Javascript noise efekt
Oli vaja kodulehe taustale noise efekti.
Css3-ga saab seda ka teha, aga see kattis ainult akna kõrguse, mitte kogu body.
Lahenduse leidsin siit:
http://net.tutsplus.com/tutorials/javascript-ajax/how-to-generate-noise-with-canvas/
Kood ka:
function generateNoise(opacity) { if ( !!!document.createElement('canvas').getContext ) { return false; } var canvas = document.createElement("canvas"), ctx = canvas.getContext('2d'), x, y, number, opacity = opacity || .2; canvas.width = 45; canvas.height = 45; for ( x = 0; x < canvas.width; x++ ) { for ( y = 0; y < canvas.height; y++ ) { number = Math.floor( Math.random() * 60 ); ctx.fillStyle = "rgba(" + number + "," + number + "," + number + "," + opacity + ")"; ctx.fillRect(x, y, 1, 1); } } document.body.style.backgroundImage = "url(" + canvas.toDataURL("image/png") + ")"; } generateNoise(.1); // default opacity is .2