On the precision and efficiency of hierarchical rheology MSD model

In this paper, we model a rheology object whose main characteristic is the existence of residual displacement. In order to speed up calculation, to keep the stability, and also to control the residual replacement, we adopt MSD (Mass-Spring- Damper) voxel-lattice model and calibrate their physical parameters by using differences against experimentally captured shapes. In general, a human operator manipulates the MSD model by the most popular graphics software OpenGL and force feedback device PHANTOM in a 3-D CG environment. In order to get wonderful visual and tactile realities, we need force and shape calculations less than a couple of 10 milli-seconds. For saving computational cost, we propose the octree-based MSD model. Based on several experimental and comparative results, we check whether twin goals such as efficiency of calculation time and precision of shape deformation are compatible or not in the octree-based MSD model.