1 // Copyright (C) 2007-2010 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 // SMESH SMDS : implementaion of Salome mesh data structure
24 // File : SMDS_MeshElement.hxx
27 #ifndef _SMDS_MeshElement_HeaderFile
28 #define _SMDS_MeshElement_HeaderFile
30 #include "SMESH_SMDS.hxx"
32 #include "SMDSAbs_ElementType.hxx"
33 #include "SMDS_MeshObject.hxx"
34 #include "SMDS_ElemIterator.hxx"
35 #include "SMDS_MeshElementIDFactory.hxx"
36 #include "SMDS_StdIterator.hxx"
45 // ============================================================
47 * \brief Base class for elements
49 // ============================================================
51 class SMDS_EXPORT SMDS_MeshElement:public SMDS_MeshObject
55 SMDS_ElemIteratorPtr nodesIterator() const;
56 SMDS_ElemIteratorPtr edgesIterator() const;
57 SMDS_ElemIteratorPtr facesIterator() const;
58 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType type) const;
60 // std-like iteration on nodes
61 typedef SMDS_StdIterator< const SMDS_MeshNode*, SMDS_ElemIteratorPtr > iterator;
62 iterator begin_nodes() const { return iterator( nodesIterator() ); }
63 iterator end_nodes() const { return iterator(); }
65 virtual int NbNodes() const;
66 virtual int NbEdges() const;
67 virtual int NbFaces() const;
70 ///Return the type of the current element
71 virtual SMDSAbs_ElementType GetType() const = 0;
72 virtual bool IsPoly() const { return false; }
73 virtual bool IsQuadratic() const;
74 //! Return type of entity
75 virtual SMDSAbs_EntityType GetEntityType() const = 0;
77 virtual bool IsMediumNode(const SMDS_MeshNode* node) const;
78 virtual int NbCornerNodes() const;
80 friend SMDS_EXPORT std::ostream & operator <<(std::ostream & OS, const SMDS_MeshElement *);
81 friend SMDS_EXPORT bool SMDS_MeshElementIDFactory::BindID(int ID,SMDS_MeshElement*elem);
83 // ===========================
84 // Access to nodes by index
85 // ===========================
87 * \brief Return node by its index
88 * \param ind - node index
89 * \retval const SMDS_MeshNode* - the node
91 virtual const SMDS_MeshNode* GetNode(const int ind) const;
94 * \brief Return node by its index
95 * \param ind - node index
96 * \retval const SMDS_MeshNode* - the node
98 * Index is wrapped if it is out of a valid range
100 const SMDS_MeshNode* GetNodeWrap(const int ind) const { return GetNode( WrappedIndex( ind )); }
103 * \brief Return true if index of node is valid (0 <= ind < NbNodes())
104 * \param ind - node index
105 * \retval bool - index check result
107 virtual bool IsValidIndex(const int ind) const;
110 * \brief Return a valid node index, fixing the given one if necessary
111 * \param ind - node index
112 * \retval int - valid node index
114 int WrappedIndex(const int ind) const {
115 if ( ind < 0 ) return NbNodes() + ind % NbNodes();
116 if ( ind >= NbNodes() ) return ind % NbNodes();
121 * \brief Check if a node belongs to the element
122 * \param node - the node to check
123 * \retval int - node index within the element, -1 if not found
125 int GetNodeIndex( const SMDS_MeshNode* node ) const;
128 SMDS_MeshElement(int ID=-1);
129 virtual void Print(std::ostream & OS) const;
135 // ============================================================
137 * \brief Comparator of elements by ID for usage in std containers
139 // ============================================================
142 bool operator () (const SMDS_MeshElement* e1, const SMDS_MeshElement* e2) const
143 { return e1->GetID() < e2->GetID(); }