I am looking into using Java to be able to model/simulate (MODSIM) discrete and continuous systems in the areas of traffic modeling, birth/death process, spread of disease etc. I have a working knowledge of Java. I have a good grasp of calculus and differential equations.
I am looking for a MODSIM software that is:
a)Free and Java based
b)Does most of the graphics/animation and allows for 3D Visualization
c)Allows for Java Extensions