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Add sweet_geometry_cube

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Luc Girod 2014-05-25 00:02:27 +02:00
parent d13e891219
commit 9ef75edb27
2 changed files with 73 additions and 4 deletions
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72
sweet_geometry.c
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@ -475,6 +475,10 @@ sweet_geometry_subdivide_mesh_v (unsigned int nb_iterations, float scale,
}
/* Icosphere */
#define NB_INDICES 60
#define NB_VERTICES 12
static float icosphere_vertices_v[36] = {
-1, SWEET_GOLDEN_RATIO, 0,
1, SWEET_GOLDEN_RATIO, 0,
@ -492,7 +496,7 @@ static float icosphere_vertices_v[36] = {
-SWEET_GOLDEN_RATIO, 0, 1
};
static unsigned int icosphere_indices_v[60] = {
static unsigned int icosphere_indices_v[NB_INDICES] = {
0, 11, 5,
0, 5, 1,
0, 1, 7,
@ -518,8 +522,6 @@ static unsigned int icosphere_indices_v[60] = {
9, 8, 1
};
static unsigned int nb_indices = 60;
static unsigned int nb_vertices_v = 12;
int
sweet_geometry_icosphere (unsigned int nb_iterations, float scale,
@ -527,7 +529,69 @@ sweet_geometry_icosphere (unsigned int nb_iterations, float scale,
unsigned int * count_vertices, float ** mesh_vertices)
{
return sweet_geometry_subdivide_mesh_v (nb_iterations, scale,
nb_indices, icosphere_indices_v, nb_vertices_v, icosphere_vertices_v,
NB_INDICES, icosphere_indices_v, NB_VERTICES, icosphere_vertices_v,
count_indices, mesh_indices, count_vertices, mesh_vertices);
}
#undef NB_INDICES
#undef NB_VERTICES
#define NB_INDICES 36
#define NB_VERTICES 8
static float cube_vertices_v[24] = {
-0.5, -0.5, -0.5,
0.5, -0.5, -0.5,
0.5, -0.5, 0.5,
-0.5, -0.5, 0.5,
-0.5, 0.5, -0.5,
0.5, 0.5, -0.5,
0.5, 0.5, 0.5,
-0.5, 0.5, 0.5
};
static unsigned int cube_indices_v[NB_INDICES] = {
2, 3, 0,
0, 1, 2,
4, 7, 6,
6, 5, 4,
0, 3, 7,
7, 4, 0,
6, 2, 1,
1, 5, 6,
0, 4, 1,
1, 4, 5,
3, 2, 6,
6, 7, 3
};
int
sweet_geometry_cube (float scale,
unsigned int * count_indices, unsigned int ** mesh_indices,
unsigned int * count_vertices, float ** mesh_vertices)
{
int i;
*mesh_vertices = NULL;
*mesh_indices = NULL;
*count_indices = NB_INDICES;
*count_vertices = NB_VERTICES;
*mesh_vertices = malloc (NB_VERTICES * 3 * sizeof (float));
if (*mesh_vertices == NULL) { return 0; }
*mesh_indices = malloc (NB_INDICES * sizeof (unsigned int));
if (*mesh_indices == NULL) { return 0; }
for (i = 0; i < NB_VERTICES * 3; i++)
{
(*mesh_vertices)[i] = cube_vertices_v[i] * scale;
}
for (i = 0; i < NB_INDICES; i++)
{
(*mesh_indices)[i] = cube_indices_v[i];
}
return 6;
}

5
sweet_geometry.h
View File

@ -36,5 +36,10 @@ int sweet_geometry_icosphere (unsigned int nb_iterations, float scale,
unsigned int * count_indices, unsigned int ** mesh_indices,
unsigned int * count_vertices, float ** mesh_vertices);
int
sweet_geometry_cube (float scale,
unsigned int * count_indices, unsigned int ** mesh_indices,
unsigned int * count_vertices, float ** mesh_vertices);
#endif