一种线框矢量模型表示的地质体折面剖切方法  

Cutting and splitting on geological body with wire frame model

作　　者：李楠[1] 曾俊钢[2] 肖克炎[1] 陈学工[2] 邹伟[1] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]中南大学信息科学与工程学院,长沙410083

出　　处：《测绘科学》2011年第6期28-31,共4页Science of Surveying and Mapping

基　　金：国家科技支撑计划"区域综合信息矿产资源评价系统开发与示范"项目(2006BAB01A01);危机矿山三维信息评价系统以及中央事业单位基本业务费

摘　　要：线框模型是三维计算机图形学中重要的物体可视化表示模型,在矿山勘查软件中得到广泛的应用。该模型主要用于描述、管理复杂三维地质体。本文提出一种基于线框模型表达的地质体的折面剖切方法。本算法首先建立剖切模型;其次,计算折面剖切面与地质体之间的交线并求得其切割剖面;第三,分割原始线框模型地质体;第四,对分割后的线框模型进行模型重构。本文采用碰撞检测方法,减少了求交计算次数。最后,作者使用本方法程序对不同地质体进行单面、折面和十字切割。Wire Frame Model is one of the most important model to express objects in Three Dimension Graphics. Currently, it is widely applied in software of mineral prospecting to manage and express great-complicated Geological Body. This paper improved a cutting and splitting method for geological body based on wire frame model. Firstly, it created cutting and clipping model. Secondly, it got profiles by calctflating the intersections between cutting planes and triangles in geological bodies. Thirdly, it split original geological body into two parts. Fourthly, it reconstructed the two parts. Besides, this paper applied an algorithm of collision detection by building oriented-bounding boxes to decrease the calculation of intersection. The experiment showed that the algorithms in this paper could be applicable and efficient.

关 键 词：剖切 线框模型 不规则三角网 

分 类 号：P209[天文地球—测绘科学与技术]