[vtkusers] Issue when setting number of ticks on a vtkAxis

[joaoroberto88]

Hi VTK Users,

I'm having an issue when defining the number of ticks of vtkChartXY bottom
axis, even using SetNumberOfTicks method. The axis values are shown as time
stamp strings (by using SetCustomTickPositions). Since there are many
values, they appear overlapped (as shown in the attached image). I would
like to show only 2 ticks as implemented in the code bellow:

vtkSmartPointer<vtkDoubleArray> timeStamps =
vtkSmartPointer<vtkDoubleArray>::New();
vtkSmartPointer<vtkStringArray> timeStampStrings =
vtkSmartPointer<vtkStringArray>::New();
vtkSmartPointer<vtkDoubleArray> scalars =
vtkSmartPointer<vtkDoubleArray>::New();

vtkSmartPointer<vtkChartXY> chart = vtkSmartPointer<vtkChartXY>::New();

// Populate the three arrays and set up vtkTable and vtkChartXY

vtkSmartPointer<vtkAxis> bottomAxis = chart->GetAxis(vtkAxis::BOTTOM);
bottomAxis->SetNumberOfTicks(2);
bottomAxis->SetCustomTickPositions(timeStamps, timeStampStrings);

<http://vtk.1045678.n5.nabble.com/file/n5735645/Screen_Shot_2015-12-24_at_08.png> 

Thanks for any help.

Joao.



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