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 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 SetForwardOrientation ();
105 // Node order in faces will be as for forward orientation
107 void SetExternalNormal ();
108 // Node order in faces will be so that faces normals are external.
109 // It overrides SetForwardOrientation()
111 int NbFaces() const { return myNbFaces; }
112 // Return number of faces of the volume. In the following
113 // methods 0 <= faceIndex < NbFaces()
115 int NbFaceNodes( int faceIndex );
116 // Return number of nodes in the array of face nodes
118 const int* GetFaceNodesIndices( int faceIndex );
119 // Return the array of face nodes indices
120 // To comfort link iteration, the array
121 // length == NbFaceNodes( faceIndex ) + 1 and
122 // the last node index == the first one.
124 const SMDS_MeshNode** GetFaceNodes( int faceIndex );
125 // Return the array of face nodes.
126 // To comfort link iteration, the array
127 // length == NbFaceNodes( faceIndex ) + 1 and
128 // the last node == the first one.
129 // WARNING: do not modify the array, some methods
130 // work basing on its contents
132 bool GetFaceNodes (int faceIndex,
133 std::set<const SMDS_MeshNode*>& theFaceNodes );
134 // Return a set of face nodes.
136 bool IsFaceExternal( int faceIndex );
137 // Check normal orientation of a face.
138 // SetForwardOrientation() and SetForwardOrientation() are taken
141 bool IsFreeFace( int faceIndex );
142 // Check that all volumes built on the face nodes lays on one side
144 bool GetFaceNormal (int faceIndex, double & X, double & Y, double & Z);
145 // Return a normal to a face
147 double GetFaceArea( int faceIndex );
150 int GetOppFaceIndex( int faceIndex ) const;
151 // Return index of the opposite face if it exists, else -1.
153 int GetFaceIndex( const std::set<const SMDS_MeshNode*>& theFaceNodes );
154 // Return index of a face formed by theFaceNodes.
155 // Return -1 if a face not found
157 int GetFaceIndex( const std::set<int>& theFaceNodesIndices );
158 // Return index of a face formed by theFaceNodesIndices
159 // Return -1 if a face not found
164 bool setFace( int faceIndex );
166 const SMDS_MeshElement* myVolume;
170 const SMDS_MeshNode* myVolumeNodes[ 8 ];
173 bool myExternalFaces;
174 int* myFaceNodeIndices;
176 const SMDS_MeshNode* myFaceNodes[ 5 ];
183 ///////////////////////////////////////////////////////////////////////////
185 // ORDER OF NODES OF FORWARD ELEMENT
187 ///////////////////////////////////////////////////////////////////////////
194 // N0 +---|---+ N2 TETRAHEDRON
210 // | / \ | PENTAHEDRON
220 // N4+----------+N5 |
221 // | | | | HEXAHEDRON
224 // | N3+------|---+N2