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u(t) is called 60 times per second. t: Elapsed time in seconds. S: Shorthand for Math.sin. C: Shorthand for Math.cos. T: Shorthand for Math.tan. R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5) c: A 1920x1080 canvas. x: A 2D context for that canvas.
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  • katkip: To decompress, add ;throw m before //
  • katkip: To decompress, add ;throw m before //

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  • tomxor: Perfect collision integration, since uniform gravity is constant it should cancel out in such a simple case, in which case integration can be skipped on a collision interval ?-b:b+.3 this is why it doesn't loose or gain significant hight on average
  • tomxor: To make it absolutely perfect this can also be changed to ?-b:b+.25 which will eliminate integration error since .25 is a non periodic binary fraction... it will bounce forever :)
  • tomxor: ... but that would cost an extra byte so its no good !

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remix of d/14376 by u/pavel

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