+ //================================================================================
+ /*!
+ * \brief Check if two consecutive EDGEs are connected in 2D
+ * \param [in] E1 - a well oriented non-seam EDGE
+ * \param [in] E2 - a possibly well oriented seam EDGE
+ * \param [in] F - a FACE
+ * \return bool - result
+ */
+ //================================================================================
+
+ bool are2dConnected( const TopoDS_Edge & E1,
+ const TopoDS_Edge & E2,
+ const TopoDS_Face & F )
+ {
+ double f,l;
+ Handle(Geom2d_Curve) c1 = BRep_Tool::CurveOnSurface( E1, F, f, l );
+ gp_Pnt2d uvFirst1 = c1->Value( f );
+ gp_Pnt2d uvLast1 = c1->Value( l );
+
+ Handle(Geom2d_Curve) c2 = BRep_Tool::CurveOnSurface( E2, F, f, l );
+ gp_Pnt2d uvFirst2 = c2->Value( E2.Orientation() == TopAbs_REVERSED ? l : f );
+ double tol2 = Max( Precision::PConfusion() * Precision::PConfusion(),
+ 1e-5 * uvLast1.SquareDistance( uvFirst1 ));
+
+ return (( uvFirst2.SquareDistance( uvFirst1 ) < tol2 ) ||
+ ( uvFirst2.SquareDistance( uvLast1 ) < tol2 ));
+ }
+
+ //================================================================================
+ /*!
+ * \brief Compose TSideVector for both FACEs keeping matching order of EDGEs
+ * and fill src2tgtNodes map
+ */
+ //================================================================================
+
+ TError getWires(const TopoDS_Face& tgtFace,
+ const TopoDS_Face& srcFace,
+ SMESH_Mesh * tgtMesh,
+ SMESH_Mesh * srcMesh,
+ SMESH_MesherHelper* tgtHelper,
+ const TAssocTool::TShapeShapeMap& shape2ShapeMap,
+ TSideVector& srcWires,
+ TSideVector& tgtWires,
+ TAssocTool::TNodeNodeMap& src2tgtNodes,
+ bool& is1DComputed)
+ {
+ src2tgtNodes.clear();
+
+ // get ordered src EDGEs
+ TError err;
+ srcWires = StdMeshers_FaceSide::GetFaceWires( srcFace, *srcMesh,/*skipMediumNodes=*/0, err );
+ if (( err && !err->IsOK() ) ||
+ ( srcWires.empty() ))
+ return err;
+#ifdef PRINT_WHO_COMPUTE_WHAT
+ cout << "Projection_2D" << " F "
+ << tgtMesh->GetMeshDS()->ShapeToIndex( tgtFace ) << " <- "
+ << srcMesh->GetMeshDS()->ShapeToIndex( srcFace ) << endl;
+#endif
+
+ // make corresponding sequence of tgt EDGEs
+ tgtWires.resize( srcWires.size() );
+ for ( size_t iW = 0; iW < srcWires.size(); ++iW )
+ {
+ StdMeshers_FaceSidePtr srcWire = srcWires[iW];
+
+ list< TopoDS_Edge > tgtEdges;
+ TopTools_IndexedMapOfShape edgeMap; // to detect seam edges
+ for ( int iE = 0; iE < srcWire->NbEdges(); ++iE )
+ {
+ TopoDS_Edge srcE = srcWire->Edge( iE );
+ TopoDS_Edge tgtE = TopoDS::Edge( shape2ShapeMap( srcE, /*isSrc=*/true));
+ TopoDS_Shape srcEbis = shape2ShapeMap( tgtE, /*isSrc=*/false );
+ if ( srcE.Orientation() != srcEbis.Orientation() )
+ tgtE.Reverse();
+ // reverse a seam edge encountered for the second time
+ const int index = edgeMap.Add( tgtE );
+ if ( index < edgeMap.Extent() ) // E is a seam
+ {
