| The simulation and control of natural phenomena is an important area of computer graphics that has applications in animation and interactive entertainment. We present a novel method of replicating the physical behaviour of wispy smoke using a computational simulation of the evolution of a vorticity field. We represent this field compactly as multi-resolution closed curves we call filaments. We extend the applicability of our technique with new artistic control mechanisms that operate on filaments. Using these controls, an animator can manipulate the underlying flow fields. Unlike previous techniques, our control framework allows an artist to visualize the effects of different control layouts interactively. We also present a real-time rendering algorithm and shading model for the particles used to represent the smoke in an animation. |
