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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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  • u/metamero
    this dweet series is great
  • u/f8f82804
    thanks! I'm having a lot of fun with it. Hopefully I'll be able to fix up the distortion a little and reivist some of these ideas
  • u/f8f82804
    the distortion here is pretty bad because i'm applying the correction incorrectly! see d/11812

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  • u/f8f82804
    this dweet uses a better perspective transform based on Math.hypot -- #hypot
  • u/f8f82804
    The projection still isn't perfect, because I'm rotating the sphere's axis towards the viewer by positioning it below the camera. The resulting distortion is approximately corrected by scaling the Y coordinate with /.9.
  • u/f8f82804
    #perspective

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