1 // Copyright (C) 2007-2020 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, or (at your option) any later version.
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 // File : DriverCGNS_Read.cxx
23 // Created : Thu Jun 30 10:33:31 2011
24 // Author : Edward AGAPOV (eap)
26 #include <utilities.h>
28 #include "DriverCGNS_Read.hxx"
30 #include "SMDS_MeshNode.hxx"
31 #include "SMESHDS_Group.hxx"
32 #include "SMESHDS_Mesh.hxx"
33 #include "SMESH_Comment.hxx"
34 #include "SMESH_TypeDefs.hxx"
43 #if CGNS_VERSION < 3100
47 #define NB_ZONE_SIZE_VAL 9
48 #define CGNS_NAME_SIZE 33
49 #define CGNS_STRUCT_RANGE_SZ 6
55 //================================================================================
57 * \brief Data of a zone
62 int _nodeIdShift; // nb nodes in previously read zones
63 int _elemIdShift; // nb faces in previously read zones
64 int _nbNodes, _nbElems;
66 int _sizeX, _sizeY, _sizeZ, _nbCells; // structured
67 cgsize_t _sizes[NB_ZONE_SIZE_VAL];
68 CGNS_ENUMT(ZoneType_t) _type;
69 map< int, int > _nodeReplacementMap;/* key: id of node to replace (in this zone),
70 value: id of node to replace by (in another zone)
71 id values include _nodeIdShift of the zones */
72 void SetSizeAndDim( cgsize_t* sizes, int meshDim )
75 memcpy( _sizes, sizes, NB_ZONE_SIZE_VAL*sizeof(cgsize_t));
77 _sizeY = _meshDim > 1 ? _sizes[1] : 0;
78 _sizeZ = _meshDim > 2 ? _sizes[2] : 0;
79 _nbCells = (_sizeX - 1) * ( _meshDim > 1 ? _sizeY : 1 ) * ( _meshDim > 2 ? _sizeZ : 1 );
81 bool IsStructured() const { return ( _type == CGNS_ENUMV( Structured )); }
82 int IndexSize() const { return IsStructured() ? _meshDim : 1; }
83 string ReadZonesConnection(int file, int base,
84 const map< string, TZoneData >& zonesByName,
86 void ReplaceNodes( cgsize_t* ids, int nbIds, int idShift = 0 ) const;
88 // Methods for a structured zone
90 int NodeID( int i, int j, int k = 1 ) const
92 return _nodeIdShift + (k-1)*_sizeX*_sizeY + (j-1)*_sizeX + i;
94 int NodeID( const gp_XYZ& ijk ) const
96 return NodeID( int(ijk.X()), int(ijk.Y()), int(ijk.Z()));
98 void CellNodes( int i, int j, int k, cgsize_t* ids ) const
100 ids[0] = NodeID( i , j , k );
101 ids[1] = NodeID( i , j+1, k );
102 ids[2] = NodeID( i+1, j+1, k );
103 ids[3] = NodeID( i+1, j , k );
104 ids[4] = NodeID( i , j , k+1);
105 ids[5] = NodeID( i , j+1, k+1);
106 ids[6] = NodeID( i+1, j+1, k+1);
107 ids[7] = NodeID( i+1, j , k+1);
109 void CellNodes( int i, int j, cgsize_t* ids ) const
111 ids[0] = NodeID( i , j );
112 ids[1] = NodeID( i , j+1 );
113 ids[2] = NodeID( i+1, j+1 );
114 ids[3] = NodeID( i+1, j );
116 void IFaceNodes( int i, int j, int k, cgsize_t* ids ) const // face perpendiculaire to X (3D)
118 ids[0] = NodeID( i, j, k );
119 ids[1] = ids[0] + _sizeX*( i==_sizeX ? 1 : _sizeY );
120 ids[2] = ids[0] + _sizeX*( _sizeY + 1 );
121 ids[3] = ids[0] + _sizeX*( i==_sizeX ? _sizeY : 1 );
123 void JFaceNodes( int i, int j, int k, cgsize_t* ids ) const
125 ids[0] = NodeID( i, j, k );
126 ids[1] = ids[0] + ( j==_sizeY ? _sizeX*_sizeY : 1);
127 ids[2] = ids[0] + _sizeX*_sizeY + 1;
128 ids[3] = ids[0] + ( j==_sizeY ? 1 : _sizeX*_sizeY);
130 void KFaceNodes( int i, int j, int k, cgsize_t* ids ) const
132 ids[0] = NodeID( i, j, k );
133 ids[1] = ids[0] + ( k==_sizeZ ? 1 : _sizeX);
134 ids[2] = ids[0] + _sizeX + 1;
135 ids[3] = ids[0] + ( k==_sizeZ ? _sizeX : 1);
137 void IEdgeNodes( int i, int j, int k, cgsize_t* ids ) const // edge perpendiculaire to X (2D)
139 ids[0] = NodeID( i, j, 0 );
140 ids[1] = ids[0] + _sizeX;
142 void JEdgeNodes( int i, int j, int k, cgsize_t* ids ) const
144 ids[0] = NodeID( i, j, 0 );
147 #define gpXYZ2IJK(METHOD) \
148 void METHOD( const gp_XYZ& ijk, cgsize_t* ids ) const { \
149 METHOD( int(ijk.X()), int(ijk.Y()), int(ijk.Z()), ids); \
151 gpXYZ2IJK( IFaceNodes )
152 gpXYZ2IJK( JFaceNodes )
153 gpXYZ2IJK( KFaceNodes )
154 gpXYZ2IJK( IEdgeNodes )
155 gpXYZ2IJK( JEdgeNodes )
158 //================================================================================
160 * \brief Iterator over nodes of the structired grid using FORTRAN multidimensional
163 class TPointRangeIterator
165 int _beg[3], _end[3], _cur[3], _dir[3], _dim;
168 TPointRangeIterator( const cgsize_t* range, int dim ):_dim(dim)
171 for ( int i = 0; i < dim; ++i )
174 _end[i] = range[i+dim];
175 _dir[i] = _end[i] < _beg[i] ? -1 : 1;
178 if ( _end[i] - _beg[i] )
181 // for ( int i = dim; i < 3; ++i )
182 // _cur[i] = _beg[i] = _end[i] = _dir[i] = 0;
190 gp_XYZ res( _cur[0], _cur[1], _cur[2] );
191 for ( int i = 0; i < _dim; ++i )
194 if ( _cur[i]*_dir[i] < _end[i]*_dir[i] )
206 for ( int i = 0; i < _dim; ++i )
207 size *= _dir[i]*(_end[i]-_beg[i]);
210 gp_XYZ Begin() const { return gp_XYZ( _beg[0], _beg[1], _beg[2] ); }
