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warp.mesh_get_point#

warp.mesh_get_point(id: uint64, index: int32) → vec3f#

  • Kernel

Look up the position of a face’s vertex in the warp.Mesh.

index is a face-vertex index: a position in the mesh’s index buffer, in [0, 3 * number_of_faces), where positions 3*f, 3*f + 1, 3*f + 2 belong to face f. Returns the position of the vertex referenced there, i.e. points[indices[index]], in the mesh’s local space. Use mesh_get_index() to obtain that vertex index itself.

Parameters:

  • id – The mesh identifier

  • index – A face-vertex index, in [0, 3 * number_of_faces)

Returns:

The referenced vertex’s position, in the mesh’s local space.

Example

@wp.kernel
def slot0(mesh_id: wp.uint64, out: wp.array[wp.vec3]):
    out[0] = wp.mesh_get_point(mesh_id, 0)

points = wp.array([[0,0,0],[1,0,0],[1,1,0],[0,1,0],[0,0,1],[1,0,1],[1,1,1],[0,1,1]], dtype=wp.vec3)
indices = wp.array([0,3,2, 0,2,1,  4,5,6, 4,6,7,  0,1,5, 0,5,4,
                    2,3,7, 2,7,6,  0,4,7, 0,7,3,  1,2,6, 1,6,5], dtype=wp.int32)
mesh = wp.Mesh(points=points, indices=indices)

out = wp.zeros(1, dtype=wp.vec3)
wp.launch(slot0, dim=1, inputs=[mesh.id], outputs=[out])
print(out.numpy()[0])

[0. 0. 0.]