On Jul 15, 2008, at 2:41 PM, Edward Cherlin wrote: > On Sat, Jul 12, 2008 at 1:21 PM, Yoshiki Ohshima <[EMAIL PROTECTED]> > wrote: >> >> But if you put a circle on >> the floor (stand still), and make another hit from the side, the >> momentum is shared by these two circles and both of them move >> together >> at the same speed. > > That's unphysical, and I would only program that way in a fantasy > setting. ...
Most real-time physics simulation code was designed for use in a fantasy setting, specifically video games. Box2D is no exception. These simulations have traded lots of accuracy for real-time interactivity. That doesn't mean that it is pointless to use as a teaching aide, just that (in)accuracy of simulation needs to be part of the lesson plan. To see an example of this yourself go here: http://box2d-js.sourceforge.net/ Then right-click on the simulation twice to get to the Newton's Cradle example. -josh _______________________________________________ Sugar mailing list [email protected] http://lists.laptop.org/listinfo/sugar
