (a->data[0 + 0 * 4] * a->data[1 + 1 * 4] * a->data[2 + 2 * 4] +
+                            a->data[1 + 0 * 4] * a->data[2 + 1 * 4] * a->data[0 + 2 * 4] +
+                            a->data[2 + 0 * 4] * a->data[0 + 1 * 4] * a->data[1 + 2 * 4] -
+                            a->data[0 + 2 * 4] * a->data[1 + 1 * 4] * a->data[2 + 0 * 4] -
+                            a->data[1 + 2 * 4] * a->data[2 + 1 * 4] * a->data[0 + 0 * 4] -
+                            a->data[2 + 2 * 4] * a->data[0 + 1 * 4] * a->data[1 + 0 * 4]);
+
+    /** Remember that our matrix is already transposed and we also got the minors(inside each "inv" entry),
+        so we just use them. We use a->data[0 + 1 * 4] * inv.data[1 + 0 * 4] becouse inv.data is transposed **/
+    float det = a->data[0 + 0 * 4] * inv.data[0 + 0 * 4] + a->data[0 + 1 * 4] * inv.data[1 + 0 * 4] +
+                a->data[0 + 2 * 4] * inv.data[2 + 0 * 4] + a->data[0 + 3 * 4] * inv.data[3 + 0 * 4];
+
+    if(det == 0.0f)
+        return *a;
+
+    det = 1.0f / det;
+
+    for(i = 0; i < 16; i++)
+        inv.data[i] *= det;
+
+    return inv;
+}
+
+Mat4 mat4_mul(const Mat4 *a, const Mat4 *b)
+{
+    int i, j, k;
+    GLfloat sum = 0.0f;
+    Mat4 c;
+    mat4_identity(&c);
+    for(i = 0; i < 4; i++)
+        for(j = 0; j < 4; j++){
+            for(k = 0; k < 4; k++){
+                sum += a->data[i + k * 4] * b->data[k + j * 4];
+            }
+            c.data[i + j * 4] = sum;
+            sum = 0.0f;
+        }
+
+    return c;
+}
+
+Mat4 mat4_translate(const Vec3 *a)
+{
+    Mat4 b;
+    mat4_identity(&b);
+    b.data[0 + 3 * 4] = a->x;
+    b.data[1 + 3 * 4] = a->y;
+    b.data[2 + 3 * 4] = a->z;
+    return b;
+}
+
+Mat4 mat4_scale(GLfloat x, GLfloat y, GLfloat z)
+{
+    Mat4 b;
+    mat4_identity(&b);
+    b.data[0 + 0 * 4] = x;
+    b.data[1 + 1 * 4] = y;
+    b.data[2 + 2 * 4] = z;
+    return b;
+}
+
+Mat4 mat4_rotate(GLfloat degrees, const Vec3 *a)
+{
+    Mat4 b;
+    mat4_identity(&b);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees)), o = 1-c;
+    b.data[0 + 0 * 4] = a->x * a->x * o + c;
+    b.data[0 + 1 * 4] = a->x * a->y * o - a->z * s;
+    b.data[0 + 2 * 4] = a->x * a->z * o + a->y * s;
+
+    b.data[1 + 0 * 4] = a->x * a->y * o + a->z * s;
+    b.data[1 + 1 * 4] = a->y * a->y * o + c;
+    b.data[1 + 2 * 4] = a->y * a->z * o - a->x * s;
+
+    b.data[2 + 0 * 4] = a->x * a->z * o - a->y * s;
+    b.data[2 + 1 * 4] = a->y * a->z * o + a->x * s;
+    b.data[2 + 2 * 4] = a->z * a->z * o + c;
+    return b;
+}
+
+Mat4 mat4_rotate_x(GLfloat degrees)
+{
+    Mat4 a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[1 + 1 * 4] = c;
+    a.data[2 + 1 * 4] = s;
+    a.data[1 + 2 * 4] = -s;
+    a.data[2 + 2 * 4] = c;
+    return a;
+}
+
+Mat4 mat4_rotate_y(GLfloat degrees)
+{
+    Mat4 a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[0 + 0 * 4] = c;
+    a.data[2 + 0 * 4] = -s;
+    a.data[0 + 2 * 4] = s;
+    a.data[2 + 2 * 4] = c;
+    return a;
+}
+
+Mat4 mat4_rotate_z(GLfloat degrees)
+{
+    Mat4 a;
+    mat4_identity(&a);
+    GLfloat c = SDL_cosf(toRadians(degrees)), s = SDL_sinf(toRadians(degrees));
+    a.data[0 + 0 * 4] = c;
+    a.data[1 + 0 * 4] = s;
+    a.data[0 + 1 * 4] = -s;
+    a.data[1 + 1 * 4] = c;
+    return a;
+}
+
+Mat4 mat4_perspective(GLfloat fov, GLfloat aspect, GLfloat zNear, GLfloat zFar)
+{
+    Mat4 a;
+    GLubyte i, j;
+    for(i = 0; i < 4; i++)
+        for(j = 0; j < 4; j++)
+            a.data[i + j * 4] = 0.0f;
+    fov = toRadians(fov); // To radians
+
+    a.data[0 + 0 * 4] = ( (1.0f / SDL_tanf( fov/2.0f )) / aspect);
+    a.data[1 + 1 * 4] = (1.0f / SDL_tanf( fov/2.0f ));
+    a.data[2 + 2 * 4] = -( (zFar + zNear) / (zFar - zNear) );
+    a.data[2 + 3 * 4] = -( ( 2.0f * zFar * zNear) / (zFar - zNear) );
+    a.data[3 + 2 * 4] = -1.0f;
+
+    return a;
+}
+
+Mat4
+mat4_orthographic(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat near, GLfloat far)
+{
+    Mat4 a;
+    mat4_identity(&a);
+    a.data[0 + 0 * 4] = 2.0f / (right - left);
+    a.data[1 + 1 * 4] = 2.0f / (top - bottom);
+    a.data[2 + 2 * 4] = 2.0f / (near - far);
+
+    a.data[0 + 3 * 4] = (left + right) / (left - right);
+    a.data[1 + 3 * 4] = (bottom + top) / (bottom - top);
+    a.data[2 + 3 * 4] = (far + near) / (far - near);
+
+    return a;
+}
+
+Mat4 mat4_lookAt(Vec3 *eye, Vec3 *center, Vec3 *up)
+{
+    Vec3 temp = vec3_sub(center, eye);
+
+    Vec3 f = vec3_normalize(&temp);
+    Vec3 u = vec3_normalize(up);
+    temp = vec3_cross_mul(&f, &u);
+    Vec3 s = vec3_normalize(&temp);
+    u = vec3_cross_mul(&s, &f);
+
+    Mat4 a;
+    mat4_identity(&a);
+
+    a.data[0 + 0 * 4] = s.x;

+    a.data[0 + 1 * 4] = s.y;

+    a.data[0 + 2 * 4] = s.z;

+    a.data[1 + 0 * 4] = u.x;

+    a.data[1 + 1 * 4] = u.y;

+    a.data[1 + 2 * 4] = u.z;

+    a.data[2 + 0 * 4] =-f.x;

+    a.data[2 + 1 * 4] =-f.y;

+    a.data[2 + 2 * 4] =-f.z;

+    a.data[0 + 3 * 4] =-vec3_dot_mul(&s, eye);

+    a.data[1 + 3 * 4] =-vec3_dot_mul(&u, eye);

+    a.data[2 + 3 * 4] = vec3_dot_mul(&f, eye);
+

+    return a;
+}
+
+Vec3 mat4_mul_vec3(const Mat4 *a, const Vec3 *b)
+{
+    Vec3 c;
+    c.x = a->data[0 + 0 * 4] * b->x + a->data[0 + 1 * 4] * b->y + a->data[0 + 2 * 4] * b->z + a->data[0 + 3 * 4];
+    c.y = a->data[1 + 0 * 4] * b->x + a->data[1 + 1 * 4] * b->y + a->data[1 + 2 * 4] * b->z + a->data[1 + 3 * 4];
+    c.z = a->data[2 + 0 * 4] * b->x + a->data[2 + 1 * 4] * b->y + a->data[2 + 2 * 4] * b->z + a->data[2 + 3 * 4];
+    return c;
+}
+
+Vec4 mat4_mul_vec4(const Mat4 *a, const Vec4 *b)
+{
+    Vec4 c;
+    c.x = a->data[0 + 0 * 4] * b->x + a->data[0 + 1 * 4] * b->y + a->data[0 + 2 * 4] * b->z + a->data[0 + 3 * 4] * b->w;
+    c.y = a->data[1 + 0 * 4] * b->x + a->data[1 + 1 * 4] * b->y + a->data[1 + 2 * 4] * b->z + a->data[1 + 3 * 4] * b->w;
+    c.z = a->data[2 + 0 * 4] * b->x + a->data[2 + 1 * 4] * b->y + a->data[2 + 2 * 4] * b->z + a->data[2 + 3 * 4] * b->w;
+    c.w = a->data[3 + 0 * 4] * b->x + a->data[3 + 1 * 4] * b->y + a->data[3 + 2 * 4] * b->z + a->data[3 + 3 * 4] * b->w;
+    return c;
+}
diff --git a/09-september/tomcat/math/matrix4x4.h b/09-september/tomcat/math/matrix4x4.h
new file mode 100644
index 0000000..74918fe
--- /dev/null
+++ b/09-september/tomcat/math/matrix4x4.h
@@ -0,0 +1,39 @@
+#ifndef MATRIX4X4_H
+#define MATRIX4X4_H
+
+#include <GL/glew.h>
+#include "vector.h"
+
+/* accesing data: row + column * width */
+typedef struct
+{
+    GLfloat data[16];
+} Mat4;
+
+extern void mat4_identity(Mat4 *a);
+extern Mat4 mat4_inverse(const Mat4 *a);
+extern Mat4 mat4_mul(const Mat4 *a, const Mat4 *b);
+
+extern Mat4 mat4_translate(const Vec3 *a);
+extern Mat4 mat4_scale(GLfloat x, GLfloat y, GLfloat z);
+extern Mat4 mat4_rotate_x(GLfloat degrees);
+extern Mat4 mat4_rotate_y(GLfloat degrees);
+extern Mat4 mat4_rotate_z(GLfloat degrees);
+extern Mat4 mat4_rotate(GLfloat degrees, const Vec3 *a);
+
+extern Mat4
+mat4_perspective(GLfloat fov, GLfloat aspect, GLfloat zNear, GLfloat zFar);
+
+extern Mat4
+mat4_orthographic(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat near, GLfloat far);
+
+extern Mat4
+mat4_lookAt(Vec3 *eye, Vec3 *center, Vec3 *up);
+
+extern Vec3
+mat4_mul_vec3(const Mat4 *a, const Vec3 *b);
+
+extern Vec4
+mat4_mul_vec4(const Mat4 *a, const Vec4 *b);
+
+#endif // MATRIX4X4_H
diff --git a/09-september/tomcat/math/vector.c b/09-september/tomcat/math/vector.c
new file mode 100644
index 0000000..230de51
--- /dev/null
+++ b/09-september/tomcat/math/vector.c
@@ -0,0 +1,177 @@
+#include "vector.h"
+#include <SDL2/SDL.h>
+
+Vec4 vec4_add(const Vec4 *a, const Vec4 *b)
+{
+    Vec4 c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    c.z = a->z + b->z;
+    c.w = a->w + b->w;
+    return c;
+}
+
+Vec4 vec4_sub(const Vec4 *a, const Vec4 *b)
+{
+    Vec4 c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    c.z = a->z - b->z;
+    c.w = a->w - b->w;
+    return c;
+}
+
+Vec4 vec4_scalar_mul(const Vec4 *a, GLfloat scalar)
+{
+    Vec4 c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    c.z = a->z * scalar;
+    c.w = a->w * scalar;
+    return c;
+}
+
+GLfloat vec4_dot_mul(const Vec4 *a, const Vec4 *b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) + (a->z * b->z) + (a->w * b->w) );
+}
+
+GLfloat vec4_length(Vec4 *a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f) + SDL_pow(a->w, 2.0f) );
+}
+
+GLfloat vec4_length2(Vec4 *a)
+{
+    return ( SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f) + SDL_pow(a->w, 2.0f) );
+}
+
+Vec4 vec4_normalize(Vec4 *a)
+{
+    Vec4 b;
+    GLfloat length = vec4_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    b.z = a->z / length;
+    b.w = a->w / length;
+    return b;
+}
+
+Vec3 vec3_add(const Vec3 *a, const Vec3 *b)
+{
+    Vec3 c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    c.z = a->z + b->z;
+    return c;
+}
+
+Vec3 vec3_sub(const Vec3 *a, const Vec3 *b)
+{
+    Vec3 c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    c.z = a->z - b->z;
+    return c;
+}
+
+Vec3 vec3_scalar_mul(const Vec3 *a, GLfloat scalar)
+{
+    Vec3 c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    c.z = a->z * scalar;
+    return c;
+}
+
+GLfloat vec3_dot_mul(const Vec3 *a, const Vec3 *b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) + (a->z * b->z) );
+}
+
+
+Vec3 vec3_cross_mul(const Vec3 *a, const Vec3 *b)
+{
+    Vec3 c;
+    c.x = (a->y * b->z) - (a->z * b->y);
+    c.y = (a->z * b->x) - (a->x * b->z);
+    c.z = (a->x * b->y) - (a->y * b->x);
+    return c;
+}
+
+GLfloat vec3_length(Vec3 *a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f));
+}
+
+GLfloat vec3_length2(Vec3 *a)
+{
+    return ( SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) + SDL_pow(a->z, 2.0f) );
+}
+
+Vec3 vec3_normalize(Vec3 *a)
+{
+    Vec3 b;
+    GLfloat length = vec3_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    b.z = a->z / length;
+    return b;
+}
+
+Vec2 vec2_add(const Vec2 *a, const Vec2 *b)
+{
+    Vec2 c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    return c;
+}
+
+Vec2 vec2_sub(const Vec2 *a, const Vec2 *b)
+{
+    Vec2 c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    return c;
+}
+
+Vec2 vec2_scalar_mul(const Vec2 *a, GLfloat scalar)
+{
+    Vec2 c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    return c;
+}
+
+GLfloat vec2_dot_mul(const Vec2 *a, const Vec2 *b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) );
+}
+
+
+Vec2 vec2_cross_mul(const Vec2 *a, const Vec2 *b)
+{
+    Vec2 c;
+    c.x = (a->x * b->y) - (a->y * b->x);
+    c.y = (a->y * b->x) - (a->x * b->y);
+    return c;
+}
+
+GLfloat vec2_length(Vec2 *a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) );
+}
+
+GLfloat vec2_length2(Vec2 *a)
+{
+    return ( SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) );
+}
+
+Vec2 vec2_normalize(Vec2 *a)
+{
+    Vec2 b;
+    GLfloat length = vec2_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    return b;
+}
diff --git a/09-september/tomcat/math/vector.h b/09-september/tomcat/math/vector.h
new file mode 100644
index 0000000..173fc11
--- /dev/null
+++ b/09-september/tomcat/math/vector.h
@@ -0,0 +1,47 @@
+#ifndef VECTOR4F_H
+#define VECTOR4F_H
+
+#include <GL/glew.h>
+
+typedef struct _Vec4
+{
+    GLfloat x, y, z, w;
+} Vec4;
+
+extern Vec4 vec4_add(const Vec4 *a, const Vec4 *b);
+extern Vec4 vec4_sub(const Vec4 *a, const Vec4 *b);
+extern Vec4 vec4_scalar_mul(const Vec4 *a, GLfloat scalar);
+extern GLfloat vec4_dot_mul(const Vec4 *a, const Vec4 *b);
+extern GLfloat vec4_length(Vec4 *a);
+extern GLfloat vec4_length2(Vec4 *a);
+extern Vec4 vec4_normalize(Vec4 *a);
+
+typedef struct _Vec3
+{
+    GLfloat x, y, z;
+} Vec3;
+
+extern Vec3 vec3_add(const Vec3 *a, const Vec3 *b);
+extern Vec3 vec3_sub(const Vec3 *a, const Vec3 *b);
+extern Vec3 vec3_scalar_mul(const Vec3 *a, GLfloat scalar);
+extern GLfloat vec3_dot_mul(const Vec3 *a, const Vec3 *b);
+extern Vec3 vec3_cross_mul(const Vec3 *a, const Vec3 *b);
+extern GLfloat vec3_length(Vec3 *a);
+extern GLfloat vec3_length2(Vec3 *a);
+extern Vec3 vec3_normalize(Vec3 *a);
+
+typedef struct _Vec2
+{
+    GLfloat x, y;
+} Vec2;
+
+extern Vec2 vec2_add(const Vec2 *a, const Vec2 *b);
+extern Vec2 vec2_sub(const Vec2 *a, const Vec2 *b);
+extern Vec2 vec2_scalar_mul(const Vec2 *a, GLfloat scalar);
+extern GLfloat vec2_dot_mul(const Vec2 *a, const Vec2 *b);
+extern Vec2 vec2_cross_mul(const Vec2 *a, const Vec2 *b);
+extern GLfloat vec2_length(Vec2 *a);
+extern GLfloat vec2_length2(Vec2 *a);
+extern Vec2 vec2_normalize(Vec2 *a);
+
+#endif // VECTOR4F_H
