Gradient.as

package com.aberustudios.afrosuit.visual
{
    import flash.display.BitmapData;
    import flash.display.GradientType;
    import flash.display.Graphics;
    import flash.display.Sprite;
    import flash.geom.Matrix;

    import net.flashpunk.FP;

    public class Gradient extends BitmapData
    {
        public function Gradient(width:int, height:int, colorA:uint = 0xFFFFFF, colorB:uint = 0x000000, angle:Number = 90)
        {
            super(width, height, true, 0x00000000);

            m.createGradientBox(width, height, angle * (-FP.RAD));
            g.beginGradientFill(GradientType.LINEAR, [colorA, colorB], [1, 1], [0, 255], m);
            g.drawRect(0, 0, width, height);

            draw(s);
        }

        public function updateGradient(colorA:uint = 0xFFFFFF, colorB:uint = 0x000000):void
        {
            g.clear();
            g.beginGradientFill(GradientType.LINEAR, [colorA, colorB], [1, 1], [0, 255], m);
            g.drawRect(0, 0, width, height);

            draw(s);
        }

        private var s:Sprite = new Sprite;
        private var g:Graphics = s.graphics;
        private var m:Matrix = new Matrix;
    }
}