中文摘要：

草体作为自然场景的一种重要组成元素,其数量众多、覆盖范围广,因此很难实现实时绘制,大规模草地场景真实感模拟已成为计算机图形学中研究的热点和难点之一.文中对20多年来草地场景真实感模拟技术的发展情况进行综述,分别从绘制技术、LOD表达、动态模拟以及业界现状等几个方面做了比较深入的介绍,分析并比较了一些典型方法的基本原理和优缺点;最后对该领域未来的发展趋势进行了展望.

英文摘要：

Grass is an important element of nature scenery,but a grassland is difficult to render in real-time due to its large amount of grass and wide covering range.Consequently,realistic simulation of large-scale grassland turns to be one of the challenging topics in computer graphics.This paper provides a survey on the realistic simulation of grassland in the last two decades,with a detail introduction to the rendering,LOD,dynamic simulation techniques and the industry status.Some fundamental principles,merits and drawbacks of the typical methods are analyzed and compared.Finally,the future development on this topic is outlined.