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
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.