Bug 181361 Exception is thrown out in Chart builder when you set all null values for Value Series [0001]
Description: Exception is thrown out in Chart builder when you set all null values for Value Series. Build number: 2.2.0.v20070405-0630 Steps to reproduce: 1. Create a Bar Chart, set all null value data for Value Series. Expected result: No exception is thrown out. Actual result: Exception is thrown out (See the screenshot). Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith3DAxes.java
y1 = p2d.getY( );
			event.setLocation3D( endVertext );
			if ( engine.processEvent( event, xOff, yOff ) != null )
			{
				p2d = event.getLocation( );
				x2 = p2d.getX( );
				y2 = p2d.getY( );
				return Math.sqrt( ( y2 - y1 )
						* ( y2 - y1 )
						+ ( x2 - x1 )
						* ( x2 - x1 ) )
						/ ( end - start );
			}
		}
		return 1;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.computation.withaxes.PlotWithAxes#compute(org.eclipse.birt.chart.model.attribute.Bounds)
	 */
	public void compute( Bounds bo ) throws ChartException,
			IllegalArgumentException
	{
		bo = bo.scaledInstance( dPointToPixel ); 
		boPlotBackground = BoundsImpl.copyInstance( bo );
		
		iDimension = getDimension( cwa.getDimension( ) );
		assert iDimension == IConstants.THREE_D;
		dXAxisPlotSpacing = cwa.getPlot( ).getHorizontalSpacing( )