This one mostly was created out of boredome. Some days ago I sat in front of my PC and somewhere saw a picture of a Newton's cradle and thought "why not try to build such a thing using Newton?" and so I did. Here is the end result (click for bigger shot) :
Download it here (ZIP, ~1 MByte)
Basic usage :
As in most of my other demos you can pick and drag around the balls using and holding down the left mouse button. So pick one of the balls and try to "throw" him out of the case and then let if fall down onto the other balls.
Thr right button (when hold down) is used to rotate the scene, mouse wheel zooms in and out.
If you don't move the mouse for ~2 seconds, the cursor dissapears and the scene starts to rotate. So if you just want to watch the physics, speed up some (or one) balls(s) and don't move the mouse for 2 seconds.
Pressing Escape quits the demo. For more info please see the readme.
Please also note that the stencil shadows slow the demo down very hard, so if it's too slow press 's' to disable the shadows.
P.S. : The newton's cradle is not 100% perfect, nor is it as effective (the balls slow down too fast I think) as one of those real things (sadly I have no real Newton's cradle). So if someone thinks he knows how to make it better, just post your hints.