ColorCal.as

package {
	public class ColorCal {
		//HSB(HSV) to RGB function
		public static function HSB2RGB(h:int,s:int,b:int):uint {
			if (h>=360) {
				h=0;
			}
			var H:Number=h/60,S:Number=s/100;
			var lH:int=H;
			var F:Number=H-lH,B:Number=b/100;
			var P:Number = B*(1 - S),Q:Number = B*(1 - S*F);
			var T:Number = B*(1 - S*(1 - F));
			var r:int,b:int,g:int;
			switch (lH) {
				case 0 :
					r=B*255;
					g=T*255;
					b=P*255;
					break;
				case 1 :
					r=Q*255;
					g=B*255;
					b=P*255;
					break;
				case 2 :
					r=P*255;
					g=B*255;
					b=T*255;
					break;
				case 3 :
					r=P*255;
					g=Q*255;
					b=B*255;
					break;
				case 4 :
					r=T*255;
					g=P*255;
					b=B*255;
					break;
				case 5 :
					r=B*255;
					g=P*255;
					b=Q*255;
					break;
			}
			return (r<<16)+(g<<8)+b;
		}
		//RGB to HSV
		public static function RGB2HSB(color:uint):Array {
			var r:int=color>>16;
			var g:int=(color>>8)&0xFF;
			var b:int=color&0xFF;
			var max:int=Math.max(r,Math.max(g,b));
			var min:int=Math.min(r,Math.min(g,b));
			var delta:int=(max-min);
			var H:int;
			if (r==max) {
				H=(6+ (g-b)/delta)*60;
			} else if (g==max) {
				H=(2+ (b-r)/delta)*60;
			} else {
				H=(4+ (r-g)/delta)*60;
			}
			if (H>360) H-=360;
			var S:int=max>0?(delta*100/max):0;
			var B:int=(max*100/255);
			return [H,S,B];
		}
	}
}