Collision mesh won't form until mesh is moved?

[firestorm713q]

I’m trying to use this(http://wiki.unity3d.com/index.php/MarchingSquares) script for a procedural 2d asteroid, and for whatever reason it creates the collision mesh, but won’t form it until after I’ve moved it. Doesn’t matter whether or not I move it in script or in the editor, but the collision mesh won’t form. I’m still trying to wrap my head around building meshes procedurally, but I can’t seem to figure out what I’m missing.

		// render
		// for the sake of simplicity we are rendering every frame.
		// obviously you should only render when the data of the cells has changed
		Mesh mesh, cmesh;
		MarchSquares(out mesh, out cmesh, ref cells, 0.5f);
		// update the render mesh
		mf = (MeshFilter) Testg.GetComponent(typeof(MeshFilter));
		mf.mesh.Clear();
		mf.mesh.vertices = mesh.vertices;
		mf.mesh.uv = mesh.uv;
		mf.mesh.triangles = mesh.triangles;
		mf.mesh.normals = mesh.normals;
		Destroy(mesh);
		// update the collision mesh
		MeshFilter cmf = (MeshFilter) TestRenderg.GetComponent(typeof(MeshFilter));
		cmf.mesh.Clear();
		cmf.mesh.vertices = cmesh.vertices;
		cmf.mesh.uv = cmesh.uv;
		cmf.mesh.triangles = cmesh.triangles;
		cmf.mesh.normals = cmesh.normals;
		Destroy(cmesh);
		mc = (MeshCollider) Testg.GetComponent(typeof(MeshCollider));
		if (mc != null)
			mc.sharedMesh = mf.mesh;
		
		Vector3 temp = Testg.transform.position;
		temp.y += 1;
		Testg.transform.position = temp;
	}
 
	public void FixedUpdate() {
		// render
		// for the sake of simplicity we are rendering every frame.
		// obviously you should only render when the data of the cells has changed
		Mesh mesh, cmesh;
		MarchSquares(out mesh, out cmesh, ref cells, 0.5f);
		// update the render mesh
		MeshFilter mf = (MeshFilter) Testg.GetComponent(typeof(MeshFilter));
		mf.mesh.Clear();
		mf.mesh.vertices = mesh.vertices;
		mf.mesh.uv = mesh.uv;
		mf.mesh.triangles = mesh.triangles;
		mf.mesh.normals = mesh.normals;
		Destroy(mesh);
		// update the collision mesh
		MeshFilter cmf = (MeshFilter) TestRenderg.GetComponent(typeof(MeshFilter));
		cmf.mesh.Clear();
		cmf.mesh.vertices = cmesh.vertices;
		cmf.mesh.uv = cmesh.uv;
		cmf.mesh.triangles = cmesh.triangles;
		cmf.mesh.normals = cmesh.normals;
		Destroy(cmesh);
		MeshCollider mc = (MeshCollider) Testg.GetComponent(typeof(MeshCollider));
		if (mc != null)
			mc.sharedMesh = mf.mesh;
	}

[firestorm713q]

A dirty fix is to just move it up a unit, then back down, but I’d rather just have it make the object and go…if someone provides a better solution, I’ll unmark this answer, but for now, this is my solution…

[sparkzbarca]

how do you know the collision mesh isn’t formed.

My guess is it is, most of the time though objects without rigidbodys are “asleep”
that is why they don’t collide right away.

If its because a collision doesnt happen at start do collider.awake() maybe or add a rigidbody.