Culling method and module for 3D graphics

摘要

A culling method and module is provided to generate a culling decision for efficient culling a back-face triangle of a 3D graphics. The culling module includes a comparison circuit and a culling decision circuit. The comparison circuit compares the coordinates of three vertices of each triangle and then outputs the comparison results to the culling decision circuit. The culling decision circuit then generates a decision result by looking up a predetermined lookup table according to the comparison results and a pre-determined coordinate orientation signal.