+ // check which of edges to reverse, E or one already being in tgtEdges
+ if ( are2dConnected( tgtEdges.back(), tgtE, tgtFace ))
+ {
+ list< TopoDS_Edge >::iterator eIt = tgtEdges.begin();
+ std::advance( eIt, index-1 );
+ if ( are2dConnected( tgtEdges.back(), *eIt, tgtFace ))
+ eIt->Reverse();
+ }
+ else
+ {
+ tgtE.Reverse();
+ }
+ }
+ if ( srcWire->NbEdges() == 1 && tgtMesh == srcMesh ) // circle
+ {
+ // try to verify ori by propagation
+ pair<int,TopoDS_Edge> nE =
+ StdMeshers_ProjectionUtils::GetPropagationEdge( srcMesh, tgtE, srcE );
+ if ( !nE.second.IsNull() )
+ tgtE = nE.second;
+ }
+ tgtEdges.push_back( tgtE );
+ }
+
+ tgtWires[ iW ].reset( new StdMeshers_FaceSide( tgtFace, tgtEdges, tgtMesh,
+ /*theIsForward = */ true,
+ /*theIgnoreMediumNodes = */false,
+ tgtHelper ));
+ StdMeshers_FaceSidePtr tgtWire = tgtWires[ iW ];
+
+ // Fill map of src to tgt nodes with nodes on edges
+
+ for ( int iE = 0; iE < srcWire->NbEdges(); ++iE )
+ {
+#ifdef PRINT_WHO_COMPUTE_WHAT
+ if ( tgtMesh->GetSubMesh( tgtWire->Edge(iE) )->IsEmpty() )
+ cout << "Projection_2D" << " E "
+ << tgtWire->EdgeID(iE) << " <- " << srcWire->EdgeID(iE) << endl;
+#endif
+ if ( srcMesh->GetSubMesh( srcWire->Edge(iE) )->IsEmpty() ||
+ tgtMesh->GetSubMesh( tgtWire->Edge(iE) )->IsEmpty() )
+ {
+ // add nodes on VERTEXes for a case of not meshes EDGEs
+ const SMDS_MeshNode* srcN = srcWire->VertexNode( iE );
+ const SMDS_MeshNode* tgtN = tgtWire->VertexNode( iE );
+ if ( srcN && tgtN )
+ src2tgtNodes.insert( make_pair( srcN, tgtN ));
+ }
+ else
+ {
+ const bool skipMedium = true, isFwd = true;
+ StdMeshers_FaceSide srcEdge( srcFace, srcWire->Edge(iE),
+ srcMesh, isFwd, skipMedium, srcWires[0]->FaceHelper() );
+ StdMeshers_FaceSide tgtEdge( tgtFace, tgtWire->Edge(iE),
+ tgtMesh, isFwd, skipMedium, tgtHelper);
+
+ vector< const SMDS_MeshNode* > srcNodes = srcEdge.GetOrderedNodes();
+ vector< const SMDS_MeshNode* > tgtNodes = tgtEdge.GetOrderedNodes();
+
+ if (( srcNodes.size() != tgtNodes.size() ) && tgtNodes.size() > 0 )
+ return SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH,
+ "Different number of nodes on edges");
+ if ( !tgtNodes.empty() )
+ {
+ vector< const SMDS_MeshNode* >::iterator tn = tgtNodes.begin();
+ //if ( srcWire->Edge(iE).Orientation() == tgtWire->Edge(iE).Orientation() )
+ {
+ vector< const SMDS_MeshNode* >::iterator sn = srcNodes.begin();
+ for ( ; tn != tgtNodes.end(); ++tn, ++sn)
+ src2tgtNodes.insert( make_pair( *sn, *tn ));
+ }
+ // else
+ // {
+ // vector< const SMDS_MeshNode* >::reverse_iterator sn = srcNodes.rbegin();
+ // for ( ; tn != tgtNodes.end(); ++tn, ++sn)
+ // src2tgtNodes.insert( make_pair( *sn, *tn ));
+ // }
+ is1DComputed = true;
+ }
+ }
+ } // loop on EDGEs of a WIRE
+
+ } // loop on WIREs
+
+ return TError();
+ }
+
+ //================================================================================
+ /*!
