In virtual landscape, the realistic simulation of flower motion has an important effect on the plant interaction. Due to the complex topology structure of plant stem and petals, plant dynamic simulation is becoming a challenge topic in the recent virtual landscape research. In this paper, a method of flower dynamic simulation was presented based on inverse kinematics. The movement of flower can be regarded as a bending rod in mechanical space. A flower rod model is provided by labeling skeletal nodes in flower stems and analyzing the force. In order to make the result more reality, the elastic force in the skeletal nodes is taken into consideration to realize the smooth motion effect. Different types of wind can be set in the simulation system with different force and speed. At last, the algorithm validity and efficiency were tested by using different flower models.%花卉植物茎、枝、叶和花瓣结构复杂,运动行为仿真成为目前虚拟植物的研究热点之一.该文基于花卉植株的高精度的建模,将动力学理论和弹簧—质点模型应用到虚拟花卉植物跟风力的交互运动仿真中,提出一种实时模拟花卉植物与风场交互的方法.运用多层次反向动力学原理和布料模拟系统原理分别实现了单株花卉植物在风场中自身运动和群落花卉在风场中的整体运动的模拟.可以模拟在球形风场和平面风场中,随风力和风速实时变化的单株或群落花卉植物的运动行为特征,模拟效果逼真自然,具有较强的真实感.该研究可为虚拟植物运动仿真提供参考.
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