vtk 图像序列鼠标交互翻页

 读一组dcm图像，鼠标交互翻页，取点

#include <vtkAbstractPicker.h>
#include <itkGDCMImageIO.h>
#include <itkGDCMSeriesFileNames.h>
#include <itkImageSeriesReader.h>
#include <vtkPolyDataMapper.h>
#include <vtkImageData.h>
#include <vtkProperty.h>
#include <vtkRendererCollection.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkSmartPointer.h>
#include <vtkMetaImageReader.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkMarchingCubes.h>
#include <vtkStripper.h>
#include <vtkDecimatePro.h>
#include <vtkSmoothPolyDataFilter.h>
#include <vtkPolyDataNormals.h>
#include <vtkActor.h>
#include <vtkImageActor.h>
#include <vtkTriangleFilter.h>
#include <vtkMassProperties.h> 
#include <vtkDICOMImageReader.h>
#include <vtkImageViewer2.h>
#include <vtkInteractorStyleImage.h>
#include <vtkCornerAnnotation.h>
#include <vtkAbstractMapper3D.h>
#include <vtkInteractorStyleImage.h>
#include "vtkAutoInit.h"
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkInteractionStyle);
#include <vtkTextProperty.h>
typedef int16_t PixelType;
typedef itk::Image< PixelType, 3 > ImageType;
class Interactor : public vtkInteractorStyleTrackballCamera {
protected:
    vtkImageViewer2 *Viewer;
    int CurrentSliceNum = 1;
    int num = 0;
    int SliceNum;
    ImageType::SizeType Dim;
    ImageType::SpacingType  Spacing;
    ImageType::PointType  origin;

    ImageType::Pointer Image;
    ImageType::IndexType  point_tempx;
public:
    static Interactor *New();
    vtkTypeMacro(Interactor, vtkInteractorStyleTrackballCamera);
    void SetViewer(vtkImageViewer2 *viewer) { this->Viewer = viewer; }
  
    void SetImage(ImageType::Pointer ima) {
        Image = ima;
        Spacing = Image->GetSpacing();
        origin = Image->GetOrigin();
        Dim = Image->GetLargestPossibleRegion().GetSize();
        SliceNum = Dim[2];
    }

    void OnMouseWheelForward() override {
        //+
        if (CurrentSliceNum < SliceNum) CurrentSliceNum++;
        this->Viewer->SetSlice(CurrentSliceNum);

        this->Viewer->GetRenderer()->ResetCamera();  // need
    }
    void OnMouseWheelBackward() override {
        //-
        if (CurrentSliceNum > 1) CurrentSliceNum--;
        this->Viewer->SetSlice(CurrentSliceNum);

        this->Viewer->GetRenderer()->ResetCamera();  // need

    }
    void OnLeftButtonDown() override {

      
        this->Interactor->GetPicker()->Pick(this->Interactor->GetEventPosition()[0],
            this->Interactor->GetEventPosition()[1],
            0,  // always zero.
            this->Interactor->GetRenderWindow()->GetRenderers()->GetFirstRenderer());
        double world_pos[3];
        this->Interactor->GetPicker()->GetPickPosition(world_pos);
      
        point_tempx[0] = (world_pos[0] - origin[0]) / Spacing[0];
        point_tempx[1] = (world_pos[1] - origin[1]) / Spacing[1];
        point_tempx[2] = (world_pos[2] - origin[2]) / Spacing[2];
        
        this->Viewer->GetRenderWindow()->GetInteractor()->Render();
      
        vtkInteractorStyleTrackballCamera::OnLeftButtonDown();

    }
    void OnKeyDown() override {
        std::string key = this->GetInteractor()->GetKeySym();
        if (key.compare("Left") == 0)
        {
           // do something
        }



    }


    ~Interactor() {}
};
vtkStandardNewMacro(Interactor);
#include <vtkPointPicker.h>
#include"itkImageToVTKImageFilter.h"
int main() {
   // read dcm 
  //also can be read using vtk
   std::string dicom_path = "D:/xiaoxue/CTdata/mask/3Dircadb1.14/PATIENT_DICOM";
   ImageType::Pointer inputImg = LoadDicom<ImageType>(dicom_path);

    typedef itk::ImageToVTKImageFilter< ImageType > itkTovtkFilterType;
    auto itkTovtkImageFilter_Liver = itkTovtkFilterType::New();
    itkTovtkImageFilter_Liver->SetInput(inputImg);
    itkTovtkImageFilter_Liver->Update();


    vtkNew<vtkPointPicker> pointPicker;
    vtkSmartPointer<vtkImageViewer2> viewer =
        vtkSmartPointer<vtkImageViewer2>::New();
    viewer->SetInputData(itkTovtkImageFilter_Liver->GetOutput());
    viewer->SetSize(800, 800);
    viewer->SetSliceOrientationToXY();
  
    viewer->GetRenderer()->SetBackground(1, 1, 1);

    vtkSmartPointer<vtkRenderWindowInteractor> rwi =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
    rwi->SetPicker(pointPicker);
    viewer->SetupInteractor(rwi);
    vtkSmartPointer<Interactor> imagestyle =
        vtkSmartPointer<Interactor>::New();
    imagestyle->SetViewer(viewer);
    imagestyle->SetImage(inputImg);


    rwi->SetInteractorStyle(imagestyle);
  
    viewer->Render();
    rwi->Start();

    return 0;
}