【摘要】 地表模型显示在虚拟现实中有着广泛而重要的作用。本文结合目前地表模型显示的相关理论和方法 ,提出了一种基于倾斜角阈值简化方法和实时连续地表细节层次模型生成算法相结合的二次简化多分辨率层次模型方法 ,以加速地表模型的简化操作 ,并且在 PC机环境下实现了较为复杂的地表模型的实时绘制 ,得到了比较理想的效果。更多还原

【Abstract】 Terrain surface model display has wide ranged and important applications in the Virtual Reality. This paper introduces in detail the relative theories and algorithms, such as simplification with threshold value of tilt angle and the real time continuous level of detail rendering of digital terrain models. Through analysis of the special requirement for application on PC platform, a method with two steps simplification is provided and the experimental results show its high quality and efficiency.更多还原