edge_edge4.h

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00001 // The libMesh Finite Element Library.
00002 // Copyright (C) 2002-2012 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
00003 
00004 // This library is free software; you can redistribute it and/or
00005 // modify it under the terms of the GNU Lesser General Public
00006 // License as published by the Free Software Foundation; either
00007 // version 2.1 of the License, or (at your option) any later version.
00008 
00009 // This library is distributed in the hope that it will be useful,
00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012 // Lesser General Public License for more details.
00013 
00014 // You should have received a copy of the GNU Lesser General Public
00015 // License along with this library; if not, write to the Free Software
00016 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00017 
00018 
00019 
00020 #ifndef LIBMESH_EDGE_EDGE4_H
00021 #define LIBMESH_EDGE_EDGE4_H
00022 
00023 // Local includes
00024 #include "libmesh/libmesh_common.h"
00025 #include "libmesh/edge.h"
00026 
00027 // C++ includes
00028 #include <cstddef>
00029 
00030 namespace libMesh
00031 {
00032 
00043 // ------------------------------------------------------------
00044 // Edge4 class definition
00045 class Edge4 : public Edge
00046 {
00047   public:
00048 
00052   explicit
00053   Edge4 (Elem* p=NULL) :
00054     Edge(Edge4::n_nodes(), p, _nodelinks_data) {}
00055 
00059   unsigned int n_nodes() const { return 4; }
00060 
00064   unsigned int n_sub_elem() const { return 2; }
00065 
00069   virtual bool is_vertex(const unsigned int i) const;
00070 
00074   virtual bool is_edge(const unsigned int i) const;
00075 
00079   virtual bool is_face(const unsigned int i) const;
00080 
00081   /*
00082    * @returns true iff the specified (local) node number is on the
00083    * specified side
00084    */
00085   virtual bool is_node_on_side(const unsigned int n,
00086                                const unsigned int s) const;
00087 
00088   /*
00089    * @returns true iff the specified (local) node number is on the
00090    * specified edge (i.e. "returns true" in 1D)
00091    */
00092   virtual bool is_node_on_edge(const unsigned int n,
00093                                const unsigned int e) const;
00094 
00095   /*
00096    * @returns true iff the element map is definitely affine within
00097    * numerical tolerances
00098    */
00099   virtual bool has_affine_map () const;
00100 
00104   ElemType type()  const { return EDGE4; }
00105 
00109   Order default_order() const { return THIRD; }
00110 
00111   virtual void connectivity(const unsigned int sc,
00112                             const IOPackage iop,
00113                             std::vector<dof_id_type>& conn) const;
00114 
00117   unsigned int n_second_order_adjacent_vertices (const unsigned int) const
00118       { libmesh_error(); return 0;  }
00119 
00122   unsigned short int second_order_adjacent_vertex (const unsigned int,
00123                                                    const unsigned int) const
00124       { libmesh_error(); return 0; }
00125 
00126 
00127 #ifdef LIBMESH_ENABLE_INFINITE_ELEMENTS
00128 
00132   bool infinite () const { return false; }
00133 
00134 #endif
00135 
00136 
00137 protected:
00138 
00142   Node* _nodelinks_data[4];
00143 
00144 
00145 
00146 #ifdef LIBMESH_ENABLE_AMR
00147 
00151   float embedding_matrix (const unsigned int i,
00152                          const unsigned int j,
00153                          const unsigned int k) const
00154   { return _embedding_matrix[i][j][k]; }
00155 
00160   static const float _embedding_matrix[2][4][4];
00161 
00162 
00163 #endif
00164 };
00165 
00166 } // namespace libMesh
00167 
00168 
00169 #endif // LIBMESH_EDGE_EDGE4_H
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Last modified: February 05 2013 19:54:46 UTC

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