diff --git a/09-september/tomcat/not_in_use/fbo.c b/09-september/tomcat/not_in_use/fbo.c
new file mode 100644
index 0000000..5880276
--- /dev/null
+++ b/09-september/tomcat/not_in_use/fbo.c
@@ -0,0 +1,108 @@
+#include "fbo.h"
+#include "renderer.h"
+#include "../util/util.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+Fbo *fbo_new(const char *name, GLint width, GLint height)
+{
+    Fbo *fbo;
+
+    if(strlen(name) >= MAX_PATH_LENGTH)
+        Util_FatalError("Fbo name is too long: %s\n", name);
+
+    if(render.num_fbos >= MAX_FBOS)
+        return NULL;
+
+    fbo = malloc(sizeof(Fbo));
+    memset(fbo, 0, sizeof(Fbo));
+
+    glGenFramebuffers(1, &fbo->frame_buffer);
+
+    return fbo;
+}
+
+void fbo_attach_buffer(Fbo *fbo, GLenum format, int index)
+{
+    GLenum attachment;
+    GLuint *buffer;
+
+    switch(format)
+	{
+		case GL_RGB:
+		case GL_RGBA:
+			fbo->color_format = format;
+			buffer = &fbo->color_buffer[index];
+			attachment = GL_COLOR_ATTACHMENT0 + index;
+			break;
+
+		case GL_DEPTH_COMPONENT:
+			fbo->depth_format = format;
+			buffer = &fbo->depth_buffer;
+			attachment = GL_DEPTH_ATTACHMENT;
+			break;
+
+		default:
+			Util_FatalError("Invalid fbo buffer format\n");
+	}
+
+	if(*buffer == 0)
+	{
+        glGenRenderbuffers(1, buffer);
+        glBindRenderbuffer(GL_RENDERBUFFER, *buffer);
+        glRenderbufferStorage(GL_RENDERBUFFER, format, fbo->width, fbo->height);
+
+        fbo_bind(fbo);
+        glFramebufferRenderbuffer(GL_FRAMEBUFFER, attachment, GL_RENDERBUFFER, *buffer);
+        fbo_bind(NULL);
+        glBindRenderbuffer(GL_RENDERBUFFER, 0);
+    }
+}
+
+void fbo_attach_texture(Fbo *fbo, Texture *t, GLenum attachment)
+{
+    int index;
+
+    fbo_bind(fbo);
+    if(attachment >= GL_COLOR_ATTACHMENT0 && attachment < GL_COLOR_ATTACHMENT0 + 8)
+    {
+        glFramebufferTexture(GL_FRAMEBUFFER, attachment, t->tex_id, 0);
+        glDrawBuffers(1, &attachment);
+
+        index = attachment - GL_COLOR_ATTACHMENT0;
+        fbo->color_textures[index] = t;
+    }
+
+    fbo_bind(NULL);
+}
+
+void fbo_bind(Fbo *fbo)
+{
+    if(fbo)
+    {
+        glBindFramebuffer(GL_FRAMEBUFFER, fbo->frame_buffer);
+        glViewport(0, 0, fbo->width, fbo->height);
+    }
+    else
+    {
+        glBindFramebuffer(GL_FRAMEBUFFER, 0);
+        glViewport(0, 0, render.window->Width, render.window->Height);
+    }
+}
+
+void fbo_purge(Fbo *fbo)
+{
+    int i;
+
+    for(i = 0; i < 8; i++)
+        if(fbo->color_buffer[i])
+        {
+            glDeleteRenderbuffers(1, &fbo->color_buffer[i]);
+        }
+    if(fbo->depth_buffer)
+        glDeleteRenderbuffers(1, &fbo->depth_buffer);
+
+    if(fbo->frame_buffer)
+        glDeleteFramebuffers(1, &fbo->frame_buffer);
+}
diff --git a/09-september/tomcat/not_in_use/fbo.h b/09-september/tomcat/not_in_use/fbo.h
new file mode 100644
index 0000000..244cb7f
--- /dev/null
+++ b/09-september/tomcat/not_in_use/fbo.h
@@ -0,0 +1,35 @@
+#ifndef FBO_H
+#define FBO_H
+
+#include "../shared.h"
+
+struct _Texture;
+
+typedef struct _Fbo
+{
+    char _name[MAX_PATH_LENGTH];
+
+    GLuint frame_buffer; /** Actual fbo object**/
+
+    /** color_texture when you want to render to a
+        texture and color_buffer when you want to render
+        to a RenderBuffer **/
+    struct _Texture *color_textures[8];
+    GLuint color_buffer[8];
+    GLenum color_format;
+
+    struct _Texture *depth_texture;
+    GLuint depth_buffer;
+    GLenum depth_format;
+
+    GLint width;
+    GLint height;
+} Fbo;
+
+extern Fbo *fbo_new(const char *name, GLint width, GLint height);
+extern void fbo_attach_buffer(Fbo *fbo, GLenum format, int index);
+extern void fbo_attach_texture(Fbo *fbo, struct _Texture *t, GLenum attachment);
+extern void fbo_bind(Fbo *fbo);
+extern void fbo_purge(Fbo *fbo);
+
+#endif // FBO_H
diff --git a/09-september/tomcat/particles/particles.c b/09-september/tomcat/particles/particles.c
new file mode 100644
index 0000000..5e99e06
--- /dev/null
+++ b/09-september/tomcat/particles/particles.c
@@ -0,0 +1,153 @@
+#include "particles.h"
+#include "../util/util_time.h"
+#include "../util/util.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+ParticleManager particles;
+
+static int compare_particles(const void *_a, const void *_b);
+
+void Particles_Init()
+{
+    memset( &particles, 0, sizeof(ParticleManager) );
+}
+
+ParticleSystem *Particles_AddSystem()
+{
+    if(particles.num_systems >= MAX_PARTICLES_SYSTEMS)
+        return NULL;
+
+    ParticleSystem *s = malloc( sizeof(ParticleSystem) );
+    particles.systems[particles.num_systems] = s;
+    memset( s, 0, sizeof(ParticleSystem) );
+
+    particles.num_systems += 1;
+
+    return s;
+}
+
+void Particles_RemoveSystem(ParticleSystem *system)
+{
+    int index = &system - particles.systems;
+
+    if(index > MAX_PARTICLES_SYSTEMS || index < 0)
+    {
+        fprintf(stderr, "Invalid particle system!\n");
+        return;
+    }
+    /* TODO: Finish this function */
+}
+
+void Particles_EmitParticle(ParticleSystem *system, Particle *p)
+{
+    if(system->num_particles >= MAX_PARTICLES_PER_SYSTEM)
+        return;
+
+    Particle *dest = &system->particles[system->num_particles];
+    memcpy(dest, p, sizeof(Particle));
+
+    system->num_particles += 1;
+}
+
+void Particles_Update(const Vec3 *camera_position)
+{
+    Particle *c = NULL;       /* Current particle */
+    ParticleSystem *s = NULL; /* Current particle system */
+    Texture *t = NULL;        /* Texture of the current system */
+    Vec3 d;             /* Vector for calculating the distance to the camera */
+    Vec3 velocity;
+
+    int i, j;
+    for(i = 0; i < particles.num_systems; i++)
+    {
+        s = particles.systems[i];
+        t = s->texture;
+
+        /* We ceil it so we dont truncate the decimal part and get always 0 */
+        int particles_to_emit = (int)ceil( s->emit_rate * Time_GetFrameTime() );
+
+        /* Emit the automatically emited particles */
+        for(j = 0; j < particles_to_emit; j++)
+        {
+            velocity.x = Util_RandomF(0.0f, 50.0f);
+            velocity.y = Util_RandomF(0.0f, 50.0f);
+            velocity.z = Util_RandomF(0.0f, 50.0f);
+            velocity = vec3_normalize(&velocity);
+
+            if(s->num_particles >= MAX_PARTICLES_PER_SYSTEM)
+                break; /* So we dont overflow */
+
+            c = &s->particles[s->num_particles ++];
+            memset(c, 0, sizeof(Particle));
+
+            c->life_length = s->life_length;
+            c->position = s->position;
+            c->scale = 10.0f;
+            c->weight = s->weight;
+            c->velocity = vec3_scalar_mul(&velocity, s->speed);
+        }
+
+        for(j = 0; j < s->num_particles; j++)
+        {
+            c = &s->particles[j];
+
+            /* Update each particle -.- */
+            c->velocity.y += c->weight * Time_GetFrameTime();
+            Vec3 velocity = vec3_scalar_mul(&c->velocity, Time_GetFrameTime());
+            c->position = vec3_add(&c->position, &velocity);
+
+            /* Update animations
+             * How far into its life the particle is */
+            float life_factor = c->elapsed_time / c->life_length;
+            /* How many different stages there are */
+            int stage_count = t->number_of_rows * t->number_of_rows;
+            float atlas_progression = life_factor * stage_count;
+            int index = floor(atlas_progression);
+
+            int column = index % t->number_of_rows;
+            int row = index / t->number_of_rows;
+            c->tex_offset.x = (float)column / t->number_of_rows;
+            c->tex_offset.y = (float)row / t->number_of_rows;
+            /* End of animation update */
+
+            c->elapsed_time += Time_GetFrameTime();
+
+            if(c->elapsed_time > c->life_length)
+            {
+                /* "Kill" the particle by overriding it with the last particle on the array */
+                memmove( c, &s->particles[s->num_particles], sizeof(Particle) );
+                s->num_particles -= 1;
+            }
+            else
+            {
+                d = vec3_sub(camera_position, &c->position);
+                c->distance_to_camera = vec3_length2(&d);
+            }
+        }
+        /*Sort all particles on system by distance to camera */
+        qsort(s->particles, s->num_particles, sizeof(Particle), compare_particles);
+    }
+}
+
+void Particles_Shutdown()
+{
+    int i;
+    for(i = 0; i < particles.num_systems; i++)
+    {
+        if(particles.systems[i])
+            free(particles.systems[i]);
+    }
+    memset(&particles, 0, sizeof(ParticleManager));
+}
+
+static int compare_particles(const void *_a, const void *_b)
+{
+    Particle *a = (Particle *)_a;
+    Particle *b = (Particle *)_b;
+
+    if(a->distance_to_camera < b->distance_to_camera) return -1;
+    if(a->distance_to_camera > b->distance_to_camera) return 1;
+    return 0;
+}
diff --git a/09-september/tomcat/particles/particles.h b/09-september/tomcat/particles/particles.h
new file mode 100644
index 0000000..8404ff4
--- /dev/null
+++ b/09-september/tomcat/particles/particles.h
@@ -0,0 +1,62 @@
+#ifndef PARTICLES_H
+#define PARTICLES_H
+
+#include "../renderer/renderer_types.h"
+#include "../math/vector.h"
+
+#define MAX_PARTICLES_PER_SYSTEM 10000
+#define MAX_PARTICLES_SYSTEMS 10
+
+typedef struct _Particle
+{
+    Vec3 position;
+    Vec3 velocity;
+
+    Vec2 tex_offset; /* Used for animating */
+
+    GLfloat weight; /* How does the gravity affect the particle (In theory it should be a vector)*/
+    GLfloat life_length;
+    GLfloat rotation;
+    GLfloat scale;
+    GLfloat distance_to_camera; /* Used for sorting the systems */
+
+    GLfloat elapsed_time;
+} Particle;
+
+typedef struct _ParticleSystem
+{
+    Vec3 position;
+
+    GLint emit_rate;
+    GLfloat speed;
+    GLfloat weight;
+    GLfloat life_length;
+
+    bool additive; /* Additive vs alpha blending */
+
+    Texture *texture;
+    Particle particles[MAX_PARTICLES_PER_SYSTEM];
+    int num_particles;
+
+} ParticleSystem;
+
+typedef struct
+{
+    ParticleSystem *systems[MAX_PARTICLES_SYSTEMS];
+    int num_systems;
+} ParticleManager;
+
+extern ParticleManager particles;
+
+extern void Particles_Init();
+
+extern ParticleSystem *Particles_AddSystem();
+extern void Particles_RemoveSystem(ParticleSystem *system);
+/* Used for manual emission */
+extern void Particles_EmitParticle(ParticleSystem *system, Particle *p);
+/* Removes a particle if it "dies" */
+extern void Particles_Update(const Vec3 *camera_position);
+/* We need to delete all dynamically allocated particles that still remains */
+extern void Particles_Shutdown();
+
+#endif // PARTICLES_H
diff --git a/09-september/tomcat/renderer/camera.c b/09-september/tomcat/renderer/camera.c
new file mode 100644
index 0000000..8a0c620
--- /dev/null
+++ b/09-september/tomcat/renderer/camera.c
@@ -0,0 +1,95 @@
+#include "camera.h"
+
+#include "../util/util_time.h"
+
+static const float movementSpeed = 40.0f;
+
+Camera *camera_new()
+{
+    Camera *camera;
+    camera = malloc( sizeof(Camera) );
+
+    camera->position = (Vec3){ 0.0f, 6.0f, 0.0f };
+    camera->viewDirection = (Vec3){ 0.5f, 0.0f, -1.0f };
+    camera->needsUpdate = true;
+    camera->up = (Vec3){ 0.0f, 1.0f, 0.0f };
+
+    return camera;
+}
+
+void camera_move_up(Camera* camera)
+{
+    Vec3 temp = vec3_scalar_mul(&camera->up, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void camera_move_down(Camera* camera)
+{
+    Vec3 temp = vec3_scalar_mul(&camera->up, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void camera_move_left(Camera* camera)
+{
+    Vec3 strafeDirection = vec3_cross_mul(&camera->viewDirection, &camera->up);
+    strafeDirection = vec3_scalar_mul(&strafeDirection, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &strafeDirection);
+}
+
+void camera_move_right(Camera* camera)
+{
+    Vec3 strafeDirection = vec3_cross_mul(&camera->viewDirection, &camera->up);
+    strafeDirection = vec3_scalar_mul(&strafeDirection, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &strafeDirection);
+}
+
+void camera_move_foward(Camera* camera)
+{
+    Vec3 temp = vec3_scalar_mul(&camera->viewDirection, movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void camera_move_backward(Camera* camera)
+{
+    Vec3 temp = vec3_scalar_mul(&camera->viewDirection, -movementSpeed * Time_GetFrameTime());
+    camera->position = vec3_add(&camera->position, &temp);
+}
+
+void camera_mouse_update(Camera *camera, const Vec2 *newMousePosition)
+{
+    Vec2 mouseDelta = vec2_sub(newMousePosition, &camera->mousePosition);