+ * \brief Perform projection in case if tgtFace.IsPartner( srcFace ) and in case
+ * if projection by 3D transformation is possible
+ */
+ //================================================================================
+
+ bool projectPartner(const TopoDS_Face& tgtFace,
+ const TopoDS_Face& srcFace,
+ const TSideVector& tgtWires,
+ const TSideVector& srcWires,
+ const TAssocTool::TShapeShapeMap& shape2ShapeMap,
+ TAssocTool::TNodeNodeMap& src2tgtNodes,
+ const bool is1DComputed)
+ {
+ SMESH_Mesh * tgtMesh = tgtWires[0]->GetMesh();
+ SMESH_Mesh * srcMesh = srcWires[0]->GetMesh();
+ SMESHDS_Mesh* tgtMeshDS = tgtMesh->GetMeshDS();
+ SMESHDS_Mesh* srcMeshDS = srcMesh->GetMeshDS();
+ SMESH_MesherHelper* helper = tgtWires[0]->FaceHelper();
+
+ const double tol = 1.e-7 * srcMeshDS->getMaxDim();
+
+ // transformation to get location of target nodes from source ones
+ StdMeshers_ProjectionUtils::TrsfFinder3D trsf;
+ bool trsfIsOK = false;
+ if ( tgtFace.IsPartner( srcFace ))
+ {
+ gp_GTrsf srcTrsf = srcFace.Location().Transformation();
+ gp_GTrsf tgtTrsf = tgtFace.Location().Transformation();
+ gp_GTrsf t = srcTrsf.Inverted().Multiplied( tgtTrsf );
+ trsf.Set( t );
+ // check
+ gp_Pnt srcP = BRep_Tool::Pnt( srcWires[0]->FirstVertex() );
+ gp_Pnt tgtP = BRep_Tool::Pnt( tgtWires[0]->FirstVertex() );
+ trsfIsOK = ( tgtP.Distance( trsf.Transform( srcP )) < tol );
+ if ( !trsfIsOK )
+ {
+ trsf.Set( tgtTrsf.Inverted().Multiplied( srcTrsf ));
+ trsfIsOK = ( tgtP.Distance( trsf.Transform( srcP )) < tol );
+ }
+ }
+ if ( !trsfIsOK )
+ {
+ // Try to find the 3D transformation
+
+ const int totNbSeg = 50;
+ vector< gp_XYZ > srcPnts, tgtPnts;
+ srcPnts.reserve( totNbSeg );
+ tgtPnts.reserve( totNbSeg );
+ gp_XYZ srcBC( 0,0,0 ), tgtBC( 0,0,0 );
+ for ( size_t iW = 0; iW < srcWires.size(); ++iW )
+ {
+ const double minSegLen = srcWires[iW]->Length() / totNbSeg;
+ for ( int iE = 0; iE < srcWires[iW]->NbEdges(); ++iE )
+ {
+ size_t nbSeg = Max( 1, int( srcWires[iW]->EdgeLength( iE ) / minSegLen ));
+ double srcU = srcWires[iW]->FirstParameter( iE );
+ double tgtU = tgtWires[iW]->FirstParameter( iE );
+ double srcDu = ( srcWires[iW]->LastParameter( iE )- srcU ) / nbSeg;
+ double tgtDu = ( tgtWires[iW]->LastParameter( iE )- tgtU ) / nbSeg;
+ for ( size_t i = 0; i < nbSeg; ++i )
+ {
+ srcPnts.push_back( srcWires[iW]->Value3d( srcU ).XYZ() );
+ tgtPnts.push_back( tgtWires[iW]->Value3d( tgtU ).XYZ() );
+ srcU += srcDu;
+ tgtU += tgtDu;
+ srcBC += srcPnts.back();
+ tgtBC += tgtPnts.back();
+ }
+ }
+ }
+ if ( !trsf.Solve( srcPnts, tgtPnts ))
+ return false;
+
+ // check trsf
+
+ const int nbTestPnt = 20;
+ const size_t iStep = Max( 1, int( srcPnts.size() / nbTestPnt ));
+ // check boundary
