基于Multigen Creator的三维地形应用实现

Implementation of Three-dimensional Terrain Based on MultiGen Creator

结合三维建模软件MultiGen Creator2.6的地形数据库模块,分析了三维地形生成的方法和技术.以航天发射场的地形为研究区域,根据航天发射场建模要求较高的实时性、精确性和真实感的特点,分别提出了新的地形源数据(栅格地图)转换方法,总结出了利用等高线带贴纹理的方法,并提出了Polymesh/IrregularMesh(多边形网格/不规格网格)算法与采样型网格简化算法结合的方法.在此基础上,形成了一套行之有效的三维地形生成应用方案,成功建立了视觉效果较好的三维地形,已应用于航天发射场的三维模拟系统中.

This paper mainly analyzes methods and technology of three-dimensional terrain with terrain module in MultiGen Creator2.6. According to character of real-time, accuracy and reality in terrain modeling, it gives the application scheme based on the terrain of space launch site. An new source data of terrain（ grid map） conversion method is proposed. The authors sum up paste texture with contour strip and also put forward an method of combining Polymesh/Irregular Mesh algorithm with sampling mesh predigestion algorithm. Projection method and ellipsoid, setting LOD are chosen, an effective 3D terrain application project is given. This paper generates a three-dimensional terrain of space launch site with perfect visual effect, and the terrain has been applied to the three-dimensional simulation system.