A Fast Refraction Method of an Object Floating on the Water

Abstract

There are two major refraction methods of an object that is in the water: ray tracing and refraction mapping. Ray tracing method can represent precise refraction, but needs heavy calculation time. On the other hand, refraction mapping method is faster than ray tracing because it prepares images of the surrounding environment and maps the images on CG models considering refraction of light, however, real-time refraction is difficult for the case of dynamic change. Therefore, we propose a fast refraction method of an object floating on the water by performing refraction calculation, which is based on snell's law, only for vertices constructing the object and by interpolating between these vertices.