Split mesh faces C#

Questions & Answers
1

How can i split mesh faces without losing faces materials assignments. The code i used is here (the other variables you can’t see are declared in the main code), it works but it loses materials assignments and gets the final mesh with only a material:

void defragMesh()
	{
		myMesh = new Mesh();
		
		myMesh.vertices = startMesh.vertices;
		myMesh.triangles = startMesh.triangles;
		myMesh.uv = startMesh.uv;
		myMesh.normals = startMesh.normals;
		
		newVertices = new Vector3[myMesh.triangles.Length];
		int[] newTris = new int[myMesh.triangles.Length];
		Vector2[] newUV = new Vector2[myMesh.triangles.Length];
		Vector3[] newNormals = new Vector3[myMesh.triangles.Length];
		
		for(int i = 0; i < myMesh.triangles.Length; i++)
		{
			newVertices _= myMesh.vertices[myMesh.triangles*];*_

newUV = myMesh.uv[myMesh.triangles*];*
newNormals = myMesh.normals[myMesh.triangles*];*
_ newTris = i;
* }*_

* myMesh.vertices = newVertices;*
* myMesh.triangles = newTris;*
* myMesh.uv = newUV;*
* myMesh.normals = newNormals;*

* normals = new Vector3[myMesh.triangles.Length / 3];*
* int index = 0;*
* for(int i = 0; i < normals.Length; i++)*
* {*
* Vector3 v = newVertices[index++];*
_ normals = Vector3.Cross(newVertices[index++] - v, newVertices[index++] - v).normalized;
* }*_

* }*

2

If you use multiple materials you will need to use SetTriangles and GetTriangles to set the triangles for each of the submeshes. Using triangles directly removes the sub meshes.