Miguel Moraleda

private function insidePolygon(pointList:Array, p:Point):Boolean
{
	var counter:int = 0;
	var i:int;
	var xinters:Number;
	var p1:PointTest;
	var p2:PointTest;
	var n:int = pointList.length;
 
	p1 = pointList[0];
	for (i = 1; i <= n; i++)
	{
		p2 = pointList[i % n];
		if (p.y > Math.min(p1.y, p2.y))
		{
			if (p.y <= Math.max(p1.y, p2.y))
			{
				if (p.x <= Math.max(p1.x, p2.x))
				{
					if (p1.y != p2.y) {
						xinters = (p.y - p1.y) * (p2.x - p1.x) / (p2.y - p1.y) + p1.x;
						if (p1.x == p2.x || p.x <= xinters)
							counter++;
					}
				}
			}
		}
		p1 = p2;
	}
	if (counter % 2 == 0)
	{
		return(false);
	}
	else
	{
		return(true);
	}
}