211 //gp_XYZ End() const { return gp_XYZ( _end[0]-1, _end[1]-1, _end[2]-1 ); }
214 //================================================================================
216 * \brief Checks if the two arrays of node IDs describe nodes with equal coordinates
218 //================================================================================
220 bool isEqualNodes( const int* nIds1, const int* nIds2, int nbNodes, SMESHDS_Mesh* mesh )
224 SMESH_TNodeXYZ nn1[2], nn2[2];
225 nn1[0] = mesh->FindNode( nIds1[0] );
226 nn2[0] = mesh->FindNode( nIds2[0] );
227 if ( !nn1[0]._node || !nn2[0]._node )
229 double dist1 = ( nn1[0] - nn2[0] ).Modulus();
230 double dist2 = 0, tol = 1e-7;
233 nn1[1] = mesh->FindNode( nIds1[1] );
234 nn2[1] = mesh->FindNode( nIds2[1] );
235 if ( !nn1[1]._node || !nn2[1]._node )
237 dist2 = ( nn1[1] - nn2[1] ).Modulus();
238 tol = 1e-5 * ( nn1[0] - nn1[1] ).Modulus();
240 return ( dist1 < tol && dist2 < tol );
245 //================================================================================
247 * \brief Reads zone interface connectivity
248 * \param file - file to read
249 * \param base - base to read
250 * \param zone - zone to replace nodes in
251 * \param zonesByName - TZoneData by name
252 * \retval string - warning message
254 * see // http://www.grc.nasa.gov/WWW/cgns/CGNS_docs_current/sids/cnct.html
256 //================================================================================
258 string TZoneData::ReadZonesConnection( int file,
260 const map< string, TZoneData >& zonesByName,
265 char connectName[ CGNS_NAME_SIZE ], donorName [ CGNS_NAME_SIZE ];
267 // ----------------------------
268 // read zone 1 to 1 interfaces
269 // ----------------------------
270 if ( IsStructured() )
273 if ( cg_n1to1 ( file, base, _id, &nb1to1) == CG_OK )
275 cgsize_t range[CGNS_STRUCT_RANGE_SZ], donorRange[CGNS_STRUCT_RANGE_SZ];
276 int transform[3] = {0,0,0};
278 for ( int I = 1; I <= nb1to1; ++I )
280 if ( cg_1to1_read(file, base, _id, I, connectName,
281 donorName, range, donorRange, transform) == CG_OK )
283 map< string, TZoneData>::const_iterator n_z = zonesByName.find( donorName );
284 if ( n_z == zonesByName.end() )
285 continue; // donor zone not yet read
286 const TZoneData& zone2 = n_z->second;
288 // set up matrix to transform ijk of the zone to ijk of the zone2
290 for ( int i = 0; i < _meshDim; ++i )
293 int row = Abs(transform[i]);
295 int val = transform[i] > 0 ? +1 : -1;
299 // fill nodeReplacementMap
300 TPointRangeIterator rangeIt1( range, _meshDim );
301 TPointRangeIterator rangeIt2( donorRange, _meshDim );
302 gp_XYZ begin1 = rangeIt1.Begin(), begin2 = rangeIt2.Begin(), index1, index2;
303 if ( &zone2 == this )
305 // not to read twice the same interface with self
306 TPointRangeIterator rangeIt1bis( range, _meshDim );
307 if ( rangeIt1bis.More() )
309 index1 = rangeIt1bis.Next();
310 index2 = T * ( index1 - begin1 ) + begin2;
311 int node1 = NodeID( index1 );
312 int node2 = zone2.NodeID( index2 );
313 if ( _nodeReplacementMap.count( node2 ) &&
314 _nodeReplacementMap[ node2 ] == node1 )
315 continue; // this interface already read
318 // check if range and donorRange describe the same nodes
320 int ids1[2], ids2[2], nbN = 0;
321 TPointRangeIterator rangeIt1bis( range, _meshDim );
322 index1 = rangeIt1bis.Next();
323 index2 = T * ( index1 - begin1 ) + begin2;
324 ids1[0] = NodeID( index1 );
325 ids2[0] = zone2.NodeID( index2 );
327 if ( rangeIt1bis.More() )
329 index1 = rangeIt1bis.Next();
330 index2 = T * ( index1 - begin1 ) + begin2;
331 ids1[1] = NodeID( index1 );
332 ids2[1] = zone2.NodeID( index2 );
335 if ( !isEqualNodes( &ids1[0], &ids2[0], nbN, mesh ))
338 while ( rangeIt1.More() )
340 index1 = rangeIt1.Next();
341 index2 = T * ( index1 - begin1 ) + begin2;
342 int node1 = NodeID( index1 );
343 int node2 = zone2.NodeID( index2 );
344 _nodeReplacementMap.insert( make_pair( node1, node2 ));
349 error = cg_get_error();
355 error = cg_get_error();
359 // ---------------------------------
360 // read general zone connectivities
361 // ---------------------------------
363 if ( cg_nconns( file, base, _id, &nbConn) == CG_OK )
365 cgsize_t nb, donorNb;
366 CGNS_ENUMT(GridLocation_t) location;
367 CGNS_ENUMT(GridConnectivityType_t) connectType;
368 CGNS_ENUMT(PointSetType_t) ptype, donorPtype;
369 CGNS_ENUMT(ZoneType_t) donorZonetype;
370 CGNS_ENUMT(DataType_t) donorDatatype;
372 for ( int I = 1; I <= nbConn; ++I )
374 if ( cg_conn_info(file, base, _id, I, connectName, &location, &connectType,
375 &ptype, &nb, donorName, &donorZonetype, &donorPtype,
376 &donorDatatype, &donorNb ) == CG_OK )
378 if ( location != CGNS_ENUMV( Vertex ))
379 continue; // we do not support cell-to-cell connectivity
380 if ( ptype != CGNS_ENUMV( PointList ) &&
381 ptype != CGNS_ENUMV( PointRange ))
