// Flier$Ego.java [dynamic]

public class Flier$Ego 

{

  // upstream interface. Must implement.

  public void Fly(Flier host, int x, int y, 

                  int altitude) {

    resetMetersFlown();

    host.Takeoff();

    for (int a=0; a < altitude; a++) host.Ascend();

    while( !host.ThereYet(x, y) ) host.FlapTowards(x, y);

    for(int a = altitude; a > 0; a--) host.Descend();

    host.Land();

  }

  // private functions. Must implement.

  private void resetMetersFlown() { meters_flown = 0; }

  // attributes (specific to the role)

  private float meters_flown;

  // constructor (optional)

  Flier$Ego( Shrink shrink ) { 

    resetMetersFlown(); 

    shrink.register_personality( "Flier" );

  }

}