Visual Python (VPython) is a 3D graphics environment very well suited for physics demonstrations. Two of the principal developers of VPython, Ruth Chabay and Bruce Sherwood have written a physics textbook, Matter & Interactions, John Wiley, 2007, illustrating the modeling of physical systems.
Examples from VPython serve as a starting point for exploring a web-based platform for multi-player games.
collide1.py, based
on a VPython example
collide2.py,
corrected for situations with relatively coarse time-sampling.
gas.py, a model of
an ideal gas with hard-sphere collisions (from VPython distribution
examples)
Maintained by John Loomis, last updated 6 April 2008