dox/Graphics/vtkPolyDataConnectivityFilter.h

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

  Program:   Visualization Toolkit
  Module:    vtkPolyDataConnectivityFilter.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 __vtkPolyDataConnectivityFilter_h
#define __vtkPolyDataConnectivityFilter_h

#include "vtkPolyDataAlgorithm.h"

#define VTK_EXTRACT_POINT_SEEDED_REGIONS 1
#define VTK_EXTRACT_CELL_SEEDED_REGIONS 2
#define VTK_EXTRACT_SPECIFIED_REGIONS 3
#define VTK_EXTRACT_LARGEST_REGION 4
#define VTK_EXTRACT_ALL_REGIONS 5
#define VTK_EXTRACT_CLOSEST_POINT_REGION 6

class vtkDataArray;
class vtkIdList;
class vtkIdTypeArray;

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


  vtkGetObjectMacro(RegionSizes,vtkIdTypeArray);

  static vtkPolyDataConnectivityFilter *New();


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


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


  vtkSetVector2Macro(ScalarRange,double);
  vtkGetVector2Macro(ScalarRange,double);


  vtkSetClampMacro(ExtractionMode,int,
                   VTK_EXTRACT_POINT_SEEDED_REGIONS,
                   VTK_EXTRACT_CLOSEST_POINT_REGION);
  vtkGetMacro(ExtractionMode,int);
  void SetExtractionModeToPointSeededRegions()
    {this->SetExtractionMode(VTK_EXTRACT_POINT_SEEDED_REGIONS);};
  void SetExtractionModeToCellSeededRegions()
    {this->SetExtractionMode(VTK_EXTRACT_CELL_SEEDED_REGIONS);};
  void SetExtractionModeToLargestRegion()
    {this->SetExtractionMode(VTK_EXTRACT_LARGEST_REGION);};
  void SetExtractionModeToSpecifiedRegions()
    {this->SetExtractionMode(VTK_EXTRACT_SPECIFIED_REGIONS);};
  void SetExtractionModeToClosestPointRegion()
    {this->SetExtractionMode(VTK_EXTRACT_CLOSEST_POINT_REGION);};
  void SetExtractionModeToAllRegions()
    {this->SetExtractionMode(VTK_EXTRACT_ALL_REGIONS);};
  const char *GetExtractionModeAsString();

  void InitializeSeedList();

  void AddSeed(int id);

  void DeleteSeed(int id);

  void InitializeSpecifiedRegionList();

  void AddSpecifiedRegion(int id);

  void DeleteSpecifiedRegion(int id);


  vtkSetVector3Macro(ClosestPoint,double);
  vtkGetVectorMacro(ClosestPoint,double,3);

  int GetNumberOfExtractedRegions();


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


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


  vtkGetObjectMacro( VisitedPointIds, vtkIdList );

protected:
  vtkPolyDataConnectivityFilter();
  ~vtkPolyDataConnectivityFilter();

  // Usual data generation method
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);

  int ColorRegions; //boolean turns on/off scalar gen for separate regions
  int ExtractionMode; //how to extract regions
  vtkIdList *Seeds; //id's of points or cells used to seed regions
  vtkIdList *SpecifiedRegionIds; //regions specified for extraction
  vtkIdTypeArray *RegionSizes; //size (in cells) of each region extracted

  double ClosestPoint[3];

  int ScalarConnectivity;
  int FullScalarConnectivity;

  // Does this cell qualify as being scalar connected ?
  int IsScalarConnected( vtkIdType cellId );

  double ScalarRange[2];

  void TraverseAndMark();

  // used to support algorithm execution
  vtkDataArray *CellScalars;
  vtkIdList *NeighborCellPointIds;
  vtkIdType *Visited;
  vtkIdType *PointMap;
  vtkDataArray *NewScalars;
  vtkIdType RegionNumber;
  vtkIdType PointNumber;
  vtkIdType NumCellsInRegion;
  vtkDataArray *InScalars;
  vtkPolyData *Mesh;
  vtkIdList *Wave;
  vtkIdList *Wave2;
  vtkIdList *PointIds;
  vtkIdList *CellIds;
  vtkIdList *VisitedPointIds;

  int MarkVisitedPointIds;

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


inline const char *vtkPolyDataConnectivityFilter::GetExtractionModeAsString(void)
{
  if ( this->ExtractionMode == VTK_EXTRACT_POINT_SEEDED_REGIONS )
    {
    return "ExtractPointSeededRegions";
    }
  else if ( this->ExtractionMode == VTK_EXTRACT_CELL_SEEDED_REGIONS )
    {
    return "ExtractCellSeededRegions";
    }
  else if ( this->ExtractionMode == VTK_EXTRACT_SPECIFIED_REGIONS )
    {
    return "ExtractSpecifiedRegions";
    }
  else if ( this->ExtractionMode == VTK_EXTRACT_ALL_REGIONS )
    {
    return "ExtractAllRegions";
    }
  else if ( this->ExtractionMode == VTK_EXTRACT_CLOSEST_POINT_REGION )
    {
    return "ExtractClosestPointRegion";
    }
  else
    {
    return "ExtractLargestRegion";
    }
}


#endif