NetLogo Models Library:
Note: If you download the NetLogo application, every model in the Models Library is included.
This is an example that displays many of the capabilities of NetLogo 3D.
The SETUP button creates BALL-COUNT balls poised above the "floor" of the world. GO releases the balls and "gravity" pulls them down. The balls will bounce until they lose momentum. If the COLOR-SPEED? switch is on the color of the ball will be scaled the speed it is moving. If the TAILS? switch is on the balls will leave a trace of the path they have taken.