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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: #symmetry
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  • u/UEZ
    *understand
  • u/tomxor
    The following are equivalent when the values of w and h are between 0 and 1: fillRect(0,0,w,h) == fillRect(0,0,w*h,1). This is because the alpha channel of this pixel value is roughly proportional to the subpixel area (w*h). In terms of the patern we are trying to create, multiplication it's like the continuous version of AND, i.e the binary version is 1 IF w AND h. Additionally a lot of characters are saved when separating into w and h because we dont need to wrap the actual subexpression used to create w and h in parens and multiply them i.e fillRect(0,0,(.1+.2)*(.3+.4),1) becomes fillRect(0,0,.1+.2,.3+.4), that's -5 chars!
  • u/UEZ
    @tomxor: thx.
  • u/nystrand
    epic!

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  • Hexagons are the Bestagons

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remix of d/20416 by u/tomxor

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geb
remix of d/20532 by u/ntsutae

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remix of d/16195 by u/yonatan

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  • much faster in firefox

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  • linear motion rolling circle illusion
  • u/katkip
    #illusion
  • u/DataMeta
    nicely done
  • u/pavel
    If you delete c.width=1920 you can see only the first dot move linearly
  • u/femto113
    curves are a side effect of changing N with t, if you use a fixed value like N=16 you get straight lines

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  • Generative art by Alexander Tabakov

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