关键词: 虚拟植物, 景观设计, 场景建模

Abstract: There are two kinds of vegetation modeling：modeling of single tree and modeling of scene.Single tree modeling can be subdivided into botany-based and computer graphics-based method.Part I of the paper is devoted to the software，techniques and applications of single tree modeling.Three well-developed modeling tools：L-system，AMAP and Xfrog is discussed and compared in detail in this part.Part II is about the modeling of scene：DEM to visualize the terrain，landscape design and then，modeling the“virtual world”.A review of regular methods is put forward first，followed with a survey of the ways to increase modeling speed，flyover fps and improve the visual impact.Finally this paper summarizes the exiting issues and highlight the perspectives of further research and applications.

Key words: virtual plant, landscape design, scene modeling