引用本文: 周京春, 李清泉, 施昆. 利用Sweep造型法进行管网精细化三维建模[J]. 武汉大学学报 ( 信息科学版), 2015, 40(5): 661-666.
ZHOU Jingchun, LI Qingquan, SHI Kun. Refined 3DModeling of Pipeline Based on Sweeping Method[J]. Geomatics and Information Science of Wuhan University, 2015, 40(5): 661-666.
 Citation: ZHOU Jingchun, LI Qingquan, SHI Kun. Refined 3DModeling of Pipeline Based on Sweeping Method[J]. Geomatics and Information Science of Wuhan University, 2015, 40(5): 661-666.

## Refined 3DModeling of Pipeline Based on Sweeping Method

• 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: One of the important problem in the field of pipeline 3Dmodeling is how to calculate the co-ordinates of vertices on the surface of pipelines,especially surface processing of piping connections.According to the connectivity topology of pipeline networks,using the“Sweep”modeling method cangenerate the whole surface of the pipe and establish the pipe model automatically without having todeal with the issue of joining patches.Through recursion after filleting and subdividing the pipe cen-terline to establish continuous frames at sub-points,vertices on surface corresponding to sub-pointscan be calculated,and then use the boolean union method to generate pipeline joints.The results showthat the coordinates of vertices on the surface is correct,and the entire surface is continuous andsmooth.The sweeping method reduces the steps of establishing the pipe model and has a better per-formance,and it achieves a good effect in the practical applications.

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