Add sweet_geometry_cube

sweet_geometry.c

@@ -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;
+}
 

sweet_geometry.h

@@ -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