[Rtk-users] Linker problem

Julien Jomier julien.jomier at kitware.com
Fri May 31 06:02:09 EDT 2013 

Cyril,

You are missing the constructor definition and you should probably 
uncomment these lines:

//template <class TInputImage, class TOutputImage>
//PublicBackProjectionImageFilter<TInputImage,TOutputImage>
//::PublicBackProjectionImageFilter()
//{
//}

Julien

On 31/05/2013 11:14, MORY, CYRIL wrote:
> Hi Simon,
>
> Thanks for your answer. I think what I did is allowed in C++ (if I'm wrong, please correct me) : I have defined a daughter class with public methods that call protected methods of the mother class. I think it wouldn't be allowed, indeed, to change the private/protected/public type of a method, but that's not what I did. Just to check, I have tried to modify the two methods of the daughter class, removing the internal calls to the GetProjection() and GetIndexToIndexProjectionMatrix(). The linker error remains the same.
>
> I have the feeling it must be something obvious, but I can't find it. And I'd prefer not to copy-paste the code of these two functions. I'd give it another try today, and if it keeps not working I'll revert to the solution you propose.
>
> Regards,
> Cyril
>
> -----Message d'origine-----
> De : simon.rit at gmail.com [mailto:simon.rit at gmail.com] De la part de Simon Rit
> Envoyé : jeudi 30 mai 2013 18:07
> À : MORY, CYRIL
> Cc : rtk-users at openrtk.org
> Objet : Re: [Rtk-users] Linker problem
>
> Hi Cyril,
> I don't think it is allowed in C++ to change the private/protected/public type of a method in daughter classes.
> Otherwise, it would screw up the purpose of it. If your filter is not a BackProjection and you don't want to inherit from it, I would advise you to copy paste the GetIndexToIndexMatrix in your class. There are a few things there that depends on some class members so you will have to simplify it for your case (or have the same members in your class).
> Simon
>
>
> On Thu, May 30, 2013 at 5:48 PM, MORY, CYRIL <Cyril.Mory at philips.com> wrote:
>> Hi,
>>
>>
>>
>> I've written a small filter deriving from
>> rtk::BackProjectionImageFilter, because I needed to access the
>> protected methods GetProjection() and
>> GetIndexToIndexProjectionMatrix() for a CUDA filter I'm writing.
>>
>> The filter has only two additional methods, both public, called
>> PublicGetProjection() and PublicGetIndexToIndexProjectionMatrix(),
>> which call their protected counterparts.
>>
>> The .h and .txx files are below.
>>
>>
>>
>> When creating this filter in my CUDA filter, I get an error message
>> from the linker :
>>
>> ../../bin/librtkcuda.a(rtkCudaProjectionStackToFourDImageFilter.cxx.o)
>> : In function `rtk::PublicBackProjectionImageFilter<itk::Image<float,
>> 3u>, itk::Image<float, 3u> >::New()':
>>
>> /home/cyril/sources/rtk/RTK/code/rtkPublicBackProjectionImageFilter.h:57:
>> undefined reference to
>> `rtk::PublicBackProjectionImageFilter<itk::Image<float, 3u>,
>> itk::Image<float, 3u> >::PublicBackProjectionImageFilter()'
>>
>> collect2: error: ld returned 1 exit status
>>
>>
>>
>> It's probably a stupid mistake, but I can't find it. Can someone help me ?
>>
>>
>>
>> rtkPublicBackProjectionImageFilter.h
>>
>>
>>
>>
>>
>> #ifndef __rtkPublicBackProjectionImageFilter_h
>>
>> #define __rtkPublicBackProjectionImageFilter_h
>>
>>
>>
>> #include "rtkBackProjectionImageFilter.h"
>>
>>
>>
>> namespace rtk
>>
>> {
>>
>>
>>
>> /** \class PublicBackProjectionImageFilter
>>
>> * \brief BackProjectionImageFilter where protected methods are made
>> public
>>
>> *
>>
>> * This filter exposes some of the methods that are protected in
>> BackProjectionImageFilter
>>
>> * Required for CudaProjectionStackToFourDImageFilter
>>
>> *
>>
>> * \author Cyril Mory
>>
>> *
>>
>> * \ingroup Projector
>>
>> */
>>
>> template <class TInputImage, class TOutputImage>
>>
>> class ITK_EXPORT PublicBackProjectionImageFilter :
>>
>>          public
>> rtk::BackProjectionImageFilter<TInputImage,TOutputImage>
>>
>> {
>>
>> public:
>>
>>      /** Standard class typedefs. */
>>
>>      typedef PublicBackProjectionImageFilter                         Self;
>>
>>      typedef itk::ImageToImageFilter<TInputImage,TOutputImage>
>> Superclass;
>>
