xpoints[i] += dOffset; ypoints[i] += dOffset;
Location lo = (Location) getPoints( ).get( i ); lo.translate( dOffset, dOffset );
	public final void shiftVertices( double dOffset )	{		for ( int i = 0; i < 4; i++ )		{			xpoints[i] += dOffset;			ypoints[i] += dOffset;		}	}