摘  要

地形绘制是三维场景绘制的重要组成部分，在计算机动画、游戏动漫等许多领域具有重要的应用价值。本文重点研究基于高程图技术和OpenGL技术的三维地形绘制方法。首先，运用LOD技术生成高程数据, 并做平滑处理。 再对高程数据着色后利用OpenGL 纹理映射技术实现三维地形的绘制输出。上述方法的实验结果取得预期效果, 基本符合工程需要。

关键词：地形绘制；高程图；LOD；计算机仿真

ABSTRACT

Terrain rendering is a significant composition of three - dimensional scene rendering. This paper researches the method ofthree- dimensional terrain rendering based on Elevation map technology and OpenGL. Creating elevation data with The use of LOD techniques and smoothing treatment is done. Rendering and exporting the three- dimensional terrain with texture mapping technique of OpenGL after coloration. The experiment results of this method are expected so as to meet the requirements of projects.

Key words：terrain rendering; elevation map；LOD；computer simulation;