YIQ Color Plane
/**
* Copyright Aquioux ( http://wonderfl.net/user/Aquioux )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/3AnJ
*/
package {
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
[SWF(width = "465", height = "465", frameRate = "30", backgroundColor = "#FFFFFF")]
/**
* YIQ Color Plane
* @see http://en.wikipedia.org/wiki/YIQ
* @author YOSHIDA, Akio (Aquioux)
*/
public class Main extends Sprite {
private const SW:int = stage.stageWidth;
private const SH:int = stage.stageHeight;
private const CX:int = SW / 2;
private const CY:int = SH / 2;
public function Main() {
var bmd:BitmapData = new BitmapData(SW, SH, false);
var bm:Bitmap = new Bitmap(bmd);
for (var h:int = 0; h < SH; h++) {
for (var w:int = 0; w < SW; w++) {
var i:Number = w / CX - 1;
var q:Number = h / CY - 1;
var color:uint = yiqToRgb(0.5, i, q);
bmd.setPixel(w, h, color);
}
}
bm.scaleY = -1;
bm.y = SH;
addChild(bm);
}
private function yiqToRgb(y:Number, i:Number, q:Number):uint {
var r:Number = y + 0.9563 * i + 0.6210 * q;
var g:Number = y - 0.2721 * i - 0.6474 * q;
var b:Number = y - 1.1070 * i + 1.7046 * q;
r *= 255;
g *= 255;
b *= 255;
r >> 0;
g >> 0;
b >> 0;
if (r < 0) r = 0;
if (g < 0) g = 0;
if (b < 0) b = 0;
if (r > 255) r = 255;
if (g > 255) g = 255;
if (b > 255) b = 255;
return r << 16 | g << 8 | b;
}
}
}