利用Sweep造型法进行管网精细化三维建模

发布时间：2018-04-02 21:14

本文选题：管网　切入点：三维建模　出处：《武汉大学学报(信息科学版)》2015年05期

【摘要】：管网三维建模中的一个重要问题是如何根据管线中心线坐标计算得到管网实体表面顶点的坐标,特别是管段与管点衔接处的表面处理。利用扫描(Sweep)造型法,根据实体之间的拓扑连接关系,将一条管线看作是整张连续的曲面,自动建立管线和管点的三维模型,可不必再做拼接处理。此方法通过对管线进行倒圆角及分段处理,在管线中心线各分段点上建立连续标架,计算得到分段点对应的管网实体表面顶点的坐标,并采用布尔并集运算合成管点模型的方法来建立各管网实体的精细化模型。实验结果表明,管网实体表面顶点坐标正确、光滑连续,建模程序简化,性能提高,效果良好。
[Abstract]:An important problem in the 3D modeling of pipe network is how to calculate the coordinates of the surface vertices of the pipe network according to the coordinate of the central line of the pipeline, especially the surface treatment of the connection between the pipe segment and the pipe point.Based on the topological connection relationship between entities, a pipeline is regarded as a continuous surface by means of scanning sweep) modeling method. The 3D model of pipeline and pipe point can be built automatically, without the need of stitching.In this method, a continuous frame is set up on each section of the central line of the pipeline, and the coordinates of the surface vertices of the pipe network corresponding to the segmental points are calculated.The Boolean union operation is used to synthesize the pipe point model to establish the fine model of each pipe network entity.The experimental results show that the vertex coordinates of the solid surface of the pipe network are correct, smooth and continuous, the modeling program is simplified, the performance is improved and the effect is good.
【作者单位】：武汉大学测绘学院;昆明市城市地下管线探测管理办公室;深圳大学空间信息智能感知与服务深圳市重点实验室;昆明理工大学国土资源工程学院;
【基金】：国家住建部2015科技示范工程资助项目(2015-S5-020) 昆明市工业与信息化委员会重点信息化建设项目(昆工信发[2011]270号,昆工信发[2012]108号)~~
【分类号】：TU990.3;P208

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