+ gp_Pnt trsfTgt = trsf.Transform( srcBC / srcPnts.size() );
+ trsfIsOK = ( trsfTgt.SquareDistance( tgtBC / tgtPnts.size() ) < tol*tol );
+ for ( size_t i = 0; ( i < srcPnts.size() && trsfIsOK ); i += iStep )
+ {
+ gp_Pnt trsfTgt = trsf.Transform( srcPnts[i] );
+ trsfIsOK = ( trsfTgt.SquareDistance( tgtPnts[i] ) < tol*tol );
+ }
+ // check an in-FACE point
+ if ( trsfIsOK )
+ {
+ BRepAdaptor_Surface srcSurf( srcFace );
+ gp_Pnt srcP =
+ srcSurf.Value( 0.321 * ( srcSurf.FirstUParameter() + srcSurf.LastUParameter() ),
+ 0.123 * ( srcSurf.FirstVParameter() + srcSurf.LastVParameter() ));
+ gp_Pnt tgtTrsfP = trsf.Transform( srcP );
+ TopLoc_Location loc;
+ GeomAPI_ProjectPointOnSurf& proj = helper->GetProjector( tgtFace, loc, 0.1*tol );
+ if ( !loc.IsIdentity() )
+ tgtTrsfP.Transform( loc.Transformation().Inverted() );
+ proj.Perform( tgtTrsfP );
+ trsfIsOK = ( proj.IsDone() &&
+ proj.NbPoints() > 0 &&
+ proj.LowerDistance() < tol );
+ }
+ if ( !trsfIsOK )
+ return false;
+ }
+
+ // Make new faces
+
+ // prepare the helper to adding quadratic elements if necessary
+ helper->IsQuadraticSubMesh( tgtFace );
+
+ SMESHDS_SubMesh* srcSubDS = srcMeshDS->MeshElements( srcFace );
+ if ( !is1DComputed && srcSubDS->NbElements() )
+ helper->SetIsQuadratic( srcSubDS->GetElements()->next()->IsQuadratic() );
+
+ SMESH_MesherHelper* srcHelper = srcWires[0]->FaceHelper();
+ SMESH_MesherHelper edgeHelper( *tgtMesh );
+ edgeHelper.ToFixNodeParameters( true );
+
+ const SMDS_MeshNode* nullNode = 0;
+ TAssocTool::TNodeNodeMap::iterator srcN_tgtN;
+
+ // indices of nodes to create properly oriented faces
+ bool isReverse = ( !trsf.IsIdentity() );
+ int tri1 = 1, tri2 = 2, quad1 = 1, quad3 = 3;
+ if ( isReverse )
+ std::swap( tri1, tri2 ), std::swap( quad1, quad3 );
+
+ SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
+ vector< const SMDS_MeshNode* > tgtNodes;
+ while ( elemIt->more() ) // loop on all mesh faces on srcFace
+ {
+ const SMDS_MeshElement* elem = elemIt->next();
+ const int nbN = elem->NbCornerNodes();
+ tgtNodes.resize( nbN );
+ helper->SetElementsOnShape( false );
+ for ( int i = 0; i < nbN; ++i ) // loop on nodes of the source element
+ {
+ const SMDS_MeshNode* srcNode = elem->GetNode(i);
+ srcN_tgtN = src2tgtNodes.insert( make_pair( srcNode, nullNode )).first;
+ if ( srcN_tgtN->second == nullNode )
+ {
+ // create a new node
+ gp_Pnt tgtP = trsf.Transform( SMESH_TNodeXYZ( srcNode ));
+ SMDS_MeshNode* n = helper->AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
+ srcN_tgtN->second = n;
+ switch ( srcNode->GetPosition()->GetTypeOfPosition() )
+ {
+ case SMDS_TOP_FACE:
+ {
+ gp_Pnt2d srcUV = srcHelper->GetNodeUV( srcFace, srcNode );
+ tgtMeshDS->SetNodeOnFace( n, helper->GetSubShapeID(), srcUV.X(), srcUV.Y() );
