An Attenuation Deformation Algorithm Based on Unitization Model

This paper presents an algorithm of attenuation deformation based on unitization model to solve the problem that is difficult to control object´s deformation model accurately by adjusting controlling-vertices in free-form-deformation of soft tissue. First, the method unitizes modeling of triangle grid, which enables the model to have versatility. Next, the three-dimension world coordinate of collision point is transformed into vertex coordinate of triangle grid, which leads to directly act on object´s vertex. The approach adapts to local attenuation deformation and implements parabolic attenuation of vertical position offset in region by defining adaptive deformation region. Finally, the experiment is carried out to confirm the effectiveness of the proposed method.