public override int Compare(VertexKey a, VertexKey b) { return(Comparer.CombinedCompare( floatComparer, a.normal.x, a.normal.y, a.normal.z, a.uv.x, a.uv.y, b.normal.x, b.normal.y, b.normal.z, b.uv.x, b.uv.y)); }