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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.
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remix of d/11919 by u/mxfh

function u(t) {

}//
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  • f8f82804: yeah safari stinks
  • f8f82804: try "for(c.width|=i=384;i--;x.fillRect(960-w/2+e,4*i,w+e,4))y=i/80-2,w=y>.7?3e3:(1-y*y)**.5*640,e=T(t/9+i*w),x.fillStyle=hsl(${-y}rad 99% 50%)" which should work and is still <140
  • bekfast2390: easrdfghj

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remix of d/9772 by u/New_Core

function u(t) {

}//
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remix of d/9162 by u/f8f82804

function u(t) {

}//
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function u(t) {

}//
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  • pavel: Here is 12 characters saved: c.width^=i=0;for(y of'111121012110')x.lineTo(960+y%2*S(p=t+1.6*'123403020140'[i++])*(z=1600/(3+y%2*C(p))),y*z);x.fill('evenodd')
  • f8f82804: using 1.6 to approximate Math.PI/2 is OK, but you should change all the 4s to 0s in the second data string, just to minimze the aggregate angular error. I used 4 for clarity, because 1.57 is accurate enough that the error is hard to notice. With 1.6 you can notice that one edge is longer than the others. c.width^=i=0;for(y of'111121012110')x.lineTo(960+y%2*S(p=t+1.6*'123003020100'[i++])*(z=1600/(3+y%2*C(p))),y*z);x.fill('evenodd')

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function u(t) {

}//
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function u(t) {

}//
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  • f8f82804: this dweet uses a better perspective transform based on Math.hypot -- #hypot
  • f8f82804: The projection still isn't perfect, because I'm rotating the sphere's axis towards the viewer by positioning it below the camera. The resulting distortion is approximately corrected by scaling the Y coordinate with /.9.
  • f8f82804: #perspective

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function u(t) {

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remix of d/9161 by u/f8f82804

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function u(t) {

}//
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function u(t) {

}//
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