VTK/ITK/QT - 未解决的外部符号错误 (LNK2001)

Question

在 Visual Studio 2013 年使用带有 Qt5.7 和 ITK 4.5 的 VTK 7.0 构建我的代码时，出现以下错误：

error LNK2001: unresolved external symbol "protected: virtual void __cdecl vtkVRMLSource2::SetNthOutput(int,class vtkDataObject *)" (?SetNthOutput@vtkVRMLSource2@@MEAAXHPEAVvtkDataObject@@@Z)

这个文件对应的代码是这样的(`vtkVRMLSource2.cxx``):

#include "vtkVRML.h"
#include "vtkVRMLSource2.h"
#include "vtkVRMLImporter.h"
#include "vtkObjectFactory.h"
#include "vtkPolyData.h"
#include "vtkProperty.h"
#include "vtkActorCollection.h"
#include "vtkActor.h"
#include "vtkPointData.h"
#include "vtkCellData.h"
#include "vtkPolyDataMapper.h"
#include "vtkRenderer.h"
#include "vtkTransformPolyDataFilter.h"
#include "vtkAppendPolyData.h"
#include "vtkTransform.h"
#include "vtkUnsignedCharArray.h"
#include "vtkSmartPointer.h"
#include "vtkFloatArray.h"
#include "vtkDataObject.h"
#include <stdio.h>
#include <iostream>
.....
idx = 0;
while ( (actor = actors->GetNextActor()) )
{
mapper = vtkPolyDataMapper::SafeDownCast(actor->GetMapper());
if (mapper)
  {
  //mapper->GetInput()->Update();
  //vtkPolyData *newOutput = vtkPolyData::New();
  vtkPolyData *newOutput = mapper->GetInput();
  //newOutput->CopyInformation(mapper->GetInput());
  this->SetNthOutput(idx, newOutput);
  ++idx;
  newOutput->Delete();
  newOutput = NULL;
  }
}

vtkVRMLSource2.h 文件是：

#include "vtkAlgorithm.h"
#include "vtkDataObject.h"
class vtkVRMLSource2 : public vtkAlgorithm{

public:
int  vtkTypeRevisionMacro(vtkVRMLSource2, vtkAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
static vtkVRMLSource2 *New();
int NumberOfOutputs;

vtkSetStringMacro(FileName)
vtkGetStringMacro(FileName)

int GetNumberOfOutputs();
vtkPolyData* GetOutput(int idx);
vtkPolyData* GetOutput() { return this->GetOutput(0);}

vtkSetMacro(Color,int) // usage example: this->SetColor(1);
vtkGetMacro(Color,int)
vtkBooleanMacro(Color,int)

vtkSetMacro(Append,int) // usage example: this->SetAppend(1);
vtkGetMacro(Append,int)
vtkBooleanMacro(Append,int)

protected:
 vtkVRMLSource2();
 ~vtkVRMLSource2();

 void Execute();
 void InitializeImporter();
 void CopyImporterToOutputs();

 char* FileName;
 vtkVRMLImporter *Importer;
 int Color;
 int Append;

 virtual void SetNthOutput(int num, vtkDataObject *output);
 private:
   vtkVRMLSource2(const vtkVRMLSource2&);  
   void operator=(const vtkVRMLSource2&); 
};

我已经在 VS 中链接了所有正确的 VTK、ITK 和 Qt 库。你能帮帮我吗？

Answer 1

您需要为您在头文件中声明的 void SetNthOutput(int num, vtkDataObject *output) 提供定义。您可以将其添加到 vtkVRMLSource2.cxx:

void vtkVRMLSource2::SetNthOutput(int num, vtkDataObject *output)
{
    //code goes here
}

VTK/ITK/QT - 未解决的外部符号错误 (LNK2001)

VTK / ITK/ QT - unresolved external symbol error (LNK2001)

c++

qt

visual-studio-2013

vtk

itk