GPU Based Real-time Shadow Research

Authors:
Yang Xiao;Jin Yicheng;Yin Yong;Wu Zhuoyu
Affiliations:
Dalian Maritime University, China;Dalian Maritime University, China;Dalian Maritime University, China;Dalian Maritime University, China
Venue:
CGIV '06 Proceedings of the International Conference on Computer Graphics, Imaging and Visualisation
Year:
2006

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A new application for real-time shadow and sun's position in virtual environment

IVIC'11 Proceedings of the Second international conference on Visual informatics: sustaining research and innovations - Volume Part I

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Abstract

Shadow can strengthen the reality of 3D virtual scene and provide important visual information for the objects' spacial relationship in the scene. This paper presents a GPU based method for all the process of shadow volume algorithm. It can achieve greater shadow performance in Ship-handling simulator than previous methods by migrating the silhouette extraction and shadow volume rending to GPU, and applying a series of techniques for culling, clipping, and simplifying shadow volume geometry. We make a series of optimization for the visual system of the ship-handling simulator such as limit the range of illumination, the alternation of z-pass and z-fail algorithm, using the ultra shadow technology and two sided stencil buffer to accelerate the rending of shadow.