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

  Program:   Visualization Toolkit
  Module:    vtkBoxClipDataSet.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.

=========================================================================*/
/*----------------------------------------------------------------------------
 Copyright (c) Sandia Corporation
 See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/

/**
 * @class   vtkBoxClipDataSet
 * @brief   clip an unstructured grid
 *
 *
 * Clipping means that is actually 'cuts' through the cells of the dataset,
 * returning tetrahedral cells inside of the box.
 * The output of this filter is an unstructured grid.
 *
 * This filter can be configured to compute a second output. The
 * second output is the part of the cell that is clipped away. Set the
 * GenerateClippedData boolean on if you wish to access this output data.
 *
 * The vtkBoxClipDataSet will triangulate all types of 3D cells (i.e, create tetrahedra).
 * This is necessary to preserve compatibility across face neighbors.
 *
 * To use this filter,you can decide if you will be clipping with a box or a hexahedral box.
 * 1) Set orientation
 *    if(SetOrientation(0)): box (parallel with coordinate axis)
 *       SetBoxClip(xmin,xmax,ymin,ymax,zmin,zmax)
 *    if(SetOrientation(1)): hexahedral box (Default)
 *       SetBoxClip(n[0],o[0],n[1],o[1],n[2],o[2],n[3],o[3],n[4],o[4],n[5],o[5])
 *       PlaneNormal[] normal of each plane
 *       PlanePoint[] point on the plane
 * 2) Apply the GenerateClipScalarsOn()
 * 3) Execute clipping  Update();
 */

#ifndef vtkBoxClipDataSet_h
#define vtkBoxClipDataSet_h

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

class vtkCell3D;
class vtkCellArray;
class vtkCellData;
class vtkDataArray;
class vtkDataSetAttributes;
class vtkIdList;
class vtkGenericCell;
class vtkPointData;
class vtkIncrementalPointLocator;
class vtkPoints;

class VTKFILTERSGENERAL_EXPORT vtkBoxClipDataSet : public vtkUnstructuredGridAlgorithm
{
public:
  vtkTypeMacro(vtkBoxClipDataSet, vtkUnstructuredGridAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  /**
   * Constructor of the clipping box. The initial box is (0,1,0,1,0,1).
   * The hexahedral box and the parallel box parameters are set to match this
   * box.
   */
  static vtkBoxClipDataSet* New();

  ///@{
  /**
   * Specify the Box with which to perform the clipping.
   * If the box is not parallel to axis, you need to especify
   * normal vector of each plane and a point on the plane.
   */
  void SetBoxClip(double xmin, double xmax, double ymin, double ymax, double zmin, double zmax);
  void SetBoxClip(const double* n0, const double* o0, const double* n1, const double* o1,
    const double* n2, const double* o2, const double* n3, const double* o3, const double* n4,
    const double* o4, const double* n5, const double* o5);
  ///@}

  ///@{
  /**
   * If this flag is enabled, then the output scalar values will be
   * interpolated, and not the input scalar data.
   */
  vtkSetMacro(GenerateClipScalars, vtkTypeBool);
  vtkGetMacro(GenerateClipScalars, vtkTypeBool);
  vtkBooleanMacro(GenerateClipScalars, vtkTypeBool);
  ///@}

  ///@{
  /**
   * Control whether a second output is generated. The second output
   * contains the polygonal data that's been clipped away.
   */
  vtkSetMacro(GenerateClippedOutput, vtkTypeBool);
  vtkGetMacro(GenerateClippedOutput, vtkTypeBool);
  vtkBooleanMacro(GenerateClippedOutput, vtkTypeBool);
  ///@}

  /**
   * Set the tolerance for merging clip intersection points that are near
   * the vertices of cells. This tolerance is used to prevent the generation
   * of degenerate primitives. Note that only 3D cells actually use this
   * instance variable.
   * vtkSetClampMacro(MergeTolerance,double,0.0001,0.25);
   * vtkGetMacro(MergeTolerance,double);
   */

  ///@{
  /**
   * Return the Clipped output.
   */
  vtkUnstructuredGrid* GetClippedOutput();
  virtual int GetNumberOfOutputs();
  ///@}

  ///@{
  /**
   * Specify a spatial locator for merging points. By default, an
   * instance of vtkMergePoints is used.
   */
  void SetLocator(vtkIncrementalPointLocator* locator);
  vtkGetObjectMacro(Locator, vtkIncrementalPointLocator);
  ///@}

  /**
   * Create default locator. Used to create one when none is specified. The
   * locator is used to merge coincident points.
   */
  void CreateDefaultLocator();

  /**
   * Return the mtime also considering the locator.
   */
  vtkMTimeType GetMTime() override;

