/**
 * AutoBasicVehicle.java
 *
 * @author Zuo Yan
 * @version 1.0
 */

package vehicle;

import world.World;

/**
 * An AutoBasicVehicle demostrates the correct usage of the update() method
 * to automatically update the state of this vehicle.<br>
 * An AutoBasicVehicle will automatically move left to right on the world and
 * return to the left side of the world once it passes the right side.
 */
public class AutomaticRightMovingV extends BasicVehicle {

    /**
     * Creates a automatically moving vehicle
     * 
     * @param world the World this vehicle is in
     */
    public AutomaticRightMovingV(World theWorld) {
        super(theWorld);
    }

    /**
     * Called by World when it's time to update.
     * Moves to the right by 1 unit.
     */
    public void update() {
        if (getX() > super.theWorld.getSize().width) {
            moveTo(0, getY()); 
        }
        else {
            moveBy(1, 0);
        }
    }
}