双层弹簧模型驱动的植物叶片运动模拟(英文)  

Bi-Layered Mass-Spring Model for Leaf Motions

作　　者：陆声链[1,2] 赵春江[1] 郭新宇[1] 李长锋[1] 

机构地区：[1]国家农业信息化工程技术研究中心,北京100097 [2]上海交通大学数字农业实验室,上海200030

出　　处：《系统仿真学报》2009年第14期4383-4388,共6页Journal of System Simulation

基　　金：China National High Tech R&D Program under grant No2007AA10Z224;Beijing Natural Science Foundation of China under grant No. 4081001;the National 11th Five-year Plan for Science &Technology of China under grant No. 2006BAD10A07

摘　　要：提出了一种交互式的植物叶片运动(特别是卷曲和萎蔫)模拟方法。该方法用一个三维骨架结构表示叶片的边缘轮廓,并通过细分的方法生成叶片的网格曲面。在此基础上,构建了一个由层次化弹簧构成的双层质点-弹簧系统,该弹簧系统被用来控制叶片的运动,叶片的卷曲通过收缩上层弹簧来实现,而叶片的萎蔫或展开则通过释放弹簧来驱动。通过提供的交互式界面,用户能够交互地控制该弹簧系统的运动,从而生成各种叶片的运动动画。这种方法已被用来交互地模拟番茄叶片的卷曲过程和黄瓜叶片的萎蔫过程,模拟结果较好地重现了与真实情况相似的叶片运动过程。A representation for plant leaves and an interactive modeling system for simulating motion animation of leaves, especially curling and wilting, were described. The proposed representation of leaf surface used a model of a leaf consisting of a three-dimensional skeleton formed by its outline and a surface membrane representing the leaf lamina that spans the void within the outline. Then a subdivision scheme was used to generate a detail mesh of the surface. A bi-layered mass-spring model consists of hierarchical spring was developed basing on the subdivision mesh. The mass-spring systems were used to simulate the motions of leaves. Curling of a leaf blade was simulated by animating the spring tensions, while unfolding and wilting was simulated by animating the spring relaxation. With a suitably designed interface, animations could be obtained by manual interaction, which allows for the creation of a wide range of motions. The proposed techniques were applied to interactively control dynamic simulations of the curling process of a tomato leaf, and the wilting process of a cucumber leaf.

关 键 词：植物叶片 质点-弹簧模型 基于物理的建模 运动模拟 自然现象模拟 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]