Gradient from nothing by magna

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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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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magna

function u(t) {

c.width=w=3;t?x.putImageData(new ImageData(new Uint8ClampedArray(a),w,1),0,0):a=c.toDataURL().split('').map(k=>k.charCodeAt(0)).slice(0,w*4)

Mar 1 2017 3:35 AM UTC

}// 140/140

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Gradient from nothing

u/sigveseb

Can't explain that!
u/magna

PNG header FTW
u/iverjo

Wait what? This needs an explanation :D
u/magna

@iverjo I export the empty canvas as a PNG image. The PNG file has non-zero bytes (because it needs to have a header and a bare minimum content to encode the empty content) that I directly use as RGBA values for the canvas image data (the pixel array).
u/magna

#glitch


      u(t) is called 60 times per second.
      t: elapsed time in seconds.
      c: A 1920x1080 canvas.
      x: A 2D context for that canvas.
      S: Math.sin
      C: Math.cos
      T: Math.tan
      R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)

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