摘要
软阴影锥(soft shadow volumes)算法是多媒体领域中用于快速生成高质量阴影的最佳算法之一.然而,在区域光源情形下,精致软阴影的计算仍然是计算机图形处理过程中的难题之一.在对不同的软阴影算法分析研究的基础上,提出了一种梯形结构的软阴影锥渲染算法,对于每个阴影象素仅需用一束参考光线来测试.通过不同的阴影场景的实验表明,该方法能比较快速地生成非常光滑且无噪音的软阴影图像.
One of the best choices of multimedia for fast, high quality shadows is the shadow volume algorithm. However, the calculation of detailed soft shadows is one of the most difficult challenges in computer graphics in the case of area light source. Based on the analysis of different soft shadow algorithm, a trapeziums-based algorithm for rendering soft shadows by using a single shadow ray for each shadow pixel is presented. The demonstrated results for various scenes prove that this method produces very smooth and artifact-free soft shadow image while executing one order of magnitude faster.
出处
《浙江大学学报（理学版）》
CAS
CSCD
北大核心
2007年第6期628-632,共5页
Journal of Zhejiang University（Science Edition）
基金
浙江省公安厅科研项目(No.2007330029235)
浙江公安应用技术研究所资助
关键词
阴影算法
可视性测试
软阴影锥
shadow algorithms
visibility determination
soft shadow volume