+
+    /* El if evita que el mouse se teletrasporte al cambiar de posicion muy rapido */
+    if(vec2_length(&mouseDelta) > 50.0f){
+        camera->mousePosition = *newMousePosition;
+        return;
+    }
+
+    Vec3 verticalRotation = vec3_cross_mul(&camera->viewDirection, &camera->up);
+
+    Mat4 temp = mat4_rotate(mouseDelta.x * -0.5f, &camera->up);
+
+    camera->viewDirection = mat4_mul_vec3(&temp, &camera->viewDirection);
+
+    temp = mat4_rotate(mouseDelta.y * -0.5f, &verticalRotation);
+    camera->viewDirection = mat4_mul_vec3(&temp, &camera->viewDirection);
+
+    camera->mousePosition = *newMousePosition;
+
+    camera->needsUpdate = true;
+}
+
+void camera_free(Camera *camera)
+{
+    free(camera);
+}
+
+Mat4 camera_get_model_to_view_matrix(Camera* camera)
+{
+    if(camera->needsUpdate)
+    {
+        Vec3 temp = vec3_add(&camera->position, &camera->viewDirection);
+        camera->viewMatrix = mat4_lookAt(&camera->position, &temp, &camera->up);
+    }
+    return camera->viewMatrix;
+}
diff --git a/09-september/tomcat/renderer/camera.h b/09-september/tomcat/renderer/camera.h
new file mode 100644
index 0000000..0c63178
--- /dev/null
+++ b/09-september/tomcat/renderer/camera.h
@@ -0,0 +1,32 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include "../math/matrix4x4.h"
+#include "../math/vector.h"
+#include <stdbool.h>
+
+typedef struct
+{
+    Vec3 position;
+    Vec3 viewDirection;
+    Vec3 up;
+    Mat4 projectionMatrix;
+    Mat4 viewMatrix;
+    Vec2 mousePosition;
+    bool needsUpdate;
+} Camera;
+
+extern Camera *camera_new();
+extern void camera_move_up(Camera *camera);
+extern void camera_move_down(Camera *camera);
+extern void camera_move_left(Camera *camera);
+extern void camera_move_right(Camera *camera);
+extern void camera_move_foward(Camera *camera);
+extern void camera_move_backward(Camera *camera);
+extern void camera_mouse_update(Camera *camera, const Vec2 *newMousePosition);
+extern void camera_free(Camera *camera);
+
+/* Consigue la viewMatrix */
+extern Mat4 camera_get_model_to_view_matrix(Camera *camera);
+
+#endif // CAMERA_H
diff --git a/09-september/tomcat/renderer/entity.c b/09-september/tomcat/renderer/entity.c
new file mode 100644
index 0000000..d5e7429
--- /dev/null
+++ b/09-september/tomcat/renderer/entity.c
@@ -0,0 +1,33 @@
+#include "renderer.h"
+
+Mat4 Entity_GetModelTransform(Entity* entity)
+{
+    Mat4 temp;
+    Mat4 rotation = mat4_rotate_x(entity->rotX);
+    temp = mat4_rotate_y(entity->rotY);
+    rotation = mat4_mul(&rotation, &temp);
+    temp = mat4_rotate_z(entity->rotZ);
+    rotation = mat4_mul(&rotation, &temp);
+
+    temp = mat4_translate(&entity->position);
+
+    Mat4 modelTransform = mat4_mul(&temp, &rotation);
+    temp = mat4_scale(entity->scale[0], entity->scale[1], entity->scale[2]);
+    modelTransform = mat4_mul(&modelTransform, &temp);
+
+    return modelTransform;
+}
+
+Vec2 Entity_GetTexOffset(Entity *entity)
+{
+    /* Offset inside a texture atlas should default to (0, 0)*/
+    Vec2 tex_offset;
+    Texture *t = entity->texture;
+
+    int column = entity->index % t->number_of_rows;
+    int row = entity->index / t->number_of_rows;
+    tex_offset.x = (float)column / t->number_of_rows;
+    tex_offset.y = (float)row / t->number_of_rows;
+
+    return tex_offset;
+}
diff --git a/09-september/tomcat/renderer/mesh.c b/09-september/tomcat/renderer/mesh.c
new file mode 100644
index 0000000..7ef27dc
--- /dev/null
+++ b/09-september/tomcat/renderer/mesh.c
@@ -0,0 +1,146 @@
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "mesh.h"
+#include "renderer.h"
+
+#define NUM_ARRAY_ELEMENTS(a) sizeof(a) / sizeof(*a)
+
+Mesh *mesh_new(vertex_t* vertices, GLsizeiptr vertexBuffersize,
+               GLushort* indices, GLsizeiptr indexBuffersize)
+{
+    Mesh *mesh;
+    mesh = malloc( sizeof(Mesh) );
+    memset(mesh, 0, sizeof(Mesh) );
+
+    render.meshes[render.num_meshes] = mesh;
+    render.num_meshes += 1;
+
+    mesh->num_indices = ( indexBuffersize / sizeof(GLushort) );
+
+    glGenVertexArrays(1, &mesh->vao);
+    glGenBuffers(1, &mesh->vbo);
+    glGenBuffers(1, &mesh->ebo);
+
+    glBindVertexArray(mesh->vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo);
+    glBufferData(GL_ARRAY_BUFFER, vertexBuffersize, vertices, GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexBuffersize, indices, GL_STATIC_DRAW);
+
+    glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
+    glEnableVertexAttribArray(2);
+    glEnableVertexAttribArray(3);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, position) );
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, texCoord) );
+    glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, normal) );
+    glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (const void*)offsetof(vertex_t, tangent) );
+
+    glBindVertexArray(0);
+    return mesh;
+}
+
+Mesh *mesh_make_skybox(float size)
+{
+    Mesh *mesh;
+    mesh = malloc( sizeof(Mesh) );
+    memset(mesh, 0, sizeof(Mesh) );
+
+    render.meshes[render.num_meshes] = mesh;
+    render.num_meshes += 1;
+
+    Vec3 positions[] =
+    {
+        {-size,  size, -size}, {-size, -size, -size}, {+size, -size, -size},
+        {+size, -size, -size}, {+size, +size, -size}, {-size, +size, -size},
+
+	    {-size, -size, +size}, {-size, -size, -size}, {-size, +size, -size},
+	    {-size, +size, -size}, {-size, +size, +size}, {-size, -size, +size},
+
+        {+size, -size, -size}, {+size, -size, +size}, {+size, +size, +size},
+	    {+size, +size, +size}, {+size, +size, -size}, {+size, -size, -size},
+
+	    {-size, -size, +size}, {-size, +size, +size}, {+size, +size, +size},
+	    {+size, +size, +size}, {+size, -size, +size}, {-size, -size, +size},
+
+	    {-size, +size, -size}, {+size, +size, -size}, {+size, +size, +size},
+	    {+size, +size, +size}, {-size, +size, +size}, {-size, +size, -size},
+
+	    {-size, -size, -size}, {-size, -size, +size}, {+size, -size, -size},
+	    {+size, -size, -size}, {-size, -size, +size}, {+size, -size, +size}
+	};
+
+    mesh->num_indices = 0;
+    mesh->num_vertices = NUM_ARRAY_ELEMENTS(positions);
+
+    glGenVertexArrays(1, &mesh->vao);
+    glGenBuffers(1, &mesh->vbo);
+    mesh->ebo = 0;
+
+    glBindVertexArray(mesh->vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(positions), positions, GL_STATIC_DRAW);
+
+    glEnableVertexAttribArray(0);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0 );
+
+    glBindVertexArray(0);
+    return mesh;
+}
+
+Mesh *mesh_make_quad()
+{
+    Mesh *mesh;
+    mesh = malloc( sizeof(Mesh) );
+    memset(mesh, 0, sizeof(Mesh) );
+
+    render.meshes[render.num_meshes] = mesh;
+    render.num_meshes += 1;
+
+    Vec3 positions[] =
+    {
+        { -0.5f, +0.5f, +0.0f}, { -0.5f, -0.5f, +0.0f},
+        { +0.5f, +0.5f, +0.0f}, { +0.5f, -0.5f, +0.0f}
+    };
+
+    mesh->num_vertices = NUM_ARRAY_ELEMENTS(positions);
+    mesh->num_indices = 0;
+
+    glGenVertexArrays(1, &mesh->vao);
+    glGenBuffers(1, &mesh->vbo);
+    mesh->ebo = 0;
+
+    glBindVertexArray(mesh->vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(positions), positions, GL_STATIC_DRAW);
+
+    glEnableVertexAttribArray(0);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0 );
+
+    glBindVertexArray(0);
+    return mesh;
+}
+
+void mesh_purge(Mesh *mesh)
+{
+    if(mesh)
+    {
+        if(mesh->vbo)
+            glDeleteBuffers(1, &mesh->vbo);
+        if(mesh->ebo)
+            glDeleteBuffers(1, &mesh->ebo);
+        if(mesh->vao)
+            glDeleteVertexArrays(1, &mesh->vao);
+
+        memset(mesh, 0, sizeof(Mesh));
+    }
+}
diff --git a/09-september/tomcat/renderer/mesh.h b/09-september/tomcat/renderer/mesh.h
new file mode 100644
index 0000000..711a82e
--- /dev/null
+++ b/09-september/tomcat/renderer/mesh.h
@@ -0,0 +1,22 @@
+#ifndef MESH_H
+#define MESH_H
+
+#include "vertex.h"
+
+typedef struct _Mesh
+{
+    GLuint num_indices;
+    GLuint num_vertices;
+    GLuint vbo, ebo, vao;
+} Mesh;
+
+/** Mesh Factory **/
+extern Mesh *mesh_new(vertex_t* vertices, GLsizeiptr vertexBuffersize,
+                      GLushort* indices, GLsizeiptr indexBuffersize);
+
+extern Mesh *mesh_make_skybox(float size);
+extern Mesh *mesh_make_quad();
+
+extern void mesh_purge(Mesh *mesh);
+
+#endif // MESH_H
diff --git a/09-september/tomcat/renderer/model.c b/09-september/tomcat/renderer/model.c
new file mode 100644
index 0000000..3c65ad3
--- /dev/null
+++ b/09-september/tomcat/renderer/model.c
@@ -0,0 +1,314 @@
+#include "model.h"
+#include "renderer.h"
+#include "../util/array.h"
+#include "../util/util.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define MAX_HASH_MODELS   1024
+static Model *model_hash_table[MAX_HASH_MODELS];
+
+static const int BUFFER_SIZE = 128;
+
+static Model *_model_alloc(const char *name)
+{
+    if(strlen(name) > MAX_PATH_LENGTH)
+        Util_FatalError("File following model name is too long: %s", name);
+
+    if(render.num_models >= MAX_MODELS)
+        return NULL;
+
+    Model *model;
+
+    unsigned int hash_ = Util_Hash( name );
+    hash_ %= MAX_HASH_MODELS;
+
+    model = malloc( sizeof(Model) );
+    memset(model, 0, sizeof(Model) );
+
+    render.models[render.num_models] = model;
+    render.num_models += 1;
+
+    strcpy(model->_name, name);
+    model->_hash_next = model_hash_table[hash_];
+    model_hash_table[hash_] = model;
+
+    model->_hash = hash_;
+
+    return model;
+}
+
+Model *model_get(const char *name)
+{
+    Model *model;
+
+    unsigned int hash_ = Util_Hash( name );
+    hash_ %= MAX_HASH_MODELS;
+
+    if(model_hash_table[hash_] != NULL)
+    {
+        for(model = model_hash_table[hash_]; model; model = model->_hash_next)
+        {
+            if( model->_hash == hash_ )
+                return model;
+        }
+    }
+
+    return NULL;
+}
+
+typedef struct
+{
+    vertex_t *data;
+    GLushort *indices;
+
+    Array *positions;
+    Array *textures;
+    Array *normals;
+    Array *tangents;
+
+    unsigned int vertex_count, index_count;
+    unsigned int index_pointer;
+
+    GLubyte hasTextCoords, hasNormals;
+} OBJ_Mesh;
+
+static vertex_t *search_index(vertex_t *pkey, vertex_t *pelem, unsigned int vertex_count)
+{
+    int i;
+    for(i = 0; i < vertex_count; i++)
+    {
+        if(pelem[i].position.x == pkey->position.x &&
+           pelem[i].position.y == pkey->position.y &&
+           pelem[i].position.z == pkey->position.z &&
+           pelem[i].texCoord.x == pkey->texCoord.x &&
+           pelem[i].texCoord.y == pkey->texCoord.y &&
+           pelem[i].normal.x == pkey->normal.x &&
+           pelem[i].normal.y == pkey->normal.y &&
+           pelem[i].normal.z == pkey->normal.z)
+        {
+            return &pelem[i];
+        }
+    }
+    return NULL;
+}
+
+static void calculate_tangents(OBJ_Mesh *mesh)
+{
+    int i;
+    for(i = 0; i < mesh->index_count; i += 3)
+    {
+        int i0 = i;
+        int i1 = i + 1;
+        int i2 = i + 2;
+
+        Vec3 *v0 = ( (Vec3 *)mesh->positions->data) + i0;
+        Vec3 *v1 = ( (Vec3 *)mesh->positions->data) + i1;
+        Vec3 *v2 = ( (Vec3 *)mesh->positions->data) + i2;
+
+        Vec2 *uv0 = ( (Vec2 *)mesh->textures->data) + i0;
+        Vec2 *uv1 = ( (Vec2 *)mesh->textures->data) + i1;
+        Vec2 *uv2 = ( (Vec2 *)mesh->textures->data) + i2;
+
+        Vec3 deltaPos1 = vec3_sub(v1, v0);
+        Vec3 deltaPos2 = vec3_sub(v2, v0);
+
+        Vec2 deltaUV1 = vec2_sub(uv1, uv0);
+        Vec2 deltaUV2 = vec2_sub(uv2, uv0);
+
+        GLfloat r = 1.0f / (deltaUV1.x * deltaUV2.y - deltaUV1.y * deltaUV2.x);
+
+        deltaPos1 = vec3_scalar_mul(&deltaPos1, deltaUV2.y);
+        deltaPos2 = vec3_scalar_mul(&deltaPos2, deltaUV1.y);
+
+        Vec3 tangent = vec3_sub(&deltaPos1, &deltaPos2);
+        tangent = vec3_scalar_mul(&tangent, r);
+
+         ( (Vec3 *)mesh->tangents->data)[i2] = tangent;
+         ( (Vec3 *)mesh->tangents->data)[i1] = tangent;
+         ( (Vec3 *)mesh->tangents->data)[i0] = tangent;
+    }
+    /*
+    We normalize the tangents at the end of the parse_obj_index loop
+    for(i = 0; i < mesh.index_count; i++)
+    {
+        mesh.tangents[i] = vec3_normalize(&mesh.tangents[i]);
+    }
+    */
+}
+
+static void parse_obj_index(OBJ_Mesh *mesh, vertex_t *current_vertex)
+{
+    vertex_t *indexOnArray = search_index(current_vertex, mesh->data, mesh->vertex_count);
+
+    /* We check if the vertex was already loaded, so the index points to the created vertex instead of repeating data*/
+    if(indexOnArray == NULL)
+    {