383 if ( donorPtype != CGNS_ENUMV( PointList ) &&
384 donorPtype != CGNS_ENUMV( PointRange ))
387 map< string, TZoneData>::const_iterator n_z = zonesByName.find( donorName );
388 if ( n_z == zonesByName.end() )
389 continue; // donor zone not yet read
390 const TZoneData& zone2 = n_z->second;
392 vector< cgsize_t > ids( nb * IndexSize() );
393 vector< cgsize_t > donorIds( donorNb * zone2.IndexSize() );
394 if (cg_conn_read ( file, base, _id, I,
395 &ids[0], CGNS_ENUMV(Integer), &donorIds[0]) == CG_OK )
397 for ( int isThisZone = 0; isThisZone < 2; ++isThisZone )
399 const TZoneData& zone = isThisZone ? *this : zone2;
400 CGNS_ENUMT(PointSetType_t) type = isThisZone ? ptype : donorPtype;
401 vector< cgsize_t >& points = isThisZone ? ids : donorIds;
402 if ( type == CGNS_ENUMV( PointRange ))
404 TPointRangeIterator rangeIt( &points[0], zone._meshDim );
406 while ( rangeIt.More() )
407 points.push_back ( NodeID( rangeIt.Next() ));
409 else if ( zone.IsStructured() )
411 vector< cgsize_t > resIDs; resIDs.reserve( points.size() / IndexSize() );
412 for ( size_t i = 0; i < points.size(); i += IndexSize() )
413 resIDs.push_back( zone.NodeID( points[i+0], points[i+1], points[i+2] ));
414 resIDs.swap( points );
416 else if ( zone._nodeIdShift > 0 )
418 for ( size_t i = 0; i < points.size(); ++i )
419 points[i] += zone._nodeIdShift;
422 size_t nbN = std::min( ids.size(), donorIds.size());
423 if ( isEqualNodes( &ids[0], &donorIds[0], nbN, mesh ))
424 for ( size_t i = 0; i < nbN; ++i )
425 _nodeReplacementMap.insert( make_pair( ids[i], donorIds[i] ));
429 error = cg_get_error();
434 error = cg_get_error();
440 error = cg_get_error();
445 //================================================================================
447 * \brief Replaces node ids according to nodeReplacementMap to take into account
448 * connection of zones
450 //================================================================================
452 void TZoneData::ReplaceNodes( cgsize_t* ids, int nbIds, int idShift/* = 0*/ ) const
454 if ( !_nodeReplacementMap.empty() )
456 map< int, int >::const_iterator it, end = _nodeReplacementMap.end();
457 for ( int i = 0; i < nbIds; ++i )
458 if (( it = _nodeReplacementMap.find( ids[i] + idShift)) != end )
465 for ( int i = 0; i < nbIds; ++i )
469 //================================================================================
471 * \brief functions adding an element of a particular type
473 SMDS_MeshElement* add_0D(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
475 return mesh->Add0DElementWithID( ids[0], ID );
477 SMDS_MeshElement* add_BAR_2(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
479 return mesh->AddEdgeWithID( ids[0], ids[1], ID );
481 SMDS_MeshElement* add_BAR_3(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
483 return mesh->AddEdgeWithID( ids[0], ids[1], ids[2], ID );
485 SMDS_MeshElement* add_TRI_3(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
487 return mesh->AddFaceWithID( ids[0], ids[2], ids[1], ID );
489 SMDS_MeshElement* add_TRI_6(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
491 return mesh->AddFaceWithID( ids[0], ids[2], ids[1], ids[5], ids[4], ids[3], ID );
493 SMDS_MeshElement* add_QUAD_4(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
495 return mesh->AddFaceWithID( ids[0], ids[3], ids[2], ids[1], ID );
497 SMDS_MeshElement* add_QUAD_8(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
499 return mesh->AddFaceWithID( ids[0],ids[3],ids[2],ids[1],ids[7],ids[6],ids[5],ids[4], ID );
501 SMDS_MeshElement* add_QUAD_9(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
503 return mesh->AddFaceWithID( ids[0],ids[3],ids[2],ids[1],ids[7],ids[6],ids[5],ids[4],ids[8], ID);
505 SMDS_MeshElement* add_TETRA_4(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
507 return mesh->AddVolumeWithID( ids[0], ids[2], ids[1], ids[3], ID );
509 SMDS_MeshElement* add_TETRA_10(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
511 return mesh->AddVolumeWithID( ids[0],ids[2],ids[1],ids[3],ids[6],
512 ids[5],ids[4],ids[7],ids[9],ids[8], ID );
514 SMDS_MeshElement* add_PYRA_5(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
516 return mesh->AddVolumeWithID( ids[0],ids[3],ids[2],ids[1],ids[4],ID );
518 SMDS_MeshElement* add_PYRA_13(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
520 return mesh->AddVolumeWithID( ids[0],ids[3],ids[2],ids[1],ids[4],ids[8],ids[7],
521 ids[6],ids[5],ids[9],ids[12],ids[11],ids[10], ID );
523 SMDS_MeshElement* add_PENTA_6(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
525 return mesh->AddVolumeWithID( ids[0],ids[2],ids[1],ids[3],ids[5],ids[4], ID );
527 SMDS_MeshElement* add_PENTA_15(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
