CG Expression of Paper Tearing
To display the break of paper, we propose the new method for calculating transformation of paper and for representing a minute structure of paper. Paper is defined as a “spring-mass” cubic mesh model. And, to express the flow of the paper fiber, some cells of the mesh are combined to one group. By giving “spring-mass” parallelepiped covering the group, the bending stress is added to the model. For minuteness expression of paper, display data is created from the model by the following 2 steps. At first, thickness of the mesh model is compressed, then many points are added on separated edges of the mesh to display jagged shape. As the result of computer simulation in various conditions, realistic break lines of paper were represented.