3d Highway Landscape Modeling and Visualization

In this paper, data model and structure of the 3D road model, which is constructed by Constrained Delaunay Triangles (CDT) and integrated with terrain model, are proposed first, and the method of judging the maximum angle was used to build the triangle net. Considering the characters of strip-distributed and data volume of highway, the following two methods are developed to enhance the 3D roaming velocity. One is the multi-thread technology; the other is the brief “Buffer-Quadtree” technology, which is developed based on Quadtree, by creating a buffer along with the data block edge, And then code for every data block using a rule of linear Quadtree. According to the view coordinate, using multi-thread, we can decide that which block will be loaded. Finally, a software prototype “VirtualWay”, which is developed by Vc++6.0 and OpenGL, is introduced, and several experiments are done to proved the methods feasibility.