关键词: 柔性物体, 自由变形, 质点-弹簧模型, 碰撞处理

Abstract: In the computer animation and virtual reality applications，both geometric and physical modeling based methods have been widely studied.In this paper，a mass-spring Bezier volume space is constructed through attaching a basic mass-spring lattice to the bounding box of the object.This method is simpler and faster than that utilizes the common mass-spring model which connects the mass points and springs on the object itself，and it is easier to achieve the global deformation.The mass movement meets Lagrange’dynamics equation.This paper adopts a differential equation to express the movement of particles，and uses numerical solution of the system of real time computation，which increases efficiency.At the same time this paper applies a simple soft-objects collision approach on mass-spring model.The experiment shows that the method is simple and effective.

Key words: soft-object, free-form deformation, mass-spring model, collision handling