+        mesh->data = (vertex_t*) realloc( mesh->data, sizeof(vertex_t) * (++mesh->vertex_count) );
+
+        /* We make the index point to the last vertex added */
+        mesh->indices[mesh->index_pointer] = mesh->vertex_count - 1;
+
+        mesh->data[mesh->vertex_count - 1] = *current_vertex;
+    }
+    else
+    {
+        GLushort index = (GLushort)(indexOnArray - mesh->data);
+        mesh->data[index].tangent = vec3_add( &mesh->data[index].tangent,
+                                              &current_vertex->tangent );
+
+        /* We make the index point to the previus vertex added instead of creating a new one */
+        mesh->indices[mesh->index_pointer] = index;
+    }
+
+    mesh->index_pointer += 1;
+}
+
+Model *model_obj_new(const char *path)
+{
+    Model *model;
+    model = model_get(path);
+
+    if(model)
+        return model;
+
+    OBJ_Mesh obj_mesh;
+    memset( &obj_mesh, 0, sizeof(OBJ_Mesh) );
+
+    obj_mesh.positions = array_create( sizeof(Vec3) );
+    obj_mesh.normals   = array_create( sizeof(Vec3) );
+    obj_mesh.textures  = array_create( sizeof(Vec2) );
+
+    Array *positions = array_create( sizeof(Vec3) );
+    Array *normals   = array_create( sizeof(Vec3) );
+    Array *textures  = array_create( sizeof(Vec2) );
+
+    vertex_t current_vertex;
+
+    Vec3 current_position;
+    Vec3 current_normal;
+    Vec2 current_texture;
+
+    int count = 0, i;
+    int texture[3], normal[3], verts[3];
+
+    FILE *file = fopen(path, "r");
+    if(file == NULL)
+        Util_FatalError("%s file could not be loaded!", path);
+
+    char buffer[BUFFER_SIZE];
+    while( !feof(file) )
+    {
+        fgets(buffer, BUFFER_SIZE, file);
+        switch(buffer[0])
+        {
+        case 'v':
+            if(buffer[1] == 't')
+            {
+                count = sscanf(buffer, "vt %f %f\n", &current_texture.x, &current_texture.y);
+
+                array_append(textures, &current_texture);
+
+                if(count != 2)
+                    Util_FatalError("Bad texture coordinates on .obj file");
+            }
+            else if(buffer[1] == 'n')
+            {
+                count = sscanf(buffer, "vn %f %f %f\n", &current_normal.x,
+                                                        &current_normal.y,
+                                                        &current_normal.z);
+                array_append(normals, &current_normal);
+
+                if(count != 3)
+                    Util_FatalError("Bad normals data on .obj file");
+            }
+            else
+            {
+                count = sscanf(buffer, "v %f %f %f\n", &current_position.x,
+                                                       &current_position.y,
+                                                       &current_position.z);
+
+                array_append(positions, &current_position);
+
+                if(count != 3)
+                    Util_FatalError("Bad vertices data on .obj file");
+            }
+            break;
+        case 'f':
+            obj_mesh.index_count += 3;
+
+            count = sscanf(buffer, "f %d/%d/%d %d/%d/%d %d/%d/%d\n",
+                           &verts[0], &texture[0], &normal[0],
+                           &verts[1], &texture[1], &normal[1],
+                           &verts[2], &texture[2], &normal[2]);
+
+            if(count != 9)
+                Util_FatalError("Bad face data on .obj file");
+
+            array_append(obj_mesh.positions, &( (Vec3 *)positions->data )[ verts[0] -1 ] );
+            array_append(obj_mesh.positions, &( (Vec3 *)positions->data )[ verts[1] -1 ] );
+            array_append(obj_mesh.positions, &( (Vec3 *)positions->data )[ verts[2] -1 ] );
+
+            array_append(obj_mesh.normals, &( (Vec3 *)normals->data )[ normal[0] - 1 ] );
+            array_append(obj_mesh.normals, &( (Vec3 *)normals->data )[ normal[1] - 1 ] );
+            array_append(obj_mesh.normals, &( (Vec3 *)normals->data )[ normal[2] - 1 ] );
+
+            array_append(obj_mesh.textures, &( (Vec2 *)textures->data )[ texture[0] - 1 ] );
+            array_append(obj_mesh.textures, &( (Vec2 *)textures->data )[ texture[1] - 1 ] );
+            array_append(obj_mesh.textures, &( (Vec2 *)textures->data )[ texture[2] - 1 ] );
+
+            break;
+        default:
+            break;
+        }
+    }
+
+    obj_mesh.indices = malloc( obj_mesh.index_count * sizeof(GLushort) );
+    obj_mesh.tangents  = array_create_by_size( sizeof(Vec3), obj_mesh.index_count );
+    calculate_tangents(&obj_mesh);
+
+    for(i = 0; i < obj_mesh.index_count; i++)
+    {
+        current_vertex.position = ( (Vec3 *)obj_mesh.positions->data )[i];
+        current_vertex.texCoord = ( (Vec2 *)obj_mesh.textures->data )[i];
+        current_vertex.normal   = ( (Vec3 *)obj_mesh.normals->data )[i];
+        current_vertex.tangent  = ( (Vec3 *)obj_mesh.tangents->data )[i];
+
+        parse_obj_index(&obj_mesh, &current_vertex);
+    }
+
+    for(i = 0; i < obj_mesh.vertex_count; i++)
+    {
+        obj_mesh.data[i].tangent = vec3_normalize(&obj_mesh.data[i].tangent);
+    }
+
+    array_free(obj_mesh.positions);
+    array_free(obj_mesh.normals);
+    array_free(obj_mesh.textures);
+    array_free(obj_mesh.tangents);
+
+    array_free(positions);
+    array_free(textures);
+    array_free(normals);
+
+    fclose(file);
+
+    GLsizeiptr vertexBuffersize = obj_mesh.vertex_count * sizeof(vertex_t);
+    GLsizeiptr indexBuffersize = obj_mesh.index_count * sizeof(GLushort);
+
+    model = _model_alloc(path);
+
+    model->mesh = mesh_new(obj_mesh.data, vertexBuffersize, obj_mesh.indices, indexBuffersize);
+
+    free(obj_mesh.data);
+    free(obj_mesh.indices);
+
+    return model;
+}
+
+void model_purge(Model *model)
+{
+    mesh_purge(model->mesh);
+}
diff --git a/09-september/tomcat/renderer/model.h b/09-september/tomcat/renderer/model.h
new file mode 100644
index 0000000..6b514dd
--- /dev/null
+++ b/09-september/tomcat/renderer/model.h
@@ -0,0 +1,21 @@
+#ifndef MODEL_H
+#define MODEL_H
+
+#include "../shared.h"
+#include "mesh.h"
+
+typedef struct _Model
+{
+    Mesh *mesh;
+    /* Material? */
+
+    char _name[MAX_PATH_LENGTH];
+    struct _Model *_hash_next;
+    unsigned int _hash;
+} Model;
+
+extern Model *model_obj_new(const char *path);
+extern Model *model_get(const char *name);
+extern void model_purge(Model *model);
+
+#endif // MODEL_H
diff --git a/09-september/tomcat/renderer/renderer.c b/09-september/tomcat/renderer/renderer.c
new file mode 100644
index 0000000..307c543
--- /dev/null
+++ b/09-september/tomcat/renderer/renderer.c
@@ -0,0 +1,430 @@
+#include "renderer.h"
+#include "../util/util_time.h"
+#include "../util/util.h"
+
+#include <string.h>
+
+#define MAX_LIGHTS 4
+
+Renderer render;
+
+void Render_Init(Window *window)
+{
+    memset( &render, 0, sizeof(Renderer) );
+
+    if(glewInit() != GLEW_OK)
+        Util_FatalError("Glew could no be started!");
+
+    strcpy( render.info.version,         (const char *) glGetString(GL_VERSION) );
+    strcpy( render.info.vendor,          (const char *) glGetString(GL_VENDOR) );
+    strcpy( render.info.shading_version, (const char *) glGetString(GL_SHADING_LANGUAGE_VERSION) );
+
+    fprintf(stderr, "%s\n", render.info.version);
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_CULL_FACE);
+    glCullFace(GL_BACK);
+    glClearColor(0.0f, 0.0f, 0.39f, 1.0f);
+
+    //glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+
+    render.default_quad = mesh_make_quad();
+
+    render.default_shader = shader_new("pass_shader", "resources/shaders/passShader.vert",
+                                       "resources/shaders/passShader.frag");
+    render.default_shader->totalTransform = shader_get_uniform_location(render.default_shader, "M_MVP");
+    render.default_shader->Texture = shader_get_uniform_location(render.default_shader, "Texture");
+
+
+    glBindVertexArray(render.default_quad->vao);
+    glCreateBuffers(1, &render.instance_vbo);
+
+    glBindBuffer(GL_ARRAY_BUFFER, render.instance_vbo);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * 18 * 10000, NULL, GL_STREAM_DRAW);
+
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 18 * sizeof(GLfloat), (const void *)(sizeof(float) * 0));
+    glVertexAttribPointer(2, 4, GL_FLOAT, GL_FALSE, 18 * sizeof(GLfloat), (const void *)(sizeof(float) * 2) );
+    glVertexAttribPointer(3, 4, GL_FLOAT, GL_FALSE, 18 * sizeof(GLfloat), (const void *)(sizeof(float) * 6) );
+    glVertexAttribPointer(4, 4, GL_FLOAT, GL_FALSE, 18 * sizeof(GLfloat), (const void *)(sizeof(float) * 10) );
+    glVertexAttribPointer(5, 4, GL_FLOAT, GL_FALSE, 18 * sizeof(GLfloat), (const void *)(sizeof(float) * 14) );
+
+    glEnableVertexAttribArray(1);
+    glEnableVertexAttribArray(2);
+    glEnableVertexAttribArray(3);
+    glEnableVertexAttribArray(4);
+    glEnableVertexAttribArray(5);
+
+    glVertexAttribDivisor(1, 1);
+    glVertexAttribDivisor(2, 1);
+    glVertexAttribDivisor(3, 1);
+    glVertexAttribDivisor(4, 1);
+    glVertexAttribDivisor(5, 1);
+
+    glBindVertexArray(0);
+
+    render.window = window;
+    render.shadow_width = 1024;
+    render.shadow_height = 1024;
+
+    /** TEMP **/
+
+    Vec3 center = {0.0f, 0.0f, 0.0f};
+    Vec3 up = {0.0f, 1.0f, 0.0f};
+    render.inv_light_dir = (Vec3){11.54f, 66.74f, 9.93f};
+    Mat4 shadow_ortho_mat = mat4_orthographic(-100.0f, 100.0f, -100.0f, 100.0f, -100.0f, 200.0f);
+    Mat4 shadow_view_mat = mat4_lookAt(&render.inv_light_dir, &center, &up);
+    Mat4 shadow_model;
+    mat4_identity(&shadow_model);
+
+    render.shadow_mvp = mat4_mul(&shadow_ortho_mat, &shadow_view_mat);
+    render.shadow_mvp = mat4_mul(&render.shadow_mvp, &shadow_model);
+
+    render.shadow_shader = shader_new("s_shader", "resources/shaders/shadow_shader.vert",
+                                       "resources/shaders/shadow_shader.frag");
+    render.shadow_shader->totalTransform = shader_get_uniform_location(render.shadow_shader, "M_MVP");
+
+    /** TEMP **/
+
+    glGenFramebuffers(1, &render.shadow_fbo);
+    glBindFramebuffer(GL_FRAMEBUFFER, render.shadow_fbo);
+
+
+    glGenTextures(1, &render.shadow_map);
+    glBindTexture(GL_TEXTURE_2D, render.shadow_map);
+
+
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, render.shadow_width,
+                 render.shadow_height, 0, GL_DEPTH_COMPONENT, GL_FLOAT, 0);
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    glGenTextures(1, &render.shadow_color);
+    glBindTexture(GL_TEXTURE_2D, render.shadow_color);
+
+
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, render.shadow_width,
+                 render.shadow_height, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+    glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, render.shadow_map, 0);
+    glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, render.shadow_color, 0);
+
+    //glDrawBuffer(GL_NONE);
+    GLenum draw_buffer = GL_COLOR_ATTACHMENT0;
+    glDrawBuffers(1, &draw_buffer);
+
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
+        Util_FatalError("Could not create a frame buffer object\n");
+
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    glViewport(0, 0, render.window->Width, render.window->Height);
+
+    Util_CheckGLError();
+}
+
+void Render_BeginFrame()
+{
+    glClearColor(0.0f, 0.0f, 0.39f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+
+    glBindFramebuffer(GL_FRAMEBUFFER, render.shadow_fbo);
+    glViewport(0, 0, render.shadow_width, render.shadow_height);
+    glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+}
+
+void Render_LoadLights(Shader *s, const Light *lights, int n)
+{
+    Vec3 light_positions[MAX_LIGHTS];
+    Vec4 light_colors[MAX_LIGHTS];
+    Vec3 attenuation[MAX_LIGHTS];
+    int i;
+
+    /* Default light in case we are not given enough lights (n < 4) */
+    static const Light defaultLight =
+    {
+        { 0.0f, 0.0f, 0.0f },
+        { 0.0f, 0.0f, 0.0f, 0.0f },
+        { 1.0f, 0.0f, 0.0f }
+    };
+
+    for(i = 0; i < MAX_LIGHTS; i++)
+    {
+        if(i < n)
+        {
+            light_positions[i] = lights[i].position;
+            light_colors[i] = lights[i].color;
+            attenuation[i] = lights[i].attenuation;
+        }
+        else
+        {
+            light_positions[i] = defaultLight.position;
+            light_colors[i] = defaultLight.color;
+            attenuation[i] = defaultLight.attenuation;
+        }
+
+    }
+
+    glUniform3fv(s->lightPosition, MAX_LIGHTS, (float *)light_positions);
+    glUniform4fv(s->lightColor, MAX_LIGHTS, (float *)light_colors);
