face_quad4.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_FACE_QUAD4_H
00021 #define LIBMESH_FACE_QUAD4_H
00022 
00023 
00024 // Local includes
00025 #include "libmesh/libmesh_common.h"
00026 #include "libmesh/face_quad.h"
00027 
00028 // C++ includes
00029 #include <cstddef>
00030 
00031 namespace libMesh
00032 {
00033 
00034 
00035 
00036 // Forward declarations
00037 
00038 
00039 
00056 // ------------------------------------------------------------
00057 // Quad4 class definition
00058 class Quad4 : public Quad
00059 {
00060 public:
00061 
00065   explicit
00066   Quad4 (Elem* p=NULL) :
00067     Quad(Quad::n_nodes(), p, _nodelinks_data) {}
00068 
00072   ElemType type () const { return QUAD4; }
00073 
00077   unsigned int n_sub_elem() const { return 1; }
00078 
00082   virtual bool is_vertex(const unsigned int i) const;
00083 
00087   virtual bool is_edge(const unsigned int i) const;
00088 
00092   virtual bool is_face(const unsigned int i) const;
00093 
00094   /*
00095    * @returns true iff the specified (local) node number is on the
00096    * specified side
00097    */
00098   virtual bool is_node_on_side(const unsigned int n,
00099                                const unsigned int s) const;
00100 
00101   /*
00102    * @returns true iff the specified (local) node number is on the
00103    * specified edge (== is_node_on_side in 2D)
00104    */
00105   virtual bool is_node_on_edge(const unsigned int n,
00106                                const unsigned int e) const
00107   { return this->is_node_on_side(n,e); }
00108 
00109   /*
00110    * @returns true iff the element map is definitely affine within
00111    * numerical tolerances
00112    */
00113   virtual bool has_affine_map () const;
00114 
00118   Order default_order() const { return FIRST; }
00119 
00120   AutoPtr<Elem> build_side (const unsigned int i,
00121                             bool proxy) const;
00122 
00123   virtual void connectivity(const unsigned int sf,
00124                             const IOPackage iop,
00125                             std::vector<dof_id_type>& conn) const;
00126 
00131   static const unsigned int side_nodes_map[4][2];
00132 
00138   virtual Real volume () const;
00139 
00140 protected:
00141 
00145   Node* _nodelinks_data[4];
00146 
00147 
00148 
00149 #ifdef LIBMESH_ENABLE_AMR
00150 
00154   float embedding_matrix (const unsigned int i,
00155                           const unsigned int j,
00156                           const unsigned int k) const
00157   { return _embedding_matrix[i][j][k]; }
00158 
00163   static const float _embedding_matrix[4][4][4];
00164 
00165 #endif
00166 
00167 };
00168 
00169 
00170 } // namespace libMesh
00171 
00172 #endif // LIBMESH_FACE_QUAD4_H
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Last modified: February 05 2013 19:54:46 UTC

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