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ADDED: GenMeshCone() #1903

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raysan5 2021-08-08 11:29:24 +02:00
parent e6fe8169c2
commit 5e63cd3c97
3 changed files with 188 additions and 31 deletions
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55
src/models.c
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@ -2084,6 +2084,61 @@ Mesh GenMeshCylinder(float radius, float height, int slices)
return mesh;
}
// Generate cone/pyramid mesh
Mesh GenMeshCone(float radius, float height, int slices)
{
Mesh mesh = { 0 };
if (slices >= 3)
{
// Instance a cone that sits on the Z=0 plane using the given tessellation
// levels across the UV domain. Think of "slices" like a number of pizza
// slices, and "stacks" like a number of stacked rings.
// Height and radius are both 1.0, but they can easily be changed with par_shapes_scale
par_shapes_mesh *cone = par_shapes_create_cone(slices, 8);
par_shapes_scale(cone, radius, radius, height);
par_shapes_rotate(cone, -PI/2.0f, (float[]){ 1, 0, 0 });
par_shapes_rotate(cone, PI/2.0f, (float[]){ 0, 1, 0 });
// Generate an orientable disk shape (bottom cap)
par_shapes_mesh *capBottom = par_shapes_create_disk(radius, slices, (float[]){ 0, 0, 0 }, (float[]){ 0, 0, -1 });
capBottom->tcoords = PAR_MALLOC(float, 2*capBottom->npoints);
for (int i = 0; i < 2*capBottom->npoints; i++) capBottom->tcoords[i] = 0.95f;
par_shapes_rotate(capBottom, PI/2.0f, (float[]){ 1, 0, 0 });
par_shapes_merge_and_free(cone, capBottom);
mesh.vertices = (float *)RL_MALLOC(cone->ntriangles*3*3*sizeof(float));
mesh.texcoords = (float *)RL_MALLOC(cone->ntriangles*3*2*sizeof(float));
mesh.normals = (float *)RL_MALLOC(cone->ntriangles*3*3*sizeof(float));
mesh.vertexCount = cone->ntriangles*3;
mesh.triangleCount = cone->ntriangles;
for (int k = 0; k < mesh.vertexCount; k++)
{
mesh.vertices[k*3] = cone->points[cone->triangles[k]*3];
mesh.vertices[k*3 + 1] = cone->points[cone->triangles[k]*3 + 1];
mesh.vertices[k*3 + 2] = cone->points[cone->triangles[k]*3 + 2];
mesh.normals[k*3] = cone->normals[cone->triangles[k]*3];
mesh.normals[k*3 + 1] = cone->normals[cone->triangles[k]*3 + 1];
mesh.normals[k*3 + 2] = cone->normals[cone->triangles[k]*3 + 2];
mesh.texcoords[k*2] = cone->tcoords[cone->triangles[k]*2];
mesh.texcoords[k*2 + 1] = cone->tcoords[cone->triangles[k]*2 + 1];
}
par_shapes_free_mesh(cone);
// Upload vertex data to GPU (static mesh)
UploadMesh(&mesh, false);
}
else TRACELOG(LOG_WARNING, "MESH: Failed to generate mesh: cone");
return mesh;
}
// Generate torus mesh
Mesh GenMeshTorus(float radius, float size, int radSeg, int sides)
{