Premium
A 4D Ray Tracing
Author(s) -
Maurel Herve,
Duthen Yves,
Caubet René
Publication year - 1993
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/1467-8659.1230285
Subject(s) - ray tracing (physics) , computer science , computer graphics (images) , distributed ray tracing , sequence (biology) , animation , coherence (philosophical gambling strategy) , intersection (aeronautics) , springing , analyser , computer vision , artificial intelligence , algorithm , rendering (computer graphics) , optics , mathematics , physics , cartography , geography , statistics , biology , genetics , thermodynamics
We are going to present a survey of techniques using temporal coherence in between frames to render animation sequences with ray tracing. A new method using temporal coherence in the ray space (lightpath of rays) is proposed. The goal of this technique is to factorize intersection and illumination calculations over the frames of the sequence. An optical event springing out many times in the sequence is computed once. The method is based upon 4D intersection calculations between temporal rays and moving objects. At the end of this paper, we present measurements showing the number of rays we need not calculate with our solution. These results come from simulating the algorithm behavior through a graphic and statistic ray analyser tool.