Setting face colors in mesh shader

gistfile1.txt

        //int N = 256;
        //Texture2D tex = new Texture2D(N, N, TextureFormat.RFloat, false);
        //float[] buffer = new float[N * N];
        //foreach (int tid in startMesh.TriangleIndices()) {
        //    int v = tid / N;
        //    int u = tid % N;

        //    int n = 0;
        //    Vector3d c = startMesh.GetTriCentroid(tid);
        //    if (c.x > startMesh.CachedBounds.Center.x)
        //        n++;
        //    if (c.y > startMesh.CachedBounds.Center.y)
        //        n++;
        //    if (c.z > startMesh.CachedBounds.Center.z)
        //        n++;
        //    Color col = new Color((float)n, 0, 0, 1);
        //    buffer[tid] = (float)n;
        //}
        //tex.LoadRawTextureData(FloatToByte(buffer));
        //tex.Apply();
        //wireframeShader.SetTexture("_FaceIndexMap", tex);