void rotatePosY(boolean clockwise) {
		int tx = x;
		int ty = y;
		int tz = z;
		double rad = Math.toRadians(clockwise ? -90 : 90);
		x = (int) Math.round(tx * Math.cos(rad) + tz * Math.sin(rad));
		y = ty;
		z = (int) Math.round(-tx * Math.sin(rad) + tz * Math.cos(rad));
	}