Hi all. I'm trying to create a very simple filter with no inputs and
outputs and templates but when i make it, compilers gives me some errors
and i don't understand how to fix them.
this is my header file of the filter:
****************TrainingFilter.h******************
#ifndef __TrainingFilter_h
#define __TrainingFilter_h
#include "itkObject.h"
#include "itkImage.h"
namespace itk
{
class TrainingFilter :
public Object
{
public:
/** Standard class typedefs. */
typedef TrainingFilter Self;
typedef Object Superclass;
typedef SmartPointer < Self > Pointer;
typedef SmartPointer < const Self > ConstPointer;
itkNewMacro (Self);
itkTypeMacro(TrainingFilter, Object);
void Update(); //Method of the filter
protected:
TrainingFilter();
~TrainingFilter();
private:
TrainingFilter(const Self &); //purposely not implemented
void operator=(const Self &); //purposely not implemented
};
}
#endif
This is its implementation:
*******************TrainingFilter.cxx*************
#include "TrainingFilter.h"
#include "itkObject.h"
#include <iostream>
namespace itk
{
TrainingFilter::TrainingFilter() { };
TrainingFilter::~TrainingFilter() { };
void TrainingFilter::Update()
{
std::cout<<"**Filter called .cxx **"<<std::endl;
}
} // end namespace
and this is my main, where i try, as usual, to create a FilterType and a
smartpointer to call the Update method.
***********main.cxx*****************
#include "TrainingFilter.h"
#include <iostream>
using namespace std;
int main(int argc, char * argv [])
{
typedef itk::TrainingFilter FilterTypeTraining;
FilterTypeTraining::Pointer filterTraining = FilterTypeTraining::New();
try
{
filterTraining-> Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Exception caught !" << std::endl;
std::cerr << excp << std::endl;
}
return 0;
}
This is the compiler error:
CMakeFiles/TrainingFilter.dir/main.cxx.o: In function `main':
main.cxx:(.text+0x2c): undefined reference to
`itk::TrainingFilter::Update()'
CMakeFiles/TrainingFilter.dir/main.cxx.o: In function
`itk::TrainingFilter::New()':
main.cxx:(.text._ZN3itk14TrainingFilter3NewEv[itk::TrainingFilter::New()]+0x42):
undefined reference to `itk::TrainingFilter::TrainingFilter()'
CMakeFiles/TrainingFilter.dir/main.cxx.o: In function
`itk::ObjectFactory<itk::TrainingFilter>::Create()':
main.cxx:(.text._ZN3itk13ObjectFactoryINS_14TrainingFilterEE6CreateEv[itk::ObjectFactory<itk::TrainingFilter>::Create()]+0xe):
undefined reference to `typeinfo for itk::TrainingFilter'
main.cxx:(.text._ZN3itk13ObjectFactoryINS_14TrainingFilterEE6CreateEv[itk::ObjectFactory<itk::TrainingFilter>::Create()]+0x47):
undefined reference to `typeinfo for itk::TrainingFilter'
collect2: ld returned 1 exit status
make[2]: *** [TrainingFilter] Error 1
make[1]: *** [CMakeFiles/TrainingFilter.dir/all] Error 2
make: *** [all] Error 2
Thanks for your help,
Alessio
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