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

  Program:   Visualization Toolkit
  Module:    vtkSelectVisiblePoints.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 vtkSelectVisiblePoints_h
#define vtkSelectVisiblePoints_h

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

class vtkRenderer;
class vtkMatrix4x4;

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

  static vtkSelectVisiblePoints *New();


  void SetRenderer(vtkRenderer* ren)
    {
      if (this->Renderer != ren)
        {
        this->Renderer = ren;
        this->Modified();
        }
    }
  vtkRenderer* GetRenderer()
    { return this->Renderer; }


  vtkSetMacro(SelectionWindow, int);
  vtkGetMacro(SelectionWindow, int);
  vtkBooleanMacro(SelectionWindow, int);


  vtkSetVector4Macro(Selection, int);
  vtkGetVectorMacro(Selection, int, 4);


  vtkSetMacro(SelectInvisible, int);
  vtkGetMacro(SelectInvisible, int);
  vtkBooleanMacro(SelectInvisible, int);


  vtkSetClampMacro(Tolerance, double,0.0, VTK_DOUBLE_MAX);
  vtkGetMacro(Tolerance, double);

  float * Initialize(bool getZbuff);

  bool IsPointOccluded(const double x[3], const float *zPtr);

  unsigned long GetMTime();

protected:
  vtkSelectVisiblePoints();
  ~vtkSelectVisiblePoints();

  virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  virtual int FillInputPortInformation(int port, vtkInformation *info);

  vtkRenderer *Renderer;
  vtkMatrix4x4 *CompositePerspectiveTransform;

  int SelectionWindow;
  int Selection[4];
  int InternalSelection[4];
  int SelectInvisible;
  double Tolerance;

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

#endif