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1、1000-9825/2003/14(03)0619©2003JournalofSoftware软件学报Vol.14,No.3*基于改进的弹簧-质点模型的三维服装模拟1+21刘卉,陈纯,施伯乐1(复旦大学计算机与信息技术系,上海200433)2(浙江大学计算机科学与工程系,浙江杭州310027)Simulationof3DGarmentBasedonImprovedSpring-MassModel1+21LIUHui,CHENChun,SHIBai-Le1(DepartmentofComputingandInformationTechnology,FudanUniversity,Shang
2、hai200433,China)2(DepartmentofComputerScienceandEngineering,ZhejiangUniversity,Hangzhou310027,China)+Correspondingauthor:Phn:86-21-65642219,E-mail:huiliu@fudan.edu.cn;realcomet_l@yahoo.comhttp://www.fudan.edu.cnReceived2001-11-28;Accepted2002-04-10LiuH,ChenC,ShiBL.Simulationof3Dgarmentbasedonimpr
3、ovedspring-massmodel.JournalofSoftware,2003,14(3):619~627.Abstract:Someproblemsstillexistin3Dgarmentmodelingandsimulation,includingthatthemodeliscomplex,theefficiencyislow,andthestructuralcharacteristicsofgarmentareignored.Animprovedspring-massmodelisproposed,bywhich2D3Dtransformationandsimulatio
4、nofgarmentareformulatedunifiedly.Thedynamicsystemofmodelingandsimulationisderivedandsolvedusingtimedifferentiatemethod,withgivencompositionandexpressionofinternalandexternalclothforcesintheformulation.Andthenthesimulationalgorithmisdescribed.Overcomingtheseriousweaknessrepresentingclothproperties
5、simplyofpreviousmodel,theimprovedmass-springmodelconsidersmechanicalpropertiesofclothsuchasstretching,shearingandbending.Structuralcharacteristicsofgarmentsuchasdartandpleataretookintoaccounttoo,thuscomplexgarmentpatterncanbemodeledandsimulated.Comparedtheefficiencyandtheeffectofsimulationwithoth
6、ersimulationsystems,theresultingsimulationsystemisfasterandmorerealistic.Thetechniquehasbeenusedinsomegarmententerprisesandgetswellresponses.Keywords:clothmodeling;simulation;spring-massmodel;computer-aidedgarmentdesign摘要:针对三维服装造型与效果仿真中存在的模型复杂模拟效率低忽略服装的结构特征等问题,提出了改进的弹簧-质点模型.利用该模型统一建立了2D3D映射和服装真实感
7、模拟方程,给出方程中质点所受内力和外力的组成与表达式以及动态系统的推导和求解过程,并且描述了模拟的具体实现算法.改进的弹簧-质点模型克服了原有模型对服装织物的材料性能表达单一的缺点,考虑了拉伸剪切弯曲等力学性能以及省/褶等结构因素对服装外观的影响,实现了较复杂的服装外型.通过从效率与效果两个方面与其他模拟系统进行比较,发现该技术的模拟效率较高而且模拟结果较为真实.该模拟技术已经在服装企业推广应用,用户反映良好.*Supportedb
