Bug 188029 Top face is missing in Area chart of 2D+ with negative values
Top face is missing in Area chart of 2D+ with negative values. Please see attached screenshot.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
boPlotWithMargin.setWidth( factor
							* ( asDouble( scale.getMaxWithMargin( ) == null ? scale.getMaximum( )
									: scale.getMaxWithMargin( ) ).doubleValue( ) - asDouble( scale.getMinWithMargin( ) == null ? scale.getMinimum( )
									: scale.getMinWithMargin( ) ).doubleValue( ) )
							+ insCA.getLeft( )
							+ insCA.getRight( )
							+ 1 );
				}
			}
			scale = axPV.getScale( );
			if ( scale.getMaxWithMargin( ) != null
					|| scale.getMinWithMargin( ) != null )
			{
				if ( ( scale.getType( ) & LINEAR ) == LINEAR )
				{
					double factor = Math.abs( daX[1] - daX[0] )
							/ ( asDouble( scale.getMaximum( ) ).doubleValue( ) - asDouble( scale.getMinimum( ) ).doubleValue( ) );
					if ( scale.getMaxWithMargin( ) != null )
					{
						boPlotWithMargin.setTop( boPlotWithMargin.getTop( )
								- factor
								* ( asDouble( scale.getMaxWithMargin( ) ).doubleValue( ) - asDouble( scale.getMaximum( ) ).doubleValue( ) ) );
					}
					boPlotWithMargin.setHeight( factor
							* ( asDouble( scale.getMaxWithMargin( ) == null ? scale.getMaximum( )
									: scale.getMaxWithMargin( ) ).doubleValue( ) - asDouble( scale.getMinWithMargin( ) == null ? scale.getMinimum( )
									: scale.getMinWithMargin( ) ).doubleValue( ) )
							+ insCA.getTop( )
							+ insCA.getBottom( )
							+ 1 );