细节保持的SPH流体形变约束控制  

Detail-Preserving Shape Deformation in SPH Fluid Control

作　　者：冯刚 刘世光[1,2] Feng Gang;Liu Shiguang(School of Computer Science and Technology, Tianjin University, Tianjin 300350, China;Yianjin Key Laboratory of Cognitive Computing and Application, Tianjin 300350, China)

机构地区：[1]天津大学计算机科学与技术学院,天津300350 [2]天津市认知计算与应用重点实验室,天津300350

出　　处：《系统仿真学报》2018年第6期2368-2376,共9页Journal of System Simulation

基　　金：国家自然科学基金(61672375;61170118);天津市自然科学基金(14JCQNJC00100)

摘　　要：在流体控制研究中,保留丰富的流体运动细节和控制流体在不同目标形状之间形变是极具挑战性的一类问题。为了解决这类问题,提出一种细节保持的SPH流体形变约束控制新方法。将目标形状分为源模型和目标模型,并分别对其体素化得到源控制粒子和目标控制粒子。根据源和目标控制粒子的空间对应关系驱动源控制粒子移动,并通过控制粒子的运动驱动流体粒子运动以实现流体形变。通过源到目标粒子的能量转移方法避免流体形变过程控制力缺失的问题,以保留丰富的流体细节。通过不同的实验场景验证了该方法的有效性。It remains a challenging problem to drive particles-based fluid simulation to match target shape and deform fluid shape between different models smoothly in fluid control, especially when the natural fluid motion should be preserved. To achieve the desired behavior, the models are divided into source objects and target objects, and the control particles are generated from them. According to a space point correspondence between source control particles and target control particles, the control particles＇ movements are calculated which drive fluid to match different models. The control energy from source control particles is transferred to target control particles so as to avoid the leak of control energy and preserving fluid detail. The effectiveness of the method was demonstrated in various scenarios.

关 键 词：流体模拟 流体控制 细节保持 流体形变 SPH 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]