Red pixel interaction by rodrigo.siqueira

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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rodrigo.siqueira

remix of d/27135 by u/danny@hille.dk

function u(t) {

for(x.fillRect(0,0,i=2e3,i*!t);i--;x.fillStyle=R(235-k*62))I=i%2e3,X=I/28|0,k=S(i*i+t)*2+2|0,x.fillRect(X*37,I%28*39,30,30)

Mar 2 2023 12:25 PM UTC

}// 123/140

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Red pixel interaction

u/rodrigo.siqueira

Two code golf tricks here: x.fillRect(0,0,i=2e3,i*!t)
u/danny@hille.dk

nice trick i*!t!!!! - slight golf: 111b for(x.fillRect(0,0,i=2e3,i*!t);i--;x.fillStyle=R(235-(S(i*i+t)*2+2|0)*62))x.fillRect(37*(i/28|0),i%28*39,30,30)


      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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