Research And Improvement Of Large-scale Modeling And 3d Terrain Rendering

3d visualization technology can be intuitive, real display 3d terrain surface characteristics, in our daily life, economic construction and scientific research, military combat etc widely application value and broad application prospect. In particular, in military terms, the terrain is virtual battle environment all of the major virtual natural scenery, the part in military training and operational research and equipment development has wide prospect. This article is in the background, with the modern computer technology, in computer platform established a alternative traditional simple 2d map and entity sand table corporeality 3d terrain roaming system.This paper focuses on the key computer 3d terrain visualization technology is studied, OpengGL in vc++and the development environment, terrain data based on the height of the real 3d terrain modeling of cartographical; Probes into 3d terrain visualization of based on contour, as well as four binary tree based on the real terrain imaging algorithm, and put forward the quadtree terrain rendering to optimize and improve the methods; Discusses the realistic processing, realize terrain texture mapping detailed process and the method; Discusses the method to realize human-machine interaction roaming; The structure and function of system design and realization.Based on the application of oriented to virtual battle environment, this paper demand 3d terrain data organization model, process details generation, scheduling method, real-time rendering algorithms and real-time rendering technology studied, completed the algorithm. Eventually constructed a realistic 3d terrain roaming system. This system in actual application initially solved some key technical problems, high stability, high maneuverability, interaction and has certain practical value.