+ break;
+ }
+ case SMDS_TOP_EDGE:
+ {
+ const TopoDS_Edge& srcE = TopoDS::Edge( srcMeshDS->IndexToShape( srcNode->getshapeId()));
+ const TopoDS_Edge& tgtE = TopoDS::Edge( shape2ShapeMap( srcE, /*isSrc=*/true ));
+ double srcU = srcHelper->GetNodeU( srcE, srcNode );
+ tgtMeshDS->SetNodeOnEdge( n, tgtE, srcU );
+ if ( !tgtFace.IsPartner( srcFace ))
+ {
+ edgeHelper.SetSubShape( tgtE );
+ double tol = BRep_Tool::Tolerance( tgtE );
+ bool isOk = edgeHelper.CheckNodeU( tgtE, n, srcU, 2 * tol, /*force=*/true );
+ if ( !isOk ) // projection of n to tgtE failed (23395)
+ {
+ double sF, sL, tF, tL;
+ BRep_Tool::Range( srcE, sF, sL );
+ BRep_Tool::Range( tgtE, tF, tL );
+ double srcR = ( srcU - sF ) / ( sL - sF );
+ double tgtU = tF + srcR * ( tL - tF );
+ tgtMeshDS->SetNodeOnEdge( n, tgtE, tgtU );
+ gp_Pnt newP = BRepAdaptor_Curve( tgtE ).Value( tgtU );
+ double dist = newP.Distance( tgtP );
+ if ( tol < dist && dist < 1000*tol )
+ tgtMeshDS->MoveNode( n, newP.X(), newP.Y(), newP.Z() );
+ }
+ }
+ break;
+ }
+ case SMDS_TOP_VERTEX:
+ {
+ const TopoDS_Shape & srcV = srcMeshDS->IndexToShape( srcNode->getshapeId() );
+ const TopoDS_Shape & tgtV = shape2ShapeMap( srcV, /*isSrc=*/true );
+ tgtMeshDS->SetNodeOnVertex( n, TopoDS::Vertex( tgtV ));
+ break;
+ }
+ default:;
+ }
+ }
+ tgtNodes[i] = srcN_tgtN->second;
+ }
+ // create a new face
+ helper->SetElementsOnShape( true );
+ switch ( nbN )
+ {
+ case 3: helper->AddFace(tgtNodes[0], tgtNodes[tri1], tgtNodes[tri2]); break;
+ case 4: helper->AddFace(tgtNodes[0], tgtNodes[quad1], tgtNodes[2], tgtNodes[quad3]); break;
+ default:
+ if ( isReverse ) std::reverse( tgtNodes.begin(), tgtNodes.end() );
+ helper->AddPolygonalFace( tgtNodes );
+ }
+ }
+
+ // check node positions
+
+ if ( !tgtFace.IsPartner( srcFace ) )
+ {
+ helper->ToFixNodeParameters( true );
+
+ int nbOkPos = 0;
+ const double tol2d = 1e-12;
+ srcN_tgtN = src2tgtNodes.begin();
+ for ( ; srcN_tgtN != src2tgtNodes.end(); ++srcN_tgtN )
+ {
+ const SMDS_MeshNode* n = srcN_tgtN->second;
+ switch ( n->GetPosition()->GetTypeOfPosition() )
+ {
+ case SMDS_TOP_FACE:
+ {
+ if ( nbOkPos > 10 ) break;
+ gp_XY uv = helper->GetNodeUV( tgtFace, n ), uvBis = uv;
+ if (( helper->CheckNodeUV( tgtFace, n, uv, tol )) &&
+ (( uv - uvBis ).SquareModulus() < tol2d ))
+ ++nbOkPos;
+ else
+ nbOkPos = -((int) src2tgtNodes.size() );
+ break;
+ }
+ case SMDS_TOP_EDGE:
+ {
+ // const TopoDS_Edge & tgtE = TopoDS::Edge( tgtMeshDS->IndexToShape( n->getshapeId() ));
+ // edgeHelper.SetSubShape( tgtE );
+ // edgeHelper.GetNodeU( tgtE, n, 0, &toCheck );
+ break;
+ }
+ default:;
+ }
+ }
+ }
+
+ return true;
+
+ } // bool projectPartner()
+
+ //================================================================================
+ /*!
