基于体元刚体破碎特效仿真  

Volume Based Rigid Body Fracturing Effect Simulation

作　　者：曾亮[1] 吴亚刚[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2009年第A01期260-262,共3页Computer Engineering & Science

基　　金：国家973计划资助项目(2009CB723803);国家自然科学基金资助项目(60873120)

摘　　要：本文提出一种局部预破碎模式,通过八叉树剖分对体元模型进行结构化并与用户交互式地锁定局部破碎区域,再在模型结构上抽取包含在破碎区域内的离散体元,最后使用线性约束连接抽取出的体元进行动力学仿真。仿真过程中外界碰撞冲击线性约束并使之受损,文中使用统一算法检测损坏的约束,约束的损坏使得体元分离出去形成破碎现象。实验表明,该模式较好地体现了破碎效果,一定程度上提高了仿真实时性。A local pre-fracturing pattern is proposed that we construct an octree structure of the volume based rigid body, and then we lock the fracture area interactively and extract the discrete elements contained in that area, finally we use linear constraints to connect the elements in the dynamic simulation. During the simulation, linear constraints are attacked by external force and it will destroy the constraints, we use a unified algorithm to detect the destroyed constraints which will lead fracture. Tests show that the local pre-fracturing pattern works well and improves the real time feature on a certain extent.

关 键 词：局部预破碎 八叉树 线性约束 刚体 动力学仿真 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]