tetrahedron.hpp

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// Copyright (c) 2010, Lawrence Livermore National Security, LLC. Produced at
// the Lawrence Livermore National Laboratory. LLNL-CODE-443211. All Rights
// reserved. See file COPYRIGHT for details.
//
// This file is part of the MFEM library. For more information and source code
// availability see http://mfem.org.
//
// MFEM is free software; you can redistribute it and/or modify it under the
// terms of the GNU Lesser General Public License (as published by the Free
// Software Foundation) version 2.1 dated February 1999.

#ifndef MFEM_TETRAHEDRON
#define MFEM_TETRAHEDRON

#include "../config/config.hpp"
#include "element.hpp"

namespace mfem
{

class Tetrahedron : public Element
{
protected:
   int indices[4];
   static const int edges[6][2];

   int refinement_flag;

public:

   enum { TYPE_PU=0, TYPE_A=1, TYPE_PF=2, TYPE_O=3, TYPE_M=4 };

   Tetrahedron() : Element(Geometry::TETRAHEDRON) { refinement_flag = 0; }

   Tetrahedron(const int *ind, int attr = 1);

   Tetrahedron(int ind1, int ind2, int ind3, int ind4, int attr = 1);

   void  ParseRefinementFlag(int refinement_edges[2], int &type, int &flag);
   void CreateRefinementFlag(int refinement_edges[2], int  type, int  flag = 0);

   virtual int GetRefinementFlag() { return refinement_flag; }

   void SetRefinementFlag(int rf) { refinement_flag = rf; }

   virtual int NeedRefinement(DSTable &v_to_v, int *middle) const;

   virtual void SetVertices(const int *ind);

   virtual void MarkEdge(DenseMatrix &pmat) { }

   virtual void MarkEdge(const DSTable &v_to_v, const int *length);

   virtual int GetType() const { return Element::TETRAHEDRON; }

   virtual void GetVertices(Array<int> &v) const;

   virtual int *GetVertices() { return indices; }

   virtual int GetNVertices() const { return 4; }

   virtual int GetNEdges() const { return (6); }

   virtual const int *GetEdgeVertices(int ei) const { return (edges[ei]); }

   virtual int GetNFaces(int &nFaceVertices) const
   { nFaceVertices = 3; return 4; }

   virtual const int *GetFaceVertices(int fi) const
   { MFEM_ABORT("not implemented"); return NULL; }

   virtual Element *Duplicate(Mesh *m) const;

   virtual ~Tetrahedron() { }
};

extern Linear3DFiniteElement TetrahedronFE;

}

#endif