public void transformPointer(Face face) {
		if(face==Face.SOUTHERN){
			rotationRequired = Math.toRadians(90);
		}else if(face==Face.WESTERN){
			rotationRequired = Math.toRadians(180);
		}else if(face==Face.NORTHERN){
			rotationRequired = Math.toRadians(270);
		}else if(face==Face.EASTERN){
			rotationRequired = Math.toRadians(0);
		}
		tx = AffineTransform.getRotateInstance(rotationRequired, locationX, locationY);
		op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);
	}