New techniques for ray tracing procedurally defined objects

J. Kajiya
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引用次数: 40

Abstract

We present new algorithms for efficient ray tracing of three procedurally defined objects: fractal surfaces, prisms, and surfaces of revolution. The fractal surface algorithm performs recursive subdivision adaptively. Subsurfaces which cannot intersect a given ray are culled from further consideration. The prism algorithm transforms the three dimensional ray-surface intersection problem into a two dimensional ray-curve intersection problem, which is solved by the method of strip trees. The surface of revolution algorithm transforms the three dimensional ray-surface intersection problem into a two dimensional curve-curve intersection problem, which again is solved by strip trees.
光线追踪程序定义对象的新技术
我们提出了三种程序定义对象的有效光线跟踪的新算法:分形表面,棱镜和旋转表面。分形曲面算法进行自适应递归细分。不能与给定射线相交的子表面从进一步的考虑中剔除。棱镜算法将三维射线与曲面的相交问题转化为二维射线与曲线的相交问题,并采用条形树的方法进行求解。旋转曲面算法将三维射线与曲面的相交问题转化为二维曲线与曲线的相交问题,再用条形树求解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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