+    glUniform3fv(s->lightAttenuation, MAX_LIGHTS, (float *)attenuation);
+}
+
+/******************************************************************************
+*                                                                             *
+* Function Name: Render_DrawEntity                                            *
+*                                                                             *
+* Specific shader layout                                                      *
+* -> extra0 texture atlas number of rows                                      *
+* -> extra1 texture atlas xy offset                                           *
+*                                                                             *
+*******************************************************************************/
+
+void Render_DrawEntity(Shader *s, Mat4 *projectedViewMatrix, Entity *entity)
+{
+    Mesh *mesh = entity->model->mesh;
+    /*We need the model to world matrix in our shader in order to rotate the normals*/
+    Mat4 modelTransform = Entity_GetModelTransform(entity);
+    Mat4 totalMatrix;
+
+    /** TEMP **/
+
+    /** TEMP**/
+
+    glUniformMatrix4fv(s->modelToWorld, 1, GL_FALSE, modelTransform.data);
+
+    totalMatrix = mat4_mul(projectedViewMatrix, &modelTransform);
+    glUniformMatrix4fv(s->totalTransform, 1, GL_FALSE, totalMatrix.data);
+
+    glUniform1i(s->Texture, 0);
+    texture_bind(entity->texture, 0);
+
+    glUniform1f(s->extra0, entity->texture->number_of_rows);
+    Vec2 tex_offset = Entity_GetTexOffset(entity);
+    glUniform2fv(s->extra1, 1, (float *)&tex_offset);
+
+    glBindVertexArray(mesh->vao);
+    glDrawElements(GL_TRIANGLES, mesh->num_indices, GL_UNSIGNED_SHORT, NULL);
+    glBindVertexArray(0);
+}
+
+/******************************************************************************
+*                                                                             *
+* Function Name: Render_DrawTerrain                                           *
+*                                                                             *
+* Specific shader layout                                                      *
+* -> extra0 Texture_Background                                                *
+* -> extra1 Texture_R                                                         *
+* -> extra2 Texture_G                                                         *
+* -> extra3 Texture_B                                                         *
+* -> extra4 Texture_BlendMap                                                  *
+*                                                                             *
+*******************************************************************************/
+
+void Render_DrawTerrain(Shader *s, Mat4 *projectedViewMatrix, Terrain *terrain)
+{
+    Mat4 totalMatrix;
+    Mat4 modelTransform;
+
+    /* We need the model to world matrix in our shader in order to rotate the normals */
+    modelTransform = mat4_translate(&terrain->position);
+    glUniformMatrix4fv(s->modelToWorld, 1, GL_FALSE, modelTransform.data);
+
+    totalMatrix = mat4_mul(projectedViewMatrix, &modelTransform);
+    glUniformMatrix4fv(s->totalTransform, 1, GL_FALSE, totalMatrix.data);
+
+    /** Set textures for the terrain **/
+
+    glUniform1i(s->extra0, 0);
+    glUniform1i(s->extra1, 1);
+    glUniform1i(s->extra2, 2);
+    glUniform1i(s->extra3, 3);
+    glUniform1i(s->extra4, 4);
+
+    texture_bind(terrain->textures.texture[0], 0);
+    texture_bind(terrain->textures.texture[1], 1);
+    texture_bind(terrain->textures.texture[2], 2);
+    texture_bind(terrain->textures.texture[3], 3);
+    texture_bind(terrain->blendmap, 4);
+
+    /**********************************/
+
+    glBindVertexArray(terrain->mesh->vao);
+    glDrawElements(GL_TRIANGLES, terrain->mesh->num_indices, GL_UNSIGNED_SHORT, NULL);
+    glBindVertexArray(0);
+}
+
+void Render_DrawSky(Shader *s, Mat4 *viewMatrix, Mat4 *projectionMatrix, Skybox *sky)
+{
+    Mat4 myViewMatrix = *viewMatrix;
+    Mat4 totalTransform;
+    Mat4 rotateMatrix = mat4_rotate_y(sky->rotation);
+
+    sky->rotation += SKYBOX_ROTATION_SPEED * Time_GetFrameTime();
+
+    /* We don't want to move the skybox around (We want it to stay with the camera in the midle),
+       just rotate it with the camera so we remove the translations components of the matrix */
+
+    myViewMatrix.data[0 + 3 * 4] = 0.0f;
+    myViewMatrix.data[1 + 3 * 4] = 0.0f;
+    myViewMatrix.data[2 + 3 * 4] = 0.0f;
+
+    myViewMatrix = mat4_mul(&myViewMatrix, &rotateMatrix);
+    totalTransform = mat4_mul(projectionMatrix, &myViewMatrix);
+
+    glUniformMatrix4fv(s->totalTransform, 1, GL_FALSE, totalTransform.data );
+
+    texture_bind(sky->texture, 0);
+    glUniform1i(s->Texture, 0);
+
+    glBindVertexArray(sky->cube->vao);
+    glDrawArrays(GL_TRIANGLES, 0, 36);
+    glBindVertexArray(0);
+}
+
+/******************************************************************************
+*                                                                             *
+* Function Name: Render_DrawParticles                                         *
+*                                                                             *
+* Specific shader layout                                                      *
+* -> extra0 texture atlas number of rows                                      *
+* -> extra1 texture atlas xy offset                                           *
+*                                                                             *
+*******************************************************************************/
+
+void Render_DrawParticles(Shader *s, Mat4 *viewMatrix, Mat4 *projectionMatrix)
+{
+    Mat4 modelTransform, modelViewMatrix, totalTransform, scale;
+    Particle *c = NULL;
+    ParticleSystem *sys = NULL;
+
+    int num_particles = 0;
+    int i, j;
+
+
+    glEnable(GL_BLEND);
+    glDepthMask(GL_FALSE);
+    glUniform1i(s->Texture, 0);
+
+    for(i = 0; i < particles.num_systems; i++)
+    {
+        sys = particles.systems[i];
+
+        texture_bind(sys->texture, 0);
+        glUniform1f(s->extra0, sys->texture->number_of_rows);
+
+        /* Orphane the buffer */
+        glBindBuffer(GL_ARRAY_BUFFER, render.instance_vbo);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 18 * MAX_PARTICLES_PER_SYSTEM, NULL, GL_STREAM_DRAW);
+
+        if(sys->additive)
+            glBlendFunc(GL_SRC_ALPHA, GL_ONE);
+        else
+            glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+        for(j = 0; j < sys->num_particles; j++)
+        {
+            c = &sys->particles[j];
+
+            modelTransform = mat4_translate(&c->position);
+            scale = mat4_scale(c->scale, c->scale, c->scale);
+            modelTransform = mat4_mul(&modelTransform, &scale);
+            /*
+                We eliminate the rotation from the view matrix so the particle is always facing the camera,
+                for this we add the transposed matrix from the rotation part of the viewmatrx and put it
+                on the model transform matrix
+            */
+            modelTransform.data[0]  = viewMatrix->data[0];
+            modelTransform.data[4]  = viewMatrix->data[1];
+            modelTransform.data[8]  = viewMatrix->data[2];
+            modelTransform.data[1]  = viewMatrix->data[4];
+            modelTransform.data[5]  = viewMatrix->data[5];
+            modelTransform.data[9]  = viewMatrix->data[6];
+            modelTransform.data[2]  = viewMatrix->data[8];
+            modelTransform.data[6]  = viewMatrix->data[9];
+            modelTransform.data[10] = viewMatrix->data[10];
+
+            modelViewMatrix = mat4_mul(viewMatrix, &modelTransform);
+            totalTransform = mat4_mul(projectionMatrix, &modelViewMatrix);
+
+            /* Load the texture atlas coods and MVP matrix */
+            glBufferSubData(GL_ARRAY_BUFFER, num_particles * sizeof(GLfloat), sizeof(Vec2), &c->tex_offset);
+            glBufferSubData(GL_ARRAY_BUFFER, (num_particles + 2) * sizeof(GLfloat), sizeof(Mat4), totalTransform.data);
+
+            num_particles += 18;
+        }
+
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+        glBindVertexArray(render.default_quad->vao);
+        glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, num_particles / 18);
+    }
+
+    glBindVertexArray(0);
+
+    glDepthMask(GL_TRUE);
+    glDisable(GL_BLEND);
+}
+
+void Render_EndFrame()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    glViewport(0, 0, render.window->Width, render.window->Height);
+}
+
+void Render_Shutdown()
+{
+    int i;
+
+    glDeleteTextures(1, &render.shadow_map);
+    glDeleteFramebuffers(1, &render.shadow_fbo);
+
+    glDeleteBuffers(1, &render.instance_vbo);
+
+    /* Destroy all created textures */
+    for(i = 0; i < render.num_textures; i++)
+    {
+        texture_purge( render.textures[i] );
+        free(render.textures[i]);
+    }
+
+    /* Destroy all created models */
+    for(i = 0; i < render.num_models; i++)
+    {
+        model_purge(render.models[i]);
+        free(render.models[i]);
+    }
+
+    for(i = 0; i < render.num_meshes; i++)
+    {
+        mesh_purge(render.meshes[i]);
+        free(render.meshes[i]);
+    }
+
+    /* Destroy all created shaders */
+    for(i = 0; i < render.num_shaders; i++)
+    {
+        shader_purge(render.shaders[i]);
+        free(render.shaders[i]);
+    }
+
+    /* Just for checking */
+    printf("%d textures were deleted!\n", render.num_textures);
+    printf("%d models were deleted!\n", render.num_models);
+    printf("%d shaders were deleted!\n", render.num_shaders);
+    printf("%d meshes were deleted!\n", render.num_meshes);
+
+    /* Clear everything */
+    memset( &render, 0, sizeof(Renderer) );
+}
diff --git a/09-september/tomcat/renderer/renderer.h b/09-september/tomcat/renderer/renderer.h
new file mode 100644
index 0000000..791d65d
--- /dev/null
+++ b/09-september/tomcat/renderer/renderer.h
@@ -0,0 +1,86 @@
+#ifndef RENDERER_H
+#define RENDERER_H
+
+#include "../terrain.h"
+#include "../util/array.h"
+#include "vertex.h"
+#include "../particles/particles.h"
+#include "renderer_types.h"
+#include "stdint.h"
+#include "window.h"
+
+#define MAX_STRING_LENGTH 128
+
+#define MAX_TEXTURES 2048
+#define MAX_MODELS   2048
+#define MAX_MESHES   2048
+#define MAX_SHADERS  32
+
+/** Beginning of rendering functions **/
+
+typedef struct _GlInfo
+{
+    char version[MAX_STRING_LENGTH];
+    char shading_version[MAX_STRING_LENGTH];
+    char vendor[MAX_STRING_LENGTH];
+} GlInfo;
+
+typedef struct _Renderer
+{
+    GlInfo info;
+
+    Mesh *default_quad;
+    Shader *default_shader;
+    GLuint instance_vbo;
+
+    Texture *textures[MAX_TEXTURES]; /* All loaded textures */
+    int num_textures;
+
+    Shader *shaders[MAX_SHADERS];    /* All loaded shaders */
+    int num_shaders;
+
+    Model *models[MAX_MODELS];       /* All created shapes */
+    int num_models;
+
+    Mesh *meshes[MAX_MESHES];
+    int num_meshes;
+
+    Window *window;
+
+    GLuint shadow_fbo; /* Frame buffer for shadow mapping */
+    GLuint shadow_map; /* Texture for rendering the shadow map (shadow mapping) */
+    GLuint shadow_color;
+    GLint shadow_width;
+    GLint shadow_height;
+
+    /** TEMP **/
+    Mat4 shadow_mvp;
+    Vec3 inv_light_dir;
+    Shader *shadow_shader;
+
+    /** TEMP **/
+} Renderer;
+extern Renderer render;
+
+extern void Render_Init(Window *window);
+
+extern void Render_BeginFrame();
+
+/* Load lights into the current shader program */
+extern void Render_LoadLights(Shader *shader, const Light *lights, int n);
+
+extern void Render_DrawEntity(Shader *shader, Mat4 *projectedViewMatrix, Entity *entity);
+extern void Render_DrawTerrain(Shader *shader, Mat4 *projectedViewMatrix, Terrain *terrain);
+extern void Render_DrawSky(Shader *shader, Mat4 *viewMatrix, Mat4 *projectionMatrix, Skybox *sky);
+extern void Render_DrawParticles(Shader *shader, Mat4 *viewMatrix, Mat4 *projectionMatrix);
+
+extern void Render_EndFrame();
+
+extern void Render_Shutdown();
+
+extern Mat4 Entity_GetModelTransform(Entity* entity);
+extern Vec2 Entity_GetTexOffset(Entity *entity);
+
+/** End of rendering functions **/
+
+#endif // RENDERER_H
diff --git a/09-september/tomcat/renderer/renderer_types.h b/09-september/tomcat/renderer/renderer_types.h
new file mode 100644
index 0000000..cd07a20
--- /dev/null
+++ b/09-september/tomcat/renderer/renderer_types.h
@@ -0,0 +1,47 @@
+#ifndef RENDERER_TYPES_H
+#define RENDERER_TYPES_H
+
+#define SKYBOX_ROTATION_SPEED 1.0f
+
+#include "../util/str.h"
