体层次迭代发射算法研究

Research of Hierarchical Iterative Shooting Algorithm for Volumetric Radiosity

介绍体层次迭代发射算法 ,它用于虚拟现实图形演示的体放射法 .基于体单元对光线的发射、吸收、漫射、反射和散射基础上的体放射法 ,适用于复杂景物的生成和演示 ,在真实感图形演示中具有重要地位 .本文首先介绍体放射法的主要技术细节 ,如光线计算 ,体放射方程 ,光线生成参数 ,接着说明体层次发射算法的机理 ,最后给出了本算法生成的实例 .同时对算法做了评估 .

This paper introduces the hierarchical iterative shooting algorithm, which has been used for volumetric radiosity in virtual reality rendering. Based on the emission, absorption, diffusion, reflection and scatteration of light by a voxel, it is suitable for generating and rendering realistic images of complex scenes. It plays an important role in virtual reality graphics. First of all, the main concept of volumetric radiosity was briefly introduced. This method contains calculation of intensity, radiosity equations and form factors. Secondly, the principle of the hierarchical iterative shooting algorithm for volumetric radiosity was introduced. Finally, an example and algorithm evaluation were given in this paper.