基于空间分割的三维不规则数据场的体绘制算法  

VOLUME RENDERING OF IRREGULAR DATA FIELD BASED ON SPACE SEGMENTATION

作　　者：董峰[1] 蔡文立[1] 石教英[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室

出　　处：《计算机辅助设计与图形学学报》1997年第3期241-248,共8页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金;浙江省自然科基金

摘　　要：本文着重讨论针对三维不规则数据场的体绘制。提出了一种基于空间分割的快速光线投射算法。通过对三维不规则数据场的二次分割，建立一个附加的立方网格结构，并用八叉树进行表示。通过此立方网格快速实现光线投射算法。在绘制阶段采用了两种方法，即总体绘制法和基于体绘制的面抽取法。This paper focuses on the raycasting algorithm to the irregular data field and presents a new raycasting algorithm based on the space segmentation. By dividing the data space, an additional cube grid is added to the irregular data field and an octree is set up on this cube grid in order to implement the raycasting fastly. During the rendering stage, two methods have been adopted, including rendering the whole data field and rendering the isosurface of some part of data. The comparison of two methods is also discussed.

关 键 词：可视化 体绘制 不规则数据场 图形学 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]