One evening I got this great idea on how to simulate fire. I'm sure it's been done before, but this is what came of it. Obviously, it could use some optimization and modification, but it's not that bad when it can run fast enough (try this litte one).



Here's the sources:
FireApplet.java
Point3D.java
Particle.java
ParticleSystem.java
ParticleSystemRender.java

It's thrown togeather, kind of written for reuse but not really.