大比例尺地形仿真中地形建模与实时绘制技术的研究

Research on Terrain Model Construction and Manifestation in Real Time of Large Scale Terrain Simulation

大比例尺地形环境仿真以TIN DEM为基础,可精细描述复杂的地形环境,但是在建模、实时绘制以及应用等方面都较以Grid DEM为基础的中小比例尺地形环境仿真更为复杂。文章研究了大比例尺地形环境仿真在建模过程中模型与场景的融合问题及实时绘制中TIN DEM的分块问题最后以实践为基础给出优化设计的实例。

While the large scale terrain simulation which is based on TIN DEM can describe complex terrain environment in detail, it is more difficult for it to construct models, render scenes in real time than the small scale terrain simulation which is based on Grid DEM. This thesis researches on the syncromesh of the models and the terrian when using large scale terrain simulation to construct models and the division problem of the TIN DEM when rendering scenes in real time. In the end, the paper gives the advanced designing method based on practice.