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
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.