基于格网DEM的自适应等值线图及UG实现  

An Adaptive Contour Diagram Base on Grids DEM and implement of UG

作　　者：宋敏[1] 张见明[1] 覃先云[1] 

机构地区：[1]湖南大学汽车车身先进设计与制造国家重点实验室,长沙410008

出　　处：《微计算机信息》2010年第30期181-182,214,共3页Control & Automation

基　　金：教育部长江学者与创新团队发展计划项目资助(531105050037);湖南大学汽车车身先进设计制造国家重点实验室自主研究课题(60870003)项目资助;国家自然科学基金资助项目资助(10972074);国家863计划资助项目资助(2008AA042507)

摘　　要：本文结合不规则三角网格法与规则矩形网格法对等值线追踪的优缺点,在矩形网格法的基础上,提出基于网格单元的等值线自适应算法来克服线性插值造成折线的缺点。由绘图区域边界与等值线端点的相关性形成连通区域,根据连通区域的值赋予对应的颜色,最后填充所有的连通区域完成等值线图的绘制。通过UG二次开发编写出在CAD模型上直接显示等值线图的软件包。温度场数值算例的显示结果表明不仅等值线自适应算法取得很好的显示效果,而且等值线取得了可控制的光滑效果。For the shortage that broken line would be created when the linear interpolation was taken,coupled the irregular triangular grid method with regular rectangular grid method on the advantages and disadvantages of contour tracking,and based on the rectangular grid method,some self-adaptive algorithm using grid subdividing was presented in this paper.Connect region is established by the relativity between the boundary and the endpoints of contour,and then is filled by the color corresponding the value of region.The class for plotting the contour in UG was developed.Numerical examples show that not only the program provides excellent visual effects,but also the governable smooth of the contour can be obtained.

关 键 词：等值线 矩形网格 二次开发 自适应 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]