体射线追踪

L. Sobierajski, A. Kaufman
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引用次数: 107

摘要

本文提出了一种有效的光线追踪方法,用于包含几何和体积数据的场景。该方法建立了一个全局光照方程,能够在单幅图像中捕获真实的反射和实际的体绘制。在该方法中,射线与物体的相交计算得到标准的相交点,以及相交段。为了提高精度和效率,在进行任何相交计算之前,沿着一条射线的所有物体都是根据距离和相交分类进行排序的。然后将相交结果传递给一个阴影,该阴影评估由照明模型定义的强度方程,以确定最终的像素值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Volumetric ray tracing
This paper presents an eficient ray tracing method for scenes containing volumetric as well as geometric data. A global illumination equation is developed for this method, which is able to capture in a single image both realistic eaects and practical volume rendering. In this method, ray-object intersection calculations result in standard intersection points, as well as intersection segments. For accuracy and eflciency, all objects along a ray are sorted according to distance and intersection classification before any intersection calculations are pelformed. The intersection results are then passed to a shaden which evaluates the intensity equation defined by the illumination model to determine the final pixel value.
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