【摘要】 建立道路与地面的整体三维模型是实现道路三维可视化的关键。系统分析了现有的道路三维模型构建方法,针对其存在的不足,提出了一种将道路设计面模型与地形表面模型融为一体的整体模型构建方法,该方法基于在约束Delaunay三角网内插入点和约束边的理论,巧妙地解决了剔除落在道路设计面区域内的地形点的问题,实现了道路设计面与地形表面的整体建网。应用道路整体模型可以实现道路景观的三维漫游,评价三维立体线形以及与周围地形的配合情况。更多还原

【Abstract】 The key to realize the 3D road visualization is to establish an integrated road and ground 3D model. The paper analyzes the method of establishing the 3D road model. In order to overcome its existing insufficiencies, the paper proposes a method of integrating the road surface design model and the ground surface design model. On the basis of the theory of inserting points of the constrained Delaunay triangulation and the constraint segments in CDT, the paper solves the problem of erasing the ground surface points that are located on the road design region. With the integrated road model we can browse the 3D road among the ground scenery and access the 3D stereo route and the harmony with the surrounding terrain. 更多还原