#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);
}
}
