By Slowchop Studios
Open the Mac App Store to buy and download apps.
Gravit is visually stunning gravity simulator, where you can spend many hours of fun and experimentation. It simulates the N-body problem using the Barnes-Hut Algorithm.
** NOTE ** There is a bug with the keyboard controls. You must hold down the "fn" key when pressing the function keys (F1-F12). Press:
- fn-F8 to start a new simulation
- fn-F6 to start recording
This will be fixed very soon, with on-screen buttons.
Many features including:
- It looks pretty and is easy to use.
- View the simulation in 3D using stereoscopic imaging!
- You can record, then play back at any speed
- Stores every particle's position for every frame in memory
- Compresses history when needed, for very long recordings
- Mouse controllable rotation
- Colours can be based on mass, velocity, acceleration, momentum or kinetic energy
- See an octtree being created in real-time
- Save/Load functionality
- Update display/input while recording a frame
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 let's 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!
On the next update make a TOOL/CONTROL box in the bottom left corner, replacing the random feed. In this box, you can customize anything you want to do (with buttons and sliders) to make a colorful and elaborate simulation, which is a lot easier than memorizing the controls on the keyboard.
I gave you 5 stars, so just make it easier to control the things.
there should be a mode similar to Spawn Glow, which is free for iPhone.
just read the controls that maria (below) laid out or press keys and it will tell you what you are doing. the physics are jaw dropping if you find a nice combination if settings. Great fun to play around with and show off to people. Worth the money.
Note: I did have one problem where I increased the tail smoothness ( </> ) as far as it would go and the app froze on me. But it has never happened since. Even when I replicated it.