Particle Simulation Applet

This program uses a dynamic model (with acceleration) to simulate multiple, independent particles.

Command	Description
]	Increases simulation speed (use this if applet runs too slowly).
[	Decreases simulation speed.
Left-click	Makes all particle move towrds mouse position. (Shift: Move away).
a	Attracts all particle to mouse position (toggles). (Shift: Repels).
t	Makes all particle turn about mouse position. (Shift: Clockwise).
g	Toggles downwards gravity.
b	Forms/enlarges "bubble" around mouse (Shift: Resets).
r	Randomizes velocity.
f	Freezes all particle (sets velocities to 0).
Up arrow	Makes all particle move faster.
Down arrow	Makes all particle move slower.
-	Reverses particle velocity.
v	Evenly distributes particle speed. (Shift: Velocity).
d	Increases damping (Shift: Resets).
o	Changes particle colouring mode (direction/random).
l	Changes particle display mode (rectangle/line).
w	Changes wall geometry (rectangular/wrap-around/circle).
p	Pauses (toggles).
Esc	Resets position and randomizes velocity.

Strengths of force from the mouse pointer are inversely proportional to distance.
Try "addddd" to have particles swarm and follow mouse cursor.
Try "a" followed by alternating "v" and down-arrow to see particles form orbit around cursor.
Faster way to form orbit (in one direction): "a" followed by "t"'s.