Design And Realization Of The3D Terrain Editing System

With the development of Computer visualization technology, three-dimensional terrainis put into use in many fields, such as3D games, televisio animation,3Dgeographyinformation system and so on. Researchers in various fields can use three-dimensionaldisplay technology to express two-dimension-data information, which raises theworking efficiency.The three-dimensional terrain system in this thesis is derived fromthe need of geology meteorology researchers. According to the practical measurementof DEM, it can simulate the possible conditions if there is strong wind and sleet in realplaces.This can be used to provide visual reference for geographical and meteorologicalresearchers.Firstly，combined with the background of the project，this paper decided to adoptthe real DEM data to generate3D terrain. Then, it discussd the display of terrain, theterrain simplification and texture synthesis of terrian.Following work be done:1.analysis the project, collecting relevant data, and according to the requirements of theproject, each function module is builded up in the system.2. In the general design, RSGand TIN are introduced, and compare their advantages and disadvantages,it is used tocombinat them.3. Introduction and analysis of the terrain display process based onOpenGL, and the rendering speed has made some improvements.4.The TIN terrainmodeling is commonly used in Delaunay triangulation algorithm and the LODsimplified technology will be introduced.By using VC++programming technology and OpenGL API，we realize this systemin Visual Studio platform. After repeated testing and debugging, we produced meet therequirements of the project of the terrain, and simulated the wind, rain and snowweather effects.