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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/cantelope
    neat
  • u/lewdev
    What the heck is perspective? This is so cool! I changed its value to 30vw which made the effect a lot more dramatic 😁

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  • u/danny@hille.dk
    This is a personal thing!!! Twister2d is one of my favorite old school effects, it's also one of the first things i tried to golf to fit into a dweet (and I failed miserably :-)) I have retried tried (and failed) a couple of times, but this is the first time i actually managed to get the damn thing to fit without compression. I had to scarifice colors to maintin an interesting animation. Perhaps I'll get it next time :-) #twister #twister2d
  • u/New_Core
    it look great...
  • u/DataMeta
    beautiful #grayscale

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  • Nothing new, it has all been done before. I just had to try again :-) #twister for(TW=I=>S(t*3+r+I*1.6)*60,c.width=y=700;d=TW(r=y/255),y-=2;)for(i=4;n=TW(i),m=TW(i+1),b=255*(m-n)/70,x.fillStyle=R(i%2?0:b,0,i%2&&b),i--;)n<m&&x.fillRect(n+d+350,y,m-n,2)

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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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  • Embossed spinner

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  • almost happy with this :-/

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