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.