+namespace // automatically find theAffectedElems for DoubleNodes()
+{
+ bool isOut( const SMDS_MeshNode* n, const gp_XYZ& norm, const SMDS_MeshElement* elem );
+
+ //--------------------------------------------------------------------------------
+ // Nodes shared by adjacent FissureBorder's.
+ // 1 node if FissureBorder separates faces
+ // 2 nodes if FissureBorder separates volumes
+ struct SubBorder
+ {
+ const SMDS_MeshNode* _nodes[2];
+ int _nbNodes;
+
+ SubBorder( const SMDS_MeshNode* n1, const SMDS_MeshNode* n2 = 0 )
+ {
+ _nodes[0] = n1;
+ _nodes[1] = n2;
+ _nbNodes = bool( n1 ) + bool( n2 );
+ if ( _nbNodes == 2 && n1 > n2 )
+ std::swap( _nodes[0], _nodes[1] );
+ }
+ bool operator<( const SubBorder& other ) const
+ {
+ for ( int i = 0; i < _nbNodes; ++i )
+ {
+ if ( _nodes[i] < other._nodes[i] ) return true;
+ if ( _nodes[i] > other._nodes[i] ) return false;
+ }
+ return false;
+ }
+ };
+
+ //--------------------------------------------------------------------------------
+ // Map a SubBorder to all FissureBorder it bounds
+ struct FissureBorder;
+ typedef std::map< SubBorder, std::vector< FissureBorder* > > TBorderLinks;
+ typedef TBorderLinks::iterator TMappedSub;
+
+ //--------------------------------------------------------------------------------
+ /*!
+ * \brief Element border (volume facet or face edge) at a fissure
+ */
+ struct FissureBorder
+ {
+ std::vector< const SMDS_MeshNode* > _nodes; // border nodes
+ const SMDS_MeshElement* _elems[2]; // volume or face adjacent to fissure
+
+ std::vector< TMappedSub > _mappedSubs; // Sub() in TBorderLinks map
+ std::vector< const SMDS_MeshNode* > _sortedNodes; // to compare FissureBorder's
+
+ FissureBorder( FissureBorder && from ) // move constructor
+ {
+ std::swap( _nodes, from._nodes );
+ std::swap( _sortedNodes, from._sortedNodes );
+ _elems[0] = from._elems[0];
+ _elems[1] = from._elems[1];
+ }
+
+ FissureBorder( const SMDS_MeshElement* elemToDuplicate,
+ std::vector< const SMDS_MeshElement* > & adjElems)
+ : _nodes( elemToDuplicate->NbCornerNodes() )
+ {
+ for ( size_t i = 0; i < _nodes.size(); ++i )
+ _nodes[i] = elemToDuplicate->GetNode( i );
+
+ SMDSAbs_ElementType type = SMDSAbs_ElementType( elemToDuplicate->GetType() + 1 );
+ findAdjacent( type, adjElems );
+ }
+
+ FissureBorder( const SMDS_MeshNode** nodes,
+ const size_t nbNodes,
+ const SMDSAbs_ElementType adjElemsType,
+ std::vector< const SMDS_MeshElement* > & adjElems)
+ : _nodes( nodes, nodes + nbNodes )
+ {
+ findAdjacent( adjElemsType, adjElems );
+ }
+
+ void findAdjacent( const SMDSAbs_ElementType adjElemsType,
+ std::vector< const SMDS_MeshElement* > & adjElems)
+ {
+ _elems[0] = _elems[1] = 0;
+ adjElems.clear();
+ if ( SMDS_Mesh::GetElementsByNodes( _nodes, adjElems, adjElemsType ))
+ for ( size_t i = 0; i < adjElems.size() && i < 2; ++i )
+ _elems[i] = adjElems[i];
+ }
+
+ bool operator<( const FissureBorder& other ) const
+ {
+ return GetSortedNodes() < other.GetSortedNodes();
+ }
+
+ const std::vector< const SMDS_MeshNode* >& GetSortedNodes() const
+ {
