摘要： 采用顶点缓存技术和贴图压缩技术来提高计算机对大规模三维场景的处理速度,实现了一个三维地形飞行浏览系统,能够在微机上以自然流畅的速度实现整个淮河流域的三维地形飞行浏览。为了在飞行浏览时不致于迷失方向和位置,本系统还提供了整个淮河流域的鸟瞰图,具有用户交互和自动导航两种工作方式。

关键词: 地形, 顶点缓存, 贴图压缩, 布告牌, B样条曲线

Abstract: In this article, we introduce a high-speed terrain flying-through system. With the help of "vertex buffer" and "texture compress", this system could display the 3D terrain model of whole drainage area of Huaihe-river at interactive frame rates. This system also offers a bird's-eye-perspective, to give users a clear presentation of current location and direction on the terrian. When flying through the terrain, user can switch between interactive-mode and auto-pilot-mode any time.

中图分类号: 

• TP391.41