摘要
主要研究和探讨了基于DirectX的真实感地形实时渲染技术。文章在规则格网DEM基础之上，采用基于LOD的DEM多分辨率动态构网技术和多层纹理贴图方法，生成比较真实的地面景观，同时添加了天空、烟雾等效果，使显示效果更加真实。生成的三维地形的渲染速度达到了20-30帧，基本上满足了实时显示的要求。
This paper researches and discusses the technique of third-dimension terrain romancing basing on DirectX. Based on the digital elevation model, it takes multilayer-texture technique and creates real ground landscape. In the same time, this paper adds the effect of sky, smog and etc. This effect makes the created terrain more real. The rate of creating third-dimension terrain can reach 20 - 30 frames per second. This rate can satisfy basically the need of displaying quickly.
出处
《海洋测绘》
2006年第4期42-45,共4页
Hydrographic Surveying and Charting
关键词
地理信息系统
数字高程模型
纹理
地面景观
地表细节
geographic information system （ GIS ）
digital elevation model （ DEM ）
texture
ground landscape
ground surface detail
