button: info

package example.button
{
    import nape.constraint.LineJoint;
    import nape.phys.Body;
    import nape.phys.Compound;

    /**
     * ...
     * @author liu wong
     *
     */

    public class buttonInfo
    {
        private static const delta:Number = 0.75;
        private static const delta2:Number = 0.25;

        public var compound:Compound;

        public var mainBody:Body;
        public var secondBody:Body;

        public var len1:Number;
        public var len2:Number;

        public var trigger:Boolean = false;

        public var counterOn:int = 0;
        public var counterOff:int = 0;

        public var onTrigger:Function = null;

        public var id:int = 0;

        public function buttonInfo(c:Compound, a:Body, b:Body, l:Number):void
        {
            compound = c;
            mainBody = a;
            secondBody = b;
            len1 = l * delta;
            len2 = l * delta2;
        }

        public function update():void
        {
            var l:Number = mainBody.position.sub(secondBody.position).length;

            if (trigger == false)
            {
                if (l <= len2)
                {
                    trigger = true;

                    counterOn++;

                    if (onTrigger != null)
                        onTrigger(this, true);
                }
            }
            else
            {
                if (l >= len1)
                {
                    trigger = false;

                    counterOff++;

                    if (onTrigger != null)
                        onTrigger(this, false);
                }
            }
        }

        public function free():void
        {
            compound.space = null;

            mainBody = null;
            secondBody = null;
        }
    }

}