private void drawVisionArea(Graphics2D g2d) {
		int xCenter = (int) (getX() + (getImage().getWidth() / 2));
		int yCenter = (int) (getY() + (getImage().getHeight() / 2));
		g2d.drawOval((int) (xCenter - getVisionRadius()),
				(int) (yCenter - getVisionRadius()),
				(int) getVisionRadius() * 2, (int) getVisionRadius() * 2);
	}