>>      typedef itk::SmartPointer<Self>                           Pointer;
>>
>>      typedef itk::SmartPointer<const Self>                     ConstPointer;
>>
>>      typedef typename TInputImage::PixelType InputPixelType;
>>
>>      typedef typename TOutputImage::RegionType OutputImageRegionType;
>>
>>
>>
>>      typedef rtk::ProjectionGeometry<TOutputImage::ImageDimension>
>> GeometryType;
>>
>>      typedef typename GeometryType::Pointer
>> GeometryPointer;
>>
>>      typedef typename GeometryType::MatrixType
>> ProjectionMatrixType;
>>
>>      typedef itk::Image<InputPixelType, TInputImage::ImageDimension-1>
>> ProjectionImageType;
>>
>>      typedef typename ProjectionImageType::Pointer
>> ProjectionImagePointer;
>>
>>
>>
>>      /** Method for creation through the object factory. */
>>
>>      itkNewMacro(Self)
>>
>>
>>
>>      /** Run-time type information (and related methods). */
>>
>>      itkTypeMacro(PublicBackProjectionImageFilter, BackProjectionImageFilter)
>>
>>
>>
>>      /** The input is a stack of projections, we need to interpolate in one
>> projection
>>
>>        for efficiency during interpolation. Use of itk::ExtractImageFilter is
>>
>>        not threadsafe in ThreadedGenerateData, this one is. The output can be
>> multiplied by a constant. */
>>
>>      ProjectionImagePointer PublicGetProjection(const unsigned int iProj);
>>
>>
>>
>>      /** Creates iProj index to index projection matrices with current inputs
>>
>>        instead of the physical point to physical point projection matrix
>> provided by Geometry */
>>
>>      ProjectionMatrixType PublicGetIndexToIndexProjectionMatrix(const
>> unsigned int iProj);
>>
>> protected:
>>
>>      PublicBackProjectionImageFilter();
>>
>>      virtual ~PublicBackProjectionImageFilter() {}
>>
>>
>>
>> private:
>>
>>      PublicBackProjectionImageFilter(const Self&); //purposely not
>> implemented
>>
>>      void operator=(const Self&);            //purposely not implemented
>>
>>
>>
>> };
>>
>>
>>
>> } // end namespace rtk
>>
>>
>>
>> #ifndef ITK_MANUAL_INSTANTIATION
>>
>> #include "rtkPublicBackProjectionImageFilter.txx"
>>
>> #endif
>>
>>
>>
>> #endif
>>
>>
>>
>>
>>
>>
>>
>> rtkPublicBackProjectionImageFilter.txx
>>
>>
>>
>> /*=========================================================================
>>
>> *
>>
>> *  Copyright RTK Consortium
>>
>> *
>>
>> *  Licensed under the Apache License, Version 2.0 (the "License");
>>
>> *  you may not use this file except in compliance with the License.
>>
>> *  You may obtain a copy of the License at
>>
>> *
>>
>> *         http://www.apache.org/licenses/LICENSE-2.0.txt
>>
>> *
>>
>> *  Unless required by applicable law or agreed to in writing, software
>>
>> *  distributed under the License is distributed on an "AS IS" BASIS,
>>
>> *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
>>
>> *  See the License for the specific language governing permissions and
>>
>> *  limitations under the License.
>>
>> *
>>
>> *=========================================================================*/
>>
>>
>>
>> #ifndef __rtkPublicBackProjectionImageFilter_txx
>>
>> #define __rtkPublicBackProjectionImageFilter_txx
>>
>>
>>
>> #include "rtkPublicBackProjectionImageFilter.h"
>>
>>
>>
>> namespace rtk
>>
>> {
>>
>>
>>
>> //template <class TInputImage, class TOutputImage>
>>
>> //PublicBackProjectionImageFilter<TInputImage,TOutputImage>
>>
>> //::PublicBackProjectionImageFilter()
>>
>> //{
>>
>> //}
>>
>>
>>
>> template <class TInputImage, class TOutputImage>
>>
>> typename
>> PublicBackProjectionImageFilter<TInputImage,TOutputImage>::ProjectionImagePointer
>>
>> PublicBackProjectionImageFilter<TInputImage,TOutputImage>
>>
>> ::PublicGetProjection(const unsigned int iProj)
>>
>> {
>>
>>      return this->GetProjection(iProj);
>>
>> }
>>
>>
>>
>> template <class TInputImage, class TOutputImage>
>>
>> typename
>> PublicBackProjectionImageFilter<TInputImage,TOutputImage>::ProjectionMatrixType
>>
>> PublicBackProjectionImageFilter<TInputImage,TOutputImage>
>>
>> ::PublicGetIndexToIndexProjectionMatrix(const unsigned int iProj)
>>
>> {
>>
>>      return this->GetIndexToIndexProjectionMatrix(iProj);
>>
>> }
>>
>>
>>
>> } // end namespace rtk
>>
>>
>>
>> #endif
>>
>>
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