/// <summary>
/// Always prefer this split over the tesellation because it is faster and there is
/// no need to allocate collection. This only works for quads/rectanges.
/// </summary>
/// <param name="t1">The first triangle.</param>
/// <param name="t2">The second triangle.</param>
public void Split(out Triangle3d t1, out Triangle3d t2)
{
t1 = new Triangle3d(A, B, C);
t2 = new Triangle3d(A, C, D);
}