空间四面体剖分及可视化系统设计  

Spatial Tetrahedron Profiling and Visualization System Design

作　　者：吴智慧 张志华 胡长涛 冯东东 WU Zhi-hui;ZHANG Zhi-hua;HU Chang-tao;FENG Dong-dong(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]地理国情监测技术应用国家地方联合工程研究中心,兰州730070 [3]甘肃省地理国情监测工程实验室,兰州730070

出　　处：《科学技术与工程》2023年第10期4072-4078,共7页Science Technology and Engineering

基　　金：国家自然科学基金(41861059);兰州交通大学优秀平台项目(201806)。

摘　　要：地质体真三维建模是地学信息系统的核心问题之一。针对三维建模时模型属性表达缺失和无法进行空间分析的问题,提出了一种TetGen结合WebGL来构建三维模型的新方法。该方法使用TetGen构建模型,既保留细节特征又能高效率完成地质体三维建模及模型的优化。同时,借助WebGL构建了三维模型的3D可视化系统,实现了细节层次模型的展示,并利用js完成模型的空间分析基本参数计算。提出的三维建模方法结合可视化空间表达的方式,不仅实现了三维模型快速准确的四面体剖分,还完成模型数据的组织与管理,强化了模型的空间分析能力,拓宽了模型在地学领域的研究与应用。True 3D modeling of geological bodies is one of the core problems of geological information systems.A new method of TetGen combined with WebGL is proposed to build 3D model for the problem of missing model attribute expression and inability of spatial analysis in 3D modeling.This method uses TetGen to build the model,which can preserve the detailed features and complete the 3D modeling and model optimization of the geological body with high efficiency.At the same time,a 3D visualization system of the 3D model is constructed with the help of WebGL,which realizes the display of the detail level model and completes the calculation of the basic parameters for the spatial analysis of the model using js.The 3D modeling method combined with visual spatial representation proposed in this paper not only realizes fast and accurate tetrahedral dissection of 3D models,but also completes the organization and management of model data,strengthens the spatial analysis capability of the model,and broadens the research and application of the model in the field of geology.

关 键 词：四面体模型 属性表达 可视化建模 WEBGL 空间分析 

分 类 号：P208[天文地球—地图制图学与地理信息工程]