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Bouncy Code!

Download to try this out yourself here.

Try our new space heater application! Run it and it will turn your computer into a nice toasty space heater!

Some fun things to try out:

  • Turn off gravity, turn on "random start force" and press the large explosion button and watch everything turn into chaos!
  • Enter -1 as the density then press "Add Circle" and watch negative mass physics work its magic!
  • Press party to break your machine!
  • Press the small explosion between the trash can and large explosion icon to simulate particles!
  • Tweak settings around:
    • Friction should be (0, 1) but what if you increased it?
    • Resitution should be (2, 3) but what if you increased it?
  • Try moving bodies around while the simulation is running!

Its not a bug, its an undocumented feature!

  • Polygons with flat geometry WILL CAUSE HAVOC. They will bounce around and teleport.
    • We know this is an issue. The reason is because we use a cheap collision resolution technique called MPR (Minkowski Portal Refinement) instead of the traditional GJK algorithm. We got lazy and used MPR to identify "collision points" (instead of using a proper algorithm). This is very inaccurate and will result in the behaviour seen.
  • Fast moving objects will pass through walls and disappear.
    • This issue can be solved with a CCD (continuous collision detector). They are not trivial to write. Just deal with it.

Thanks to the amazing team for their hard work! Here's a screenie:

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Grade 12 ICS OOP project/crapfest

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