529 return mesh->AddVolumeWithID( ids[0],ids[2],ids[1],ids[3],ids[5],ids[4],ids[8],ids[7],
530 ids[6],ids[9],ids[11],ids[10],ids[14],ids[13],ids[12], ID );
532 SMDS_MeshElement* add_HEXA_8(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
534 return mesh->AddVolumeWithID( ids[0],ids[3],ids[2],ids[1],ids[4],ids[7],ids[6],ids[5], ID );
536 SMDS_MeshElement* add_HEXA_20(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
538 return mesh->AddVolumeWithID( ids[0],ids[3],ids[2],ids[1],ids[4],ids[7],ids[6],
539 ids[5],ids[11],ids[10],ids[9],ids[8],ids[12],ids[15],
540 ids[14],ids[13],ids[19],ids[18],ids[17],ids[16], ID );
542 SMDS_MeshElement* add_HEXA_27(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
544 return mesh->AddVolumeWithID( ids[0],ids[3],ids[2],ids[1],ids[4],ids[7],ids[6],
545 ids[5],ids[11],ids[10],ids[9],ids[8],ids[12],ids[15],
546 ids[14],ids[13],ids[19],ids[18],ids[17],ids[16],
547 ids[20],ids[24],ids[23],ids[22],ids[21],ids[25],ids[26], ID );
549 SMDS_MeshElement* add_NGON(cgsize_t* ids, SMESHDS_Mesh* mesh, int ID)
551 vector<int> idVec( ids[0] );
552 for ( int i = 0; i < ids[0]; ++i )
553 idVec[ i ] = (int) ids[ i + 1];
554 return mesh->AddPolygonalFaceWithID( idVec, ID );
557 typedef SMDS_MeshElement* (* PAddElemFun) (cgsize_t* ids, SMESHDS_Mesh* mesh, int ID);
559 //================================================================================
561 * \brief Return an array of functions each adding an element of a particular type
563 //================================================================================
565 PAddElemFun* getAddElemFunTable()
567 static vector< PAddElemFun > funVec;
568 if ( funVec.empty() )
570 funVec.resize( NofValidElementTypes, (PAddElemFun)0 );
571 funVec[ CGNS_ENUMV( NODE )] = add_0D ;
572 funVec[ CGNS_ENUMV( BAR_2 )] = add_BAR_2 ;
573 funVec[ CGNS_ENUMV( BAR_3 )] = add_BAR_3 ;
574 funVec[ CGNS_ENUMV( TRI_3 )] = add_TRI_3 ;
575 funVec[ CGNS_ENUMV( TRI_6 )] = add_TRI_6 ;
576 funVec[ CGNS_ENUMV( QUAD_4 )] = add_QUAD_4 ;
577 funVec[ CGNS_ENUMV( QUAD_8 )] = add_QUAD_8 ;
578 funVec[ CGNS_ENUMV( QUAD_9 )] = add_QUAD_9 ;
579 funVec[ CGNS_ENUMV( TETRA_4 )] = add_TETRA_4 ;
580 funVec[ CGNS_ENUMV( TETRA_10 )] = add_TETRA_10;
581 funVec[ CGNS_ENUMV( PYRA_5 )] = add_PYRA_5 ;
582 funVec[ CGNS_ENUMV( PYRA_13 )] = add_PYRA_13 ;
583 funVec[ CGNS_ENUMV( PYRA_14 )] = add_PYRA_13 ;
584 funVec[ CGNS_ENUMV( PENTA_6 )] = add_PENTA_6 ;
585 funVec[ CGNS_ENUMV( PENTA_15 )] = add_PENTA_15;
586 funVec[ CGNS_ENUMV( PENTA_18 )] = add_PENTA_15;
587 funVec[ CGNS_ENUMV( HEXA_8 )] = add_HEXA_8 ;
588 funVec[ CGNS_ENUMV( HEXA_20 )] = add_HEXA_20 ;
589 funVec[ CGNS_ENUMV( HEXA_27 )] = add_HEXA_27 ;
590 funVec[ CGNS_ENUMV( NGON_n )] = add_NGON ;
595 //================================================================================
597 * \brief Finds an existing boundary element
599 //================================================================================
601 const SMDS_MeshElement* findElement(const cgsize_t* nodeIDs,
603 const SMESHDS_Mesh* mesh)
605 const SMDS_MeshNode* nn[4]; // look for quad4 or seg2
606 if (( nn[0] = mesh->FindNode( nodeIDs[0] )))
608 SMDSAbs_ElementType eType = nbNodes==4 ? SMDSAbs_Face : SMDSAbs_Edge;
609 SMDS_ElemIteratorPtr eIt = nn[0]->GetInverseElementIterator( eType );
611 for ( int i = 1; i < nbNodes; ++i )
612 nn[i] = mesh->FindNode( nodeIDs[i] );
613 while ( eIt->more() )
615 const SMDS_MeshElement* e = eIt->next();
616 if ( e->NbNodes() == nbNodes )
619 for ( int i = 1; i < nbNodes && elemOK; ++i )
620 elemOK = ( e->GetNodeIndex( nn[i] ) >= 0 );
631 //================================================================================
633 * \brief Perform reading a myMeshId-th mesh
635 //================================================================================
637 Driver_Mesh::Status DriverCGNS_Read::Perform()
639 MESSAGE("DriverCGNS_Read::Perform");
640 myErrorMessages.clear();
643 if (( aResult = open() ) != DRS_OK )
646 // read nb of meshes (CGNSBase_t)
647 if ( myMeshId < 0 || myMeshId >= GetNbMeshes(aResult))
648 return addMessage( SMESH_Comment("Invalid mesh index :") << myMeshId );
649 MESSAGE("NbMeshes: " << GetNbMeshes(aResult));
651 // read a name and a dimension of the mesh
652 const int cgnsBase = myMeshId + 1;
653 char meshName[CGNS_NAME_SIZE];
654 int meshDim, spaceDim;
655 if ( cg_base_read( _fn, cgnsBase, meshName, &meshDim, &spaceDim) != CG_OK )
656 return addMessage( cg_get_error() );
658 if ( spaceDim < 1 || spaceDim > 3 )
659 return addMessage( SMESH_Comment("Invalid space dimension: ") << spaceDim
660 << " in mesh '" << meshName << "'");
662 myMeshName = meshName;
663 MESSAGE("myMeshName: " << myMeshName);
666 // read nb of domains (Zone_t) in the mesh
668 if ( cg_nzones (_fn, cgnsBase, &nbZones) != CG_OK )