+#include "../util/array.h"
+
+#include "../math/vector.h"
+#include "../math/matrix4x4.h"
+
+#include "shader.h"
+#include "texture.h"
+#include "model.h"
+
+typedef struct _Material
+{
+    Texture *normal_map;
+    GLfloat shine_damper;
+    GLfloat reflectivity;
+} Material;
+
+typedef struct
+{
+    Texture *texture;
+    Mesh *cube;
+    GLfloat rotation;
+} Skybox;
+
+typedef struct _Entity
+{
+    Model *model;
+    Texture *texture;
+    Vec3 position;
+    float rotX, rotY, rotZ;
+    int index; /* Index inside a texture atlas should default to 0 */
+    float scale[3];
+} Entity;
+
+typedef struct
+{
+    Vec3 position;
+    Vec4 color;
+    Vec3 attenuation;
+} Light;
+
+#endif // RENDERER_TYPES_H
diff --git a/09-september/tomcat/renderer/shader.c b/09-september/tomcat/renderer/shader.c
new file mode 100644
index 0000000..3f6a5d7
--- /dev/null
+++ b/09-september/tomcat/renderer/shader.c
@@ -0,0 +1,187 @@
+#include "renderer.h"
+#include "../util/util.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_HASH_SHADER   16
+static Shader *shader_hash_table[MAX_HASH_SHADER];
+
+static void CompileShader(const char *source, GLuint shaderID)
+{
+    glShaderSource(shaderID, 1, &source, 0);
+    glCompileShader(shaderID);
+    GLint error;
+    glGetShaderiv(shaderID, GL_COMPILE_STATUS, &error);
+    if(error != GL_TRUE)
+    {
+        GLint logLenth;
+        glGetShaderiv(shaderID, GL_INFO_LOG_LENGTH, &logLenth);
+        GLchar buffer[logLenth];
+        glGetShaderInfoLog(shaderID, logLenth, &logLenth, buffer);
+        glDeleteShader(shaderID);
+        Util_FatalError("Some shader failed to compile:\n%s", buffer);
+    }
+}
+
+Shader *shader_new(const char *name, const char *vertexShaderPath, const char *fragShaderPath)
+{
+    if(strlen(name) >= MAX_PATH_LENGTH)
+        Util_FatalError("File following shader name is too long: %s", name);
+
+    Shader *s;
+    s = shader_get(name);
+    if(s != NULL)
+        return s;
+
+    char *vertexShaderSource = Util_LoadFile(vertexShaderPath);
+    char *fragmentShaderSource = Util_LoadFile(fragShaderPath);
+
+    GLuint vs = 0, fs = 0, program;
+    vs = glCreateShader(GL_VERTEX_SHADER);
+    fs = glCreateShader(GL_FRAGMENT_SHADER);
+
+    if(vs == 0 || fs == 0)
+        Util_FatalError("Shaders could not be created\n");
+
+    program = glCreateProgram();
+
+    CompileShader(vertexShaderSource, vs);
+    CompileShader(fragmentShaderSource, fs);
+
+    glAttachShader(program, vs);
+    glAttachShader(program, fs);
+
+    glLinkProgram(program);
+
+    GLint error;
+    glGetProgramiv(program, GL_LINK_STATUS, &error);
+
+    if(error != GL_TRUE)
+    {
+        GLint logLength;
+        glGetProgramiv(program, GL_INFO_LOG_LENGTH, &logLength);
+
+        GLchar buffer[logLength];
+        glGetProgramInfoLog(program, logLength, &logLength, buffer);
+
+        glDeleteProgram(program);
+        glDeleteShader(vs);
+        glDeleteShader(fs);
+
+        Util_FatalError("Shader program failed to link!:\n%s", buffer);
+    }
+    /** Free some usless resources **/
+    glDetachShader(program, vs);
+    glDetachShader(program, fs);
+    glDeleteShader(vs);
+    glDeleteShader(fs);
+
+    free(vertexShaderSource);
+    free(fragmentShaderSource);
+
+    /** Alloc the new texture **/
+    s = malloc( sizeof(Shader) );
+    memset(s, 0, sizeof(Shader) );
+    s->id = program;
+
+    /** Register inside the resource manager **/
+    unsigned int hash_ = Util_Hash( name );
+    hash_ %= MAX_HASH_SHADER;
+
+    render.shaders[render.num_shaders] = s;
+    render.num_shaders += 1;
+
+    strcpy(s->name, name);
+    s->_hash_next = shader_hash_table[hash_];
+    shader_hash_table[hash_] = s;
+
+    s->_hash = hash_;
+
+    /** Return the final result **/
+    return s;
+}
+
+Shader *shader_get(const char *name)
+{
+    Shader *s;
+
+    unsigned int hash_ = Util_Hash( name );
+    hash_ %= MAX_HASH_SHADER;
+
+    if(shader_hash_table[hash_] != NULL)
+    {
+        for(s = shader_hash_table[hash_]; s; s = s->_hash_next)
+        {
+            if( s->_hash == hash_ )
+                return s;
+        }
+    }
+    return NULL;
+}
+
+void shader_purge(Shader *shader)
+{
+    /** Purge the opengl data **/
+    if(shader->id != 0)
+    {
+        glUseProgram(0);
+        glDeleteProgram(shader->id);
+        shader->id = 0;
+    }
+}
+
+GLint shader_get_uniform_location( Shader *s, const char *uniformName )
+{
+    GLint u = glGetUniformLocation(s->id, uniformName);
+    if(u == GL_INVALID_INDEX)
+        Util_FatalError("Uniform \"%s\" could not be found!", uniformName);
+    else
+        return u;
+
+    return 0;
+}
+
+GLint shader_get_attrib_location( Shader *s, const char *attributeName )
+{
+    GLint attrLocation = glGetAttribLocation(s->id, attributeName);
+    if(attrLocation < 0)
+        Util_FatalError("Attribute \"%s\" could not be found!\n", attributeName);
+    return attrLocation;
+}
+
+void shader_set_uniform_mat4( Shader *s, const char *name, const float matrix[16] )
+{
+    GLint location = shader_get_uniform_location(s, name);
+    glUniformMatrix4fv(location, 1, GL_FALSE, matrix);
+}
+
+void shader_set_uniform_float( Shader *s, const char *name, const float val )
+{
+    GLint location = shader_get_uniform_location(s, name);
+    glUniform1f(location, val);
+}
+
+void shader_set_uniform_vec2( Shader *s, const char *name, const float vec[2] )
+{
+    GLint location = shader_get_uniform_location(s, name);
+    glUniform2fv(location, 1, vec);
+}
+
+void shader_set_uniform_vec3( Shader *s, const char *name, const float vec[3] )
+{
+    GLint location = shader_get_uniform_location(s, name);
+    glUniform3fv(location, 1, vec);
+}
+
+void shader_set_uniform_vec4( Shader *s, const char *name, const float vec[4] )
+{
+    GLint location = shader_get_uniform_location(s, name);
+    glUniform4fv(location, 1, vec);
+}
+
+void shader_set_uniform_int( Shader *s, const char *name, const int val )
+{
+    GLint location = shader_get_uniform_location(s, name);
+    glUniform1i(location, val);
+}
diff --git a/09-september/tomcat/renderer/shader.h b/09-september/tomcat/renderer/shader.h
new file mode 100644
index 0000000..e4889f3
--- /dev/null
+++ b/09-september/tomcat/renderer/shader.h
@@ -0,0 +1,59 @@
+#ifndef SHADER_H
+#define SHADER_H
+
+#include "../shared.h"
+
+typedef struct _Shader
+{
+    GLuint id;
+    char name[MAX_PATH_LENGTH];
+
+    /* Layout */
+
+    /* Program Attributes */
+    GLint position;
+    GLint uv;
+    GLint normal;
+    GLint tangent;
+
+    /* Program Uniforms */
+    GLint totalTransform;
+    GLint modelToWorld;
+    GLint lightPosition;
+    GLint ambientLight;
+    GLint lightColor;
+    GLint lightAttenuation;
+    GLint World_eyePosition;
+    GLint Texture;
+    GLint Normal_Map;
+
+    /* Program Multi Purpose Uniforms */
+    GLint extra0;
+    GLint extra1;
+    GLint extra2;
+    GLint extra3;
+    GLint extra4;
+    GLint extra5;
+
+    struct _Shader *_hash_next;
+    unsigned int _hash;
+} Shader;
+
+/** Shaders **/
+extern Shader *shader_new(const char *name, const char *vertexShaderPath, const char *fragShaderPath);
+extern Shader *shader_get(const char *name);
+extern void shader_purge(Shader *shader);
+/**         **/
+
+/** Shader functions **/
+extern GLint shader_get_uniform_location( Shader *s, const char *uniformName );
+extern GLint shader_get_attrib_location( Shader *s, const char *attributeName );
+extern void shader_set_uniform_mat4( Shader *s, const char *name, const float matrix[16] );
+extern void shader_set_uniform_float( Shader *s, const char *name, const float val );
+extern void shader_set_uniform_vec2( Shader *s, const char *name, const float vec[2] );
+extern void shader_set_uniform_vec3( Shader *s, const char *name, const float vec[3] );
+extern void shader_set_uniform_vec4( Shader *s, const char *name, const float vec[4] );
+extern void shader_set_uniform_int( Shader *s, const char *name, const int val );
+/**                  **/
+
+#endif // SHADER_H
diff --git a/09-september/tomcat/renderer/texture.c b/09-september/tomcat/renderer/texture.c
new file mode 100644
index 0000000..e653c5a
--- /dev/null
+++ b/09-september/tomcat/renderer/texture.c
@@ -0,0 +1,188 @@
+#include "../util/util.h"
+#include "renderer.h"
+#include "texture.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+
+#define MAX_HASH_TEXTURES 1024
+static Texture *texture_hash_table[MAX_HASH_TEXTURES];
+
+Texture *texture_new(const char *path)
+{
+    return texture_with_name_new(path, path);
+}
+
+Texture *texture_with_name_new(const char *name, const char *path)
+{
+    if(strlen(name) > MAX_PATH_LENGTH)
+        Util_FatalError("File following texture name is too long: %s", name);
+
+    Texture *tex;
+    tex = texture_get(name);
+
+    if(tex != NULL)
+        return tex;
+
+    if(render.num_textures >= MAX_TEXTURES)
+        return NULL;
+
+    /** Alloc the new texture **/
+    tex = malloc( sizeof(Texture) );
+    memset(tex, 0, sizeof(Texture) );
+    tex->number_of_rows = 1;
+    tex->type = GL_TEXTURE_2D;
+
+    SDL_Surface *data = IMG_Load(path);
+
+    if(data == NULL)
+        Util_FatalError("Texture %s could not be found!\n", path);
+
+    glGenTextures(1, &tex->tex_id);
+    glBindTexture(GL_TEXTURE_2D, tex->tex_id);
+
+    SDL_LockSurface(data);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, data->w, data->h, GL_FALSE, GL_RGBA, GL_UNSIGNED_BYTE, data->pixels);
+    SDL_UnlockSurface(data);
+    SDL_FreeSurface(data);
+
+    /** Configure the texture **/
+    glGenerateMipmap(GL_TEXTURE_2D);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, -2.4);
+
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    /** Register inside the resource manager **/
+    unsigned int hash_ = Util_Hash( name );
+    hash_ %= MAX_HASH_TEXTURES;
+
+    render.textures[render.num_textures] = tex;
+    render.num_textures += 1;
+
+    strcpy(tex->_name, name);
+    tex->_hash_next = texture_hash_table[hash_];
+    texture_hash_table[hash_] = tex;
+
+    tex->hash_ = hash_;
+
+    /** Return the final result **/
+    return tex;
+}
+
+Texture *texture_cubemap_new(const char *paths[6])
+{
+    return texture_cubemap_with_name_new(paths[0], paths);
+}
+
+Texture *texture_cubemap_with_name_new(const char *name, const char *paths[6])
+{
+    Texture *tex;
+    tex = texture_get(name);
+
+    if(tex != NULL)
+    {
+        puts("s");
+        return tex;
+    }
+
+    if(render.num_textures >= MAX_TEXTURES)
+        return NULL;
+
+    /** Alloc the new texture **/
+    tex = malloc( sizeof(Texture) );
+    memset(tex, 0, sizeof(Texture) );
+    tex->number_of_rows = 1;
+    tex->type = GL_TEXTURE_CUBE_MAP;
+
+    glGenTextures(1, &tex->tex_id);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, tex->tex_id);
+
+    SDL_Surface *data;
+
+    int i;
+    for(i = 0; i < 6; i++)
+    {
+        data = IMG_Load(paths[i]);
+
+        if(data == NULL)
+            Util_FatalError("Texture %s could not be found!\n", paths[i]);
+
+        SDL_LockSurface(data);
+        /** All the textures sides are linearly stored so we just add "i" **/
+        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGBA,
+                     data->w, data->h, GL_FALSE, GL_RGBA, GL_UNSIGNED_BYTE, data->pixels);
+
+        SDL_UnlockSurface(data);
+        SDL_FreeSurface(data);
+    }
+
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+
+    /** Register inside the resource manager **/
+    unsigned int hash_ = Util_Hash( name );
+    hash_ %= MAX_HASH_TEXTURES;
+
+    render.textures[render.num_textures] = tex;
+    render.num_textures += 1;
+
+    strcpy(tex->_name, name);
+    tex->_hash_next = texture_hash_table[hash_];
+    texture_hash_table[hash_] = tex;
+
+    tex->hash_ = hash_;
+
+    /** Return the final result **/
+    return tex;
+}
+
+Texture *texture_get(const char *name)
+{
+    Texture *tex;
+
+    unsigned int hash_ = Util_Hash( name );
+    hash_ %= MAX_HASH_TEXTURES;
+
+    if(texture_hash_table[hash_] != NULL)
+    {
+        for(tex = texture_hash_table[hash_]; tex; tex = tex->_hash_next)
+        {
+            if( tex->hash_ == hash_ )
+                return tex;
+        }
+    }
+    return NULL;
+}
+
+void texture_bind(Texture *tex, int slot)
+{
+    glActiveTexture(GL_TEXTURE0 + slot);
+
+    if(tex->type != GL_TEXTURE_2D && tex->type != GL_TEXTURE_CUBE_MAP)
+        return;
+
+
+    glBindTexture(tex->type, tex->tex_id);
+}
+
+void texture_purge(Texture *tex)
+{
+    /** Purge the opengl data **/
+    if(tex->tex_id != 0)
+    {
+        glDeleteTextures(1, &tex->tex_id);
