hsl has harsh linear transitions. i've … by BriSeven

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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BriSeven

remix of d/578 by u/New_Core

function u(t) {

if(t<13)d=0.5,m=127,x.fillStyle=R(C(t*d)*m+m,S(t*d-d)*m+m,S(-t*d-d)*m+m),x.fillRect(t*150,0,4,2e3);else x.drawImage(c,a=C(t),0,1920,1050)

Jan 3 2017 1:21 AM UTC

}// 137/140

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hsl has harsh linear transitions. i've swapped in smooth gliding sinewave transitions

Show more comments…
u/iverjo

Smooth indeed
u/iverjo

127 characters: m=127;t<13?(x.fillStyle=R(C(t/2)*m+m,S(t/2-.5)*m+m,S(-t/2-.5)*m+m),x.fillRect(t*150,0,4,2e3)):x.drawImage(c,a=C(t),0,1920,1050)
u/iverjo

125 characters: m=127;t<13?(x.fillStyle=R(C(h=t/2)*m+m,S(h-.5)*m+m,S(-h-.5)*m+m),x.fillRect(t*150,0,4,2e3)):x.drawImage(c,a=C(t),0,1920,1050)
u/iverjo

123 characters: m=127;x.fillStyle=R(C(h=t/2)*m+m,S(h-.5)*m+m,S(-h-.5)*m+m);t<13?x.fillRect(t*150,0,4,2e3):x.drawImage(c,a=C(t),0,1920,1050)
u/New_Core

121 I guess as a= is not needed anymore ;)
u/iverjo

121 characters: m=127;x.fillStyle=R(C(h=t/2)*m+m,S(h-.5)*m+m,S(-h-.5)*m+m);t<13?x.fillRect(t*150,0,4,2e3):x.drawImage(c,C(t),0,1920,1050)
u/BriSeven

119 with a compromise on the constant m=127;x.fillStyle=R(C(h=t/2)*m+m,S(h-.5)*m+m,S(-h-.5)*m+m);t<15?x.fillRect(t*m,0,4,2e3):x.drawImage(c,C(t),0,1920,1050)
u/New_Core

114 if we skip the prepaint wait. m=127;x.fillStyle=R(C(h=t/2)*m+m,S(h-.5)*m+m,S(-h-.5)*m+m);x.fillRect(t*m,0,4,2e3);x.drawImage(c,C(t),0,1920,1050)
u/New_Core

and last number should be like 1060 for a bit more distortion
u/iverjo

For some extra swaying movement, replace C(t) with 2*C(t)


      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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