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

  Program:   Visualization Toolkit
  Module:    vtkEmptyCell.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.

=========================================================================*/
/**
 * @class   vtkEmptyCell
 * @brief   an empty cell used as a place-holder during processing
 *
 * vtkEmptyCell is a concrete implementation of vtkCell. It is used
 * during processing to represented a deleted element.
 */

#ifndef vtkEmptyCell_h
#define vtkEmptyCell_h

#include "vtkCell.h"
#include "vtkCommonDataModelModule.h" // For export macro

class VTKCOMMONDATAMODEL_EXPORT vtkEmptyCell : public vtkCell
{
public:
  static vtkEmptyCell* New();
  vtkTypeMacro(vtkEmptyCell, vtkCell);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  //@{
  /**
   * See the vtkCell API for descriptions of these methods.
   */
  int GetCellType() override { return VTK_EMPTY_CELL; }
  int GetCellDimension() override { return 0; }
  int GetNumberOfEdges() override { return 0; }
  int GetNumberOfFaces() override { return 0; }
  vtkCell* GetEdge(int) override { return nullptr; }
  vtkCell* GetFace(int) override { return nullptr; }
  int CellBoundary(int subId, const double pcoords[3], vtkIdList* pts) override;
  void Contour(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
    vtkCellArray* verts1, vtkCellArray* lines, vtkCellArray* verts2, vtkPointData* inPd,
    vtkPointData* outPd, vtkCellData* inCd, vtkIdType cellId, vtkCellData* outCd) override;
  void Clip(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
    vtkCellArray* pts, vtkPointData* inPd, vtkPointData* outPd, vtkCellData* inCd, vtkIdType cellId,
    vtkCellData* outCd, int insideOut) override;
  //@}

  int EvaluatePosition(const double x[3], double closestPoint[3], int& subId, double pcoords[3],
    double& dist2, double weights[]) override;
  void EvaluateLocation(int& subId, const double pcoords[3], double x[3], double* weights) override;
  int IntersectWithLine(const double p1[3], const double p2[3], double tol, double& t, double x[3],
    double pcoords[3], int& subId) override;
  int Triangulate(int index, vtkIdList* ptIds, vtkPoints* pts) override;
  void Derivatives(
    int subId, const double pcoords[3], const double* values, int dim, double* derivs) override;

protected:
  vtkEmptyCell() = default;
  ~vtkEmptyCell() override = default;

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

#endif