+        tex->tex_id = 0;
+    }
+}
diff --git a/09-september/tomcat/renderer/texture.h b/09-september/tomcat/renderer/texture.h
new file mode 100644
index 0000000..8288c72
--- /dev/null
+++ b/09-september/tomcat/renderer/texture.h
@@ -0,0 +1,30 @@
+#ifndef TEXTURE_H
+#define TEXTURE_H
+
+#include "../shared.h"
+
+typedef struct _Texture
+{
+    GLuint tex_id;
+    GLenum type;
+
+    int number_of_rows; /* used for texture atlases */
+
+    char _name[MAX_PATH_LENGTH];
+    unsigned int hash_;
+    struct _Texture *_hash_next; /* linked list for storing on hash table */
+
+} Texture;
+
+extern Texture *texture_new(const char *name);
+extern Texture *texture_with_name_new(const char *name, const char *path);
+
+extern Texture *texture_cubemap_new(const char *paths[6]);
+extern Texture *texture_cubemap_with_name_new(const char *name, const char *paths[6]);
+
+extern Texture *texture_get(const char *name);
+extern void texture_bind(Texture *tex, int slot);
+
+extern void texture_purge(Texture *tex); /* Clean the texture without freeing the container */
+
+#endif // TEXTURE_H
diff --git a/09-september/tomcat/renderer/vertex.h b/09-september/tomcat/renderer/vertex.h
new file mode 100644
index 0000000..6a79dde
--- /dev/null
+++ b/09-september/tomcat/renderer/vertex.h
@@ -0,0 +1,15 @@
+#ifndef VERTEX_H
+#define VERTEX_H
+
+#include <GL/glew.h>
+#include "../math/vector.h"
+
+typedef struct
+{
+    Vec3 position;
+    Vec2 texCoord;
+    Vec3 normal;
+    Vec3 tangent;
+} vertex_t;
+
+#endif // VERTEX_H
diff --git a/09-september/tomcat/renderer/window.c b/09-september/tomcat/renderer/window.c
new file mode 100644
index 0000000..d5db1eb
--- /dev/null
+++ b/09-september/tomcat/renderer/window.c
@@ -0,0 +1,49 @@
+#include "window.h"
+#include "../util/util.h"
+#include <stdlib.h>
+
+Window* window_new(const char* title, Uint32 width, Uint32 height)
+{
+    Window* window = malloc(sizeof(Window));
+    window->title = title;
+    window->Width = width;
+    window->Height = height;
+
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+    //SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+    //SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
+
+    window->window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
+                                      width, height, SDL_WINDOW_OPENGL);
+    if(window->window == NULL)
+        Util_FatalError( "The window could not be created:\n%s", SDL_GetError() );
+
+    window->context = SDL_GL_CreateContext(window->window);
+
+    if(window->context == NULL)
+        Util_FatalError( "Context could not be created:\n%s", SDL_GetError() );
+
+    glViewport(0, 0, width, height);
+
+    return window;
+}
+
+void window_resize(Window* window, Uint32 width, Uint32 height)
+{
+    window->Width = width;
+    window->Height = height;
+    SDL_SetWindowSize(window->window, width, height);
+    glViewport(0, 0, width, height);
+}
+
+void window_update(Window* window)
+{
+    SDL_GL_SwapWindow(window->window);
+}
+
+void window_destroy(Window* window)
+{
+    SDL_GL_DeleteContext(window->context);
+    SDL_DestroyWindow(window->window);
+    free(window);
+}
diff --git a/09-september/tomcat/renderer/window.h b/09-september/tomcat/renderer/window.h
new file mode 100644
index 0000000..608937a
--- /dev/null
+++ b/09-september/tomcat/renderer/window.h
@@ -0,0 +1,20 @@
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <SDL2/SDL.h>
+#include <GL/glew.h>
+
+typedef struct
+{
+    SDL_Window* window;
+    SDL_GLContext context;
+    Uint32 Width, Height;
+    const char* title;
+} Window;
+
+extern Window* window_new(const char* title, Uint32 width, Uint32 height);
+extern void window_resize(Window* window, Uint32 width, Uint32 height);
+extern void window_update(Window* window);
+extern void window_destroy(Window* window);
+
+#endif // WINDOW_H
diff --git a/09-september/tomcat/shared.h b/09-september/tomcat/shared.h
new file mode 100644
index 0000000..35fd471
--- /dev/null
+++ b/09-september/tomcat/shared.h
@@ -0,0 +1,13 @@
+#ifndef SHARED_H
+#define SHARED_H
+
+#include "GL/glew.h"
+#define MAX_PATH_LENGTH 64
+
+typedef enum
+{
+    FALSE,
+    TRUE
+} boolean;
+
+#endif // SHARED_H
diff --git a/09-september/tomcat/terrain.c b/09-september/tomcat/terrain.c
new file mode 100644
index 0000000..f23d057
--- /dev/null
+++ b/09-september/tomcat/terrain.c
@@ -0,0 +1,155 @@
+#include "terrain.h"
+#include "math/math_util.h"
+#include "math/vector.h"
+#include "util/util.h"
+#include "renderer/renderer.h"
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+#include <math.h>
+
+#define PLANE_SIZE 128
+#define PLANE_MAX_HEIGHT 10
+
+#define NUM_ARRAY_ELEMENTS(a) sizeof(a) / sizeof(*a)
+
+static float GetHeight(int x, int y, SDL_Surface* surface)
+{
+    if(x < 0 || x >= surface->w || y < 0 || y >= surface->h)
+        return 0.0f;
+
+    Uint32 pixel = ( (Uint32*)surface->pixels )[y * surface->w + x];
+    Uint8 r, g, b;
+    SDL_GetRGB(pixel, surface->format, &r, &g, &b);
+
+    float height = (float)r / 255.0f;
+
+    return height * 40.0f;
+}
+
+static Vec3 GenerateNomal(int x, int y, SDL_Surface* surface)
+{
+    float hLeft  = GetHeight(x-1, y, surface);
+    float hRight = GetHeight(x+1, y, surface);
+    float hUp    = GetHeight(x, y+1, surface);
+    float hDown  = GetHeight(x, y-1, surface);
+
+    Vec3 normal = { hLeft - hRight, 2.0f, hDown - hUp};
+    return vec3_normalize(&normal);
+}
+
+GLfloat Terrain_GetHeightOfTerrain(Terrain *terrain, GLfloat x, GLfloat z)
+{
+    GLfloat terrainX = x - terrain->position.x;
+    GLfloat terrainZ = z - terrain->position.z;
+
+    GLfloat gridSquareSize = (float)terrain->l / ( (float)PLANE_SIZE - 1 );
+
+    GLint gridX = (GLint) floor(terrainX / gridSquareSize);
+    GLint gridZ = (GLint) floor(terrainZ / gridSquareSize);
+
+    if(gridX >= PLANE_SIZE - 1 || gridX < 0 || gridZ >= PLANE_SIZE - 1 || gridZ < 0)
+    {
+        printf("called\n");
+        return 0;
+    }
+
+    GLfloat xCoord = fmod(terrainX, gridSquareSize) / gridSquareSize;
+    GLfloat zCoord = fmod(terrainZ, gridSquareSize) / gridSquareSize;
+    GLfloat answer;
+
+    /* Determine in which triangle of the square are we. "Bary Centric Interpolation"*/
+    if(xCoord <= (1 - zCoord)){
+        /* 0, heights[gridX][gridZ], 0) */
+        Vec3 p1 = { 0, terrain->height[ gridX * PLANE_SIZE + gridZ ], 0 };
+        /* 1, heights[gridX + 1][gridZ], 0) */
+        Vec3 p2 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + gridZ ], 0};
+        /* 0, heights[gridX][gridZ + 1], 1) */
+        Vec3 p3 = { 0, terrain->height[ gridX * PLANE_SIZE + (gridZ + 1) ], 1};
+
+        Vec2 pos = {xCoord, zCoord};
+
+        answer = baryCentric(&p1, &p2, &p3, &pos);
+    } else {
+        /* (1, heights[gridX + 1][gridZ], 0) */
+        Vec3 p1 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + gridZ ], 0 };
+        /* (1, heights[gridX + 1][gridZ + 1], 1) */
+        Vec3 p2 = { 1, terrain->height[ (gridX + 1) * PLANE_SIZE + (gridZ + 1) ], 1};
+        /* (0, heights[gridX][gridZ + 1], 1) */
+        Vec3 p3 = { 0, terrain->height[ gridX * PLANE_SIZE + (gridZ + 1) ], 1};
+        Vec2 pos = {xCoord, zCoord};
+
+        answer = baryCentric(&p1, &p2, &p3, &pos);
+    }
+
+    return answer;
+}
+
+Terrain *Terrain_Create( int w, int l, const char* heightmap_path, Texture *blendmap, TerrainTexturePack *textures )
+{
+    Terrain *terrain = malloc( sizeof(Terrain) );
+    terrain->height = (GLfloat*) malloc( sizeof(GLfloat) * PLANE_SIZE * PLANE_SIZE);
+
+    terrain->blendmap = blendmap;
+    terrain->w = w; terrain->l = l;
+    terrain->textures = *textures;
+
+    SDL_Surface* surface = IMG_Load(heightmap_path);
+    if(surface == NULL)
+        Util_FatalError("Heightmap file could not be loaded\n");
+
+    vertex_t data[PLANE_SIZE * PLANE_SIZE];
+    int x, y;
+    for(x = 0; x < PLANE_SIZE; x++)
+    {
+        for(y = 0; y < PLANE_SIZE; y++)
+        {
+            vertex_t* v = &data[y + x * PLANE_SIZE];
+            v->position = (Vec3){ (float)x / (float)PLANE_SIZE, 0.0f, (float)y / (float)PLANE_SIZE };
+            /* Heightmap cordinates */
+            int image_x = v->position.x * surface->w, image_y = v->position.z * surface->h;
+
+            v->texCoord = (Vec2){ v->position.x, v->position.z };
+            GLfloat height = GetHeight(image_x, image_y, surface);
+            terrain->height[y + x * PLANE_SIZE] = height;
+            v->position.y = height;
+            v->position.x *= w;
+            v->position.z *= l;
+
+            v->normal = GenerateNomal(image_x, image_y, surface);
+        }
+    }
+
+    int runner = 0;
+    GLushort indices[ (PLANE_SIZE-1) * (PLANE_SIZE-1) * 6 ];
+    for(x = 0; x < PLANE_SIZE-1; x++)
+    {
+        for(y = 0; y < PLANE_SIZE-1; y++)
+        {
+            indices[runner++] = PLANE_SIZE * x + y;
+            indices[runner++] = PLANE_SIZE * x + y + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE;
+
+            indices[runner++] = PLANE_SIZE * x + y + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE + 1;
+            indices[runner++] = PLANE_SIZE * x + y + PLANE_SIZE;
+        }
+    }
+
+    GLsizeiptr vertexBufferSize = NUM_ARRAY_ELEMENTS(data) * sizeof(vertex_t);
+    GLsizeiptr indexBufferSize = NUM_ARRAY_ELEMENTS(indices) * sizeof(GLushort);
+
+    SDL_FreeSurface(surface);
+
+    terrain->mesh = mesh_new(data, vertexBufferSize, indices, indexBufferSize);
+    return terrain;
+}
+
+void Terrain_Destroy( Terrain *terrain )
+{
+    if(terrain->height)
+        free(terrain->height);
+
+    free(terrain);
+}
+
diff --git a/09-september/tomcat/terrain.h b/09-september/tomcat/terrain.h
new file mode 100644
index 0000000..b321e5f
--- /dev/null
+++ b/09-september/tomcat/terrain.h
@@ -0,0 +1,27 @@
+#ifndef TERRAIN_H
+#define TERRAIN_H
+
+#include "renderer/renderer_types.h"
+#include "math/vector.h"
+
+typedef struct
+{
+    Texture *texture[4];
+} TerrainTexturePack;
+
+typedef struct
+{
+    Mesh *mesh;
+    Texture *blendmap;
+    TerrainTexturePack textures;
+
+    GLfloat *height;
+    int w, l;
+    Vec3 position;
+} Terrain;
+
+extern Terrain *Terrain_Create( int w, int l, const char* heightmap_path, Texture *blendmap, TerrainTexturePack *textures);
+extern GLfloat Terrain_GetHeightOfTerrain(Terrain *terrain, GLfloat x, GLfloat z);
+extern void Terrain_Destroy( Terrain *terrain );
+
+#endif // TERRAIN_H
diff --git a/09-september/tomcat/util/array.c b/09-september/tomcat/util/array.c
new file mode 100644
index 0000000..13660e0
--- /dev/null
+++ b/09-september/tomcat/util/array.c
@@ -0,0 +1,102 @@
+#include "array.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#define ARRAY_GROWTH_FACTOR 2
+#define MAX(x, y) ( (x > y) ? x : y )
+
+typedef struct _RealArray
+{
+    char *data;
+    unsigned int length; /* Number of elements */
+
+    unsigned int type_size;
+    unsigned int capacity; /* Array capacity in elements number */
+    bool clear;
+} RealArray;
+
+static void array_check_for_expand(RealArray *arr, unsigned int length);
+
+Array *array_create(unsigned int type_size)
+{
+    return array_create_by_size(type_size, 0);
+}
+
+Array *array_create_by_size(unsigned int type_size, unsigned int reserved_size)
+{
+    RealArray *arr = malloc( sizeof(RealArray) );
+    arr->capacity = 0;
+    arr->data = NULL;
+    arr->length = 0;
+    arr->type_size = type_size;
+
+    if(reserved_size != 0)
+    {
+        array_check_for_expand(arr, reserved_size);
+    }
+
+    return (Array *)arr;
+}
+
+void array_append(Array *arr, void *data)
+{
+    RealArray *r_arr = (RealArray *)arr;
+    array_check_for_expand(r_arr, 1);
+
+    memcpy(r_arr->data + r_arr->length * r_arr->type_size, data, r_arr->type_size);
+    r_arr->length += 1;
+}
+
+void array_insert(Array *arr, int index, void *data)
+{
+    RealArray *r_arr = (RealArray *)arr;
+    array_check_for_expand(r_arr, 1);
+
+    /* Shift everything one place */
+    memmove(r_arr->data + (index + 1) * r_arr->type_size,
+            r_arr->data +  index * r_arr->type_size,
+            r_arr->length * r_arr->type_size - index * r_arr->type_size);
+
+	/* Insert the new data */
+	memcpy(r_arr->data + index * r_arr->type_size, data, r_arr->type_size);
+
+	r_arr->length += 1;
+}
+
+void array_remove(Array *arr, int index)
+{
+
+}
+
+void array_reserve(Array *arr, unsigned int length)
+{
+
+}
+
+unsigned int array_get_type_size(Array *arr)
+{
+    RealArray *r_arr = (RealArray *)arr;
+    return r_arr->type_size;
+}
+
+void array_free(Array *arr)
+{
+    RealArray *r_arr = (RealArray *)arr;
