RubberBand2D
VTKExamples/Cxx/Interaction/RubberBand2D
Description¶
This example shows how to get the coordinates of the corners of the rubber band (the box that is drawn).
Code¶
RubberBand2D.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 <vtkObjectFactory.h> class MyRubberBand : public vtkInteractorStyleRubberBand2D { public: static MyRubberBand* New(); vtkTypeMacro(MyRubberBand, vtkInteractorStyleRubberBand2D); virtual void OnLeftButtonUp() { // Forward events vtkInteractorStyleRubberBand2D::OnLeftButtonUp(); std::cout << "Start position: " << this->StartPosition[0] << " " << this->StartPosition[1] << std::endl; std::cout << "End position: " << this->EndPosition[0] << " " << this->EndPosition[1] << std::endl; } }; vtkStandardNewMacro(MyRubberBand); 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 // Render renderWindow->Render(); vtkSmartPointer<MyRubberBand> style = vtkSmartPointer<MyRubberBand>::New(); renderWindowInteractor->SetInteractorStyle( style ); // Begin mouse interaction renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(RubberBand2D) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(RubberBand2D MACOSX_BUNDLE RubberBand2D.cxx) target_link_libraries(RubberBand2D ${VTK_LIBRARIES})
Download and Build RubberBand2D¶
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 RubberBand2D and its CMakeLists.txt file. Once the tarball RubberBand2D.tar has been downloaded and extracted,
cd RubberBand2D/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:
./RubberBand2D
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.