玉米群体冠层实时物理模拟  

Real-time Physical Simulation of Corn Canopy

作　　者：李长锋[1] 郭新宇[1] 陆声链[1] 赵春江[1] 

机构地区：[1]国家农业信息化工程技术研究中心,北京100097

出　　处：《系统仿真学报》2009年第16期5088-5091,共4页Journal of System Simulation

基　　金：国家自然科学基金(30700493);国家高技术发展计划(2007AA10Z224);北京市自然科学基金(4081001)

摘　　要：植物器官具有柔性体性质,如何快速高效地处理植物群体内部、植株之间,以及植物器官之间的碰撞检测及变形问题是进行植物群体实时物理模拟的关键。以玉米群体冠层为例,提出了四面体网格结合皮肤网格的双层架构的植物群体物理模拟方法。该方法创建与植株精细的三角形皮肤网格模型相对应的较粗糙的四面体网格包络模型,在四面体网格模型上进行物理模拟、碰撞检测等计算,然后通过四面体网格与皮肤网格间的关联将模拟结果变换到三角形精细网格模型,从而实现了较为逼真、稳定的植物群体实时物理模拟效果。Plant organ is physically soft. The key to plants colony real-time physical simulation is to efficiently handle the collisions and deformations happening inside the colony and between the plants and their organs. Take com colony canopy as an example, a simulation framework was proposed, which integrated tetrahedral mesh with skin triangle mesh to physically simulate the plants colony canopy. Firstly, a coarser tetrahedral mesh around the triangle mesh was created, then this tetrahedral mesh was used to simulate. The original triangle mesh was deformed along with the tetrahedral mesh. The triangle mesh was displayed on the screen in the end. Smooth deforming animation of virtual plant models were thus obtained in real-time with highly realistic rendering effects.

关 键 词：虚拟植物 物理模拟 可变形物体 四面体网格 Verlet积分 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]