Bug Mesh collider error with Line renderer

Hello,

I have a file with a lot of coordinates. In my project I read this file and connect some points with a line renderer.
I generate a mesh collider on all my line renderers because I need to do a raycast with them. When I want to pass the generated mesh to the mesh collider component I can have this error :

Code (CSharp):

1. [Physics.PhysX] TriangleMesh::loadFromDesc: desc.isValid() failed!
2. UnityEngine.MeshCollider:set_sharedMesh(Mesh)

I generated 1520 lines and I got this error twice.
With a light file I havn't any error.
This is my code, maybe it can help :

Code (CSharp):

1.     Mesh lineMesh = new Mesh();
2.     MeshCollider lineCollider = line.AddComponent<MeshCollider>();
3.     lineMesh.Clear();
4.     lineRenderer.BakeMesh(lineMesh, Camera.main, false);
5.     lineMesh.Optimize();
6.     lineMesh.RecalculateNormals();
7.     lineCollider.sharedMesh = lineMesh;

Thanks you to help me to fix that !

 

When I change the boolean to true in the BakeMesh method, I have a lot of other errors.

Code (CSharp):

1. lineRenderer.BakeMesh(lineMesh, Camera.main, true);

EDIT : The problems come from the bounding box. His generation is weird or I don't understand something. This is an example of my data and errors.



My bounding box min and max don't always match with my lineRenderer points.
Also I had this line after the BakeMesh method.

Code (CSharp):

1. lineMesh.RecalculateBounds();

 

I solved it ! (But I didn't found the tool to put the thread on Resolved )

My problem was when I get the point positions of my line, sometimes the start and the end was the same point, so I tryed to draw a point and add a mesh collider on it.

I fixed it with this way :

Code (CSharp):

1. Mesh lineMesh = new Mesh();
2. MeshCollider lineCollider = line.AddComponent<MeshCollider>();
3. lineMesh.Clear();
4. lineRenderer.Simplify(0.1f);
5. lineRenderer.BakeMesh(lineMesh, Camera.main, false);
6. lineMesh.Optimize();
7. lineMesh.RecalculateNormals();
8. lineMesh.RecalculateBounds();
9. Vector3 boundsSize = lineMesh.bounds.size;
10. int count = 0;
11. if (boundsSize.x == 0)
12.     count++;
13. if (boundsSize.y == 0)
14.     count++;
15. if (boundsSize.z == 0)
16.     count++;
17. if (count < 1)
18. {
19.     lineCollider.sharedMesh = lineMesh;
20. }
21. else
22. {
23.      DestroyImmediate(line); //line is my gameobject
24. }

 

Hi, With my project, I'm just getting a rectangle spawned instead of a mesh collider that follows the line. Do you know why this is happening?

 

Check to see if mesh collider is set to be convex (first parameter in inspector). If it's set 'convex' then that could be your issue. Try setting that to false.