bo.getWidth( ), bo.getHeight( ),
width, height,
	public final Engine3D get3DEngine( )	{		if ( engine == null )		{			ChartWithAxes cwa = (ChartWithAxes) getModel( );			// Use a fixed light direction here.			Vector lightDirection = new Vector( -1, 1, -1, false );			// Vector lightDirection = new Vector( 0, 0, -1, false );			Bounds bo = getPlotBounds( );			engine = new Engine3D( cwa.getRotation( ),					lightDirection,					bo.getWidth( ),					bo.getHeight( ),					500,					1500,					10,					10000,					100 );		}		return engine;	}