Real-time soft shadow rendering of dynamic scenes using circle splats approximation

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Status	已發表Published
	Real-time soft shadow rendering of dynamic scenes using circle splats approximation
	Lu W.1; Liu X.1; Xue G.1; Wu E.1
	2007-12-01
Source Publication	Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics
ISSN	10039775
Volume	19 Issue:12 Pages:1587-1592
Abstract	We present a real-time rendering method for soft shadows in dynamic scenes by approximating the model surface using circle splats. The occlusion of each of the splats can be approximated using an elliptical occlusion field which is sampled in the pre-computation process. In each sample point, an occlusion cube-map of single ellipse represented by spherical harmonic coefficients is got and we transferred them to logarithm using spherical harmonic logarithm algorithm. During the rendering, we first got the log SH coefficients of each circle splat according to the its normal, radius and the distance between the splat and the receiving point, which is precomputed. We accumulate the total occlusion coefficients in log space and compute the final SH coefficients using spherical harmonic exponentiation algorithm. The algorithm combines the circle splats approximating method and spherical harmonic exponentiation algorithm. It is so flexible that it can easily render soft shadow generated by both soft objects and dynamic solid objects.
Keyword	Dynamic scene Precomputed radiance transfer Soft shadow
URL	View the original
Language	英語English
Fulltext Access	View Full-Text via Scopus
Document Type	Journal article
Collection	University of Macau
Affiliation	1.Institute of Software Chinese Academy of Sciences 2.Universidade de Macau 3.University of Chinese Academy of Sciences
Recommended Citation GB/T 7714	Lu W.,Liu X.,Xue G.,et al. Real-time soft shadow rendering of dynamic scenes using circle splats approximation[J]. Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics, 2007, 19(12), 1587-1592.
APA	Lu W.., Liu X.., Xue G.., & Wu E. (2007). Real-time soft shadow rendering of dynamic scenes using circle splats approximation. Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics, 19(12), 1587-1592.
MLA	Lu W.,et al."Real-time soft shadow rendering of dynamic scenes using circle splats approximation".Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics 19.12(2007):1587-1592.

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