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

  Program:   ParaView
  Module:    vtkPVRampKeyFrame.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.

=========================================================================*/
/**
 * @class   vtkPVRampKeyFrame
 *
 * Interplates lineraly between consequtive key frames.
*/

#ifndef vtkPVRampKeyFrame_h
#define vtkPVRampKeyFrame_h

#include "vtkPVKeyFrame.h"

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

  /**
   * This method will do the actual interpolation.
   * currenttime is normalized to the time range between
   * this key frame and the next key frame.
   */
  virtual void UpdateValue(double currenttime, vtkPVAnimationCue* cue, vtkPVKeyFrame* next);

protected:
  vtkPVRampKeyFrame();
  ~vtkPVRampKeyFrame();

private:
  vtkPVRampKeyFrame(const vtkPVRampKeyFrame&) VTK_DELETE_FUNCTION;
  void operator=(const vtkPVRampKeyFrame&) VTK_DELETE_FUNCTION;
};

#endif
