public override string ToString()
{
return string.Format( "IndexSet {0} VertexSet {1} VertIndices({2},{3},{4}) SharedVerts({5},{6},{7}) Normal({8},{9},{10},{11}) LightFacing {12})",
indexSet, vertexSet, vertIndex[ 0 ], vertIndex[ 1 ], vertIndex[ 2 ], sharedVertIndex[ 0 ], sharedVertIndex[ 1 ], sharedVertIndex[ 2 ],
normal.x, normal.y, normal.z, normal.w, lightFacing );
}