A Hue / Saturation compatable ColorMatrixFilter. My only requirements are that you inform me of what you intend to do with it, Its nice to hear what my hard work is being used in 
Version 1.0.0: Basic Implementation. - To my surprise I found I was unable to extend the ColorMatrixClass. Not quite sure why it is like this, The problem is solved by giving the Filter getter.
Version 2.0.0: Dramatic Speed increase. - Removed excess array calls, optimized generally.
Version 2.0.1: Portability update. - Removed dependencies on other classes.
EDIT
Updated new version
Can also be seen at:
http://blog.matt-lloyd.com/2007/07/hue-color-matrix-filter/
A revised edition of this class has been published in [FONT=Arial][SIZE=2]Foundation Flash CS3 Video[/SIZE][/FONT] by Friends of ED. Go Buy it!
/**
Hue ColorMatrixFilter
version 2.0.1
Created by Matthew Lloyd
http://blog.matt-lloyd.com/
Matt.Lloyd101@gmail.com
This is release under a Creative Commons license.
More information can be found here:
http://creativecommons.org/licenses/by-nc-sa/2.0/uk/
----------------------------------------------------------------
@codehint Gives you a way to change the Hue and Saturation
on DisplayObjects.
@example
import com.deviant.HueColorMatrixFilter;
import flash.events.*;
var HCMF = new HueColorMatrixFilter();
var H = 0;
var I = 0;
clip.addEventListener(Event.ENTER_FRAME, oEF);
function oEF(e:Event)
{
HCMF.reset();
HCMF.Hue = H++;
I += Math.PI/360;
HCMF.Saturation = Math.sin(I);
clip.filters = [HCMF.Filter];
}
*/
package com.deviant
{
import flash.filters.ColorMatrixFilter;
public class HueColorMatrixFilter
{
private var matrix:Array;
public function HueColorMatrixFilter()
{
Identity();
}
private function Identity():void
{
matrix = [ 1, 0, 0, 0, 0,
0, 1, 0, 0, 0,
0, 0, 1, 0, 0,
0, 0, 0, 1, 0 ];
}
public function reset():void
{
Identity();
}
public function set Saturation(saturation:Number):void
{
saturation = (saturation > 1)?1:(saturation < 0)?0:saturation;
var M1:Array = [ 0.213, 0.715, 0.072,
0.213, 0.715, 0.072,
0.213, 0.715, 0.072];
var M2:Array = [ 0.787, -0.715, -0.072,
-0.212, 0.285, -0.072,
-0.213, -0.715, 0.928];
var M3:Array = add(M1, multiply(saturation, M2));
concat([ M3[0], M3[1], M3[2], 0, 0,
M3[3], M3[4], M3[5], 0, 0,
M3[6], M3[7], M3[8], 0, 0,
0, 0, 0, 1, 0]);
}
private var _h:Number = 0;
public function set Hue(hue:Number):void
{
_h = hue;
// convert from Rad to Degrees
hue = _h*0.0174532925;
var M1:Array = [ 0.213, 0.715, 0.072,
0.213, 0.715, 0.072,
0.213, 0.715, 0.072];
var M2:Array = [ 0.787, -0.715, -0.072,
-0.212, 0.285, -0.072,
-0.213, -0.715, 0.928];
var M3:Array = [ -0.213, -0.715, 0.928,
0.143, 0.140, -0.283,
-0.787, 0.715, 0.072];
var M4:Array = add(M1, add(multiply(Math.cos(hue), M2), multiply(Math.sin(hue), M3)));
concat([ M4[0], M4[1], M4[2], 0, 0,
M4[3], M4[4], M4[5], 0, 0,
M4[6], M4[7], M4[8], 0, 0,
0, 0, 0, 1, 0]);
}
public function get Hue():Number
{
return _h;
}
private function add(A:Array, B:Array):Array
{
var C:Array = [];
for(var i:uint=0; i<A.length; i++)
{
C.push( A* + B* );
}
return C;
}
private function multiply(x:Number, B:Array):Array
{
var A:Array = [];
for each(var n:Number in B)
{
if(n == 0)
A.push(0);
else
A.push(x * n);
}
return A;
}
private function concat(B:Array):void
{
var nM:Array = [];
var A:Array = matrix;
nM[0] = (A[0] * B[0]) + (A[1] * B[5]) + (A[2] * B[10]);
nM[1] = (A[0] * B[1]) + (A[1] * B[6]) + (A[2] * B[11]);
nM[2] = (A[0] * B[2]) + (A[1] * B[7]) + (A[2] * B[12]);
nM[3] = 0;
nM[4] = 0;
nM[5] = (A[5] * B[0]) + (A[6] * B[5]) + (A[7] * B[10]);
nM[6] = (A[5] * B[1]) + (A[6] * B[6]) + (A[7] * B[11]);
nM[7] = (A[5] * B[2]) + (A[6] * B[7]) + (A[7] * B[12]);
nM[8] = 0;
nM[9] = 0;
nM[10] = (A[10] * B[0]) + (A[11] * B[5]) + (A[12] * B[10]);
nM[11] = (A[10] * B[1]) + (A[11] * B[6]) + (A[12] * B[11]);
nM[12] = (A[10] * B[2]) + (A[11] * B[7]) + (A[12] * B[12]);
nM[13] = 0;
nM[14] = 0;
nM[15] = 0;
nM[16] = 0;
nM[17] = 0;
nM[18] = 1;
nM[19] = 0;
matrix = nM;
}
public function get Filter():ColorMatrixFilter
{
return new ColorMatrixFilter(matrix);
}
}
}
