在以人体模型为基础的3维服装CAD系统中，为了获得设计师所需形体尺寸各异的人体模型，提出了一种多因素驱动人体模型变形的方法。该方法将人体模型的变形驱动因素分为尺寸因素、姿态因素和局部体形因素3类，并相应地提出了尺寸驱动、姿态驱动及局部体形驱动的人体模型变形算法。其中尺寸驱动采用基于截面环的算法和基于模板插值的算法，通过对人体特征尺寸进行改变来驱动人体变形；姿态驱动是通过关节变形算法来实现特定姿态的变形，并通过建立姿态库，以实现快速姿态匹配；局部体形驱动包括基于特征面尺寸和基于特征面形状的调整，以得到具有局部特征的人体。实例表明，该方法可对已有的人体进行快速变形，以获得用户所需的人体模型，从而满足了服装CAD中对人体模型的多样性需求。

Virtual human deformation is one of the most important research focuses,and remains problematic in the research field of 3D garment CAD system.In this paper,we present multi-factor driven deformation methods to deform virtual human models.The driven factors are classified into three classes: size,posture and local figure.Three deformation methods are proposed to deal with the three factors.First,we use a feature size driven method to change the virtual human size,and this method can be divided into cross-section ring based method and templates interpolation based method.Then we implement a posture driven deformation to achieve a specific human body posture,and establish postures library for rapid gesture matching.Finally,we apply a local figure driven deformation which is achieved by changing the size or shape of the feature cross-sections to obtain the virtual human with local feature.Some given examples show that this method is very flexible to have diverse virtual human models for garment CAD.