dwitter.net | #dithering

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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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remix of d/9542 by u/f8f82804

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  • f8f82804: the palette that's being rendered in 4 colors: for(z=i=64;i--;)for(j=z;j--;x.fillRect(16*i+448,16*j,16,16))x.fillStyle=R(i*4,j*4,255)

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remix of d/9570 by u/f8f82804

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  • joeytwiddle: Very clever mini dithers! How about dithering a sphere?
  • f8f82804: A sphere is a good idea! I'm still trying to work on spatial coherence though; see my earlier Floyd-Steinberg demo to get an idea of what's possible with 2d error diffusion. This dweet is a start at using a mask instead of diffusing errors.

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remix of d/9568 by u/f8f82804

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remix of d/9542 by u/f8f82804

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  • f8f82804: 2D palette and approximation with 4 color #dithering; 1D error diffusion gives different patterns for vertical gradients (red channel) and horizonal (blue channel) #slow #waitforit

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remix of [deleted]

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  • f8f82804: 2D palette rendered with 4 colors via error diffusion dithering

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remix of d/9489 by u/f8f82804

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  • f8f82804: e=[];for(a=60;a--;)for(b=s=34,E=e[b-1]|0;b--;x.fillRect(s*a,b*s,s,s))p=99+a*b*S(t)/2+E,x.fillStyle=R(q=s*(p/s|0),q/7,q/2),E=e[b-1]|0,c=p-q,e[b-1]=c/=16,e[b]+=c*5,e[b+1]+=c*3,E+=c*7

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remix of [deleted]

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  • FireFly: Raycasted rotating sphere with UV-mapping!

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