Simulation Study Based On The Physics Of The Real Time Bomb Plastic Shape Change

In recent years, elastoplastic deformation simulation has been used in movie special effects, the deformation scene in the game, the medical training system, bionics research, the exhibition of some three-dimensional environment and so on. Elastoplastic deformation simulation has become rather popular in computer graphics as a research field. Currently the available elastoplastic deformation simulation is divided into physics and non-physics-based simulation in two ways. Physics-based simulation of elastic-plastic deformation using physics theorem in the real world can perfectly reproduce the real movement and realistic deformation of virtual objects in virtual space. It's used in the game and medical training and brings a shocking sense of realism, and so greatly promotes the application of elastoplastic. Despite its extensive applications and development space, at present physics-based simulation of elastoplastic deformation simulation remains many problems to resolved.Based on the physics-based simulation, in order to solve the real-time of elastoplastic deformation , this paper adopts the traditional mass-spring modeling methods and uses Euler's equation in the equations of motion. The calculation is simple and so good to meet the requirements of real-time computing. In order to overcome the shortcomings of the instability of Euler method and that the simulacrum not moving as a whole using mass spring model, we adopt shape matching algorithm of stiffness outer core to amend the location which is calculated by using Euler method. This only avoid the system instability but also makes the elastoplastic has the similarity of rigid body overall motion while simulating. Due to the introduction of the shape matching of stiffness, elastoplastic deformation simulation becomes fast and stable. Meanwhile, this paper analyzes and verifies the results and performance of shape matching algorithm of stiffness outer core used in mass spring, and the algorithm makes rather satisfactory simulation results.The main contributions of this thesis are mainly in the following aspects:○1 Propose a way based combined with mass-springs and rigid outer core to solution the real-time issues. ○2 Propose a way based surface mesh sampling,dynamic extension to achieve a fast simulation of soft body crack based mass-springs.