ClientData
VTKExamples/Cxx/Interaction/ClientData
Code¶
ClientData.cxx
#include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkCallbackCommand.h> #include <vtkCommand.h> static void KeypressCallbackFunction ( vtkObject* caller, long unsigned int eventId, void* clientData, void* callData ); int main(int, char *[]) { // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(0.0, 0.0, 0.0); sphereSource->SetRadius(5.0); sphereSource->Update(); vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); // Create an actor 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); vtkSmartPointer<vtkCallbackCommand> keypressCallback = vtkSmartPointer<vtkCallbackCommand>::New(); // Allow the observer to access the sphereSource keypressCallback->SetClientData(sphereSource); keypressCallback->SetCallback(KeypressCallbackFunction ); renderWindowInteractor->AddObserver(vtkCommand::KeyPressEvent, keypressCallback); renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; } void KeypressCallbackFunction(vtkObject*, long unsigned int vtkNotUsed(eventId), void* clientData, void* vtkNotUsed(callData) ) { // Prove that we can access the sphere source vtkSphereSource* sphereSource = static_cast<vtkSphereSource*>(clientData); std::cout << "Radius is " << sphereSource->GetRadius() << std::endl; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ClientData) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ClientData MACOSX_BUNDLE ClientData.cxx) target_link_libraries(ClientData ${VTK_LIBRARIES})
Download and Build ClientData¶
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 ClientData and its CMakeLists.txt file. Once the tarball ClientData.tar has been downloaded and extracted,
cd ClientData/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:
./ClientData
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.