Abstract
Visual simulation of natural phenomena is one of the most important research fields in 3DCG. Many methods were developed for representing natural phenomena. These methods are used in many fields such as education and industry. We focus on aurora which is light emission phenomena and appears the sky of Polar Regions. Visual simulation of aurora generates dynamic animations by using feature of aurora such as form and motion and colors and generating mechanism. We propose a new approach for simulating and rendering aurora. The proposed method can reproduce motion of aurora, which render the various aurora emission colors. Our method reproduces motion of aurora by simulating the movements of charged particles. In this paper, we use a square grid for simulating the electromagnetic field, which calculates forces acting on the charged particles by simulating the electromagnetic field. The particle positions are iteratively updated, and the grid size is also updated after every iteration so that all the particles are always within the region of the grid. The proposed method reproduces the various aurora emission colors by simulation of the emission process and the light attenuation. Our experimental results indicate the effectiveness of the proposed system.
