JS1k, the yearly JS code golfing competition

JS1k: The JavaScript code golfing competition

2013 - Spring!

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Plasma

A classic demo scene plasma effect using floating point operations.

Author:
Tamas Kalman
Twitter:
@
GitHub:
Facebook:
Google+:
+
Reddit:
/r/
Pouet:
Website: 
dh.squidcode.com
Compo:
classic
Demo link:
https://js1k.com/2013-spring/demo/1397
Shortlink:
https://js1k.com/1397
Blog post:
please update here!
Bytes:
651
Chars:
651
Submission
ctx = a;

m = 1;
n = 1;

function loop() {
  setTimeout(function ()
  {
    for (y = 0;y < 50; y++) {
      for (x = 0;x < 200; x++) {
        r = Math.floor((Math.cos((x+n+y+Math.sin(x*10))/20)*255)+(Math.cos((x+m+y)/10)*255));
        g = Math.floor((Math.sin((x+m+y+Math.sin(y*10))/20)*255)+(Math.cos((x+n+x)/20)*255));
        b = Math.floor((Math.cos((x+Math.cos(y/(x+m))+Math.sin(y*10))/20)*255)+(Math.cos((x+n+x)/20)*255)); 
        
        ctx.fillStyle = "rgba("+r+", "+g+", "+b+",1)";
        ctx.fillRect(x*4, y*4, 4, 4);
      }
    }
    m++;
    n += 5;
    loop();
  }, 20);
}
           
loop();
Description
A classic demo scene plasma effect using floating point operations.
Base64 encoded
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Original source
Original source not submitted