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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.
Theme challenge of the month: #candy
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  • The approximate orbits of the newly discovered Trappist-1 system, three of the seven planets lie in the habitable zone. The innermost planet is not shown here.
  • u/sfz
    I love these space science ones!
  • u/SpecialAgent
    The outermost planet circles the sun around every 20 Earth days, that is a very tight year!
  • u/donbright
    outstanding!

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  • A pseudo-random number generator. The parameters you see is used in glibc, it gives a good visual on distribution. If you changed m=0x80000000 (m as used in IBM's C/C++) you will quickly see a bias in the randomness. Oh the irony! Here are some other popular parameters you can try: Borland C/C++: a=22695477,c=1,m=0x100000000 Turbo Pascal: a=134775813,c=1,m=0x100000000 Visual Basic 6: a=1140671485,c=12820163,m=0x1000000 Java: a=25214903917,c=11,m=0x1000000000000 Many more: #Parameters_in_common_use" rel="nofollow">https://en.wikipedia.org/wiki/Linear_congrue… 🕶

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  • Illustrates the orbits of the first 4 planets in our solar system. The distance from the sun (not shown but expected in the center) and the orbital periods are to approximate scale. Variable A holds the planetary data, positions 0-3 indicate the distance in Astronomical Units from the sun, positions 4-7 the number of days for orbital periods. These are rounded to fit into the 140 byte limit. Earth should be 3.65, but is rounded up to 4. Not perfect but a close approximation. q is the radius of each orbit (derived from the AU distance), and d is the angle of the planet on the orbital path (derived from the days per orbital period).

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  • give it a minute to warm up :)

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  • Old school plasma effect

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  • u/iverjo
    Some interesting moirè patterns there
  • u/donbright
    resembles 'circles and squares' fractal a little bit

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  • Just messing around
  • u/5Mixer
    Nice, looks super smooth, like paint. I need to mess around with not clearing the screen more :)

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