A Fire Model for 2-D Computer Animation

In this paper we present a model for fire in 2-D animation. Here the emphasis is on a stylistic representation of fires and the flames which arise from the bodies of such fires. We show how to devise a skeleton framework for generating animation sequences which match the hand-drawn series, and in particular how to match the flame orientations, shapes, and the connection curves, as required by the simulated style, between them. The parameters associated with these skeletons, flame types and connection curves are brought together into a matrix tableau for the particular representation of the fire base in the model. The model for the flames at the top of the fire are made up from of three simple sub-models. By stochastically varying the parameters the model can generate plausible looking sequences of animated fire and include the effects of wind straightforwardly.