+ if ( _sortedNodes.empty() && !_nodes.empty() )
+ {
+ FissureBorder* me = const_cast<FissureBorder*>( this );
+ me->_sortedNodes = me->_nodes;
+ std::sort( me->_sortedNodes.begin(), me->_sortedNodes.end() );
+ }
+ return _sortedNodes;
+ }
+
+ size_t NbSub() const
+ {
+ return _nodes.size();
+ }
+
+ SubBorder Sub(size_t i) const
+ {
+ return SubBorder( _nodes[i], NbSub() > 2 ? _nodes[ (i+1)%NbSub() ] : 0 );
+ }
+
+ void AddSelfTo( TBorderLinks& borderLinks )
+ {
+ _mappedSubs.resize( NbSub() );
+ for ( size_t i = 0; i < NbSub(); ++i )
+ {
+ TBorderLinks::iterator s2b =
+ borderLinks.insert( std::make_pair( Sub(i), TBorderLinks::mapped_type() )).first;
+ s2b->second.push_back( this );
+ _mappedSubs[ i ] = s2b;
+ }
+ }
+
+ void Clear()
+ {
+ _nodes.clear();
+ }
+
+ const SMDS_MeshElement* GetMarkedElem() const
+ {
+ if ( _nodes.empty() ) return 0; // cleared
+ if ( _elems[0] && _elems[0]->isMarked() ) return _elems[0];
+ if ( _elems[1] && _elems[1]->isMarked() ) return _elems[1];
+ return 0;
+ }
+
+ gp_XYZ GetNorm() const // normal to the border
+ {
+ gp_XYZ norm;
+ if ( _nodes.size() == 2 )
+ {
+ gp_XYZ avgNorm( 0,0,0 ); // sum of normals of adjacent faces
+ if ( SMESH_MeshAlgos::FaceNormal( _elems[0], norm ))
+ avgNorm += norm;
+ if ( SMESH_MeshAlgos::FaceNormal( _elems[1], norm ))
+ avgNorm += norm;
+
+ gp_XYZ bordDir( SMESH_NodeXYZ( _nodes[0] ) - SMESH_NodeXYZ( _nodes[1] ));
+ norm = bordDir ^ avgNorm;
+ }
+ else
+ {
+ SMESH_NodeXYZ p0( _nodes[0] );
+ SMESH_NodeXYZ p1( _nodes[1] );
+ SMESH_NodeXYZ p2( _nodes[2] );
+ norm = ( p0 - p1 ) ^ ( p2 - p1 );
+ }
+ if ( isOut( _nodes[0], norm, GetMarkedElem() ))
+ norm.Reverse();
+
+ return norm;
+ }
+
+ void ChooseSide() // mark an _elem located at positive side of fissure
+ {
+ _elems[0]->setIsMarked( true );
+ gp_XYZ norm = GetNorm();
+ double maxX = norm.Coord(1);
+ if ( Abs( maxX ) < Abs( norm.Coord(2)) ) maxX = norm.Coord(2);
+ if ( Abs( maxX ) < Abs( norm.Coord(3)) ) maxX = norm.Coord(3);
+ if ( maxX < 0 )
+ {
+ _elems[0]->setIsMarked( false );
+ _elems[1]->setIsMarked( true );
+ }
+ }
+
+ }; // struct FissureBorder
+
+ //--------------------------------------------------------------------------------
+ /*!
+ * \brief Classifier of elements at fissure edge
+ */
+ class FissureNormal
+ {
+ std::vector< gp_XYZ > _normals;
+ bool _bothIn;
+
+ public:
+ void Add( const SMDS_MeshNode* n, const FissureBorder& bord )
+ {
+ _bothIn = false;
+ _normals.reserve(2);
+ _normals.push_back( bord.GetNorm() );
+ if ( _normals.size() == 2 )
+ _bothIn = !isOut( n, _normals[0], bord.GetMarkedElem() );
+ }
+
+ bool IsIn( const SMDS_MeshNode* n, const SMDS_MeshElement* elem ) const
+ {
+ bool isIn = false;
+ switch ( _normals.size() ) {
+ case 1:
+ {
+ isIn = !isOut( n, _normals[0], elem );
+ break;
+ }
+ case 2:
+ {
+ bool in1 = !isOut( n, _normals[0], elem );
+ bool in2 = !isOut( n, _normals[1], elem );
+ isIn = _bothIn ? ( in1 && in2 ) : ( in1 || in2 );
+ }
+ }
+ return isIn;
+ }
+ };
+
+ //================================================================================
+ /*!
