vtkFollower.h

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

  Program:   Visualization Toolkit
  Module:    vtkFollower.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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.

=========================================================================*/
#ifndef vtkFollower_h
#define vtkFollower_h

#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkActor.h"

class vtkCamera;

class VTKRENDERINGCORE_EXPORT vtkFollower : public vtkActor
{
 public:
  vtkTypeMacro(vtkFollower,vtkActor);
  void PrintSelf(ostream& os, vtkIndent indent);

  static vtkFollower *New();


  virtual void SetCamera(vtkCamera*);
  vtkGetObjectMacro(Camera, vtkCamera);


  virtual int RenderOpaqueGeometry(vtkViewport *viewport);
  virtual int RenderTranslucentPolygonalGeometry(vtkViewport *viewport);
  virtual void Render(vtkRenderer *ren);

  virtual int HasTranslucentPolygonalGeometry();

  virtual void ReleaseGraphicsResources(vtkWindow*);

  virtual void ComputeMatrix();

  void ShallowCopy(vtkProp *prop);

protected:
  vtkFollower();
  ~vtkFollower();

  vtkCamera *Camera;
  vtkActor  *Device;

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

  // hide the two parameter Render() method from the user and the compiler.
  virtual void Render(vtkRenderer *, vtkMapper *) {}

  //Internal matrices to avoid New/Delete for performance reasons
  vtkMatrix4x4 *InternalMatrix;
};

#endif