How to find all overlaps with a PxTriangleMeshGeometry?

[repulsio]

PxSceneQuerySystemBase.overlap() doesn't work for PxTriangleMeshGeometry. I just need a simple solution for getting all overlaps with a PxTriangleMeshGeometry. Can someone please help?

[vreutskyy]

Hi @repulsio
Have you had a look at PxMeshQuery API?
https://nvidia-omniverse.github.io/PhysX/physx/5.6.1/docs/GeometryQueries.html#pxmeshquery

[repulsio]

Thank you for the tip, @vreutskyy!

I did try PxMeshOverlapUtil.findOverlap(), which calls PxMeshQuery.findOverlapTriangleMesh(). I believe it's on the right track, since the moment a sphere overlaps with the PxTriangleMeshGeometry, there's a memory access out of bounds error

I use @fabmax 's port of PhysX to JavaScript, so I'm unsure if this memory error is on the C++ side with PhysX or the JS side with physx-js-webidl

Since my mesh shape is a simple box shape, my workaround is to use a convex hull instead of a triangle mesh

Below is a screenshot of the memory access out of bounds error the instant a sphere overlaps with a box-shaped PxTriangleMeshGeometry:

[vreutskyy]

It's hard to say, of course, but I'd first check the data you pass to this function, like the mesh arrays, the result buffer. The function itself should be tested rather well by now, so it's unlikely it crashes because of a bug there. Still possible though :)

[repulsio]

Thank you so much for your idea, @vreutskyy! I'll investigate this more :)