[vtk-developers] VTK Modular: vtkTextMapper::New returns null

[Bill Lorensen]

Marcus,

include vtkTextMapper in the example solves the crash. But, of course,
this is not a good solution.

I wonder how many other classes might have these issues.

On Fri, Apr 27, 2012 at 3:56 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
> Great. Looking forward to a patch.
>
> The more apps trying VTK Modular, the better.
>
> It's encouraging how much progress is being made on VTK6 so quickly.
>
> Bill
>
> On Fri, Apr 27, 2012 at 3:47 PM, Marcus D. Hanwell
> <marcus.hanwell at kitware.com> wrote:
>> On Fri, Apr 27, 2012 at 2:45 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
>>> I'm trying to track down some VTK Wiki examples failures.  This line:
>>>  vtkSmartPointer<vtkSliderRepresentation2D> sliderRep =
>>>    vtkSmartPointer<vtkSliderRepresentation2D>::New();
>>> crashes.
>>> gdb shows that in vtkSliderRepresentation2D.cxx
>>> this->LabelMapper = vtkTextMapper::New();
>>> returns 0.
>>>
>>> Seems that the factory can't find a proper text mapper. However, the
>>> VTK build itself passes tests that use vtkSliderRepresentation2D.
>>>
>> This is a bug we discovered in the more deeply nested modules, I will
>> try to get a fix in. The issue is when your application does not
>> include a header from the interface module that is overridden by a
>> module. So in this case FreeType contains the interface, and
>> FreeTypeOpenGL the implementation but you are using Widgets and only
>> their implementation files include.
>>
>> I had meant to chat to Brad about it, but including one of the headers
>> from the FreeType module fixed it in ChemData.
>>
>> Marcus
>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com



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