Get Mesh from physicsShape

Unity Engine
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1

Hi there,

I’m looking into possible solutions for constructing a navmesh in DOTS. I think it will be possible if I can translate a RigidBody/PhysicsCollider with meshcollider to UnityEngine.Mesh. Is this possible? If so, how can it be done?

Regards

2

There is a CreateRenderMeshFromCollider function in SceneCreationSystem.cs which hijacks one of the DebugDraw functions. It’s not fast but it might suit your needs.

3

Thanks, that’s good to know. What I ended up doing was to collect all vertices in the GetLeaves() method. Its inconvenient but works. Why don’t you expose the internal mesh of mesh colliders?

4

By navmesh you mean your own navmesh implementation or Unity’s?

In either case going through Unity.Physics is really doing this the hard way. You bake physics colliders from a source, just use that source. Or in the case of box/sphere/capsule just use the matching primitive mesh.

5

I’m using unity’s implementation. I’ve already got it sort of figured out for baking from colliders. The advantage compared to using the rendermesh, is that I can have complex render meshes but use simple colliders for navigation. Besides, my movement is based on physics so it makes sense to use the colliders for this.