一种应用参数曲面的动态自由变形方法

本文提出了一种动态自由变形方法，被变形物体首先附在两张参数曲面上，当参数曲面的形状发生变化时，物体会随之变形。这两张参数曲面分别被称为形状曲面和高度曲面，其中形状曲面用于控制变形物体的形状，高度曲面用于控制物体沿着形状曲面法向的高度。

ANIMATED FREE-FORM DEFORMATION FOLLOWING THE SHAPE OF PARAMETRIC SURFACE

An animated free-form deformation method is presented in this paper. The deformation is achieved by attaching the object to be deformed onto two parametric surfaces, which are called the shape surface and height surface respectively. In the proposed deformation method, the shape surface controls mainly the shape of the deformed objects while the height surface modifies the height of the objects. After the deformation is defined, animated deformation can be set up through thelocal coordinates of the deformed objects, the shape of the two parametric surfaces or even the combination of them. By this way, predefined shape animation can be realized. The experimental results show that the proposed method is intuitive, flexible and easily controlled.