Very Cool Simulation App

Although when you first launch it, you may not understand what exactly is going on, try pressing random keys on the keyboard, and the status message on the left lets you know what you are doing. The stereo-imaging mode (press s) is my favorite by far - it lets you see these images in 3D by looking at the screen in a cross-eyed fashion! Here are some more shortcuts:

(fn)-F8 - New simulation
(fn)-F6 - Start/Pause the simulation
(fn)-F5 - Playback the simulation from the beginning
A / Z - Zoom in and out
S - Stereo-image mode
D / F - Sterio-image depth
B / N - Tail length
M - Infinite tail length
< / > - Tail smoothness
– / + - Particle Size
[ / ] - Max particle size (when zoomed in)
T - Draw Tree setting (??)
O - Show/hide screen text
- Particle rendering mode
L - Blend mode
; / - Tail size
X - Toogle fadded tail
C / V - Tail opacity
/ - Color mode
` - Command prompt
Q / W - Frame skipping

In any case, a very cool app!

Dimitri Bouniol about Gravit