vtkExtentSplitter.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkExtentSplitter.h,v $

  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 __vtkExtentSplitter_h
#define __vtkExtentSplitter_h

#include "vtkObject.h"

class vtkExtentSplitterInternals;

class VTK_COMMON_EXPORT vtkExtentSplitter : public vtkObject
{
public:
  vtkTypeRevisionMacro(vtkExtentSplitter,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);  
  static vtkExtentSplitter *New();
  

  void AddExtentSource(int id, int priority, int x0, int x1,
                       int y0, int y1, int z0, int z1);
  void AddExtentSource(int id, int priority, int* extent);
  void RemoveExtentSource(int id);
  void RemoveAllExtentSources();
  

  void AddExtent(int x0, int x1, int y0, int y1, int z0, int z1);
  void AddExtent(int* extent);
  
  int ComputeSubExtents();
  
  int GetNumberOfSubExtents();
  

  int* GetSubExtent(int index);
  void GetSubExtent(int index, int* extent);
  
  int GetSubExtentSource(int index);  
  

  vtkGetMacro(PointMode, int);
  vtkSetMacro(PointMode, int);
  vtkBooleanMacro(PointMode, int);
  
protected:
  vtkExtentSplitter();
  ~vtkExtentSplitter();
  
  // Internal utility methods.
  void SplitExtent(int* extent, int* subextent);
  int IntersectExtents(const int* extent1, const int* extent2, int* result);
  int Min(int a, int b);
  int Max(int a, int b);
  
  // Internal implementation data.
  vtkExtentSplitterInternals* Internal;
  
  // On if reading only all points (but not always all cells) is
  // necessary.  Used for reading volumes of planar slices storing
  // only point data.
  int PointMode;
  
private:
  vtkExtentSplitter(const vtkExtentSplitter&);  // Not implemented.
  void operator=(const vtkExtentSplitter&);  // Not implemented.
};

#endif

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