vtkTetra.h

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

  Program:   Visualization Toolkit
  Module:    vtkTetra.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 vtkTetra_h
#define vtkTetra_h

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

class vtkLine;
class vtkTriangle;
class vtkUnstructuredGrid;
class vtkIncrementalPointLocator;

class VTKCOMMONDATAMODEL_EXPORT vtkTetra : public vtkCell3D
{
public:
  static vtkTetra *New();
  vtkTypeMacro(vtkTetra,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_TETRA;}
  int GetNumberOfEdges() override {return 6;}
  int GetNumberOfFaces() override {return 4;}
  vtkCell *GetEdge(int edgeId) override;
  vtkCell *GetFace(int faceId) 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;
  void Clip(double value, vtkDataArray *cellScalars,
            vtkIncrementalPointLocator *locator, vtkCellArray *connectivity,
            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;
  double *GetParametricCoords() override;

  static int* GetTriangleCases(int caseId);

  int CellBoundary(int subId, const double pcoords[3], vtkIdList *pts) override;

  int GetParametricCenter(double pcoords[3]) override;

  double GetParametricDistance(const double pcoords[3]) override;

  static void TetraCenter(double p1[3], double p2[3], double p3[3], double p4[3],
                          double center[3]);

  static double Circumsphere(double  p1[3], double p2[3], double p3[3],
                             double p4[3], double center[3]);

  static double Insphere(double  p1[3], double p2[3], double p3[3],
                         double p4[3], double center[3]);

  static int BarycentricCoords(double x[3], double  x1[3], double x2[3],
                               double x3[3], double x4[3], double bcoords[4]);

  static double ComputeVolume(double  p1[3], double p2[3], double p3[3],
                              double p4[3]);

  int JacobianInverse(double **inverse, double derivs[12]);

  static void InterpolationFunctions(const double pcoords[3], double weights[4]);
  static void InterpolationDerivs(const double pcoords[3], double derivs[12]);

  void InterpolateFunctions(const double pcoords[3], double weights[4]) override
  {
    vtkTetra::InterpolationFunctions(pcoords,weights);
  }
  void InterpolateDerivs(const double pcoords[3], double derivs[12]) override
  {
    vtkTetra::InterpolationDerivs(pcoords,derivs);
  }


  static int *GetEdgeArray(int edgeId) VTK_SIZEHINT(2);
  static int *GetFaceArray(int faceId) VTK_SIZEHINT(3);

protected:
  vtkTetra();
  ~vtkTetra() override;

  vtkLine *Line;
  vtkTriangle *Triangle;

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

inline int vtkTetra::GetParametricCenter(double pcoords[3])
{
  pcoords[0] = pcoords[1] = pcoords[2] = 0.25;
  return 0;
}

#endif