+ * \brief Perform projection in case if the faces are similar in 2D space
+ */
+ //================================================================================
+
+ bool projectBy2DSimilarity(const TopoDS_Face& tgtFace,
+ const TopoDS_Face& srcFace,
+ const TSideVector& tgtWires,
+ const TSideVector& srcWires,
+ const TAssocTool::TShapeShapeMap& shape2ShapeMap,
+ TAssocTool::TNodeNodeMap& src2tgtNodes,
+ const bool is1DComputed)
+ {
+ SMESH_Mesh * tgtMesh = tgtWires[0]->GetMesh();
+ SMESH_Mesh * srcMesh = srcWires[0]->GetMesh();
+
+ // WARNING: we can have problems if the FACE is symmetrical in 2D,
+ // then the projection can be mirrored relating to what is expected
+
+ // 1) Find 2D transformation
+
+ StdMeshers_ProjectionUtils::TrsfFinder2D trsf;
+ {
+ // get 2 pairs of corresponding UVs
+ gp_Pnt2d srcP0 = srcWires[0]->Value2d(0.0);
+ gp_Pnt2d srcP1 = srcWires[0]->Value2d(0.333);
+ gp_Pnt2d tgtP0 = tgtWires[0]->Value2d(0.0);
+ gp_Pnt2d tgtP1 = tgtWires[0]->Value2d(0.333);
+
+ // make transformation
+ gp_Trsf2d fromTgtCS, toSrcCS; // from/to global CS
+ gp_Ax2d srcCS( srcP0, gp_Vec2d( srcP0, srcP1 ));
+ gp_Ax2d tgtCS( tgtP0, gp_Vec2d( tgtP0, tgtP1 ));
+ toSrcCS .SetTransformation( srcCS );
+ fromTgtCS.SetTransformation( tgtCS );
+ fromTgtCS.Invert();
+ trsf.Set( fromTgtCS * toSrcCS );
+
+ // check transformation
+ bool trsfIsOK = true;
+ const double tol = 1e-5 * gp_Vec2d( srcP0, srcP1 ).Magnitude();
+ for ( double u = 0.12; ( u < 1. && trsfIsOK ); u += 0.1 )
+ {
+ gp_Pnt2d srcUV = srcWires[0]->Value2d( u );
+ gp_Pnt2d tgtUV = tgtWires[0]->Value2d( u );
+ gp_Pnt2d tgtUV2 = trsf.Transform( srcUV );
+ trsfIsOK = ( tgtUV.Distance( tgtUV2 ) < tol );
+ }
+
+ // Find trsf using a least-square approximation
+ if ( !trsfIsOK )
+ {
+ // find trsf
+ const int totNbSeg = 50;
+ vector< gp_XY > srcPnts, tgtPnts;
+ srcPnts.reserve( totNbSeg );
+ tgtPnts.reserve( totNbSeg );
+ for ( size_t iW = 0; iW < srcWires.size(); ++iW )
+ {
+ const double minSegLen = srcWires[iW]->Length() / totNbSeg;
+ for ( int iE = 0; iE < srcWires[iW]->NbEdges(); ++iE )
+ {
+ size_t nbSeg = Max( 1, int( srcWires[iW]->EdgeLength( iE ) / minSegLen ));
+ double srcU = srcWires[iW]->FirstParameter( iE );
+ double tgtU = tgtWires[iW]->FirstParameter( iE );
+ double srcDu = ( srcWires[iW]->LastParameter( iE )- srcU ) / nbSeg;
+ double tgtDu = ( tgtWires[iW]->LastParameter( iE )- tgtU ) / nbSeg;
+ for ( size_t i = 0; i < nbSeg; ++i, srcU += srcDu, tgtU += tgtDu )
