Dynamic Mesh Collider - Help Wanted

Unity Engine
1

Hello, I’ve scoured the internet for answers but could not find any answers to the issue I’m having.

Basically we are developing a game where we will need to create simple primitive convex colliders at runtime.
Generating the mesh is fine, but I’m having an issue with the mesh colliders. I have a simple obtuse box here that will pass through objects on one side.

Image:
http://img207.imageshack.us/img207/9060/25312994.png

There is a normal box with a box Collider under my brown Mesh Collider.

Edit:
I have just discovered that this only happens when the colliders are lined up on the Z axis, if I scale it to be larger or smaller on the Z it collides fine.

Is this a common problem with mesh colliders? Is it possible my mesh is NOT convex?

Just a point in the right direction would be amazing, thanks.

EditEdit:
Just realised the mesh creation tool PolygonTool is creating and setting vertices for each face, this could be the problem but any further information is appreciated.

EditEditEdit:
Well I fixed the code so that a box would have 8 vertices and changed the indices/triangles to reference the new verts. No change in the collision problem.

Answer:
It seems the triangulation from the PolygonTool I purchased works for most situations, but not for this one. I reverted back to my own triangulation and everything seems to be fine.

2

Damn, I didnt even get a chance to answer… glad to be of help… lol

3

To add an input: ensure that your mesh is always convex and marked as such. updating non-convex mesh colliders causes all affected collision trees to rebuild which is a major thing (if you move such an object with updating non-convex mesh collider you can bring down a core i7 core with the ‘right’ environment, just to give you an idea of the impact)