三维管网自动建模研究  

Study on the Automatic Modeling of 3D Pipe Network

作　　者：黄明[1] 张岩岩[1] 盛国君 李军 

机构地区：[1]北京建筑大学现代城市测绘国家测绘局重点实验室代表性建筑与古建筑教育部工程中心,北京100044 [2]北京金绘天地技术有限公司,北京100023

出　　处：《地理信息世界》2016年第2期55-61,共7页Geomatics World

基　　金：国家测绘局公益项目(201512009);国家地理信息局科技计划项目(2013CH-15);国家"973"项目(2012CB725301);北京市教育委员会科技计划一般项目(2016子项目49)资助

摘　　要：管线三维建模是构建数字城市的重要内容,目前,管网建模技术主要是基于手工或标准连接件的半手工建模,而三维管网的全自动建模存在建模过程复杂、效率低、模型质量差等不足。针对这一问题,本文提出了一种基于管线路径扫略、形体放样及布尔运算的复杂三维管线模型自动生成算法。根据截面形状参数曲线,运用图形变换,沿路径确定内插截面法线实现管线路径扫略三维模型构建;形体放样则是以放样截面间以各自顶点组成三角形为基元的小平面来构造管线表面,采用逼近方式拟合三维管线的整体形状;布尔运算的联合、交、差几何计算实现管网交叉贯通复杂模型的三维建模。通过实例验证,表明了该方法能够快速、高效实现任意复杂管网高质量三维模型的构建。3D modeling of the pipeline is an important part of the Digital City. At present, the pipe network modeling technology is mainly in manual or semi-manual, and the automatic modeling of 3D pipe network has some disadvantages of complex, inefficient, poor quality and so on. To solve this problem, an algorithm for the generation of complex pipeline model based on sweeping, lofting and Boolean operations was proposed. According to parametriccurves of the sectional shape, a normal of the cross-section using graphics transformation is proposed. Then the model construction based on sweeping along the path is realized. Loft constructs the pipeline surface with triangle plane composed of vertices of the loft sections, using the method of approximation to fit the overall shape. The construction of three-dimensional model for the complex pipe network which cross through each other by using Boolean operations union, intersection and subtraction operation. By instance, the results show that the method can construct complex 3D pipe network model with high quality, rapidly and efficiently.

关 键 词：三维管网 三维自动建模 路径扫略 形体放样 布尔运算 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]