Light Space Partitioned Shadow Maps

Bin TANG  Jianxin LUO  Guiqiang NI  Weiwei DUAN  Yi GAO  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E100-D   No.1   pp.234-237
Publication Date: 2017/01/01
Publicized: 2016/10/04
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2016EDL8171
Type of Manuscript: LETTER
Category: Computer Graphics
Keyword: 
projection plane,  dual-directional partitioning,  light frusta,  

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Summary: 
This letter proposes a Light Space Partitioned Shadow Maps (LSPSMs) algorithm which implements shadow rendering based on a novel partitioning scheme in light space. In stead of splitting the view frustum like traditional Z-partitioning methods, we split partitions from the projection of refined view frustum in light space. The partitioning scheme is performed dual-directionally while limiting the wasted space. Partitions are created in dynamic number corresponding to the light and view directions. Experiments demonstrate that high quality shadows can be rendered in high efficiency with our algorithm.