669 return addMessage( cg_get_error() );
672 return addMessage( SMESH_Comment("Empty mesh: '") << meshName << "'");
673 MESSAGE("nbZones: " << nbZones);
675 // read the domains (zones)
676 // ------------------------
677 map< string, TZoneData > zonesByName;
678 char name[CGNS_NAME_SIZE];
679 cgsize_t sizes[NB_ZONE_SIZE_VAL];
680 memset(sizes, 0, NB_ZONE_SIZE_VAL * sizeof(cgsize_t));
682 const SMDS_MeshInfo& meshInfo = myMesh->GetMeshInfo();
683 int groupID = myMesh->GetGroups().size();
685 for ( int iZone = 1; iZone <= nbZones; ++iZone )
687 // size and name of a zone
688 if ( cg_zone_read( _fn, cgnsBase, iZone, name, sizes) != CG_OK) {
689 addMessage( cg_get_error() );
692 TZoneData& zone = zonesByName[ name ];
694 zone._nodeIdShift = meshInfo.NbNodes();
695 zone._elemIdShift = meshInfo.NbElements();
696 zone.SetSizeAndDim( sizes, meshDim );
697 MESSAGE(" zone name: " << name);
699 // mesh type of the zone
700 if ( cg_zone_type ( _fn, cgnsBase, iZone, &zone._type) != CG_OK) {
701 addMessage( cg_get_error() );
705 switch ( zone._type )
707 case CGNS_ENUMV( Unstructured ):
708 MESSAGE(" zone type: unstructured");
710 case CGNS_ENUMV( Structured ):
711 MESSAGE(" zone type: structured");
713 case CGNS_ENUMV( ZoneTypeNull ):
714 addMessage( "Meshes with ZoneTypeNull are not supported");
716 case CGNS_ENUMV( ZoneTypeUserDefined ):
717 addMessage( "Meshes with ZoneTypeUserDefined are not supported");
720 addMessage( "Unknown ZoneType_t");
727 MESSAGE(" Read nodes");
728 if ( cg_ncoords( _fn, cgnsBase, iZone, &spaceDim) != CG_OK ) {
729 addMessage( cg_get_error() );
732 if ( spaceDim < 1 ) {
733 addMessage( SMESH_Comment("No coordinates defined in zone ")
734 << iZone << " of Mesh " << myMeshId );
739 MESSAGE(" Read coordinates");
740 cgsize_t rmin[3] = {1,1,1}; // range of nodes to read
741 cgsize_t rmax[3] = {1,1,1};
742 int nbNodes = rmax[0] = zone._sizes[0];
743 if ( zone.IsStructured())
744 for ( int i = 1; i < meshDim; ++i )
745 nbNodes *= rmax[i] = zone._sizes[i];
747 vector<double> coords[3];
748 for ( int c = 1; c <= spaceDim; ++c)
750 coords[c-1].resize( nbNodes );
752 CGNS_ENUMV( DataType_t ) type;
753 if ( cg_coord_info( _fn, cgnsBase, iZone, c, &type, name) != CG_OK ||
754 cg_coord_read( _fn, cgnsBase, iZone, name, CGNS_ENUMV(RealDouble),
755 rmin, rmax, (void*)&(coords[c-1][0])) != CG_OK)
757 addMessage( cg_get_error() );
762 if ( coords[ spaceDim-1 ].empty() )
763 continue; // there was an error while reading coordinates
765 // fill coords with zero if spaceDim < 3
766 for ( int c = 2; c <= 3; ++c)
767 if ( coords[ c-1 ].empty() )
768 coords[ c-1 ].resize( nbNodes, 0.0 );
771 MESSAGE(" create nodes");
773 for ( int i = 0; i < nbNodes; ++i )
774 myMesh->AddNodeWithID( coords[0][i], coords[1][i], coords[2][i], i+1+zone._nodeIdShift );
776 catch ( std::exception& exc ) // expect std::bad_alloc
778 addMessage( exc.what() );
782 // Read connectivity between zones. Nodes of the zone interface will be
783 // replaced within the zones read later
784 string err = zone.ReadZonesConnection( _fn, cgnsBase, zonesByName, myMesh );
791 MESSAGE(" read elements");
792 if ( zone.IsStructured())
794 int nbI = zone._sizeX - 1, nbJ = zone._sizeY - 1, nbK = zone._sizeZ - 1;
796 if ( meshDim > 2 && nbK > 0 )
798 for ( int k = 1; k <= nbK; ++k )
799 for ( int j = 1; j <= nbJ; ++j )
800 for ( int i = 1; i <= nbI; ++i )
802 zone.CellNodes( i, j, k, nID );
803 zone.ReplaceNodes( nID, 8 );
804 myMesh->AddVolumeWithID(nID[0],nID[1],nID[2],nID[3],nID[4],nID[5],nID[6],nID[7],
805 meshInfo.NbElements()+1);
808 else if ( meshDim > 1 && nbJ > 0 )
810 for ( int j = 1; j <= nbJ; ++j )
811 for ( int i = 1; i <= nbI; ++i )
813 zone.CellNodes( i, j, nID );
814 zone.ReplaceNodes( nID, 4 );
815 myMesh->AddFaceWithID(nID[0],nID[1],nID[2],nID[3], meshInfo.NbElements()+1);
818 else if ( meshDim > 0 && nbI > 0 )
820 nID[0] = zone.NodeID( 1, 0, 0 );
821 for ( int i = 1; i <= nbI; ++i, ++nID[0] )
824 zone.ReplaceNodes( nID, 2 );
825 myMesh->AddEdgeWithID(nID[0],nID[1], meshInfo.NbElements()+1);
831 // elements can be stored in different sections each dedicated to one element type
833 if ( cg_nsections( _fn, cgnsBase, iZone, &nbSections) != CG_OK)
835 addMessage( cg_get_error() );
838 PAddElemFun* addElemFuns = getAddElemFunTable(), curAddElemFun = 0;
839 int nbNotSuppElem = 0; // nb elements of not supported types
840 bool polyhedError = false; // error at polyhedron creation
844 MESSAGE(" read element data");
845 CGNS_ENUMT( ElementType_t ) elemType;
846 cgsize_t start, end; // range of ids of elements of a zone
847 cgsize_t eDataSize = 0;
848 int nbBnd, parent_flag;
849 for ( int iSec = 1; iSec <= nbSections; ++iSec )
851 MESSAGE(" section " << iSec << " of " << nbSections);
