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An Efficient SAH-Based KD-Tree Construction Algorithm for Ray Tracing

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2 Author(s)
Liuzhou Wu ; Sch. of Comput. Sci. & Eng., South China Univ. of Technol., Guangzhou, China ; Zelin Chen

KD-Tree is an important accelerating structure for ray-tracing based realistic rendering. How to construct kd-tree efficiently is very crucial for ray tracing performance. In this paper, we present a fast construction algorithm. It is based on SAH cost estimation function and adopts a clever way to keep sorting order without sorting every time. Thus we reduce the complexity to O(NlogN), which is the asymptotic lower bound for building kd-trees.

Published in:
Computational Intelligence and Software Engineering, 2009. CiSE 2009. International Conference on

Date of Conference: 11-13 Dec. 2009

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