vtkScalarTree.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkScalarTree.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 __vtkScalarTree_h
#define __vtkScalarTree_h

#include "vtkObject.h"

class vtkCell;
class vtkDataArray;
class vtkDataSet;
class vtkIdList;
class vtkTimeStamp;

class VTK_FILTERING_EXPORT vtkScalarTree : public vtkObject
{
public:
  vtkTypeRevisionMacro(vtkScalarTree,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);


  virtual void SetDataSet(vtkDataSet*);
  vtkGetObjectMacro(DataSet,vtkDataSet);

  virtual void BuildTree() = 0;
  
  virtual void Initialize() = 0;

  virtual void InitTraversal(double scalarValue) = 0;


  virtual vtkCell *GetNextCell(vtkIdType &cellId, vtkIdList* &ptIds,
                               vtkDataArray *cellScalars) = 0;

protected:
  vtkScalarTree();
  ~vtkScalarTree();

  vtkDataSet   *DataSet;    //the dataset over which the scalar tree is built
  vtkDataArray *Scalars;    //the scalars of the DataSet

  vtkTimeStamp BuildTime; //time at which tree was built
  double       ScalarValue; //current scalar value for traversal

  virtual void ReportReferences(vtkGarbageCollector*);

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

#endif

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