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大规模场景中实时阴影的绘制 被引量：2

Real-time shadow rendering in large-scale scene
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摘要 为解决大规模场景中绘制实时阴影的问题,提出优化的阴影体算法.通过访问场景模型的最简单LOD,获得轮廓边缘的检测数据.采用删除面内边的方法有效提高轮廓边缘的检测效率.根据模型的位置,选用基于CPU的Z-Pass方法或基于顶点着色器的Z-Fail方法渲染阴影.优化算法在航海模拟器大规模场景的应用表明,利用该算法绘制的阴影效果满足实时性和真实感的要求. An optimized shadow volume algorithm was developed to render shadow in large-scale scene. Detection data was obtained by accessing the simplest LOD to determine silhouette edge. Redundant internal edge was removed to improve detection efficiency. Shadows were rendered using CPU based Z-pass algorithm or Z-fail algorithm within vertex shader according to model＇ s position. Tests on large-scale scene of the marine simulator show that the proposed algorithm can meet the requirements of real-time and reality for shadow rendering.
作者 任鸿翔 尹勇 金一丞
机构地区 大连海事大学航海学院
出处 《大连海事大学学报》 EI CAS CSCD 北大核心 2008年第1期58-60,共3页 Journal of Dalian Maritime University
基金 国家"九七三"计划资助项目(2002CB312103)
关键词 大规模场景 实时阴影绘制 阴影体算法 large-scale scene real-time shadow rendering shadow volume algorithm
分类号 TP391.41 [自动化与计算机技术—计算机应用技术]
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参考文献10

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  • 2CROW F C. Shadow algorithms for computer graphics[J ]. Computer Graphics, 1977, 11 (2): 242-248.
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二级参考文献11

  • 1Wanger L. The effect of shadow quality on the perception of spatial relationships in computer generated imagery[J]. Computer Graphics, 1992, 25(2):39-42.
  • 2Crow F. Shadow algorithms for computer graphics[J]. Computer Graphics, 1977, 11 (3) : 242-248.
  • 3Heidmann T. Real shadows, real time[J]. Iris Universe, 1991 (18): 23-31.
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  • 8Lokovic T, Veach E. Deep shadow maps[A]. Proceeding of SIGGRAPH 2000 [C]. Los Angeles: ACM SIGGRAPH, 2000. 385-392.
  • 9Mark W T, Glanville R, Akeley K, et al. Cg: A system for programming graphics hardware in a C-like Language[J]. ACM Transactions on Graphics, 2003, 22(3):896-907.
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共引文献7

同被引文献21

引证文献2

二级引证文献4

大连海事大学学报
2008年 第1期

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