852 if ( cg_section_read( _fn, cgnsBase, iZone, iSec, name, &elemType,
853 &start, &end, &nbBnd, &parent_flag) != CG_OK ||
854 cg_ElementDataSize( _fn, cgnsBase, iZone, iSec, &eDataSize ) != CG_OK )
856 addMessage( cg_get_error() );
859 vector< cgsize_t > elemData( eDataSize );
860 if ( cg_elements_read( _fn, cgnsBase, iZone, iSec, &elemData[0], NULL ) != CG_OK )
862 addMessage( cg_get_error() );
867 MESSAGE(" store elements");
868 int pos = 0, cgnsNbNodes = 0, elemID = start + zone._elemIdShift;
869 cg_npe( elemType, &cgnsNbNodes ); // get nb nodes by element type
870 curAddElemFun = addElemFuns[ elemType ];
871 SMDS_MeshElement* newElem = 0;
872 const SMDS_MeshElement* face;
874 while ( pos < eDataSize )
876 CGNS_ENUMT( ElementType_t ) currentType = elemType;
877 if ( currentType == CGNS_ENUMV( MIXED )) {
878 //ElementConnectivity = Etype1, Node11, Node21, ... NodeN1,
879 // Etype2, Node12, Node22, ... NodeN2,
881 // EtypeM, Node1M, Node2M, ... NodeNM
882 currentType = (CGNS_ENUMT(ElementType_t)) elemData[ pos++ ];
883 cg_npe( currentType, &cgnsNbNodes );
884 curAddElemFun = addElemFuns[ currentType ];
886 if ( cgnsNbNodes < 1 ) // poly elements
888 if ( currentType == CGNS_ENUMV( NFACE_n )) // polyhedron
890 //ElementConnectivity = Nfaces1, Face11, Face21, ... FaceN1,
891 // Nfaces2, Face12, Face22, ... FaceN2,
893 // NfacesM, Face1M, Face2M, ... FaceNM
894 const int nbFaces = elemData[ pos++ ];
895 vector<int> quantities( nbFaces );
896 vector<const SMDS_MeshNode*> nodes, faceNodes;
897 nodes.reserve( nbFaces * 4 );
898 for ( int iF = 0; iF < nbFaces; ++iF )
900 const int faceID = std::abs( elemData[ pos++ ]) + zone._elemIdShift;
901 if (( face = myMesh->FindElement( faceID )) && face->GetType() == SMDSAbs_Face )
903 const bool reverse = ( elemData[ pos-1 ] < 0 );
904 const int iQuad = face->IsQuadratic() ? 1 : 0;
905 SMDS_NodeIteratorPtr nIter = face->interlacedNodesIterator();
906 faceNodes.assign( SMDS_MeshElement::iterator( nIter ),
907 SMDS_MeshElement::iterator());
908 if ( iQuad && reverse )
909 nodes.push_back( faceNodes[0] );
911 nodes.insert( nodes.end(), faceNodes.rbegin(), faceNodes.rend() - iQuad );
913 nodes.insert( nodes.end(), faceNodes.begin(), faceNodes.end() );
915 quantities[ iF ] = face->NbNodes();
922 if ( quantities.back() )
924 myMesh->AddPolyhedralVolumeWithID( nodes, quantities, elemID );
927 else if ( currentType == CGNS_ENUMV( NGON_n )) // polygon
929 // ElementConnectivity = Nnodes1, Node11, Node21, ... NodeN1,
930 // Nnodes2, Node12, Node22, ... NodeN2,
932 // NnodesM, Node1M, Node2M, ... NodeNM
933 const int nbNodes = elemData[ pos ];
934 zone.ReplaceNodes( &elemData[pos+1], nbNodes, zone._nodeIdShift );
935 newElem = add_NGON( &elemData[pos ], myMesh, elemID );
939 else // standard elements
941 zone.ReplaceNodes( &elemData[pos], cgnsNbNodes, zone._nodeIdShift );
942 newElem = curAddElemFun( &elemData[pos], myMesh, elemID );
944 nbNotSuppElem += int( newElem && newElem->NbNodes() != cgnsNbNodes );
948 } // loop on elemData
949 } // loop on cgns sections
951 if ( nbNotSuppElem > 0 )
952 addMessage( SMESH_Comment(nbNotSuppElem) << " elements of not supported types"
953 << " have beem converted to close types");
955 addMessage( "Some polyhedral elements have been skipped due to internal(?) errors" );
957 } // reading unstructured elements
959 zone._nbNodes = meshInfo.NbNodes() - zone._nodeIdShift;
960 zone._nbElems = meshInfo.NbElements() - zone._elemIdShift;
962 // -------------------------------------------
963 // Read Boundary Conditions into SMESH groups
964 // -------------------------------------------
966 MESSAGE(" read Boundary Conditions");
968 if ( cg_nbocos( _fn, cgnsBase, iZone, &nbBC) == CG_OK )
970 CGNS_ENUMT( BCType_t ) bcType;
971 CGNS_ENUMT( PointSetType_t ) psType;
972 CGNS_ENUMT( DataType_t ) normDataType;
973 cgsize_t nbPnt, normFlag;
974 int normIndex[3], nbDS;
975 MESSAGE(" nbBC: " << nbBC);
976 for ( int iBC = 1; iBC <= nbBC; ++iBC )
978 MESSAGE(" iBC: " << iBC);
979 if ( cg_boco_info( _fn, cgnsBase, iZone, iBC, name, &bcType, &psType,
980 &nbPnt, normIndex, &normFlag, &normDataType, &nbDS ) != CG_OK )
982 addMessage( cg_get_error() );
985 MESSAGE(" iBC info OK: " << iBC);
986 vector< cgsize_t > ids( nbPnt * zone.IndexSize() );
987 CGNS_ENUMT( GridLocation_t ) location;
988 if ( cg_boco_read( _fn, cgnsBase, iZone, iBC, &ids[0], NULL ) != CG_OK ||
989 cg_boco_gridlocation_read( _fn, cgnsBase, iZone, iBC, &location) != CG_OK )
991 addMessage( cg_get_error() );
994 SMDSAbs_ElementType elemType = SMDSAbs_All;
995 switch ( location ) {
996 case CGNS_ENUMV( Vertex ): elemType = SMDSAbs_Node; break;
997 case CGNS_ENUMV( FaceCenter ): elemType = SMDSAbs_Face; break;
998 case CGNS_ENUMV( IFaceCenter ): elemType = SMDSAbs_Face; break;
