// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause

/**
 * @class   vtkDensifyPolyData
 * @brief   Densify the input by adding points at the
 * centroid
 *
 *
 * The filter takes any polygonal data as input and will tessellate cells that
 * are planar polygons present by fanning out triangles from its centroid.
 * Other cells are simply passed through to the output.  PointData, if present,
 * is interpolated via linear interpolation. CellData for any tessellated cell
 * is simply copied over from its parent cell. Planar polygons are assumed to
 * be convex. Funny things will happen if they are not.
 *
 * The number of subdivisions can be controlled by the parameter
 * NumberOfSubdivisions.
 */

#ifndef vtkDensifyPolyData_h
#define vtkDensifyPolyData_h

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

VTK_ABI_NAMESPACE_BEGIN
class VTKFILTERSGENERAL_EXPORT vtkDensifyPolyData : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkDensifyPolyData, vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
  static vtkDensifyPolyData* New();

  ///@{
  /**
   * Number of recursive subdivisions. Initial value is 1.
   */
  vtkSetMacro(NumberOfSubdivisions, unsigned int);
  vtkGetMacro(NumberOfSubdivisions, unsigned int);
  ///@}

protected:
  vtkDensifyPolyData();
  ~vtkDensifyPolyData() override;

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

  unsigned int NumberOfSubdivisions;

private:
  int FillInputPortInformation(int, vtkInformation*) override;

  vtkDensifyPolyData(const vtkDensifyPolyData&) = delete;
  void operator=(const vtkDensifyPolyData&) = delete;
};

VTK_ABI_NAMESPACE_END
#endif