vtkFollower.h

Go to the documentation of this file.

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

  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) override;

  static vtkFollower *New();


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


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

  vtkTypeBool HasTranslucentPolygonalGeometry() override;

  void ReleaseGraphicsResources(vtkWindow*) override;

  void ComputeMatrix() override;

  void ShallowCopy(vtkProp *prop) override;

protected:
  vtkFollower();
  ~vtkFollower() override;

  vtkCamera *Camera;
  vtkActor  *Device;

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

private:
  vtkFollower(const vtkFollower&) = delete;
  void operator=(const vtkFollower&) = delete;

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

#endif