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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.
Theme challenge of the month: #blacklivesmatter

function u(t) {

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  • u/tomxor
    #crt ? I don't even see the code any more... all I see is trinitron, triad, inline mask...

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function u(t) {

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  • VintageTerminal

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remix of d/13321 by u/vinca

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  • u/tomxor
    Finally resorted to UTF8. This is a reasonably accurate slow motion aperture grille scanline animation... Although if run very slow you will see it's not simulating 3 electron beams. t=fps (scanline) w=width (subpixels) the later must be a multiple of 3 and 5. Use X, Y and floored F to plugin your own fractal!
  • u/tomxor
    Uncompressed: w=90,i=l=w*w/5,t=1+t*t/12; for(x.fillRect(0,0,c.width=w*2,w*2);i--;x.fillRect(X*6,Y*6,1+K,5)) X=i%w/3,Y=i/w|0,F=t-i/l,K=1-F%1,K*=(Y^X-~F)/27%1+K**8, x.fillStyle=hsl(${i*120},99%,${K*99}%)
  • u/sigveseb
    Kick-ass!
  • u/C010011012
    bypassing the character limit I see using unicode escapements and regex u r very clever

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remix of d/7512 by u/magna

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  • u/tomxor
    Hah, it fits! awesome
  • u/tomxor
    #crt #fractal
  • u/magna
    It's monochrome, unfortunately. I couldn't find a quick way to add color (i.e. adjust the intensity based on R/G/B cells.)
  • u/tomxor
    I can sort of fudge the colour with some kind of mod3 to selectively modulate the intensity in lum: (2+i%3)*n*10%50 duno how to fit it though.
  • u/magna
    Nice! I used the dweet compressor (d/9207) to compress it: d/10843

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  • u/magna
    Here we go: d/10843
  • u/C010011012
    is it a cellular automata?
  • u/tomxor
    Yes and no, it's a fractal n=T(0|(i/w+f^f-i/w)/(t**.7+6)) which is just a more elaborate variation of serpinsky triangles to produce more interesting patterns. Some fractals are automata, but not all automata are fractals, see here: https://en.wikipedia.org/wiki/Rule_90
  • u/tomxor
    The implication is serpinsky triangles are computationally reducable, meaning it does not have to be computed in the same way as a cellular automata i.e state can be computed at step t directly without traversing intermidiate steps.

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remix of d/7512 by u/magna

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remix of d/7511 by u/magna

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remix of d/7510 by u/magna

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