+ * \brief Classify an element by a plane passing through a node
+ */
+ //================================================================================
+
+ bool isOut( const SMDS_MeshNode* n, const gp_XYZ& norm, const SMDS_MeshElement* elem )
+ {
+ SMESH_NodeXYZ p = n;
+ double sumDot = 0;
+ for ( int i = 0, nb = elem->NbCornerNodes(); i < nb; ++i )
+ {
+ SMESH_NodeXYZ pi = elem->GetNode( i );
+ sumDot += norm * ( pi - p );
+ }
+ return sumDot < -1e-100;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Find FissureBorder's by nodes to duplicate
+ */
+ //================================================================================
+
+ void findFissureBorders( const TIDSortedElemSet& theNodes,
+ std::vector< FissureBorder > & theFissureBorders )
+ {
+ TIDSortedElemSet::const_iterator nIt = theNodes.begin();
+ const SMDS_MeshNode* n = dynamic_cast< const SMDS_MeshNode*>( *nIt );
+ if ( !n ) return;
+ SMDSAbs_ElementType elemType = SMDSAbs_Volume;
+ if ( n->NbInverseElements( elemType ) == 0 )
+ {
+ elemType = SMDSAbs_Face;
+ if ( n->NbInverseElements( elemType ) == 0 )
+ return;
+ }
+ // unmark elements touching the fissure
+ for ( ; nIt != theNodes.end(); ++nIt )
+ SMESH_MeshAlgos::MarkElems( cast2Node(*nIt)->GetInverseElementIterator(), false );
+
+ // loop on elements touching the fissure to get their borders belonging to the fissure
+ std::set< FissureBorder > fissureBorders;
+ std::vector< const SMDS_MeshElement* > adjElems;
+ std::vector< const SMDS_MeshNode* > nodes;
+ SMDS_VolumeTool volTool;
+ for ( nIt = theNodes.begin(); nIt != theNodes.end(); ++nIt )
+ {
+ SMDS_ElemIteratorPtr invIt = cast2Node(*nIt)->GetInverseElementIterator( elemType );
+ while ( invIt->more() )
+ {
+ const SMDS_MeshElement* eInv = invIt->next();
+ if ( eInv->isMarked() ) continue;
+ eInv->setIsMarked( true );
+
+ if ( elemType == SMDSAbs_Volume )
+ {
+ volTool.Set( eInv );
+ int iQuad = eInv->IsQuadratic() ? 2 : 1;
+ for ( int iF = 0, nbF = volTool.NbFaces(); iF < nbF; ++iF )
+ {
+ const SMDS_MeshNode** nn = volTool.GetFaceNodes( iF );
+ int nbN = volTool.NbFaceNodes( iF ) / iQuad;
+ nodes.clear();
+ bool allOnFissure = true;
+ for ( int iN = 0; iN < nbN && allOnFissure; iN += iQuad )
+ if (( allOnFissure = theNodes.count( nn[ iN ])))
+ nodes.push_back( nn[ iN ]);
+ if ( allOnFissure )
+ fissureBorders.insert( std::move( FissureBorder( &nodes[0], nodes.size(),
+ elemType, adjElems )));
+ }
+ }
+ else // elemType == SMDSAbs_Face
+ {
+ const SMDS_MeshNode* nn[2] = { eInv->GetNode( eInv->NbCornerNodes()-1 ), 0 };
+ bool onFissure0 = theNodes.count( nn[0] ), onFissure1;
+ for ( int iN = 0, nbN = eInv->NbCornerNodes(); iN < nbN; ++iN )
+ {
+ nn[1] = eInv->GetNode( iN );
+ onFissure1 = theNodes.count( nn[1] );
+ if ( onFissure0 && onFissure1 )
+ fissureBorders.insert( std::move( FissureBorder( nn, 2, elemType, adjElems )));
+ nn[0] = nn[1];
+ onFissure0 = onFissure1;
+ }
+ }
+ }
+ }
+
+ theFissureBorders.reserve( theFissureBorders.size() + fissureBorders.size());
+ std::set< FissureBorder >::iterator bord = fissureBorders.begin();
+ for ( ; bord != fissureBorders.end(); ++bord )
+ {
+ theFissureBorders.push_back( std::move( const_cast<FissureBorder&>( *bord ) ));
+ }
+ return;
+ } // findFissureBorders()
+
+ //================================================================================
+ /*!
