VTK/Examples/Cxx/Visualization/CameraActor

#include <vtkSphereSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkSmartPointer.h>
#include <vtkCamera.h>
#include <vtkPlanes.h>
#include <vtkMapper.h>
#include <vtkCameraActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
 
int main(int, char *[])
{
  // Sphere
  vtkSmartPointer<vtkSphereSource> sphereSource = 
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->SetRadius(400);
  sphereSource->Update();
 
  vtkSmartPointer<vtkPolyDataMapper> sphereMapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
  vtkSmartPointer<vtkActor> sphereActor = 
    vtkSmartPointer<vtkActor>::New();
  sphereActor->SetMapper(sphereMapper);
 
  // Camera
  vtkSmartPointer<vtkCamera> camera = 
    vtkSmartPointer<vtkCamera>::New();
 
  vtkSmartPointer<vtkCameraActor> cameraActor = 
    vtkSmartPointer<vtkCameraActor>::New();
  cameraActor->SetCamera(camera);
 
  // (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
  double* bounds = new double[6];
  bounds = cameraActor->GetBounds();
  std::cout << "bounds: " << bounds[0] << " " << bounds[1] << " " << bounds[2] << " " << 
      bounds[3] << " " << bounds[4] << " " << bounds[5] << std::endl;
 
  // Visualize
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
 
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  renderer->AddActor(cameraActor);
  renderer->AddActor(sphereActor);
 
  renderer->SetBackground(1,1,1); // Background color white
  renderWindow->Render();
  renderWindowInteractor->Start();
 
 return EXIT_SUCCESS;
}