应用于视锥体裁剪
http://www.lighthouse3d.com/tutorials/view-frustum-culling/clip-space-approach-extracting-the-planes/
http://www.lighthouse3d.com/tutorials/maths/plane/
标签:www,http,lighthouse3d,距离,平面,tutorials,点到,com From: https://www.cnblogs.com/DvsJ/p/16813959.html