+ * \brief Find elements on one side of a fissure defined by elements or nodes to duplicate
+ * \param [in] theElemsOrNodes - elements or nodes to duplicate
+ * \param [in] theNodesNot - nodes not to duplicate
+ * \param [out] theAffectedElems - the found elements
+ */
+ //================================================================================
+
+ void findAffectedElems( const TIDSortedElemSet& theElemsOrNodes,
+ TIDSortedElemSet& theAffectedElems)
+ {
+ if ( theElemsOrNodes.empty() ) return;
+
+ // find FissureBorder's
+
+ std::vector< FissureBorder > fissure;
+ std::vector< const SMDS_MeshElement* > elemsByFacet;
+
+ TIDSortedElemSet::const_iterator elIt = theElemsOrNodes.begin();
+ if ( (*elIt)->GetType() == SMDSAbs_Node )
+ {
+ findFissureBorders( theElemsOrNodes, fissure );
+ }
+ else
+ {
+ fissure.reserve( theElemsOrNodes.size() );
+ for ( ; elIt != theElemsOrNodes.end(); ++elIt )
+ fissure.push_back( std::move( FissureBorder( *elIt, elemsByFacet )));
+ }
+ if ( fissure.empty() )
+ return;
+
+ // fill borderLinks
+
+ TBorderLinks borderLinks;
+
+ for ( size_t i = 0; i < fissure.size(); ++i )
+ {
+ fissure[i].AddSelfTo( borderLinks );
+ }
+
+ // get theAffectedElems
+
+ // unmark elements having nodes on the fissure, theAffectedElems elements will be marked
+ for ( size_t i = 0; i < fissure.size(); ++i )
+ for ( size_t j = 0; j < fissure[i]._nodes.size(); ++j )
+ {
+ SMESH_MeshAlgos::MarkElemNodes( fissure[i]._nodes[j]->GetInverseElementIterator(),
+ false, /*markElem=*/true );
+ }
+
+ std::vector<const SMDS_MeshNode *> facetNodes;
+ std::map< const SMDS_MeshNode*, FissureNormal > fissEdgeNodes2Norm;
+ boost::container::flat_set< const SMDS_MeshNode* > fissureNodes;
+
+ // choose a side of fissure
+ fissure[0].ChooseSide();
+ theAffectedElems.insert( fissure[0].GetMarkedElem() );
+
+ size_t nbCheckedBorders = 0;
+ while ( nbCheckedBorders < fissure.size() )
+ {
+ // find a FissureBorder to treat
+ FissureBorder* bord = 0;
+ for ( size_t i = 0; i < fissure.size() && !bord; ++i )
+ if ( fissure[i].GetMarkedElem() )
+ bord = & fissure[i];
+ for ( size_t i = 0; i < fissure.size() && !bord; ++i )
+ if ( fissure[i].NbSub() > 0 && fissure[i]._elems[0] )
+ {
+ bord = & fissure[i];
+ bord->ChooseSide();
+ theAffectedElems.insert( bord->GetMarkedElem() );
+ }
+ if ( !bord ) return;
+ ++nbCheckedBorders;
+
+ // treat FissureBorder's linked to bord
+ fissureNodes.clear();
+ fissureNodes.insert( bord->_nodes.begin(), bord->_nodes.end() );
+ for ( size_t i = 0; i < bord->NbSub(); ++i )
+ {
+ TBorderLinks::iterator l2b = bord->_mappedSubs[ i ];
+ if ( l2b == borderLinks.end() || l2b->second.empty() ) continue;
+ std::vector< FissureBorder* >& linkedBorders = l2b->second;
+ const SubBorder& sb = l2b->first;
+ const SMDS_MeshElement* bordElem = bord->GetMarkedElem();
+
+ if ( linkedBorders.size() == 1 ) // fissure edge reached, fill fissEdgeNodes2Norm
+ {
+ for ( int j = 0; j < sb._nbNodes; ++j )
+ fissEdgeNodes2Norm[ sb._nodes[j] ].Add( sb._nodes[j], *bord );
+ continue;
+ }
+
+ // add to theAffectedElems elems sharing nodes of a SubBorder and a node of bordElem
+ // until an elem adjacent to a neighbour FissureBorder is found
+ facetNodes.clear();
+ facetNodes.insert( facetNodes.end(), sb._nodes, sb._nodes + sb._nbNodes );
+ facetNodes.resize( sb._nbNodes + 1 );
+
+ while ( bordElem )
+ {
+ // check if bordElem is adjacent to a neighbour FissureBorder
+ for ( size_t j = 0; j < linkedBorders.size(); ++j )
+ {
+ FissureBorder* bord2 = linkedBorders[j];
+ if ( bord2 == bord ) continue;
