摘要
文中提供了一种对植物叶子造型的新方法,可以非常真实地展现叶子在干枯、老化过程中几何形态的变化.基于植物学和物理原理,文中引入了双层结构模型表达叶子的力学结构,很好地模拟了不同种类植物叶子形状的多样性.文中首先分析了叶子形状变化的原因,即在叶子枯萎过程中,叶肉和叶脉由于各自不同的组织结构,导致了收缩比例不同,从而在物理模拟中,通过建立关于叶子基本结构的双层质点-弹簧模型,并对上下两层的不同参数的合理设置,很好地表现了叶肉和叶脉的不同力学特性.双层模型的相互作用,决定了叶子最终变形的方式和效果,由此可以得到非常接近真实树叶的各种叶子形态.
This paper presents a method for the efficient simulation of a large number of plant leaves, realistically showing their weathering process in autumn time, with various deformed shapes. In modeling various shapes of leaves for weathering, the authors introduce a botanically and physically based method is introduced for simulating variations of leaf shape by using a double layered model （DLM）. This model takes advantage of the key observation that the withered shapes of leaves are caused by different shrinkages between the mesophyll cells and vein cells during the aging process of leaves. By setting up the mass-spring system in two interconnecting layers, different kinetic manners of mesophyll and veins can be simulated respectively. Meanwhile the double layers affect each other and determine together the deformed shape of leaves.
出处
《计算机学报》
EI
CSCD
北大核心
2009年第2期221-230,共10页
Chinese Journal of Computers
基金
国家“九七三”重点基础研究发展规划项目基金(2002CB312102)资助
