Abstract: To simulate the bending effect for the soft cylindrical objects in realtime, a deformation method was proposed that could achieve the detiail-preservation and surface area-preservation. The method obtained the shape properties such as the bottom and the height from the original cylindrical model. The base model consisted of the regular mesh was built according to the shape properties. The detail model could be obtained by the raidus function of separating from the base model. The uniform deformation algorithm for the base model was adopted to decrease the complexity of the processing. The damping oscillation curve was employed t0 simulate the gofferes indwelling in the inner warping side of the soft cylindrical model. The surface area-preservation could be achieved due to the gofferes. The method has been proved feasible and valid to simulate the bending deformation for 3D soft object by the experiments. It can deform the model containing thousands of vertices in 30 FPS.

Key words: model deformation, bending goffer, detail-preservation, surface area-preservation