To use interactive features, click on the applet first:

• up arrow adds a particle
• down arrow deletes one
• 'i' re-initializes
• 'l' takes you from "circle mode" to "line mode" (hard to see in simulation mode)
• 'c' takes you from "line mode" to "circle mode"
• 'v' toggles between "visualization mode" and "simulation mode" (the default)
• '/' divides the gravitational constant in half
• '*' multiplies it by 2
• '-' subtracts a little something from it, and '+' adds
• If you're quick, you can grab a particle with the mouse!
• To stop (or start back up) all motion, try ctrl-left-click.

Source code: Gravity Body NVector

Built with Processing