资 源 简 介
This sample demonstrates two ways to take advantage of early Z rejection. When rendering, if the hardware detects that after performing vertex shading a fragment will fail the depth test, it can avoid the cost of executing the pixel shader and reject the fragment. To best take advantage of this feature, it is necessary to maximize the number of fragments that can be rejected because of depth testing. This sample demonstrates two ways of doing this: front to back rendering and z pre-pass.
Front to back rendering requires sorting opaque geometry based on distance from the camera and rendering the geometry closest to the camera first. This rendering order will maximize depth test failure without additional D3D API calls.
For Z pre-pass, all opaque geometry is rendered in two passes. The first pass populates the Z buffer with