999 case CGNS_ENUMV( JFaceCenter ): elemType = SMDSAbs_Face; break;
1000 case CGNS_ENUMV( KFaceCenter ): elemType = SMDSAbs_Face; break;
1001 case CGNS_ENUMV( EdgeCenter ): elemType = SMDSAbs_Edge; break;
1004 SMESHDS_Group* group = new SMESHDS_Group ( groupID++, myMesh, elemType );
1005 myMesh->AddGroup( group );
1006 SMESH_Comment groupName( name ); groupName << " " << cg_BCTypeName( bcType );
1007 group->SetStoreName( groupName.c_str() );
1008 SMDS_MeshGroup& groupDS = group->SMDSGroup();
1010 if ( elemType == SMDSAbs_Node )
1012 if ( zone.IsStructured() )
1014 vector< cgsize_t > nodeIds;
1015 if ( psType == CGNS_ENUMV( PointRange ))
1017 // nodes are given as (ijkMin, ijkMax)
1018 TPointRangeIterator idIt( & ids[0], meshDim );
1019 nodeIds.reserve( idIt.Size() );
1020 while ( idIt.More() )
1021 nodeIds.push_back( zone.NodeID( idIt.Next() ));
1025 // nodes are given as (ijk1, ijk2, ..., ijkN)
1026 nodeIds.reserve( ids.size() / meshDim );
1027 for ( size_t i = 0; i < ids.size(); i += meshDim )
1028 nodeIds.push_back( zone.NodeID( ids[i], ids[i+1], ids[i+2] ));
1030 ids.swap( nodeIds );
1032 else if ( zone._nodeIdShift )
1034 for ( size_t i = 0; i < ids.size(); ++i )
1035 ids[i] += zone._nodeIdShift;
1037 zone.ReplaceNodes( &ids[0], ids.size() );
1039 for ( size_t i = 0; i < ids.size(); ++i )
1040 if ( const SMDS_MeshNode* n = myMesh->FindNode( ids[i] ))
1043 else // BC applied to elements
1045 if ( zone.IsStructured() )
1047 int axis = 0; // axis perpendiculaire to which boundary elements are oriented
1048 if ( (int) ids.size() >= meshDim * 2 )
1050 for ( ; axis < meshDim; ++axis )
1051 if ( ids[axis] - ids[axis+meshDim] == 0 )
1056 for ( ; axis < meshDim; ++axis )
1057 if ( normIndex[axis] != 0 )
1060 if ( axis == meshDim )
1062 addMessage( SMESH_Comment("Invalid NormalIndex in BC ") << name );
1065 const int nbElemNodesByDim[] = { 1, 2, 4, 8 };
1066 const int nbElemNodes = nbElemNodesByDim[ meshDim ];
1068 if ( psType == CGNS_ENUMV( PointRange ) ||
1069 psType == CGNS_ENUMV( ElementRange ))
1071 // elements are given as (ijkMin, ijkMax)
1072 typedef void (TZoneData::*PGetNodesFun)( const gp_XYZ& ijk, cgsize_t* ids ) const;
1073 PGetNodesFun getNodesFun = 0;
1074 if ( elemType == SMDSAbs_Face && meshDim == 3 )
1076 case 0: getNodesFun = & TZoneData::IFaceNodes; break;
1077 case 1: getNodesFun = & TZoneData::JFaceNodes; break;
1078 case 2: getNodesFun = & TZoneData::KFaceNodes; break;
1080 else if ( elemType == SMDSAbs_Edge && meshDim == 2 )
1082 case 0: getNodesFun = & TZoneData::IEdgeNodes; break;
1083 case 1: getNodesFun = & TZoneData::JEdgeNodes; break;
1087 addMessage( SMESH_Comment("Unsupported BC location in BC ") << name
1088 << " " << cg_GridLocationName( location )
1089 << " in " << meshDim << " mesh");
1092 TPointRangeIterator rangeIt( & ids[0], meshDim );
1093 vector< cgsize_t > elemNodeIds( rangeIt.Size() * nbElemNodes );
1094 for ( int i = 0; rangeIt.More(); i+= nbElemNodes )
1095 (zone.*getNodesFun)( rangeIt.Next(), &elemNodeIds[i] );
1097 ids.swap( elemNodeIds );
1101 // elements are given as (ijk1, ijk2, ..., ijkN)
1102 typedef void (TZoneData::*PGetNodesFun)( int i, int j, int k, cgsize_t* ids ) const;
1103 PGetNodesFun getNodesFun = 0;
1104 if ( elemType == SMDSAbs_Face )
1106 case 0: getNodesFun = & TZoneData::IFaceNodes; break;
1107 case 1: getNodesFun = & TZoneData::JFaceNodes; break;
1108 case 2: getNodesFun = & TZoneData::KFaceNodes; break;
1110 else if ( elemType == SMDSAbs_Edge && meshDim == 2 )
1112 case 0: getNodesFun = & TZoneData::IEdgeNodes; break;
1113 case 1: getNodesFun = & TZoneData::JEdgeNodes; break;
1117 addMessage( SMESH_Comment("Unsupported BC location in BC ") << name
1118 << " " << cg_GridLocationName( location )
1119 << " in " << meshDim << " mesh");
1122 vector< cgsize_t > elemNodeIds( ids.size()/meshDim * nbElemNodes );
1123 for ( size_t i = 0, j = 0; i < ids.size(); i += meshDim, j += nbElemNodes )
1124 (zone.*getNodesFun)( ids[i], ids[i+1], ids[i+2], &elemNodeIds[j] );
1126 ids.swap( elemNodeIds );
1128 zone.ReplaceNodes( &ids[0], ids.size() );
1130 PAddElemFun addElemFun = 0;
1131 switch ( meshDim ) {
1132 case 1: addElemFun = & add_BAR_2; break;
1133 case 2: addElemFun = & add_QUAD_4; break;
1134 case 3: addElemFun = & add_HEXA_8; break;
1136 int elemID = meshInfo.NbElements();
1137 const SMDS_MeshElement* elem = 0;
1138 for ( size_t i = 0; i < ids.size(); i += nbElemNodes )
1140 if ( iZone == 1 || !( elem = findElement( &ids[i], nbElemNodes, myMesh )))
1141 elem = addElemFun( &ids[i], myMesh, ++elemID );
1142 groupDS.Add( elem );
1145 else // unstructured zone
1147 if ( zone._elemIdShift )
1148 for ( size_t i = 0; i < ids.size(); ++i )
1149 ids[i] += zone._elemIdShift;