+
+    free(r_arr->data);
+    free(r_arr);
+}
+
+static void array_check_for_expand(RealArray *arr, unsigned int length)
+{
+    RealArray *r_arr = (RealArray *)arr;
+
+    unsigned int expected_size = r_arr->length + length;
+
+    if(r_arr->capacity < expected_size)
+    {
+        r_arr->capacity = MAX(ARRAY_GROWTH_FACTOR * r_arr->capacity, expected_size);
+        r_arr->data = realloc(r_arr->data, r_arr->capacity * r_arr->type_size);
+    }
+}
diff --git a/09-september/tomcat/util/array.h b/09-september/tomcat/util/array.h
new file mode 100644
index 0000000..1444a74
--- /dev/null
+++ b/09-september/tomcat/util/array.h
@@ -0,0 +1,23 @@
+#ifndef ARRAY_H
+#define ARRAY_H
+
+#include <stdbool.h>
+
+typedef struct
+{
+    char *data;
+    unsigned int length;
+} Array;
+
+extern Array *array_create(unsigned int type_size);
+extern Array *array_create_by_size(unsigned int type_size, unsigned int reserved_size);
+
+extern void array_append(Array *arr, void *data);
+extern void array_insert(Array *arr, int index, void *data);
+extern void array_remove(Array *arr, int index);
+extern void array_reserve(Array *arr, unsigned int length);
+extern unsigned int array_get_type_size(Array *arr);
+
+extern void array_free(Array *arr);
+
+#endif // ARRAY_H
diff --git a/09-september/tomcat/util/str.c b/09-september/tomcat/util/str.c
new file mode 100644
index 0000000..295b390
--- /dev/null
+++ b/09-september/tomcat/util/str.c
@@ -0,0 +1,121 @@
+#include "str.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+/* Note, we add always 1 to length for the \0 character */
+
+static void string_check_for_expand( String *string_, unsigned int length )
+{
+    if(string_->length + length >= string_->allocated_length)
+    {
+        string_->allocated_length = string_->length + length + 1;
+        string_->data = realloc(string_->data, string_->allocated_length * sizeof(char) );
+    }
+}
+
+String *string_create( const char *init )
+{
+    String *str;
+
+    if(init == NULL || *init == '\0')
+    {
+        str = string_create_by_size(1);
+    }
+    else
+    {
+        unsigned int len = strlen(init);
+        str = string_create_by_size(len + 1);
+        string_append(str, init);
+    }
+
+    return str;
+}
+
+String *string_create_by_size( unsigned int reserved_size)
+{
+    String *str = malloc( sizeof(String) );
+
+    str->data = NULL;
+    str->length = 0;
+    str->allocated_length = 0;
+
+    string_check_for_expand(str, reserved_size);
+
+    str->data[0] = 0;
+    return str;
+}
+
+void string_assign( String *string_, const char *val )
+{
+
+}
+
+void string_append( String *string_, const char *val )
+{
+    string_insert(string_, string_->length, val);
+}
+
+void string_append_char( String *string_, char c )
+{
+    string_insert(string_, string_->length, &c);
+}
+
+void string_insert( String *string_, int index, const char *val)
+{
+    if(index > string_->length)
+        return;
+
+    unsigned int length = strlen(val);
+    string_check_for_expand(string_, length);
+
+    if(index == string_->length - 1)
+    {
+        strcpy(string_->data + string_->length, val);
+    }
+    else
+    {
+        memmove(string_->data + index + length,
+                string_->data + index,
+                (string_->length - index) * sizeof(char) );
+
+        memcpy(string_->data + index, val, length * sizeof(char) );
+    }
+
+    string_->length += length;
+    string_->data[string_->length] = '\0';
+}
+
+void string_insert_char( String *string_, int index, char val)
+{
+    string_insert(string_, index, &val);
+}
+
+void string_free( String *string_ )
+{
+    if(string_)
+    {
+        free(string_->data);
+        free(string_);
+    }
+}
+
+unsigned int string_hash( String *string_ )
+{
+    unsigned int hash, i;
+    for(hash = i = 0; i < string_->length; ++i)
+    {
+        hash += string_->data[i];
+        hash += (hash << 10);
+        hash ^= (hash >> 6);
+    }
+    hash += (hash << 3);
+    hash ^= (hash >> 11);
+    hash += (hash << 15);
+    return hash;
+}
+
+bool string_equal( String *a, String *b )
+{
+    return !strcmp(a->data, b->data);
+}
diff --git a/09-september/tomcat/util/str.h b/09-september/tomcat/util/str.h
new file mode 100644
index 0000000..d8182e1
--- /dev/null
+++ b/09-september/tomcat/util/str.h
@@ -0,0 +1,29 @@
+#ifndef STR_H
+#define STR_H
+
+#include <stdbool.h>
+
+typedef struct _String
+{
+    char *data;
+    unsigned int length;
+    unsigned int allocated_length;
+} String;
+
+extern String *string_create( const char *init );
+extern String *string_create_by_size( unsigned int reserved_size);
+
+extern void string_assign( String *string_, const char *val );
+
+extern void string_append( String *string_, const char *val );
+extern void string_append_char( String *string_, char c );
+
+extern void string_insert( String *string_, int index, const char *val);
+extern void string_insert_char( String *string_, int index, char val);
+
+extern void string_free( String *string_ );
+
+extern unsigned int string_hash( String *string_ );
+extern bool string_equal( String *a, String *b );
+
+#endif // STR_H
diff --git a/09-september/tomcat/util/util.c b/09-september/tomcat/util/util.c
new file mode 100644
index 0000000..22eb0fc
--- /dev/null
+++ b/09-september/tomcat/util/util.c
@@ -0,0 +1,138 @@
+#include "util.h"
+
+#include <SDL2/SDL.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+unsigned int Util_Hash( const char *str )
+{
+    unsigned int hash, i, length;
+    length = strlen(str);
+
+    for(hash = i = 0; i < length; ++i)
+    {
+        hash += str[i];
+        hash += (hash << 10);
+        hash ^= (hash >> 6);
+    }
+
+    hash += (hash << 3);
+    hash ^= (hash >> 11);
+    hash += (hash << 15);
+
+    return hash;
+}
+
+void Util_FatalError( const char *fmt, ... )
+{
+    fprintf(stderr, "Fatal Error:\n");
+
+    va_list args;
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args);
+
+    SDL_Quit();
+    exit(1);
+}
+
+void Util_CheckGLError()
+{
+    GLenum error = glGetError();
+    switch(error)
+    {
+        case GL_INVALID_ENUM:
+            fprintf(stderr, "WARNING: GL_INVALID_ENUM\n");
+            break;
+        case GL_INVALID_VALUE:
+            fprintf(stderr, "WARNING: GL_INVALID_VALUE\n");
+            break;
+        case GL_INVALID_OPERATION:
+            fprintf(stderr, "WARNING: GL_INVALID_OPERATION\n");
+            break;
+        case GL_INVALID_FRAMEBUFFER_OPERATION:
+            fprintf(stderr, "WARNING: GL_INVALID_FRAMEBUFFER_OPERATION\n");
+            break;
+        case GL_OUT_OF_MEMORY:
+            fprintf(stderr, "WARNING: GL_OUT_OF_MEMORY\n");
+            break;
+        case GL_STACK_UNDERFLOW:
+            fprintf(stderr, "WARNING: GL_STACK_UNDERFLOW\n");
+            break;
+        case GL_STACK_OVERFLOW:
+            fprintf(stderr, "WARNING: GL_STACK_OVERFLOW\n");
+            break;
+
+        default:
+            break;
+    }
+}
+
+char *Util_LoadFile( const char *path )
+{
+	FILE* file = fopen( path, "r" );
+
+	if(file == NULL)
+    {
+        Util_FatalError("File %s could not be found!\n", path);
+    }
+
+	fseek( file, 0, SEEK_END );
+	size_t sizeOfFile = ftell( file );
+	fseek( file, 0, SEEK_SET );
+	char* file_data = malloc( sizeof(char) * sizeOfFile + 1 );
+	fread( file_data, sizeof(char), sizeOfFile, file );
+	file_data[sizeOfFile] = '\0';
+	fclose(file);
+	return file_data;
+}
+
+float Util_RandomF(float min, float max)
+{
+    return ( min + (float)rand() ) / ( (float)RAND_MAX / (max-min) );
+}
+
+int Util_RandomI(int min, int max)
+{
+    return ( rand() % (max-min) ) + min;
+}
+
+Vec3
+Util_GetMouseRay(int screenWidth, int screenHeigth, Mat4 *viewMatrix, Mat4 *projectionMatrix,
+                 int mouseX, int mouseY)
+{
+    Vec4 eyeCoords;
+    Vec3 mouseRay;
+    /* Normalized device coords NOTE: -y becouse for SDL y = 0 is the top of the screen */
+    GLfloat normalX = ( 2.0f * (GLfloat)mouseX ) / (GLfloat) screenWidth - 1.0f;
+    GLfloat normalY = 1.0f - (2.0f * (GLfloat)mouseY) / (GLfloat) screenHeigth;
+
+    /* clipCoords include 4th component */
+    Vec4 clipCoords = { normalX, normalY, -1.0f, 1.0f };
+
+    /* Remove perpective */
+    {
+        Mat4 invertedProjection = mat4_inverse(projectionMatrix);
+        eyeCoords = mat4_mul_vec4(&invertedProjection, &clipCoords);
+        eyeCoords.z = -1.0f;
+        eyeCoords.w = 0.0f;
+    }
+
+    /* Remove view matrix*/
+    {
+        Mat4 invertedViewMatrix = mat4_inverse(viewMatrix);
+        Vec4 temp = mat4_mul_vec4(&invertedViewMatrix, &eyeCoords);
+
+        mouseRay.x = temp.x;
+        mouseRay.y = temp.y;
+        mouseRay.z = temp.z;
+
+        mouseRay = vec3_normalize(&mouseRay);
+    }
+
+    /* Return the ray in world coordinates */
+    return mouseRay;
+}
diff --git a/09-september/tomcat/util/util.h b/09-september/tomcat/util/util.h
new file mode 100644
index 0000000..f09f7cb
--- /dev/null
+++ b/09-september/tomcat/util/util.h
@@ -0,0 +1,27 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include "../math/matrix4x4.h"
+
+#define toRadians(degrees) (degrees * 3.1415926 / 180.0f)
+#define toDegrees(radians) (radians * 180.0f / 3.1415926)
+
+#ifdef DEBUG
+#include <stdio.h>
+#define myAssert(expr) expr ? 1==1 : fprintf(stderr, "The expresion was not true\n")
+#else
+#define myAssert(expr)
+#endif // DEBUG
+
+extern unsigned int Util_Hash( const char *str );
+extern void Util_FatalError( const char* fmt, ... );
+extern void Util_CheckGLError();
+extern char* Util_LoadFile( const char* path );
+extern float Util_RandomF(float min, float max);
+extern int Util_RandomI(int min, int max);
+
+extern Vec3
+Util_GetMouseRay(int screenWidth, int screenHeigth, Mat4 *viewMatrix, Mat4 *projectionMatrix,
+                 int mouseX, int mouseY);
+
+#endif // UTIL_H
diff --git a/09-september/tomcat/util/util_time.c b/09-september/tomcat/util/util_time.c
new file mode 100644
index 0000000..e56d997
--- /dev/null
+++ b/09-september/tomcat/util/util_time.c
@@ -0,0 +1,52 @@
+#include "util_time.h"
+
+static struct
+{
+    float max_ticks_per_frame; //< cuantos ticks (tiempo demora) un frame
+    Uint32 counted_frames; //< cuantos frames han pasado
+    Uint32 start_ticks;    //< ticks al iniciar la iteracion del loop
+    Uint32 beg_ticks;      //< ticks desde el inicio del juego
+    Uint32 time_per_frame;
+} TIME = {
+    1000.0f / 60.0f,
+    0, 0, 0, 0
+};
+
+void Time_Init()
+{
+    TIME.beg_ticks = SDL_GetTicks();
+}
+
+void Time_Begin()
+{
+    TIME.start_ticks = SDL_GetTicks();
+}
+
+float Time_End()
+{
+    TIME.counted_frames += 1;
+    float FPS = (float)TIME.counted_frames / ( (float)(SDL_GetTicks() - TIME.beg_ticks) / 1000.0f );
+
+    float frameTicks = (float)(SDL_GetTicks() - TIME.start_ticks);
+    TIME.time_per_frame = frameTicks;
+    if(frameTicks < TIME.max_ticks_per_frame){
+        SDL_Delay( (Uint32)(TIME.max_ticks_per_frame - frameTicks) );
+    }
+
+    return FPS;
+}
+
+float Time_GetFrameTime()
+{
+    return (float)TIME.time_per_frame / 1000.0f;
+}
+
+void Time_SetMaxFramesPerSecond(Uint32 frames)
+{
+    TIME.max_ticks_per_frame = 1000.0f / (float)frames;
+}
+
+Uint32 Time_GetCountedFrames()
+{
+    return TIME.counted_frames;
+}
diff --git a/09-september/tomcat/util/util_time.h b/09-september/tomcat/util/util_time.h
new file mode 100644
index 0000000..3c3e470
--- /dev/null
+++ b/09-september/tomcat/util/util_time.h
@@ -0,0 +1,13 @@
+#ifndef UTIL_TIME_H
+#define UTIL_TIME_H
+
+#include <SDL2/SDL.h>
+
+extern void Time_Init( void );
+extern void Time_Begin( void );
+extern float Time_End( void );
+extern void Time_SetMaxFramesPerSecond(Uint32 frames);
+extern float Time_GetFrameTime( void );
+extern Uint32 Time_GetCountedFrames( void );
+
+#endif // UTIL_TIME_H
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f382cf8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,18 @@
+# Tomcat Archive
+
+This repository contains the code of my first experiments using OpenGL. The
+source code is provided as it was in 2016 with only minimal modifications
+(mostly improvements) in the build system.
+
+See the article to this repository: [https://thomaslabs.org/projects/tomcat.html](Tomcat archive)
+
+## Dates of the snapshots
+- 2016-07-31
+- 2016-08-16
+- 2016-09-25
+
+## Dependencies
+- SDL2
+- SDL2 Image
+- OpenGL
+- Glew
diff --git a/manifest.scm b/manifest.scm
new file mode 100644
index 0000000..d4c0233
--- /dev/null
+++ b/manifest.scm
@@ -0,0 +1,5 @@
+(specifications->manifest
+ (list "gcc-toolchain"
+       "sdl2"
+       "sdl2-image"
+       "glew"))