1 // SMESH SMDS : implementaion of Salome mesh data structure
3 // Copyright (C) 2003 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.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
24 // File : SMDS_VolumeTool.hxx
26 // Created : Tue Jul 13 11:27:17 2004
27 // Author : Edward AGAPOV (eap)
30 #ifndef SMDS_VolumeTool_HeaderFile
31 #define SMDS_VolumeTool_HeaderFile
33 class SMDS_MeshElement;
35 class SMDS_PolyhedralVolumeOfNodes;
40 // =========================================================================
42 // Class providing topological and other information about SMDS_MeshVolume:
43 // allows iteration on faces or, to be precise, on nodes of volume sides;
44 // provides info on nodes connection etc.
46 // =========================================================================
54 SMDS_VolumeTool (const SMDS_MeshElement* theVolume);
56 bool Set (const SMDS_MeshElement* theVolume);
58 // Return false if theVolume is not of type SMDSAbs_Volume
60 // -----------------------
62 // -----------------------
64 bool IsForward() const { return myVolForward; }
65 // Check volume orientation. can be changed by Inverse().
66 // See node order of forward volumes at the file bottom
69 // Change nodes order as if the volume changes its orientation:
70 // top and bottom faces are reversed.
71 // Result of IsForward() and methods returning nodes change
73 const SMDS_MeshNode** GetNodes() { return myVolumeNodes; }
74 // Return array of volume nodes
76 int NbNodes() { return myVolumeNbNodes; }
77 // Return array of volume nodes
79 double GetSize() const;
80 // Return element volume
82 bool GetBaryCenter (double & X, double & Y, double & Z) const;
85 // -----------------------
86 // info on node connection
87 // -----------------------
89 bool IsLinked (const SMDS_MeshNode* theNode1,
90 const SMDS_MeshNode* theNode2) const;
91 // Return true if theNode1 is linked with theNode2.
93 bool IsLinked (const int theNode1Index,
94 const int theNode2Index) const;
95 // Return true if the node with theNode1Index is linked
96 // with the node with theNode2Index
98 int GetNodeIndex(const SMDS_MeshNode* theNode) const;
99 // Return an index of theNode
105 void SetExternalNormal ();
106 // Node order in faces will be so that faces normals are external.
108 int NbFaces() const { return myNbFaces; }
109 // Return number of faces of the volume. In the following
110 // methods 0 <= faceIndex < NbFaces()
112 int NbFaceNodes( int faceIndex );
113 // Return number of nodes in the array of face nodes
115 const int* GetFaceNodesIndices( int faceIndex );
116 // Return the array of face nodes indices
117 // To comfort link iteration, the array
118 // length == NbFaceNodes( faceIndex ) + 1 and
119 // the last node index == the first one.
121 const SMDS_MeshNode** GetFaceNodes( int faceIndex );
122 // Return the array of face nodes.
123 // To comfort link iteration, the array
124 // length == NbFaceNodes( faceIndex ) + 1 and
125 // the last node == the first one.
126 // WARNING: do not modify the array, some methods
127 // work basing on its contents
129 bool GetFaceNodes (int faceIndex,
130 std::set<const SMDS_MeshNode*>& theFaceNodes );
131 // Return a set of face nodes.
133 bool IsFaceExternal( int faceIndex );
134 // Check normal orientation of a face.
135 // SetExternalNormal() is taken into account.
137 bool IsFreeFace( int faceIndex );
138 // Check that all volumes built on the face nodes lays on one side
140 bool GetFaceNormal (int faceIndex, double & X, double & Y, double & Z);
141 // Return a normal to a face
143 double GetFaceArea( int faceIndex );
146 int GetOppFaceIndex( int faceIndex ) const;
147 // Return index of the opposite face if it exists, else -1.
149 int GetFaceIndex( const std::set<const SMDS_MeshNode*>& theFaceNodes );
150 // Return index of a face formed by theFaceNodes.
151 // Return -1 if a face not found
153 //int GetFaceIndex( const std::set<int>& theFaceNodesIndices );
154 // Return index of a face formed by theFaceNodesIndices
155 // Return -1 if a face not found
157 // ------------------------
158 // static methods for faces
159 // ------------------------
161 enum VolumeType { UNKNOWN, TETRA, PYRAM, PENTA, HEXA };
163 static VolumeType GetType(int nbNodes);
164 // return VolumeType by nb of nodes in a volume
166 static int NbFaces( VolumeType type );
167 // return nb of faces by volume type
169 static const int* GetFaceNodesIndices(VolumeType type,
172 // Return the array of face nodes indices
173 // To comfort link iteration, the array
174 // length == NbFaceNodes( faceIndex ) + 1 and
175 // the last node index == the first one.
177 static int NbFaceNodes(VolumeType type,
179 // Return number of nodes in the array of face nodes
183 bool setFace( int faceIndex );
185 const SMDS_MeshElement* myVolume;
186 const SMDS_PolyhedralVolumeOfNodes* myPolyedre;
191 const SMDS_MeshNode** myVolumeNodes;
193 bool myExternalFaces;
197 int* myFaceNodeIndices;
198 const SMDS_MeshNode** myFaceNodes;
204 ///////////////////////////////////////////////////////////////////////////
206 // ORDER OF NODES OF FORWARD ELEMENT
208 ///////////////////////////////////////////////////////////////////////////
215 // N0 +---|---+ N1 TETRAHEDRON
231 // | / \ | PENTAHEDRON
241 // N4+----------+N7 |
242 // | | | | HEXAHEDRON
245 // | N1+------|---+N2