public boolean contains(Point3f p) {
		if (p == null)
			return false;
		if (Math.abs(p.x) > forceCalculator.xbox)
			return false;
		if (Math.abs(p.y) > forceCalculator.ybox)
			return false;
		if (Math.abs(p.z) > forceCalculator.zbox)
			return false;
		return true;
	}