[vtkusers] Issues moving code to a function and returning a smart pointer

[Bill Lorensen]

Yo0 probably using vtk 5.x. Change SetInputData to SetInput



On Mon, May 20, 2013 at 11:45 AM, Manuel Corrales
<manuelcorrales at gmail.com>wrote:

> David, I am getting this error on your code:
>
> error: ‘class vtkImageViewer2’ has no member named ‘SetInputData’
>       imageViewer->SetInputData(connector->GetOutput());
>
>
> Am I using and old or bad compiled version of vtk?
>
> Regards,
> Manuel.
>
>
>
> On Mon, May 20, 2013 at 11:06 AM, Manuel Corrales <
> manuelcorrales at gmail.com> wrote:
>
>> Thanks David. Sorry about the example. I will attach a working example as
>> soon as I can. About  the sample code you sent, my problem is when the code
>> is the other way around. I mean, reading the file and the connector in the
>> function and then rendering the viewer in the main method. It maybe a Qt
>> widget issue, but I am not sure.
>>
>> Thanks for your response!
>>
>>
>> On Mon, May 20, 2013 at 10:55 AM, David Doria <daviddoria at gmail.com>wrote:
>>
>>> On Fri, May 17, 2013 at 3:43 PM, Manuel Corrales
>>> <manuelcorrales at gmail.com> wrote:
>>> > Hello all. I have a simple code that reads an image using ITK, then it
>>> > convert it to VTK and after that I display the image in a QVTKWidget.
>>> The
>>> > code is this and works fine:
>>> >
>>> >      typedef itk::Image< double, 2 >         ImageType;
>>> >       typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
>>> >       typedef itk::ImageFileReader<ImageType> ReaderType;
>>> >
>>> >       ReaderType::Pointer reader = ReaderType::New();
>>> >       reader->SetFileName(file.c_str());
>>> >       reader->Update();
>>> >
>>> >       ConnectorType::Pointer connector = ConnectorType::New();
>>> >       connector->SetInput(reader->GetOutput());
>>> >       connector->Update();
>>> >       ImageReader *myReader = new ImageReader();
>>> >       vtkSmartPointer<vtkImageViewer2> vtkImageViewer =
>>> > vtkSmartPointer<vtkImageViewer2>::New();
>>> >       vtkImageViewer->SetInput(connector->GetOutput());
>>> >
>>> vtkImageViewer->SetRenderWindow(this->qvtkWidget->GetRenderWindow());
>>> >       vtkImageViewer->Render();
>>> >
>>> >
>>> > Now if I change this code and create a separate function to perform the
>>> > connection from ITK to VTK, I get a segfault:
>>> >
>>> > ImageReader *myReader = new ImageReader();
>>> >       vtkSmartPointer<vtkImageViewer2> vtkImageViewer =
>>> > myReader->renderITKReaderInVTK(file);
>>> >
>>> vtkImageViewer->SetRenderWindow(this->qvtkWidget->GetRenderWindow());
>>> >       vtkImageViewer->Render();
>>> >
>>> > and the called function:
>>> >
>>> > vtkSmartPointer<vtkImageViewer2>
>>> > ImageReader::renderITKReaderInVTK(std::string fileName) {
>>> >     typedef itk::Image< double, 2 >         ImageType;
>>> >     typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
>>> >     typedef itk::ImageFileReader<ImageType> ReaderType;
>>> >
>>> >     ReaderType::Pointer reader = ReaderType::New();
>>> >     qDebug() << "Setting reader file name";
>>> >     reader->SetFileName(fileName.c_str());
>>> >     qDebug() << "Updating reader";
>>> >     reader->Update();
>>> >
>>> >     ConnectorType::Pointer connector = ConnectorType::New();
>>> >     qDebug() << "Setting input to connector";
>>> >     connector->SetInput(reader->GetOutput());
>>> >     qDebug() << "Updating connector";
>>> >     connector->Update();
>>> >
>>> >     vtkSmartPointer<vtkImageViewer2> vtkImageViewer =
>>> > vtkSmartPointer<vtkImageViewer2>::New();
>>> >     qDebug() << "Setting connector outupt -> imageViewer input";
>>> >     vtkImageViewer->SetInput(connector->GetOutput());
>>> >     qDebug() << "Image viewer set up ready";
>>> >     return vtkImageViewer;
>>> > }
>>> >
>>> > Any ideas why the same code (I think) works if it is all together but
>>> fail
>>> > when it's in a different function?
>>> >
>>> > Thanks in advance!
>>> > Regards,
>>> > Manuel.
>>>
>>>
>>> It is much easier for us if you provide a compilable example of the
>>> error. I tried the following, but it seems to work fine. If you can
>>> provide something like this that segfaults, I'm sure someone can help
>>> you out.
>>>
>>> #include <vtkVersion.h>
>>> #include <vtkSmartPointer.h>
>>> #include <vtkRenderWindow.h>
>>> #include <vtkRenderWindowInteractor.h>
>>> #include <vtkRenderer.h>
>>> #include <vtkImageViewer2.h>
>>>
>>> #include "itkImage.h"
>>> #include "itkImageFileReader.h"
>>> #include "itkImageToVTKImageFilter.h"
>>>
>>> vtkSmartPointer<vtkImageViewer2> CreateImageViewer();
>>>
>>> int main(int, char *[])
>>> {
>>>
>>>     typedef itk::Image< double, 2 >         ImageType;
>>>      typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
>>>      typedef itk::ImageFileReader<ImageType> ReaderType;
>>>
>>>      ReaderType::Pointer reader = ReaderType::New();
>>>      reader->SetFileName("test.png");
>>>      reader->Update();
>>>
>>>      ConnectorType::Pointer connector = ConnectorType::New();
>>>      connector->SetInput(reader->GetOutput());
>>>      connector->Update();
>>>
>>>      vtkSmartPointer<vtkImageViewer2> imageViewer = CreateImageViewer();
>>>      imageViewer->SetInputData(connector->GetOutput());
>>>      imageViewer->Render();
>>>
>>>   return EXIT_SUCCESS;
>>> }
>>>
>>> vtkSmartPointer<vtkImageViewer2> CreateImageViewer()
>>> {
>>>     vtkSmartPointer<vtkImageViewer2> imageViewer =
>>> vtkSmartPointer<vtkImageViewer2>::New();
>>>     return imageViewer;
>>> }
>>>
>>
>>
>
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-- 
Unpaid intern in BillsBasement at noware dot com
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