三维场景动态模糊阴影算法实现

上海大学学报(自然科学版)

三维场景动态模糊阴影算法实现

缪小亮，周政春，万旺根

上海大学通信与信息工程学院，上海 200072

收稿日期:2006-06-12 修回日期:1900-01-01 出版日期:2007-04-30 发布日期:2007-04-30
通讯作者: 万旺根

Implementation of Dynamic Antialiased Shadow Algorithm in 3D Scene

MIAO Xiao-liang,ZHOU Zheng-chun,WAN Wang-gen

School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China

Received:2006-06-12 Revised:1900-01-01 Online:2007-04-30 Published:2007-04-30
Contact: WAN Wang-gen

摘要/Abstract

摘要： 针对shadowmap算法，论述其基本原理，从数学角度解释自阴影以及锯齿现象出现的原因，利用z偏移和增加深度信息精度来解决自阴影现象，提出一种多次采样的算法来平滑阴影，消除锯齿影响，并基于DirectX3D实现，通过测试证明算法的可行性.

关键词: shadowmap, 多次采样, 锯齿, 自阴影

Abstract: We study the algorithm of shadowmap and its basic principles. The cause of self shadow and aliasing are also explained mathematically. A multi-sampling algorithm to smooth shadow is presented, and aliasing reduced by increasing precision of depth information and making use of z bias. The algorithm is implemente d with DirectX3D. Experimental results show the feasibility of the algorithm.

Key words: aliasing, multi-sampling, self-shadow, shadowmap

中图分类号:

TP 391.9

缪小亮;周政春;万旺根. 三维场景动态模糊阴影算法实现[J]. 上海大学学报(自然科学版).

MIAO Xiao-liang;ZHOU Zheng-chun;WAN Wang-gen. Implementation of Dynamic Antialiased Shadow Algorithm in 3D Scene[J]. Journal of Shanghai University（Natural Science Edition）.

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