+ {
+ srcPnts.push_back( srcWires[iW]->Value2d( srcU ).XY() );
+ tgtPnts.push_back( tgtWires[iW]->Value2d( tgtU ).XY() );
+ }
+ }
+ }
+ if ( !trsf.Solve( srcPnts, tgtPnts ))
+ return false;
+
+ // check trsf
+
+ trsfIsOK = true;
+ const int nbTestPnt = 10;
+ const size_t iStep = Max( 1, int( srcPnts.size() / nbTestPnt ));
+ for ( size_t i = 0; ( i < srcPnts.size() && trsfIsOK ); i += iStep )
+ {
+ gp_Pnt2d trsfTgt = trsf.Transform( srcPnts[i] );
+ trsfIsOK = ( trsfTgt.Distance( tgtPnts[i] ) < tol );
+ }
+ if ( !trsfIsOK )
+ return false;
+ }
+ } // "Find transformation" block
+
+ // 2) Projection
+
+ SMESHDS_SubMesh* srcSubDS = srcMesh->GetMeshDS()->MeshElements( srcFace );
+
+ SMESH_MesherHelper* helper = tgtWires[0]->FaceHelper();
+ if ( is1DComputed )
+ helper->IsQuadraticSubMesh( tgtFace );
+ else
+ helper->SetIsQuadratic( srcSubDS->GetElements()->next()->IsQuadratic() );
+ helper->SetElementsOnShape( true );
+ Handle(Geom_Surface) tgtSurface = BRep_Tool::Surface( tgtFace );
+ SMESHDS_Mesh* tgtMeshDS = tgtMesh->GetMeshDS();
+
+ SMESH_MesherHelper* srcHelper = srcWires[0]->FaceHelper();
+
+ const SMDS_MeshNode* nullNode = 0;
+ TAssocTool::TNodeNodeMap::iterator srcN_tgtN;
+
+ SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
+ vector< const SMDS_MeshNode* > tgtNodes;
+ bool uvOK;
+ while ( elemIt->more() ) // loop on all mesh faces on srcFace
+ {
+ const SMDS_MeshElement* elem = elemIt->next();
+ const int nbN = elem->NbCornerNodes();
+ tgtNodes.resize( nbN );
+ for ( int i = 0; i < nbN; ++i ) // loop on nodes of the source element
+ {
+ const SMDS_MeshNode* srcNode = elem->GetNode(i);
+ srcN_tgtN = src2tgtNodes.insert( make_pair( srcNode, nullNode )).first;
+ if ( srcN_tgtN->second == nullNode )
+ {
+ // create a new node
+ gp_Pnt2d srcUV = srcHelper->GetNodeUV( srcFace, srcNode,
+ elem->GetNode( helper->WrapIndex(i+1,nbN)), &uvOK);
+ gp_Pnt2d tgtUV = trsf.Transform( srcUV );
+ gp_Pnt tgtP = tgtSurface->Value( tgtUV.X(), tgtUV.Y() );
+ SMDS_MeshNode* n = tgtMeshDS->AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
+ switch ( srcNode->GetPosition()->GetTypeOfPosition() )
+ {
+ case SMDS_TOP_FACE: {
+ tgtMeshDS->SetNodeOnFace( n, helper->GetSubShapeID(), tgtUV.X(), tgtUV.Y() );
+ break;
+ }
+ case SMDS_TOP_EDGE: {
+ TopoDS_Shape srcEdge = srcHelper->GetSubShapeByNode( srcNode, srcHelper->GetMeshDS() );
+ TopoDS_Edge tgtEdge = TopoDS::Edge( shape2ShapeMap( srcEdge, /*isSrc=*/true ));
