Binary space partitioning visibility tree for polygonal and environment light rendering
Binary space partitioning visibility tree for polygonal and environment light rendering
复制标题
用于多边形和环境光渲染的二元空间分区可见性树
DOI:
10.1007/s00371-021-02181-8
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Iwasaki Kei
中科院分区:
文献类型:
--
作者:
Okuno Hiroki;Iwasaki Kei
In this paper, we present a geometric approach to render shadows for physically based materials under polygonal light sources. Direct illumination calculation from a polygonal light source involves the triple product integral of the lighting, the bidirectional reflectance distribution function (BRDF), and the visibility function over the polygonal domain, which is computation intensive. To achieve real-time performance, work on polygonal light shading exploits analytical solutions of boundary integrals along the edges of the polygonal light at the cost of lacking shadowing effects. We introduce a hierarchical representation for the precomputed visibility function to retain the merits of closed-form solutions for boundary integrals. Our method subdivides the polygonal light into a set of polygons visible from a point to be shaded. Experimental results show that our method can render complex shadows with a GGX microfacet BRDF from polygonal light sources at interactive frame rates. In addition, our visibility representation can be easily incorporated into environment lighting.
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DOI:
10.1145/3015459
发表时间:
2018
期刊:
ACM Transactions on Graphics (TOG)
影响因子:
--
作者:
Laurent Belcour;Guofu Xie;C. Hery;Mark Meyer;Wojciech Jarosz;D. Nowrouzezahrai
通讯作者:
D. Nowrouzezahrai
DOI:
--
发表时间:
1995
期刊:
International Conference on Computer Graphics and Interactive Techniques
影响因子:
--
作者:
James Arvo
通讯作者:
James Arvo
DOI:
10.1145/2797136
发表时间:
2015
期刊:
ACM Transactions on Graphics (TOG)
影响因子:
--
作者:
C. Soler;Mahdi M. Bagher;D. Nowrouzezahrai
通讯作者:
D. Nowrouzezahrai
影响因子:
6.2
作者:
Lifan Wu;Guangyan Cai;Shuang Zhao;R. Ramamoorthi
通讯作者:
R. Ramamoorthi
影响因子:
2.5
作者:
D. Nowrouzezahrai;Ilya Baran;Kenny Mitchell;Wojciech Jarosz
通讯作者:
Wojciech Jarosz