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function u(t) {
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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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remix of d/17768 by u/tomxor

function u(t) {


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  • u/tomxor
    The brush pressure is derived from velocity and direction (so more caligraphic)
  • u/BriSeven
    I love how it feels simultaneously precise and digital and messy analogue.
  • u/tomxor
    Thanks :) The dynamics can be easily tweaked too, A*.7 and B*.7 are the inertia (could interpret as how articulated the brush is) and (C-X)/9 and (S-Y)/9 are distance based attraction to pointer (could interpret as bristle length maybe?)
  • u/katkip
  • u/magna

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