Directx11 tutorial (62) tessellation (4)

Now let's look at the detail of the Quadrilateral subdivision when the quadrilateral is different from the Tess factor, which is the subdivision of the Tess factor1-8. When the Tess factor is an even number, the subdivided triangle is symmetric. When the odd number is, there is only one diagonal line, and the subdivided triangle is asymmetrical. Compared with the triangle subdivision, The quadrilateral is relatively simple, but the edge subdivision and the Interior surround quadrilateral are the same as those of the triangle. When the odd number is, the center is a small quadrilateral, if an even number is used, the center is a vertex.