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)

if(POLICY CMP0020)
  cmake_policy(SET CMP0020 NEW)
endif()

PROJECT(ShareCameraQt)

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

if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
  # Instruct CMake to run moc automatically when needed.
  set(CMAKE_AUTOMOC ON)
  find_package(Qt5Widgets REQUIRED QUIET)
else()
  find_package(Qt4 REQUIRED)
  include(${QT_USE_FILE})
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})

file(GLOB UI_FILES *.ui)
file(GLOB QT_WRAP *.h)
file(GLOB CXX_FILES *.cxx)

if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
  qt5_wrap_ui(UISrcs ${UI_FILES} )
  # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
  add_executable(ShareCameraQt MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(ShareCameraQt Core Gui)
  target_link_libraries(ShareCameraQt ${VTK_LIBRARIES})
else()
  QT4_WRAP_UI(UISrcs ${UI_FILES})
  QT4_WRAP_CPP(MOCSrcs ${QT_WRAP})
  add_executable(ShareCameraQt MACOSX_BUNDLE ${CXX_FILES} ${UISrcs} ${MOCSrcs})
  target_link_libraries(ShareCameraQt ${VTK_LIBRARIES})
endif()

Download and Build ShareCameraQt¶

Click [https://github.com/lorensen/VTKWikiExamplesTarballs/raw/master/ShareCameraQt.tar here to download ShareCameraQt]. and its CMakeLists.txt file.

Once the tarball ShareCameraQt.tar has been downloaded and extracted,

 cd ShareCameraQt/build

This example requires Qt and VTK.

If VTK and Qt are 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 ..

If Qt is not found on your system, you will need to tell CMake where to find qmake:

cmake -DQT_QMAKE_EXECUTABLE:FILEPATH=/usr/something/qmake  ..

Build the project:

make

and run it:

./ShareCameraQt

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time. You may also need to add a Qt related path.