关键词: 基于网页的虚拟现实, 树木建模, 基于规则的建模, 轻量化建模, L系统

Abstract: Tree modeling and simulation has always been a challenging research topic in WebVR due to its complex structure and a great amount of data. Especially nowadays with the expansion of 3D virtual scene in web, the contradiction is more prominent between the real-time downloading request of mass virtual forest from client and the limiting network bandwidth. This paper proposes a rule-based method which can help to construct lightweight Web3D forest. This method is based on L-system’s self-similarity and the reuse thinking in WebVR. It can change tree/forest model files to lightweight Web3D files successfully, even only a few kB size. The virtual scene is also suitable for online real-time transmission and browsing in low web bandwidth environment. To a certain extent, the bottleneck problem is solved.

Key words: Web Virtual Reality（WebVR）, tree modeling, rule-based modeling, lightweight, L-system