Physics engine is a module of computer programs that automatically calculates motions of passive objects (ex. hairs), and is an indispensable tool for making 3DCG movies (ex. feature films, games) these days.
Traditional 2D-style animations (especially in Japanese Anime), however, are known to have much many "improper" stylizations for re-producing them using 3DCG techniques. That is, existing physics engines, most of which are aimed at only physical and 3-dimensional accuracy, are not suitable for generating 2D-like stylizations.
In order to solve this problem, we developed a new algorithm of deforming physical laws according to the viewing direction. We believe our physics engine would be useful for artists to re-produce 2D-like stylizations in their 3DCG animations.
