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2012 International Conference on Computational Intelligence and Software Engineering (CiSE 2012)(E-BOOK)

Wuhan,China,2012-12-142012-12-162012

ISBN: 978-1-61896-036-8 Scientific Research Publishing

E-Book 275pp Pub. Date: December 2012

Category: Computer Science & Communications

Price: $100

Title: Interactive Refraction Using Image-Based Approximation
Source: 2012 International Conference on Computational Intelligence and Software Engineering (CiSE 2012)(E-BOOK) (pp 96-99)
Author(s): Yang Liu, School of Software,Shanghai Jiao Tong University,Shanghai, China
Qian Yu, School of Software,Shanghai Jiao Tong University,Shanghai, China
Shuangjiu Xiao, School of Software,Shanghai Jiao Tong University,Shanghai, China
Abstract: Classical ray tracing techniques can correctly simulate refraction but with rather low frame rate. Instead recent imagebased methods can interactively approximate two-layer refraction. But previous image-based ones are either limited by the geometry topology or require extra efforts to do rayintersection calculations. Our image-based approach removes the geometry topology limits and better optimizes the rayintersection procedure by narrowing the search space. The method requires only two passes on a GPU. The first pass renders back-facing depth and normal information to textures. The second pass calculates the intersection point between refracted rays with the back-facing part using binary search method in 2D depth texture space. The final result demonstrates the effectiveness of our algorithm by interactive refractions through objects composed of several hundred thousand polygons.
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