SelectAnActor
VTKExamples/Cxx/Interaction/SelectAnActor
Code¶
SelectAnActor.cxx
#include <vtkSmartPointer.h> #include <vtkActor.h> #include <vtkCellArray.h> #include <vtkInteractorStyleTrackballActor.h> #include <vtkObjectFactory.h> #include <vtkCubeSource.h> #include <vtkSphereSource.h> #include <vtkPoints.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkPropPicker.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> // Handle mouse events class MouseInteractorStyle5 : public vtkInteractorStyleTrackballActor { public: static MouseInteractorStyle5* New(); vtkTypeMacro(MouseInteractorStyle5, vtkInteractorStyleTrackballActor); virtual void OnLeftButtonDown() { // Forward events vtkInteractorStyleTrackballActor::OnLeftButtonDown(); if(this->InteractionProp == this->Cube) { std::cout << "Picked cube." << std::endl; } else if(this->InteractionProp == this->Sphere) { std::cout << "Picked sphere." << std::endl; } } vtkActor* Cube; vtkActor* Sphere; }; vtkStandardNewMacro(MouseInteractorStyle5); int main(int, char *[]) { // Create a 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); // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(5,0,0); sphereSource->Update(); // Create a mapper vtkSmartPointer<vtkPolyDataMapper> sphereMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); sphereMapper->SetInputConnection(sphereSource->GetOutputPort()); // Create an actor vtkSmartPointer<vtkActor> sphereActor = vtkSmartPointer<vtkActor>::New(); sphereActor->SetMapper(sphereMapper); // 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); // Set the custom stype to use for interaction. vtkSmartPointer<MouseInteractorStyle5> style = vtkSmartPointer<MouseInteractorStyle5>::New(); style->SetDefaultRenderer(renderer); style->Cube = cubeActor; style->Sphere = sphereActor; renderWindowInteractor->SetInteractorStyle(style); renderer->AddActor(cubeActor); renderer->AddActor(sphereActor); renderer->SetBackground(0,0,1); // Render and interact renderWindow->Render(); renderWindowInteractor->Initialize(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(SelectAnActor) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(SelectAnActor MACOSX_BUNDLE SelectAnActor.cxx) target_link_libraries(SelectAnActor ${VTK_LIBRARIES})
Download and Build SelectAnActor¶
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 SelectAnActor and its CMakeLists.txt file. Once the tarball SelectAnActor.tar has been downloaded and extracted,
cd SelectAnActor/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:
./SelectAnActor
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.