Bug 212370 [Regression] Negative value can not be shown both in chart builder and when preview [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
}
		OneAxis oaxOrthogonal = findOrthogonalAxis( seOrthogonal );
		if ( oaxOrthogonal == null )
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.NOT_FOUND,
					"exception.axis.series.link.broken", 
					new Object[]{
						seOrthogonal
					},
					Messages.getResourceBundle( rtc.getULocale( ) ) );
		}
		final OneAxis oaxBase = aax.getPrimaryBase( );
		final SeriesDefinition sdBase = (SeriesDefinition) oaxBase.getModelAxis( )
				.getSeriesDefinitions( )
				.get( 0 );
		final AutoScale scBase = oaxBase.getScale( );
		final AutoScale scOrthogonal = oaxOrthogonal.getScale( );
		final int iTickCount = scBase.getTickCount( );
		int iUnitCount = iTickCount;
		final int iDirection = scBase.getDirection( );
		
		final double dUnitSize = ( iDirection == BACKWARD || ( iDirection == AUTO && aax.areAxesSwapped( ) ) ) ? -scBase.getUnitSize( )
				: scBase.getUnitSize( );
		if ( scBase.getType( ) == IConstants.DATE_TIME )
		{
			
		}
		AxisTickCoordinates daTickCoordinates = scBase.getTickCordinates( );
		Object oDataBase = null;