dwitter.net | Renaud___ (25603)

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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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remix of d/19550 by u/tomxor

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  • Check this out
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  • u/pavel
    The default color for fill, fillRect, stroke, strokeRect is black and you need to call fillStyle or strokeStyle respectively. You must have seen other drawing techniques, maybe like putImage or using style attributes to add a filter over the B&W colors.
  • u/pavel
    Haha looks like we answered at the same time and eerily similarly.
  • u/UEZ
    Hmm, when I look to https://www.dwitter.net/d/23732 I cannot see any strokeStyle/fillStyle but the color result is greyscale.
  • u/pavel
    Gray can be achieved by spacing out black pixels amongst white ones. d/23773 shows this clearest.

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  • The book of dweet

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  • Spierpinski debris around a pulsating core #sierpinski
  • u/danny@hille.dk
    Beautiful
  • u/danny@hille.dk
    better resolution + performance for(I=new ImageData(c.width=w=175,w),i=w*w;i--;)Y=i/w/9-5,r=((X=(i%w)/10-9)*X+Y*Y+1-C(t*3))/w,I.data.set([K=T(Y/r|X/r+t*25)*Y+16/r,K/6,,255],i*4);x.putImageData(I,0,0)
  • u/jellyedwards
    Wow!

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  • u/danny@hille.dk
    Super cool - golfed a bit to center the pulsar I=new ImageData(c.width=i=W=320,h=181);for(s=I.data;i--;)for(H=h;H--;s.set([K=T(Y/r|X/r+t*9)*H+1/r/h*S(t*3)*W*H/16,K/6,,255],H*W*4+i*4))Y=1.3-H/70,r=((X=i/80-2)*X+Y*Y)/50;x.putImageData(I,0,0)
  • u/danny@hille.dk
    better version: I=new ImageData(c.width=i=W=320,h=181);for(s=I.data;i--;)for(H=h;H--;s.set([K=T(Y/r|X/r+t*9)*H+1/r/h*(1+S(t*3))*W*3,K/6,,255],H*W*4+i*4))Y=1.3-H/70,r=((X=i/80-2)*X+Y*Y)/50;x.putImageData(I,0,0)

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  • Sierpinksi inception remix

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  • Black hole in the Sierpinksi universe #sierpinksi

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  • UV emissions from the Sierpinski sphere #sierpinski

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