Generate mesh.triangles Array Programmatically

Questions & Answers
1

I Have a mesh which I want to break it it smaller pieces.

I am doing that buy creating new submeshes which each contains X(random) triangles like this:

…

   int loop_vertices = 3 + (X- 1);
   int[] indices = M.GetTriangles(submesh);
   for (int i = 0; i < indices.Length; i += loop_vertices)
   {
         Vector3[] newVerts = new Vector3[loop_vertices];
         Vector3[] newNormals = new Vector3[loop_vertices];
         Vector2[] newUvs = new Vector2[loop_vertices];
         for (int n = 0; n < loop_vertices; n++)
         {
               int index = indices[i + n];
               newVerts[n] = verts[index];
               newUvs[n] = uvs[index];
               newNormals[n] = normals[index];
          }
          mesh.triangles=????????
    }

…

How can i create the mesh.triangles array programmatically?

2

List vertices;
List triangles;
Vector2 uvs;

//fill the above correctly, then
Mesh mesh = new Mesh();
mesh.SetVertices(vertices);
mesh.SetTriangles(triangles.ToArray(), 0);
mesh.RecalculateNormals();
mesh.uv = uvs;