import cs1705.*;

// -------------------------------------------------------------------------
/**
 *  This robot adds extra behaviors to a NavigatorBot so that it can trace
 *  copy patterns at the request of a StencilBot.
 * 
 *  @author  Stephen Edwards
 *  @version 2003.09.21
 */
public class CopierBot
    extends NavigatorBot
{
    //~ Variables .............................................................
    
    int streetOrigin;
    int avenueOrigin;
    
    //~ Constructors ..........................................................

    // ----------------------------------------------------------
    /**
     * Construct a stencil robot by specifying its starting state.
     * The parameters are just passed to the corresponding NavigatorBot
     * constructor.
     */
    public CopierBot( int       street,
                      int       avenue,
                      Direction facing,
                      int       numBeepers )
    {
        super( street, avenue, facing, numBeepers );
        streetOrigin = street;
        avenueOrigin = avenue;
    }


    //~ Methods ...............................................................

    // ----------------------------------------------------------
    /**
     * Move to the specified intersection.
     * 
     * @param street the street number of the destination
     * @param avenue the avenue number of the destination
     */
    public void moveTo( int street, int avenue )
    {
        super.moveTo( streetOrigin + 2 * street,
                      avenueOrigin + 2 * avenue );
    }


    // ----------------------------------------------------------
    /**
     * Place beepers on 4 corners in a square.
     */
    public void putBeeper()
    {
        int count = 4;
        faceNorth();
        while ( count > 0 )
        {
            super.putBeeper();
            turnLeft();
            move();
            count--;
        }
    }

}