Warp renderer with cylinder

[cadop]

I am trying to use warp renderer with a cylinder, and it isn't happy. I made it in omniverse (create-mesh-cylinder). The error is:

lib\site-packages\warp\render\render_usd.py", line 528, in render_mesh
    idxs = np.array(indices).reshape(-1, 3)
ValueError: cannot reshape array of size 320 into shape (3)

Is there some step I am missing?

I am using this example https://github.com/NVIDIA/warp/blob/main/examples/example_mesh.py

[mmacklin]

Hi @cadop , I am guessing it's because the cylinder is a quad mesh, but render_mesh assumes a triangle mesh.

You would need to triangulate it first, take a look at the code here on how to do it: https://github.com/NVIDIA/warp/blob/main/warp/tests/test_mesh_query_point.py#L248

Cheers,
Miles

[cadop]

Thanks! solved it

[cadop]

What do you think about adding this as a built-in function? Maybe here:

warp/warp/sim/model.py

Line 135 in 1535cde

def __init__(self, vertices: List[Vec3], indices: List[int], compute_inertia=True, is_solid=True):

And have a default flag with triangles = True, but if its false, runs the triangulate method.