RubberBand2DObserver
VTKExamples/Cxx/Interaction/RubberBand2DObserver
Code¶
RubberBand2DObserver.cxx
#include <vtkSmartPointer.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkInteractorStyleRubberBand2D.h> #include <vtkCallbackCommand.h> void SelectionChangedCallbackFunction( vtkObject* caller, long unsigned int eventId, void* clientData, void* callData ); int main(int, char *[]) { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // A renderer and render window vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); // An interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actors to the scene renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white renderWindow->Render(); vtkSmartPointer<vtkCallbackCommand> selectionChangedCallback = vtkSmartPointer<vtkCallbackCommand>::New(); selectionChangedCallback->SetCallback ( SelectionChangedCallbackFunction ); vtkSmartPointer<vtkInteractorStyleRubberBand2D> style = vtkSmartPointer<vtkInteractorStyleRubberBand2D>::New(); style->AddObserver ( vtkCommand::SelectionChangedEvent, selectionChangedCallback ); renderWindowInteractor->SetInteractorStyle( style ); // Begin mouse interaction renderWindowInteractor->Start(); return EXIT_SUCCESS; } void SelectionChangedCallbackFunction ( vtkObject* vtkNotUsed(caller), long unsigned int vtkNotUsed(eventId), void* vtkNotUsed(clientData), void* callData ) { std::cout << "SelectionChanged callback" << std::endl; unsigned int* rect = reinterpret_cast<unsigned int*> ( callData ); unsigned int pos1X = rect[0]; unsigned int pos1Y = rect[1]; unsigned int pos2X = rect[2]; unsigned int pos2Y = rect[3]; std::cout << "Start x: " << pos1X << " Start y: " << pos1Y << " End x: " << pos2X << " End y: " << pos2Y << std::endl; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(RubberBand2DObserver) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(RubberBand2DObserver MACOSX_BUNDLE RubberBand2DObserver.cxx) target_link_libraries(RubberBand2DObserver ${VTK_LIBRARIES})
Download and Build RubberBand2DObserver¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download RubberBand2DObserver and its CMakeLists.txt file. Once the tarball RubberBand2DObserver.tar has been downloaded and extracted,
cd RubberBand2DObserver/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:
./RubberBand2DObserver
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.