Documentation/Nightly/Developers/Tutorials/MigrationGuide/VTK5-to-VTK6

Transition from VTK5 to VTK6

This section documents required change to make Slicer code work with VTK6.

• See VTK_6 Migration Guide

Use SetInputPolyDataConnection and GetPolyDataConnection

Starting with Slicer r24801, support for VTK5 API was removed and VTK6 API should be used.

Error message similar to:

error: ‘class vtkMRMLModelDisplayNode’ has no member named ‘SetInputPolyData’
 resultDisplay->SetInputPolyData(resultModel->GetPolyData());
                ^

Solution:

Replace occurrences of SetInputPolyData/GetPolyData with SetInputPolyDataConnection/GetPolyDataConnection.

Use AllocateScalars

Starting with Slicer r24801, support for VTK5 API was removed and VTK6 API should be used.

Error message similar to:

  error: no matching function for call to ‘vtkImageData::SetNumberOfScalarComponents(int)’
    mp_phi->SetNumberOfScalarComponents(1);
                                         ^

Solution:

Replace lines like:

 imageData->SetScalarTypeToUnsignedShort();		
 imageData->SetNumberOfScalarComponents(1); // image holds one value intensities		
 imageData->AllocateScalars(); // allocate storage for image data

with:

 imageData->AllocateScalars(VTK_UNSIGNED_SHORT, 1); // allocate storage for image data