1 // Copyright (C) 2007-2008 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
22 // SMESH SMDS : implementaion of Salome mesh data structure
23 // File : SMDS_MeshElement.hxx
26 #ifndef _SMDS_MeshElement_HeaderFile
27 #define _SMDS_MeshElement_HeaderFile
29 #include "SMESH_SMDS.hxx"
31 #include "SMDSAbs_ElementType.hxx"
32 #include "SMDS_MeshObject.hxx"
33 #include "SMDS_ElemIterator.hxx"
34 #include "SMDS_MeshElementIDFactory.hxx"
43 // ============================================================
45 * \brief Base class for elements
47 // ============================================================
49 class SMDS_EXPORT SMDS_MeshElement:public SMDS_MeshObject
53 SMDS_ElemIteratorPtr nodesIterator() const;
54 SMDS_ElemIteratorPtr edgesIterator() const;
55 SMDS_ElemIteratorPtr facesIterator() const;
56 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType type) const;
58 virtual int NbNodes() const;
59 virtual int NbEdges() const;
60 virtual int NbFaces() const;
63 ///Return the type of the current element
64 virtual SMDSAbs_ElementType GetType() const = 0;
65 virtual bool IsPoly() const { return false; };
66 virtual bool IsQuadratic() const;
67 //! Return type of entity
68 virtual SMDSAbs_EntityType GetEntityType() const = 0;
70 virtual bool IsMediumNode(const SMDS_MeshNode* node) const;
72 friend SMDS_EXPORT std::ostream & operator <<(std::ostream & OS, const SMDS_MeshElement *);
73 friend SMDS_EXPORT bool SMDS_MeshElementIDFactory::BindID(int ID,SMDS_MeshElement*elem);
75 // ===========================
76 // Access to nodes by index
77 // ===========================
79 * \brief Return node by its index
80 * \param ind - node index
81 * \retval const SMDS_MeshNode* - the node
83 virtual const SMDS_MeshNode* GetNode(const int ind) const;
86 * \brief Return node by its index
87 * \param ind - node index
88 * \retval const SMDS_MeshNode* - the node
90 * Index is wrapped if it is out of a valid range
92 const SMDS_MeshNode* GetNodeWrap(const int ind) const { return GetNode( WrappedIndex( ind )); }
95 * \brief Return true if index of node is valid (0 <= ind < NbNodes())
96 * \param ind - node index
97 * \retval bool - index check result
99 virtual bool IsValidIndex(const int ind) const;
102 * \brief Return a valid node index, fixing the given one if necessary
103 * \param ind - node index
104 * \retval int - valid node index
106 int WrappedIndex(const int ind) const {
107 if ( ind < 0 ) return NbNodes() + ind % NbNodes();
108 if ( ind >= NbNodes() ) return ind % NbNodes();
113 * \brief Check if a node belongs to the element
114 * \param node - the node to check
115 * \retval int - node index within the element, -1 if not found
117 int GetNodeIndex( const SMDS_MeshNode* node ) const;
120 SMDS_MeshElement(int ID=-1);
121 virtual void Print(std::ostream & OS) const;
127 // ============================================================
129 * \brief Comparator of elements by ID for usage in std containers
131 // ============================================================
134 bool operator () (const SMDS_MeshElement* e1, const SMDS_MeshElement* e2) const
135 { return e1->GetID() < e2->GetID(); }