Gravity4, an orbit simulator:
-
The origin (x=0,y=0) is in the center of the screen.
Choose x- and y- coordinates in the range +/-100 or the masses will go
off screen.
-
Keep masses in the range 0.01 to 500. Keep initial
speed in the range 0 to 3.
-
Other than that... play!
Download the Orbit Simulator Gravity4!
If you want to alter this program, you can see the QuickBasic
source code for Gravity4. You will need a QuickBasic or VisualBasic
compiler to work with the code.