摘要: http://www.cnblogs.com/graphics/archive/2009/10/13/1582773.html参考上面,但推导时,只用两点不行吧?推导见下图: 阅读全文
posted @ 2015-01-12 20:21 dust_fly 阅读(751) 评论(0) 推荐(0)