public GatedRectangleShape(int ox, int oy, int width, int height) {
super(ox, oy, width, height);
gateHolder = new GatesHolder(this);
addGate(northGate = new Gate(this, Gate.NORTH));
addGate(southGate = new Gate(this, Gate.SOUTH));
addGate(eastGate = new Gate(this, Gate.EAST));
addGate(westGate = new Gate(this, Gate.WEST));
}