CameraModifiedEvent
VTKExamples/Cxx/Utilities/CameraModifiedEvent
Code¶
CameraModifiedEvent.cxx
#include <vtkSphereSource.h> #include <vtkPolyData.h> #include <vtkSmartPointer.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkCamera.h> #include <vtkCallbackCommand.h> static void CameraModifiedCallback(vtkObject* caller, long unsigned int vtkNotUsed(eventId), void* vtkNotUsed(clientData), void* vtkNotUsed(callData) ) { std::cout << caller->GetClassName() << " modified" << std::endl; vtkCamera* camera = static_cast<vtkCamera*>(caller); // print the interesting stuff std::cout << "\tPosition: " << camera->GetPosition()[0] << ", " << camera->GetPosition()[1] << ", " << camera->GetPosition()[2] << std::endl; std::cout << "\tFocal point: " << camera->GetFocalPoint()[0] << ", " << camera->GetFocalPoint()[1] << ", " << camera->GetFocalPoint()[2] << std::endl; } int main(int, char *[]) { // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actor to the scene renderer->AddActor(actor); renderer->SetBackground(.1, .3, .5); vtkSmartPointer<vtkCallbackCommand> modifiedCallback = vtkSmartPointer<vtkCallbackCommand>::New(); modifiedCallback->SetCallback (CameraModifiedCallback); renderer->ResetCamera(); renderer->GetActiveCamera()->AddObserver(vtkCommand::ModifiedEvent,modifiedCallback); // Render and interact renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(CameraModifiedEvent) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(CameraModifiedEvent MACOSX_BUNDLE CameraModifiedEvent.cxx) target_link_libraries(CameraModifiedEvent ${VTK_LIBRARIES})
Download and Build CameraModifiedEvent¶
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 CameraModifiedEvent and its CMakeLists.txt file. Once the tarball CameraModifiedEvent.tar has been downloaded and extracted,
cd CameraModifiedEvent/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:
./CameraModifiedEvent
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.