Soft Body and Deformable Object In Computer Graphics

There are different uses of soft body in computer graphics and digital entertainment. They are involved in many effects such as fracturing, tearing, cutting. Those objects can have a rest position (in case of blobby effect, cloth) or without rest position (in case of plasticy). The main difference between rigid and soft bodies is the fact soft bodies can change their shapes during the simulation and by squeezing or tearing they loses energy. By consequence the collision response are affected. It exists plenty of different techniques to simulate soft body. We can split those algorithms into two main categories : mesh based methods (FEM / Spring mass) and mesh free methods (Implicit surfaces / Point based / Meshless / SPH).