The construction organization of expressway subgrade scene is complex.The traditional three-dimensional sub-grade modeling needs the help of modeling software,which can not realize dynamic modeling.In the process of actual integration of subgrade scenes,the terrain scene may cover the filling subgrade surface and the excavation subgrade may float on the terrain sur-face.Based on the research on the above problems,this paper puts forward the dynamic modeling method of expressway subgrade scene,and proposes to use formal expression to represent the subgrade parametric model to realize the instantiation of expressway subgrade construction process.The polygon clipping algorithm based on Shader is used to realize the clipping of the overlapping part of subgrade and culvert,and the constrained Delaunay algorithm is used to triangulate to solve the fusion problem of subgrade and terrain,culvert and terrain.The experimental results show that the highway modeling method realized in this paper shows the sub-grade construction process more intuitively,and increases the realism of the subgrade scene.
万方数据
维普
