自然现象的可视化是计算机图形学和虚拟现实领域的重要研究内容。对传统光线投射算法分析的基础上进行改进,提出基于球壳体的光线投射算法。将GPU运用于球壳体数据场的体绘制,设计了基于球壳体数据场的顶点着色程序和像素着色程序。同时,对台风源数据格式进行解析,生成了用于台风可视化的体数据,采用提出的算法实现了台风云层和因子的可视化。实验结果表明,本文基于GPU的球壳体光线投射算法在球体表面较好地实现了实时台风可视化效果。

The visualization of natural phenomena visualization is an important research area in computer graphics and virtual reality.In this paper we analyze and imprave the traditional ray casting algorithm by proposing a graphics processing units(GPU)based spherical shell ray casting algorithm. GPU are used in the spherical shell data field volume rendering, and spherical shell.Vertex shader and pixel shader programs for spherical shell data field rendering are designed. The format of the typhoon source data is analyzed and the typhoon volume data to be visualized is generated. The visualization of typhoon clouds and factors are implemented by using the proposed algorithm. Experiment results show that a good real-time visualization of a typhoon is obtained by the GPU-based spherical shell ray casting algorithm.