diff options
Diffstat (limited to 'src/models.c')
| -rw-r--r-- | src/models.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/models.c b/src/models.c index bce9c8d8..2b6f9a58 100644 --- a/src/models.c +++ b/src/models.c @@ -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) { |
