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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:

期数:

2013年02期

页码:

52-56

栏目:

智能、算法、系统工程

出版日期:

1900-01-01

文章信息/Info

Title:

Research on Realizing Method of Soft Shadow Based on GPU

文章编号:

1673-629X（2013）02-0052-05

作者:

付燕丽; 刘循

四川大学 计算机学院

Author(s):

FU Yan-li; LIU Xun

关键词:

阴影图; 反走样; 图形处理单元; 大规模场景; 并行分割的阴影贴图; 差值阴影贴图

Keywords:

shadow mapping; anti-aliasing; GPU; large scale environment; PSSMs; VSM

文献标志码:

A

摘要:

阴影是虚拟环境中真实感的重要特征.由于并行分割的阴影贴图算法的通用性和效率,它对大规模复杂的虚拟环境中的实时阴影渲染起了重要作用.但是对于塔台仿真系统这样的大规模动态场景,锯齿现象依然存在,利用差值阴影贴图等方法,对其效果进行了改进,并利用GPU强大的浮点数运算能力和并行处理能力加速了阴影的实现,有效地保证了阴影的真实性和实时性.实验结果表明生成的阴影边缘柔和,抗锯齿效果好,有效地解决了偏离和光渗问题,达到了实时仿真的要求

Abstract:

The shadow is the important characteristics of reality in the virtual environment. Because of the universal and efficiency,parallel split shadow maps algorithm plays an important role to the real-time shadow rendering in the large scale and complicated virtual environ-ment. But to tower simulation system which is large-scale dynamic scene,alias is still happened,using such as variance shadow maps to improve its effect,and using the powerful floating-point operation ability and parallel processing ability of GPU to accelerate the realiza-tion of shadow,so it can effectively guarantee the authenticity and real-time of the shadow. The experimental results show that the shad-ow generated has soft edge,well anti-aliasing effect,and solving the problem of shadow biasing and light bleeding,achieving the require-ments of real-time simulation

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更新日期/Last Update: 1900-01-01