vtkHexahedron.h

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

  Program:   Visualization Toolkit
  Module:    vtkHexahedron.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 vtkHexahedron_h
#define vtkHexahedron_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkCell3D.h"

class vtkLine;
class vtkQuad;
class vtkIncrementalPointLocator;

class VTKCOMMONDATAMODEL_EXPORT vtkHexahedron : public vtkCell3D
{
public:
  static vtkHexahedron *New();
  vtkTypeMacro(vtkHexahedron,vtkCell3D);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  void GetEdgePoints(int edgeId, int* &pts) override;
  void GetFacePoints(int faceId, int* &pts) override;


  int GetCellType() override {return VTK_HEXAHEDRON;}
  int GetNumberOfEdges() override {return 12;}
  int GetNumberOfFaces() override {return 6;}
  vtkCell *GetEdge(int edgeId) override;
  vtkCell *GetFace(int faceId) override;
  int CellBoundary(int subId, const double pcoords[3], vtkIdList *pts) override;
  void Contour(double value, vtkDataArray *cellScalars,
               vtkIncrementalPointLocator *locator, vtkCellArray *verts,
               vtkCellArray *lines, vtkCellArray *polys,
               vtkPointData *inPd, vtkPointData *outPd,
               vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd) 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;
  double *GetParametricCoords() override;

  static int* GetTriangleCases(int caseId);

  static void InterpolationFunctions(const double pcoords[3], double weights[8]);
  static void InterpolationDerivs(const double pcoords[3], double derivs[24]);

  void InterpolateFunctions(const double pcoords[3], double weights[8]) override
  {
    vtkHexahedron::InterpolationFunctions(pcoords,weights);
  }
  void InterpolateDerivs(const double pcoords[3], double derivs[24]) override
  {
    vtkHexahedron::InterpolationDerivs(pcoords,derivs);
  }


  static int *GetEdgeArray(int edgeId) VTK_SIZEHINT(2);
  static int *GetFaceArray(int faceId) VTK_SIZEHINT(4);

  void JacobianInverse(const double pcoords[3], double **inverse, double derivs[24]);

protected:
  vtkHexahedron();
  ~vtkHexahedron() override;

  vtkLine *Line;
  vtkQuad *Quad;

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

#endif