1151 if ( psType == CGNS_ENUMV( PointRange ) && ids.size() == 2 )
1153 for ( cgsize_t i = ids[0]; i <= ids[1]; ++i )
1154 if ( const SMDS_MeshElement* e = myMesh->FindElement( i ))
1159 for ( size_t i = 0; i < ids.size(); ++i )
1160 if ( const SMDS_MeshElement* e = myMesh->FindElement( ids[i] ))
1164 } // end "BC applied to elements"
1166 // to have group type according to a real elem type
1167 group->SetType( groupDS.GetType() );
1169 } // loop on BCs of the zone
1171 else addMessage( cg_get_error() );
1174 MESSAGE(" read flow solutions");
1176 if ( cg_nsols( _fn, cgnsBase, iZone, &nsols) == CG_OK )
1178 MESSAGE(" nb flow solutions: " << nsols);
1180 else addMessage( cg_get_error() );
1182 MESSAGE(" read discrete data");
1184 if ( cg_ndiscrete( _fn, cgnsBase, iZone, &nbdiscrete) == CG_OK )
1186 MESSAGE(" nb discrete data: " << nbdiscrete);
1187 char nameDiscrete[CGNS_NAME_SIZE];
1188 for (int idisc = 1; idisc <= nbdiscrete; idisc++)
1190 if ( cg_discrete_read( _fn, cgnsBase, iZone, idisc, nameDiscrete) == CG_OK )
1192 MESSAGE(" discrete data #"<< idisc << " name: " << nameDiscrete);
1193 PointSetType_t ptset_type;
1195 if ( cg_discrete_ptset_info( _fn, cgnsBase, iZone, idisc, &ptset_type, &npnts) == CG_OK )
1197 MESSAGE(" discrete data #"<< idisc << " npnts: " << npnts);
1199 else addMessage( cg_get_error() );
1201 else addMessage( cg_get_error() );
1204 else addMessage( cg_get_error() );
1207 MESSAGE(" read subregions");
1209 if ( cg_nsubregs( _fn, cgnsBase, iZone, &nbSubrg) == CG_OK )
1211 MESSAGE(" nb subregions: " << nbSubrg);
1213 else addMessage( cg_get_error() );
1215 MESSAGE(" end zone");
1216 } // loop on the zones of a mesh
1218 MESSAGE("read families");
1220 if ( cg_nfamilies( _fn, cgnsBase, &nbFam) == CG_OK )
1222 MESSAGE("nb families: " << nbFam);
1224 else addMessage( cg_get_error() );
1228 // ------------------------------------------------------------------------
1229 // Make groups for multiple zones and remove free nodes at zone interfaces
1230 // ------------------------------------------------------------------------
1231 map< string, TZoneData >::iterator nameZoneIt = zonesByName.begin();
1232 for ( ; nameZoneIt != zonesByName.end(); ++nameZoneIt )
1234 MESSAGE("nameZone: " << nameZoneIt->first);
1235 TZoneData& zone = nameZoneIt->second;
1236 if ( zone._nbElems == 0 ) continue;
1237 if ( zone._nbElems == meshInfo.NbElements() ) break; // there is only one non-empty zone
1240 SMDSAbs_ElementType elemType = myMesh->GetElementType( zone._elemIdShift + 1,
1242 SMESHDS_Group* group = new SMESHDS_Group ( groupID++, myMesh, elemType );
1243 myMesh->AddGroup( group );
1244 group->SetStoreName( nameZoneIt->first.c_str() );
1245 SMDS_MeshGroup& groupDS = group->SMDSGroup();
1247 for ( int i = 1; i <= zone._nbElems; ++i )
1248 if ( const SMDS_MeshElement* e = myMesh->FindElement( i + zone._elemIdShift ))
1251 // remove free nodes
1252 map< int, int >::iterator nnRmKeepIt = zone._nodeReplacementMap.begin();
1253 for ( ; nnRmKeepIt != zone._nodeReplacementMap.end(); ++nnRmKeepIt )
1254 if ( const SMDS_MeshNode* n = myMesh->FindNode( nnRmKeepIt->first ))
1255 if ( n->NbInverseElements() == 0 )
1256 myMesh->RemoveFreeNode( n, (SMESHDS_SubMesh *)0, /*fromGroups=*/false );
1259 aResult = myErrorMessages.empty() ? DRS_OK : DRS_WARN_SKIP_ELEM;
1262 myMesh->CompactMesh();
1263 MESSAGE("end perform");
1267 //================================================================================
1269 * \brief Constructor
1271 //================================================================================
1273 DriverCGNS_Read::DriverCGNS_Read()
1277 //================================================================================
1279 * \brief Close the cgns file at destruction
1281 //================================================================================
1283 DriverCGNS_Read::~DriverCGNS_Read()
1289 //================================================================================
1291 * \brief Opens myFile
1293 //================================================================================
1295 Driver_Mesh::Status DriverCGNS_Read::open()
1301 int res = cg_open(myFile.c_str(), CG_MODE_READ, &_fn);
1303 int res = cg_open(myFile.c_str(), MODE_READ, &_fn);
1307 addMessage( cg_get_error(), /*fatal = */true );
1310 return _fn >= 0 ? DRS_OK : DRS_FAIL;
1313 //================================================================================
1315 * \brief Reads nb of meshes in myFile
1317 //================================================================================
1319 int DriverCGNS_Read::GetNbMeshes(Status& theStatus)
1321 if (( theStatus = open()) != DRS_OK )
1325 if(cg_nbases( _fn, &nbases) != CG_OK)
1326 theStatus = addMessage( cg_get_error(), /*fatal = */true );