+ if ( bordElem == bord2->_elems[0] || bordElem == bord2->_elems[1] )
+ bordElem = 0;
+ else
+ fissureNodes.insert( bord2->_nodes.begin(), bord2->_nodes.end() );
+ }
+ if ( !bordElem )
+ break;
+
+ // find the next bordElem
+ const SMDS_MeshElement* nextBordElem = 0;
+ for ( int iN = 0, nbN = bordElem->NbCornerNodes(); iN < nbN && !nextBordElem; ++iN )
+ {
+ const SMDS_MeshNode* n = bordElem->GetNode( iN );
+ if ( fissureNodes.count( n )) continue;
+
+ facetNodes[ sb._nbNodes ] = n;
+ elemsByFacet.clear();
+ if ( SMDS_Mesh::GetElementsByNodes( facetNodes, elemsByFacet ) > 1 )
+ {
+ for ( size_t iE = 0; iE < elemsByFacet.size(); ++iE )
+ if ( elemsByFacet[ iE ] != bordElem &&
+ !elemsByFacet[ iE ]->isMarked() )
+ {
+ theAffectedElems.insert( elemsByFacet[ iE ]);
+ elemsByFacet[ iE ]->setIsMarked( true );
+ if ( elemsByFacet[ iE ]->GetType() == bordElem->GetType() )
+ nextBordElem = elemsByFacet[ iE ];
+ }
+ }
+ }
+ bordElem = nextBordElem;
+
+ } // while ( bordElem )
+
+ linkedBorders.clear(); // not to treat this link any more
+
+ } // loop on SubBorder's of a FissureBorder
+
+ bord->Clear();
+
+ } // loop on FissureBorder's
+
+
+ // add elements sharing only one node of the fissure, except those sharing fissure edge nodes
+
+ // mark nodes of theAffectedElems
+ SMESH_MeshAlgos::MarkElemNodes( theAffectedElems.begin(), theAffectedElems.end(), true );
+
+ // unmark nodes of the fissure
+ elIt = theElemsOrNodes.begin();
+ if ( (*elIt)->GetType() == SMDSAbs_Node )
+ SMESH_MeshAlgos::MarkElems( elIt, theElemsOrNodes.end(), false );
+ else
+ SMESH_MeshAlgos::MarkElemNodes( elIt, theElemsOrNodes.end(), false );
+
+ std::vector< gp_XYZ > normVec;
+
+ // loop on nodes of the fissure, add elements having marked nodes
+ for ( elIt = theElemsOrNodes.begin(); elIt != theElemsOrNodes.end(); ++elIt )
+ {
+ const SMDS_MeshElement* e = (*elIt);
+ if ( e->GetType() != SMDSAbs_Node )
+ e->setIsMarked( true ); // avoid adding a fissure element
+
+ for ( int iN = 0, nbN = e->NbCornerNodes(); iN < nbN; ++iN )
+ {
+ const SMDS_MeshNode* n = e->GetNode( iN );
+ if ( fissEdgeNodes2Norm.count( n ))
+ continue;
+
+ SMDS_ElemIteratorPtr invIt = n->GetInverseElementIterator();
+ while ( invIt->more() )
+ {
+ const SMDS_MeshElement* eInv = invIt->next();
+ if ( eInv->isMarked() ) continue;
+ eInv->setIsMarked( true );
+
+ SMDS_ElemIteratorPtr nIt = eInv->nodesIterator();
+ while( nIt->more() )
+ if ( nIt->next()->isMarked())
+ {
+ theAffectedElems.insert( eInv );
+ SMESH_MeshAlgos::MarkElems( eInv->nodesIterator(), true );
+ n->setIsMarked( false );
+ break;
+ }
+ }
+ }
+ }
+
+ // add elements on the fissure edge
+ std::map< const SMDS_MeshNode*, FissureNormal >::iterator n2N;
+ for ( n2N = fissEdgeNodes2Norm.begin(); n2N != fissEdgeNodes2Norm.end(); ++n2N )
+ {
+ const SMDS_MeshNode* edgeNode = n2N->first;
+ const FissureNormal & normals = n2N->second;
+
+ SMDS_ElemIteratorPtr invIt = edgeNode->GetInverseElementIterator();
+ while ( invIt->more() )
+ {
+ const SMDS_MeshElement* eInv = invIt->next();
+ if ( eInv->isMarked() ) continue;
+ eInv->setIsMarked( true );
+
+ // classify eInv using normals
+ bool toAdd = normals.IsIn( edgeNode, eInv );
+ if ( toAdd ) // check if all nodes lie on the fissure edge
+ {
+ bool notOnEdge = false;
+ for ( int iN = 0, nbN = eInv->NbCornerNodes(); iN < nbN && !notOnEdge; ++iN )
+ notOnEdge = !fissEdgeNodes2Norm.count( eInv->GetNode( iN ));
+ toAdd = notOnEdge;
+ }
+ if ( toAdd )
+ {
+ theAffectedElems.insert( eInv );
+ }
+ }
+ }
+
+ return;
+ } // findAffectedElems()
+} // namespace
+
