/*=========================================================================

  Program:   ParaView
  Module:    vtkPVCameraKeyFrame.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME vtkPVCameraKeyFrame
// .SECTION Description
// Special key frame for animating Camera. Unlike typical keyframes,
// this keyframe interpolates a camera and not a property on the camera.

#ifndef __vtkPVCameraKeyFrame_h
#define __vtkPVCameraKeyFrame_h

#include "vtkPVAnimationModule.h" //needed for exports
#include "vtkPVKeyFrame.h"

class vtkCamera;
class vtkCameraInterpolator2;
class vtkPVAnimationCue;

class VTKPVANIMATION_EXPORT vtkPVCameraKeyFrame : public vtkPVKeyFrame
{
public:
  static vtkPVCameraKeyFrame* New();
  vtkTypeMacro(vtkPVCameraKeyFrame, vtkPVKeyFrame);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // If the vtkPVCameraCueManipulator is in CAMERA mode, then this method is
  // not even called since the interpolation is done by vtkCameraInterpolator
  // maintained by vtkPVCameraCueManipulator itself. However,  in PATH mode,
  // this method is called to allow the key frame to use vtkCameraInterpolator2
  // to do path-based interpolations for the camera.
  virtual void UpdateValue(
    double currenttime, vtkPVAnimationCue* cue, vtkPVKeyFrame* next);

  // Overridden, since these methods are not supported by this class.
  virtual void SetKeyValue(unsigned int , double ) { }
  virtual void SetKeyValue(double ) { }
  virtual double GetKeyValue(unsigned int) {return 0;}

  // Description:
  // Get the camera i.e. the key value for this key frame.
  vtkGetObjectMacro(Camera, vtkCamera);

  // Description:
  // Methods to set the current camera value.
  void SetPosition(double x, double y, double z);
  void SetFocalPoint(double x, double y, double z);
  void SetViewUp(double x, double y, double z);
  void SetViewAngle(double angle);
  void SetParallelScale(double scale);

  // Description:
  // Forwarded to vtkCameraInterpolator2.
  void AddPositionPathPoint(double x, double y, double z);
  void ClearPositionPath();
  void AddFocalPathPoint(double x, double y, double z);
  void ClearFocalPath();
  void SetFocalPointMode(int val);
  void SetPositionMode(int val);
  void SetClosedFocalPath(bool val);
  void SetClosedPositionPath(bool val);

protected:
  vtkPVCameraKeyFrame();
  ~vtkPVCameraKeyFrame();

  vtkCamera* Camera;
  vtkCameraInterpolator2* Interpolator;

private:
  vtkPVCameraKeyFrame(const vtkPVCameraKeyFrame&); // Not implemented.
  void operator=(const vtkPVCameraKeyFrame&); // Not implemented.
};


#endif
