【摘要】 研究了一种用数字地面模型和公路设计数据实现实时三维动画的方法。首先利用Delauany三角化方法构造数字地面模型,然后将公路设计数据与数字地面模型进行叠加。为解决叠加过程中的相容性问题,提出了先将地界约束边界线插入Delauany三角形网格,然后重新三角化的方法。为加快渲染速度,提出了多分辨率显示和网格数据结构相结合的加速措施。文中的方法在实践中得到了验证。更多还原

【Abstract】 A method is presented to implement real-time 3D road animation coupled with road design data and digital terrain model(DTM). Firstlythe digital terrain model is constructed using Delaunay triangulation technique, and then the road design data is merged into the DTM. The techniqueof inserting the constraint border segments into the Delaunay triangular mesh and re-triangulating the mesh is introduced to deal with thecompatibility of the DTM and the design data. In order to speed the rendering model, LOD and grid data structure method is presented. Themethod is validated by some engineering examples.更多还原