vtkFitToHeightMapFilter.h

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

  Program:   Visualization Toolkit
  Module:    vtkFitToHeightMapFilter.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 vtkFitToHeightMapFilter_h
#define vtkFitToHeightMapFilter_h

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

class vtkImageData;

class VTKFILTERSMODELING_EXPORT vtkFitToHeightMapFilter : public vtkPolyDataAlgorithm
{
public:

  static vtkFitToHeightMapFilter *New();
  vtkTypeMacro(vtkFitToHeightMapFilter,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void SetHeightMapData(vtkImageData *idata);


  void SetHeightMapConnection(vtkAlgorithmOutput* algOutput);


  vtkImageData *GetHeightMap();
  vtkImageData *GetHeightMap(vtkInformationVector *sourceInfo);

  // Strategies to fit the polydata.
  enum FittingStrategy
  {
    POINT_PROJECTION=0,
    POINT_MINIMUM_HEIGHT=1,
    POINT_MAXIMUM_HEIGHT=2,
    POINT_AVERAGE_HEIGHT=3,
    CELL_MINIMUM_HEIGHT=4,
    CELL_MAXIMUM_HEIGHT=5,
    CELL_AVERAGE_HEIGHT=6,
  };


  vtkSetMacro(FittingStrategy,int);
  vtkGetMacro(FittingStrategy,int);
  void SetFittingStrategyToPointProjection()
    { this->SetFittingStrategy(POINT_PROJECTION); }
  void SetFittingStrategyToPointMinimumHeight()
    { this->SetFittingStrategy(POINT_MINIMUM_HEIGHT); }
  void SetFittingStrategyToPointMaximumHeight()
    { this->SetFittingStrategy(POINT_MAXIMUM_HEIGHT); }
  void SetFittingStrategyToAverageHeight()
    { this->SetFittingStrategy(POINT_AVERAGE_HEIGHT); }
  void SetFittingStrategyToCellMinimumHeight()
    { this->SetFittingStrategy(CELL_MINIMUM_HEIGHT); }
  void SetFittingStrategyToCellMaximumHeight()
    { this->SetFittingStrategy(CELL_MAXIMUM_HEIGHT); }
  void SetFittingStrategyToCellAverageHeight()
  { this->SetFittingStrategy(CELL_AVERAGE_HEIGHT); }


  vtkSetMacro(UseHeightMapOffset,vtkTypeBool);
  vtkGetMacro(UseHeightMapOffset,vtkTypeBool);
  vtkBooleanMacro(UseHeightMapOffset,vtkTypeBool);

protected:
  vtkFitToHeightMapFilter();
  ~vtkFitToHeightMapFilter() override;

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;
  int FillInputPortInformation(int, vtkInformation *) override;

  int FittingStrategy;
  vtkTypeBool UseHeightMapOffset;
  double Offset;

  void AdjustPoints(vtkPolyData *output, vtkIdType numCells, vtkPoints *newPts);
  void AdjustCells(vtkPolyData *output, vtkIdType numCells, double *cellHts,
                   vtkPoints *inPts, vtkPoints *newPts);

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

#endif