NDLI: Fast BVH construction and refit for ray tracing of dynamic scenes

Content Provider	Springer Nature Link
Author	Yin, Mingqiang Li, Shiqi
Copyright Year	2013
Abstract	As the complexity of virtual environments increases, it becomes a critical issue to ray tracing of dynamic scenes interactively. In this paper, we propose an effective method to address this issue. Firstly, we improve the Surface Area Heuristics (SAH) based bounding volume hierarchies (BVHs) construction algorithm and present a sub-interval search criterion for predicting the optimal split plane position. Compared with the standard SAH approach, our algorithm is much faster but has a little quality degradation. Secondly, we present two new BVH refitting operations, which could run fast and obtain considerable quality of BVHs. The two operations are general and applicable to complex and dynamic scenes including a wide range of deformation. Lastly we use multithread to handle the dynamic scenes during animation, one thread for BVHs rebuilding asynchronously, the others for BVHs refitting and ray tracing. The results of this experiment show that our method is effective. Compared with the previous works, it obtains higher and smoother frame rate.
Starting Page	1823
Ending Page	1839
Page Count	17
File Format	PDF
ISSN	13807501
Journal	Multimedia Tools and Applications
Volume Number	72
Issue Number	2
e-ISSN	15737721
Language	English
Publisher	Springer US
Publisher Date	2013-05-03
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Animation Ray tracing BVHs Time complexity Dynamic scenes Multimedia Information Systems Computer Communication Networks Data Structures, Cryptology and Information Theory Special Purpose and Application-Based Systems
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software Media Technology

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