  ///@{
  /**
   * Tells if clipping happens with a box parallel with coordinate axis
   * (0) or with an hexahedral box (1). Initial value is 1.
   */
  vtkGetMacro(Orientation, unsigned int);
  vtkSetMacro(Orientation, unsigned int);
  ///@}

  static void InterpolateEdge(vtkDataSetAttributes* attributes, vtkIdType toId, vtkIdType fromId1,
    vtkIdType fromId2, double t);

  void MinEdgeF(const unsigned int* id_v, const vtkIdType* cellIds, unsigned int* edgF);
  void PyramidToTetra(
    const vtkIdType* pyramId, const vtkIdType* cellIds, vtkCellArray* newCellArray);
  void WedgeToTetra(const vtkIdType* wedgeId, const vtkIdType* cellIds, vtkCellArray* newCellArray);
  void CellGrid(
    vtkIdType typeobj, vtkIdType npts, const vtkIdType* cellIds, vtkCellArray* newCellArray);
  void CreateTetra(vtkIdType npts, const vtkIdType* cellIds, vtkCellArray* newCellArray);
  void ClipBox(vtkPoints* newPoints, vtkGenericCell* cell, vtkIncrementalPointLocator* locator,
    vtkCellArray* tets, vtkPointData* inPD, vtkPointData* outPD, vtkCellData* inCD,
    vtkIdType cellId, vtkCellData* outCD);
  void ClipHexahedron(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray* tets, vtkPointData* inPD,
    vtkPointData* outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData* outCD);
  void ClipBoxInOut(vtkPoints* newPoints, vtkGenericCell* cell, vtkIncrementalPointLocator* locator,
    vtkCellArray** tets, vtkPointData* inPD, vtkPointData** outPD, vtkCellData* inCD,
    vtkIdType cellId, vtkCellData** outCD);
  void ClipHexahedronInOut(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray** tets, vtkPointData* inPD,
    vtkPointData** outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData** outCD);

  void ClipBox2D(vtkPoints* newPoints, vtkGenericCell* cell, vtkIncrementalPointLocator* locator,
    vtkCellArray* tets, vtkPointData* inPD, vtkPointData* outPD, vtkCellData* inCD,
    vtkIdType cellId, vtkCellData* outCD);
  void ClipBoxInOut2D(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray** tets, vtkPointData* inPD,
    vtkPointData** outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData** outCD);
  void ClipHexahedron2D(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray* tets, vtkPointData* inPD,
    vtkPointData* outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData* outCD);
  void ClipHexahedronInOut2D(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray** tets, vtkPointData* inPD,
    vtkPointData** outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData** outCD);

  void ClipBox1D(vtkPoints* newPoints, vtkGenericCell* cell, vtkIncrementalPointLocator* locator,
    vtkCellArray* lines, vtkPointData* inPD, vtkPointData* outPD, vtkCellData* inCD,
    vtkIdType cellId, vtkCellData* outCD);
  void ClipBoxInOut1D(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray** lines, vtkPointData* inPD,
    vtkPointData** outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData** outCD);
  void ClipHexahedron1D(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray* lines, vtkPointData* inPD,
    vtkPointData* outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData* outCD);
  void ClipHexahedronInOut1D(vtkPoints* newPoints, vtkGenericCell* cell,
    vtkIncrementalPointLocator* locator, vtkCellArray** lines, vtkPointData* inPD,
    vtkPointData** outPD, vtkCellData* inCD, vtkIdType cellId, vtkCellData** outCD);

  void ClipBox0D(vtkGenericCell* cell, vtkIncrementalPointLocator* locator, vtkCellArray* verts,
    vtkPointData* inPD, vtkPointData* outPD, vtkCellData* inCD, vtkIdType cellId,
    vtkCellData* outCD);
  void ClipBoxInOut0D(vtkGenericCell* cell, vtkIncrementalPointLocator* locator,
    vtkCellArray** verts, vtkPointData* inPD, vtkPointData** outPD, vtkCellData* inCD,
    vtkIdType cellId, vtkCellData** outCD);
  void ClipHexahedron0D(vtkGenericCell* cell, vtkIncrementalPointLocator* locator,
    vtkCellArray* verts, vtkPointData* inPD, vtkPointData* outPD, vtkCellData* inCD,
    vtkIdType cellId, vtkCellData* outCD);
  void ClipHexahedronInOut0D(vtkGenericCell* cell, vtkIncrementalPointLocator* locator,
    vtkCellArray** verts, vtkPointData* inPD, vtkPointData** outPD, vtkCellData* inCD,
    vtkIdType cellId, vtkCellData** outCD);

protected:
  vtkBoxClipDataSet();
  ~vtkBoxClipDataSet() override;

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

  vtkIncrementalPointLocator* Locator;
  vtkTypeBool GenerateClipScalars;

  vtkTypeBool GenerateClippedOutput;

  // double MergeTolerance;

  double BoundBoxClip[3][2];
  unsigned int Orientation;
  double PlaneNormal[6][3]; // normal of each plane
  double PlanePoint[6][3];  // point on the plane

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

#endif
