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  1.    #1  
    Grav is a gravity simulation app that let's you explore the fundamental force that shapes our Universe on your Pre or Pixi. Click here for more information or to download.

    Changelog:
    • 0.1.0 - initial release
    • 0.2.0
      • Added support for rotating reference frames
      • Added Sun-Jupiter system to explore horseshoe orbits in a rotating frame
      • Added on-screen controls - pause/resume simulation and toggle simulation settings with their respective buttons
      • Added dragging support - drag on the screen to move in space
      • Fixes to how new bodies are added when tapping on the screen

    Technical Details

    Grav originally started as a web app I made to learn more about Canvas, physics, and numerical integrators. Grav uses a fourth-order Runge-Kutta integrator to integrate the equations of motion for the n-body problem, and implements very basic collision detection and response algorithms.

    All source for both the web version of Grav and the webOS version of Grav can be found here: rsanchez1's Grav at master - GitHub

    Grav was also submitted as GraviScript to the 10K Apart competition, which can be found here: 10K Apart | Inspire the web with just 10K.
    Last edited by rsanchez1; 02/07/2011 at 02:39 PM.
  2.    #2  
    Ok, it's up now. If you have any requests or suggestions, post them here. I've been working on implementing rotating reference frames to explore horseshoe orbits and that update will probably be up later this week.

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