基于梯形阴影映射技术的平截头体交汇算法  

Intersecting Frusta Algorithm Based on Trapezoidal Shadow Mapping

作　　者：董文[1] 谯石[1] 杨晓燕[2] 

机构地区：[1]西华师范大学计算机学院,南充637002 [2]三峡大学电气信息学院,宜昌443002

出　　处：《计算机与数字工程》2011年第5期126-128,148,共4页Computer & Digital Engineering

基　　金：西华师范大学科研启动基金(编号:05B062)资助

摘　　要：阴影映射是在三维计算机图形中加入阴影的过程,在三维动画中有广泛的应用,但该算法容易产生走样,使用一种基于梯形阴影映射的平截头体交汇算法,对阴影映射进行了反走样处理。实验表明,该方法对于阴影映射分辨率和它们之间平滑过渡的总体能够有很好的把握和控制,能够生成高质量的阴影。Shadow mapping is the process of cast the shadows on the 3D curved surfaces which is widely used in 3D animation,but it usually suffers from aliasing.we use an intersection of frusta method based on trapezoidal shadow mapping technique to dispose anti-aliasing issue.The experiment result proves that this approach has a good overall control of the shadow map resolution and its smooth transition;it can also create high-quality shadows.

关 键 词：阴影映射 梯形 反走样 平截头体 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]