[vtkusers] Set the Color of each line in vtkChartParallelCoordinates

[Matthias Eggert]

> Hi Matthias,
> 
> You cannot downcast a chart to a plotplots; they are two different types.
> 
> You need to add the points to the chart, and then cast the PlotPlot e.g.
> 
>   vtkPlotPoints *tmp = vtkPlotPoints::SafeDownCast( 
> chart->AddPlot(vtkChart::POINTS) );
> 
> Hope that helps,
> Jon
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Hi Jon and thanks for your reply.
I already added a table to the chart with: chart->GetPlot(0)->SetInput(table);
So my line would be: vtkPlotPoints *tmp = vtkPlotPoints::SafeDownCast( chart-
>getPlot(0) );  right?

When I do this, I still get an exception at: tmp->SetLookupTable(lookupTable);

And then i wouldn't know how to add my "tmp" variable to my view scene. view-
>GetScene()->AddItem(tmp); does not work either :( since tmp has a wrong class 
type.

Bye,
Matthias