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

  Program:   Visualization Toolkit
  Module:    vtkExtractHierarchicalBins.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See LICENSE file 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.

=========================================================================*/
/**
 * @class   vtkExtractHierarchicalBins
 * @brief   manipulate the output of
 * vtkHierarchicalBinningFilter
 *
 *
 * vtkExtractHierarchicalBins enables users to extract data from the output
 * of vtkHierarchicalBinningFilter. Points at a particular level, or at a
 * level and bin number, can be filtered to the output. To perform these
 * operations, the output must contain points sorted into bins (the
 * vtkPoints), with offsets pointing to the beginning of each bin (a
 * vtkFieldData array named "BinOffsets").
 *
 *
 * @warning
 * This class has been threaded with vtkSMPTools. Using TBB or other
 * non-sequential type (set in the CMake variable
 * VTK_SMP_IMPLEMENTATION_TYPE) may improve performance significantly.
 *
 * @sa
 * vtkFiltersPointsFilter vtkRadiusOutlierRemoval vtkStatisticalOutlierRemoval
 * vtkThresholdPoints vtkImplicitFunction vtkExtractGeometry
 * vtkFitImplicitFunction
 */

#ifndef vtkExtractHierarchicalBins_h
#define vtkExtractHierarchicalBins_h

#include "vtkFiltersPointsModule.h" // For export macro
#include "vtkPointCloudFilter.h"

class vtkHierarchicalBinningFilter;
class vtkPointSet;

class VTKFILTERSPOINTS_EXPORT vtkExtractHierarchicalBins : public vtkPointCloudFilter
{
public:
  ///@{
  /**
   * Standard methods for instantiating, obtaining type information, and
   * printing information.
   */
  static vtkExtractHierarchicalBins* New();
  vtkTypeMacro(vtkExtractHierarchicalBins, vtkPointCloudFilter);
  void PrintSelf(ostream& os, vtkIndent indent) override;
  ///@}

  ///@{
  /**
   * Specify the level to extract. If non-negative, with a negative bin
   * number, then all points at this level are extracted and sent to the
   * output. If negative, then the points from the specified bin are sent to
   * the output. If both the level and bin number are negative values, then
   * the input is sent to the output. By default the 0th level is
   * extracted. Note that requesting a level greater than the associated
   * vtkHierarchicalBinningFilter will clamp the level to the maximum
   * possible level of the binning filter.
   */
  vtkSetMacro(Level, int);
  vtkGetMacro(Level, int);
  ///@}

  ///@{
  /**
   * Specify the bin number to extract. If a non-negative value, then the
   * points from the bin number specified are extracted. If negative, then
   * entire levels of points are extacted (assuming the Level is
   * non-negative). Note that the bin tree is flattened, a particular bin
   * number may refer to a bin on any level. Note that requesting a bin
   * greater than the associated vtkHierarchicalBinningFilter will clamp the
   * bin to the maximum possible bin of the binning filter.
   */
  vtkSetMacro(Bin, int);
  vtkGetMacro(Bin, int);
  ///@}

  ///@{
  /**
   * Specify the vtkHierarchicalBinningFilter to query for relevant
   * information. Make sure that this filter has executed prior to the execution of
   * this filter. (This is generally a safe bet if connected in a pipeline.)
   */
  virtual void SetBinningFilter(vtkHierarchicalBinningFilter*);
  vtkGetObjectMacro(BinningFilter, vtkHierarchicalBinningFilter);
  ///@}

protected:
  vtkExtractHierarchicalBins();
  ~vtkExtractHierarchicalBins() override;

  // Users can extract points from a particular level or bin.
  int Level;
  int Bin;
  vtkHierarchicalBinningFilter* BinningFilter;

  // for the binning filter
  void ReportReferences(vtkGarbageCollector*) override;

  // All derived classes must implement this method. Note that a side effect of
  // the class is to populate the PointMap. Zero is returned if there is a failure.
  int FilterPoints(vtkPointSet* input) override;

private:
  vtkExtractHierarchicalBins(const vtkExtractHierarchicalBins&) = delete;
  void operator=(const vtkExtractHierarchicalBins&) = delete;
};

#endif
