A simple particle system physics engine for processing. I've designed this to be application / domain agnostic. All this is supposed to do is let you make particles, apply forces and calculate the positions of particles over time in real-time. Anything else you need to handle yourself.
K. Sugiyama. Series on software engineering and knowledge engineering ; 11 World Scientific, Singapore u.a., (2002)Kozo Sugiyama. Literaturverz. S. 203 - 212. $5GBV.
M. Goedicke, T. Meyer, and G. Taentzer. Proc. Int'l Workshop on Theory and Application of Graph Transformation (TAGT), volume 1764 of Lecture Notes in Computer Science, Springer-Verlag, (2000)