关键词: 分形, 三维L系统, 递归算法, 树, 摇曳

Abstract: How to simulate fast and realistically tree swaying in wind is still a great challenge topic in computer graphics.This paper addresses deformation of tree swaying by presenting a new method which combines fractal with physical mechanics deformation.First this method models trees by fractal，and then gives a wind model by simulating wind field based on its power and characteristics of the hierarchical structure tree.Finally the deformation of tree swaying is further simulated based on the principle of physical mechanics.Many experiments with this new method illustrate that animations of tree swaying in wind can be fast and easily realized，and that various states of trees are naturally generated.

Key words: fractal, 3D L system, recursion algorithm, tree, swaying