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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: #time
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  • Flare

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  • an attempt at something like a twister
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  • u/joeytwiddle
    That's a very juicy #twister!
  • u/cyhawk
    I teach 9-year-olds programming and used a tidied up version of this to show them how to figure out how something works. They loved it! Thanks! I've added a bit of gap between the strands to make it easier to understand, and I think it looks good. Like Math.max(180*S(a-1.2),0).
  • u/rnbw
    wow, i would have never thought that my recreational programming would be used for educational purposes. glad i was able to help those kids out on their journeys!
  • u/danny@hille.dk
    Just saw this, nice code man! Save 11 b like this: for(c.width=i=300;i--;)for(j=8;j--;x.fillStyle=#f+j*15)x.fillRect(i,99-S(a=t-i/80*C(t+i/99)+j*.9)*40,1,Math.max(40*S(a-1.1),0))

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  • Kraftwerk's Antenna with city skyline. 📡

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remix of d/13601 by u/pavel

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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/11885 by u/katkip

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  • It is going up. To go down, change seed=0.02

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  • Ribbon Christmas Tree

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  • Highway at night #bokeh
  • u/lionleaf
    I like it! #traffic
  • u/magna
    2 chars shorter, yellow headlights: with(x)for(i=fillRect(0,0,c.width=w=255,w)|99;i--;fill(arc((t*b+i)*i%w,99+b,5+b/5,!beginPath(),7)))b=i&1?1:-1,fillStyle=R(w,b*w,b*w*.8,.2)
  • u/aleamb
    absolutely beautiful, magna
  • u/joeytwiddle
    Love it. Reminds me of Mercury - The Timeless. Would be great to get some z-axis going.
  • u/magna
    Thanks folks!

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  • Remote Islands

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