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 #include "SMESH_SMDS.hxx"
35 class SMDS_MeshElement;
37 class SMDS_PolyhedralVolumeOfNodes;
42 // =========================================================================
44 // Class providing topological and other information about SMDS_MeshVolume:
45 // allows iteration on faces or, to be precise, on nodes of volume sides;
46 // provides info on nodes connection etc.
48 // =========================================================================
50 class SMDS_EXPORT SMDS_VolumeTool
54 enum VolumeType { UNKNOWN = -1, TETRA = 0, PYRAM, PENTA, HEXA, POLYHEDA };
58 SMDS_VolumeTool (const SMDS_MeshElement* theVolume);
60 bool Set (const SMDS_MeshElement* theVolume);
62 // Return false if theVolume is not of type SMDSAbs_Volume
64 // -----------------------
66 // -----------------------
68 VolumeType GetVolumeType() const;
70 bool IsForward() const { return myVolForward; }
71 // Check volume orientation. can be changed by Inverse().
72 // See node order of forward volumes at the file bottom
75 // Change nodes order as if the volume changes its orientation:
76 // top and bottom faces are reversed.
77 // Result of IsForward() and methods returning nodes change
79 const SMDS_MeshNode** GetNodes() { return myVolumeNodes; }
80 // Return array of volume nodes
82 int NbNodes() { return myVolumeNbNodes; }
83 // Return array of volume nodes
85 double GetSize() const;
86 // Return element volume
88 bool GetBaryCenter (double & X, double & Y, double & Z) const;
91 // -----------------------
92 // info on node connection
93 // -----------------------
95 bool IsLinked (const SMDS_MeshNode* theNode1,
96 const SMDS_MeshNode* theNode2) const;
97 // Return true if theNode1 is linked with theNode2.
99 bool IsLinked (const int theNode1Index,
100 const int theNode2Index) const;
101 // Return true if the node with theNode1Index is linked
102 // with the node with theNode2Index
104 int GetNodeIndex(const SMDS_MeshNode* theNode) const;
105 // Return an index of theNode
111 void SetExternalNormal ();
112 // Node order in faces will be so that faces normals are external.
114 int NbFaces() const { return myNbFaces; }
115 // Return number of faces of the volume. In the following
116 // methods 0 <= faceIndex < NbFaces()
118 int NbFaceNodes( int faceIndex );
119 // Return number of nodes in the array of face nodes
121 const int* GetFaceNodesIndices( int faceIndex );
122 // Return the array of face nodes indices
123 // To comfort link iteration, the array
124 // length == NbFaceNodes( faceIndex ) + 1 and
125 // the last node index == the first one.
127 const SMDS_MeshNode** GetFaceNodes( int faceIndex );
128 // Return the array of face nodes.
129 // To comfort link iteration, the array
130 // length == NbFaceNodes( faceIndex ) + 1 and
131 // the last node == the first one.
132 // WARNING: do not modify the array, some methods
133 // work basing on its contents
135 bool GetFaceNodes (int faceIndex,
136 std::set<const SMDS_MeshNode*>& theFaceNodes );
137 // Return a set of face nodes.
139 bool IsFaceExternal( int faceIndex );
140 // Check normal orientation of a face.
141 // SetExternalNormal() is taken into account.
143 bool IsFreeFace( int faceIndex );
144 // Check that all volumes built on the face nodes lays on one side
146 bool GetFaceNormal (int faceIndex, double & X, double & Y, double & Z);
147 // Return a normal to a face
149 double GetFaceArea( int faceIndex );
152 int GetOppFaceIndex( int faceIndex ) const;
153 // Return index of the opposite face if it exists, else -1.
155 int GetFaceIndex( const std::set<const SMDS_MeshNode*>& theFaceNodes );
156 // Return index of a face formed by theFaceNodes.
157 // Return -1 if a face not found
159 //int GetFaceIndex( const std::set<int>& theFaceNodesIndices );
160 // Return index of a face formed by theFaceNodesIndices
161 // Return -1 if a face not found
163 // ------------------------
164 // static methods for faces
165 // ------------------------
167 static VolumeType GetType(int nbNodes);
168 // return VolumeType by nb of nodes in a volume
170 static int NbFaces( VolumeType type );
171 // return nb of faces by volume type
173 static const int* GetFaceNodesIndices(VolumeType type,
176 // Return the array of face nodes indices
177 // To comfort link iteration, the array
178 // length == NbFaceNodes( faceIndex ) + 1 and
179 // the last node index == the first one.
181 static int NbFaceNodes(VolumeType type,
183 // Return number of nodes in the array of face nodes
187 bool setFace( int faceIndex );
189 const SMDS_MeshElement* myVolume;
190 const SMDS_PolyhedralVolumeOfNodes* myPolyedre;
195 const SMDS_MeshNode** myVolumeNodes;
197 bool myExternalFaces;
201 int* myFaceNodeIndices;
202 const SMDS_MeshNode** myFaceNodes;
208 ///////////////////////////////////////////////////////////////////////////
210 // ORDER OF NODES OF FORWARD ELEMENT
212 ///////////////////////////////////////////////////////////////////////////
219 // N0 +---|---+ N1 TETRAHEDRON
235 // | / \ | PENTAHEDRON
245 // N4+----------+N7 |
246 // | | | | HEXAHEDRON
249 // | N1+------|---+N2