[vtkusers] Set camera view along XY, XZ and YZ axis

[madz]

The problem is that if I rotate the 3d object and use function setPosition(),
the position changes according to the rotation. I don't want it to change
position according to the rotation.
Here is an example code,


#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkObjectFactory.h>
#include <vtkLabelPlacementMapper.h>
#include <vtkPointSetToLabelHierarchy.h>
#include <vtkStringArray.h>
#include <vtkLabeledDataMapper.h>
#include <vtkSmartPointer.h>
#include <vtkActor.h>
#include <vtkCubeSource.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

vtkSmartPointer<vtkRenderer> renderer;
 
class MouseInteractorStyle4 : public vtkInteractorStyleTrackballCamera
{
  public:
    static MouseInteractorStyle4* New();
    vtkTypeMacro(MouseInteractorStyle4, vtkInteractorStyleTrackballCamera);
	double p[3], f[3];
 
    virtual void OnLeftButtonDown() 
    {

      // Forward events
      vtkInteractorStyleTrackballCamera::OnLeftButtonDown();
    }
 
    virtual void OnMiddleButtonDown() 
    {
      std::cout << "Pressed middle mouse button." << std::endl;
      // Forward events
	  renderer->GetActiveCamera()->SetPosition(p[1],p[2],p[3]);
      vtkInteractorStyleTrackballCamera::OnMiddleButtonDown();
    }
 
    virtual void OnRightButtonDown() 
    {
      		
		renderer->GetActiveCamera()->GetPosition(p);
		renderer->GetActiveCamera()->GetFocalPoint(f);

			std::cout << "Position" <<p[0]<<" ,
"<<p[1]<<" , "<<p[2] << std::endl;
			std::cout  << "focal" <<f[0]<<" ,
"<<f[1]<<" , "<<f[2] << std::endl;
      vtkInteractorStyleTrackballCamera::OnRightButtonDown();
    }
 
};
 
vtkStandardNewMacro(MouseInteractorStyle4);



 
int main(int, char *[])
{
  // Create a cube.
  vtkSmartPointer<vtkCubeSource> cubeSource = 
    vtkSmartPointer<vtkCubeSource>::New();
  cubeSource->SetXLength(7);
  cubeSource->SetYLength(10);
  cubeSource->SetZLength(15);
 
  // Create a mapper and actor.
  vtkSmartPointer<vtkPolyDataMapper> mapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(cubeSource->GetOutputPort());
 
  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
 
  // Create a renderer, render window, and interactor
   renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  // Add the actors to the scene
  renderer->AddActor(actor);
  renderer->SetBackground(.3, .2, .1);


  vtkSmartPointer<MouseInteractorStyle4> style2 =
	  vtkSmartPointer<MouseInteractorStyle4>::New();
  renderWindowInteractor->SetInteractorStyle( style2 );

 
  // Render and interact
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}

First I press left button to store the position coordinates, then I rotate
the cube randomly and click the middle button to set position (the stored
position co-ordinates). The new position is different from the one I stored
the position from.
How do I solve this problem? Any help would be highly appreciated.



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