Particle Systems ..

Hiya All.. I''m looking for references &/or code on the web that I can look at to get ideas for particle systems. Specifically, I''m interested in various implementations of: (1) Particle Movement/Update Algorithms (2) Particle Colors over their life-span It can be for any particle system; explosion modelling, tornado''s, or what have you. I''m building a simple windows GDI application in VC++ 6 that demonstrates each particle system I''m coding. At the moment, I only have one particle system which was mainly copied from Scott Kessler''s implementation -- at http://dman.simplenet.com/particle.html These particle systems are demo''s and I plan to make them freely available [with source, of course.] Thanks, // CHRIS