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;
39 // =========================================================================
41 // Class providing topological and other information about SMDS_MeshVolume:
42 // allows iteration on faces or, to be precise, on nodes of volume sides;
43 // provides info on nodes connection etc.
45 // =========================================================================
53 SMDS_VolumeTool (const SMDS_MeshElement* theVolume);
55 bool Set (const SMDS_MeshElement* theVolume);
57 // Return false if theVolume is not of type SMDSAbs_Volume
59 // -----------------------
61 // -----------------------
63 bool IsForward() const { return myVolForward; }
64 // Check volume orientation. can be changed by Inverse().
65 // See node order of forward volumes at the file bottom
68 // Change nodes order as if the volume changes its orientation:
69 // top and bottom faces are reversed.
70 // Result of IsForward() and methods returning nodes change
72 const SMDS_MeshNode** GetNodes() { return myVolumeNodes; }
73 // Return array of volume nodes
75 int NbNodes() { return myVolumeNbNodes; }
76 // Return array of volume nodes
78 double GetSize() const;
79 // Return element volume
81 bool GetBaryCenter (double & X, double & Y, double & Z) const;
84 // -----------------------
85 // info on node connection
86 // -----------------------
88 bool IsLinked (const SMDS_MeshNode* theNode1,
89 const SMDS_MeshNode* theNode2) const;
90 // Return true if theNode1 is linked with theNode2.
92 bool IsLinked (const int theNode1Index,
93 const int theNode2Index) const;
94 // Return true if the node with theNode1Index is linked
95 // with the node with theNode2Index
97 int GetNodeIndex(const SMDS_MeshNode* theNode) const;
98 // Return an index of theNode
104 void SetExternalNormal ();
105 // Node order in faces will be so that faces normals are external.
107 int NbFaces() const { return myNbFaces; }
108 // Return number of faces of the volume. In the following
109 // methods 0 <= faceIndex < NbFaces()
111 int NbFaceNodes( int faceIndex );
112 // Return number of nodes in the array of face nodes
114 const int* GetFaceNodesIndices( int faceIndex );
115 // Return the array of face nodes indices
116 // To comfort link iteration, the array
117 // length == NbFaceNodes( faceIndex ) + 1 and
118 // the last node index == the first one.
120 const SMDS_MeshNode** GetFaceNodes( int faceIndex );
121 // Return the array of face nodes.
122 // To comfort link iteration, the array
123 // length == NbFaceNodes( faceIndex ) + 1 and
124 // the last node == the first one.
125 // WARNING: do not modify the array, some methods
126 // work basing on its contents
128 bool GetFaceNodes (int faceIndex,
129 std::set<const SMDS_MeshNode*>& theFaceNodes );
130 // Return a set of face nodes.
132 bool IsFaceExternal( int faceIndex );
133 // Check normal orientation of a face.
134 // SetExternalNormal() is taken into account.
136 bool IsFreeFace( int faceIndex );
137 // Check that all volumes built on the face nodes lays on one side
139 bool GetFaceNormal (int faceIndex, double & X, double & Y, double & Z);
140 // Return a normal to a face
142 double GetFaceArea( int faceIndex );
145 int GetOppFaceIndex( int faceIndex ) const;
146 // Return index of the opposite face if it exists, else -1.
148 int GetFaceIndex( const std::set<const SMDS_MeshNode*>& theFaceNodes );
149 // Return index of a face formed by theFaceNodes.
150 // Return -1 if a face not found
152 int GetFaceIndex( const std::set<int>& theFaceNodesIndices );
153 // Return index of a face formed by theFaceNodesIndices
154 // Return -1 if a face not found
159 bool setFace( int faceIndex );
161 const SMDS_MeshElement* myVolume;
165 const SMDS_MeshNode* myVolumeNodes[ 8 ];
167 bool myExternalFaces;
168 int* myFaceNodeIndices;
170 const SMDS_MeshNode* myFaceNodes[ 5 ];
177 ///////////////////////////////////////////////////////////////////////////
179 // ORDER OF NODES OF FORWARD ELEMENT
181 ///////////////////////////////////////////////////////////////////////////
188 // N0 +---|---+ N1 TETRAHEDRON
204 // | / \ | PENTAHEDRON
214 // N4+----------+N7 |
215 // | | | | HEXAHEDRON
218 // | N1+------|---+N2