POV-Ray : Newsgroups : povray.documentation.inbuilt : SOR documentation : Re: SOR documentation Server Time
22 Oct 2025 07:11:40 EDT (-0400)
  Re: SOR documentation  
From: Bald Eagle
Date: 21 Oct 2025 14:05:00
Message: <web.68f7cafa251da1bc438b893125979125@news.povray.org>
2025 paper, if someone can access the full article.

https://www.researchgate.net/publication/3904359_Ray_tracing_surfaces_of_revolution_An_old_problem_with_a_new_perspecti
ve

Ray tracing surfaces of revolution: An old problem with a new perspective
February 2001Proceedings of Computer Graphics International Conference, CGI

Abstract
We present a new subdivision scheme that is shown to improve the performance of
ray tracing surfaces of revolution over Kajiya's (1983) classical work. This is
based on a monotonic interval partitioning of a generatrix of a surface of
revolution. The algorithm has a search complexity upper bound of O(log(m n)) for
m monotonic intervals and n subdivisions for each interval and runs up to three
times faster on large scenes. This method also suggests a novel hybrid bounding
volume scheme that reduces this number of intersection tests between a ray and
the actual object surface


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