# ShareCameraQt

VTKExamples/Cxx/Qt/ShareCameraQt

### Code

ShareCameraQt.cxx

    #include "ShareCameraQt.h"

    #include <vtkDataObjectToTable.h>
    #include <vtkElevationFilter.h>
    #include <vtkGenericOpenGLRenderWindow.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkQtTableView.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkSphereSource.h>
    #include <vtkCubeSource.h>

    #include <vtkSmartPointer.h>

    // Constructor
    ShareCameraQt::ShareCameraQt()
    {
      this->setupUi(this);

      vtkNew<vtkGenericOpenGLRenderWindow> renderWindowLeft;
      this->qvtkWidgetLeft->SetRenderWindow(renderWindowLeft);
      vtkNew<vtkGenericOpenGLRenderWindow> renderWindowRight;
      this->qvtkWidgetRight->SetRenderWindow(renderWindowRight);

      // Sphere
      vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New();
      sphereSource->Update();
      vtkSmartPointer<vtkPolyDataMapper> sphereMapper =vtkSmartPointer<vtkPolyDataMapper>::New();
      sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
      vtkSmartPointer<vtkActor> sphereActor = vtkSmartPointer<vtkActor>::New();
      sphereActor->SetMapper(sphereMapper);

      // Cube
      vtkSmartPointer<vtkCubeSource> cubeSource = vtkSmartPointer<vtkCubeSource>::New();
      cubeSource->Update();
      vtkSmartPointer<vtkPolyDataMapper> cubeMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
      cubeMapper->SetInputConnection(cubeSource->GetOutputPort());
      vtkSmartPointer<vtkActor> cubeActor = vtkSmartPointer<vtkActor>::New();
      cubeActor->SetMapper(cubeMapper);

      // VTK Renderer
      vtkSmartPointer<vtkRenderer> leftRenderer = vtkSmartPointer<vtkRenderer>::New();
      leftRenderer->AddActor(sphereActor);

      vtkSmartPointer<vtkRenderer> rightRenderer = vtkSmartPointer<vtkRenderer>::New();

      // Add Actor to renderer
      rightRenderer->AddActor(cubeActor);

      // VTK/Qt wedded
      this->qvtkWidgetLeft->GetRenderWindow()->AddRenderer(leftRenderer);
      this->qvtkWidgetRight->GetRenderWindow()->AddRenderer(rightRenderer);

      rightRenderer->ResetCamera();
      leftRenderer->ResetCamera();

      rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera());

      // Set up action signals and slots
      connect(this->actionExit, SIGNAL(triggered()), this, SLOT(slotExit()));

      //this->qvtkWidgetLeft->GetRenderWindow()->AddObserver(vtkCommand::ModifiedEvent, this, &ShareCameraQt::ModifiedHandler);
      this->qvtkWidgetLeft->GetRenderWindow()->AddObserver(vtkCommand::AnyEvent, this, &ShareCameraQt::ModifiedHandler);

    }

    void ShareCameraQt::ModifiedHandler()
    {
      this->qvtkWidgetRight->GetRenderWindow()->Render();
    }

    void ShareCameraQt::slotExit()
    {
      qApp->exit();
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ShareCameraQt)

    find_package(VTK REQUIRED)
    include(${VTK_USE_FILE})

    add_executable(ShareCameraQt MACOSX_BUNDLE ShareCameraQt.cxx )

    target_link_libraries(ShareCameraQt ${VTK_LIBRARIES})

### Download and Build ShareCameraQt

Click here to download ShareCameraQt and its CMakeLists.txt file. Once the tarball ShareCameraQt.tar has been downloaded and extracted,

    cd ShareCameraQt/build

If VTK is installed:

    cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

    cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

    make

and run it:

    ./ShareCameraQt

WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.