+ double U = Precision::Infinite();
+ helper->CheckNodeU( tgtEdge, n, U, Precision::PConfusion());
+ tgtMeshDS->SetNodeOnEdge( n, TopoDS::Edge( tgtEdge ), U );
+ break;
+ }
+ case SMDS_TOP_VERTEX: {
+ TopoDS_Shape srcV = srcHelper->GetSubShapeByNode( srcNode, srcHelper->GetMeshDS() );
+ TopoDS_Shape tgtV = shape2ShapeMap( srcV, /*isSrc=*/true );
+ tgtMeshDS->SetNodeOnVertex( n, TopoDS::Vertex( tgtV ));
+ break;
+ }
+ default:;
+ }
+ srcN_tgtN->second = n;
+ }
+ tgtNodes[i] = srcN_tgtN->second;
+ }
+ // create a new face (with reversed orientation)
+ switch ( nbN )
+ {
+ case 3: helper->AddFace(tgtNodes[0], tgtNodes[2], tgtNodes[1]); break;
+ case 4: helper->AddFace(tgtNodes[0], tgtNodes[3], tgtNodes[2], tgtNodes[1]); break;
+ }
+ } // loop on all mesh faces on srcFace
+
+ return true;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Perform projection in case of quadrilateral faces
+ */
+ //================================================================================
+
+ bool projectQuads(const TopoDS_Face& tgtFace,
+ const TopoDS_Face& srcFace,
+ const TSideVector& tgtWires,
+ const TSideVector& srcWires,
+ const TAssocTool::TShapeShapeMap& shape2ShapeMap,
+ TAssocTool::TNodeNodeMap& src2tgtNodes,
+ const bool is1DComputed)
+ {
+ // SMESH_Mesh * tgtMesh = tgtWires[0]->GetMesh();
+ // SMESH_Mesh * srcMesh = srcWires[0]->GetMesh();
+ // //SMESHDS_Mesh * tgtMeshDS = tgtMesh->GetMeshDS();
+ // SMESHDS_Mesh * srcMeshDS = srcMesh->GetMeshDS();
+
+ // if ( srcWires[0]->NbEdges() != 4 )
+ // return false;
+ // if ( !is1DComputed )
+ // return false;
+ // for ( int iE = 0; iE < 4; ++iE )
+ // {
+ // SMESHDS_SubMesh* sm = srcMeshDS->MeshElements( srcWires[0]->Edge( iE ));
+ // if ( !sm ) return false;
+ // if ( sm->NbNodes() + sm->NbElements() == 0 ) return false;
+ // }
+ // if ( BRepAdaptor_Surface( tgtFace ).GetType() != GeomAbs_Plane )
+ // return false;
+ // // if ( BRepAdaptor_Surface( tgtFace ).GetType() == GeomAbs_Plane &&
+ // // BRepAdaptor_Surface( srcFace ).GetType() == GeomAbs_Plane )
+ // // return false; // too easy
+
+ // // load EDGEs to SMESH_Block
+
+ // SMESH_Block block;
+ // TopTools_IndexedMapOfOrientedShape blockSubShapes;
+ // {
+ // const TopoDS_Solid& box = srcMesh->PseudoShape();
+ // TopoDS_Shell shell = TopoDS::Shell( TopExp_Explorer( box, TopAbs_SHELL ).Current() );
+ // TopoDS_Vertex v;
+ // block.LoadBlockShapes( shell, v, v, blockSubShapes ); // fill all since operator[] is missing
+ // }
+ // const SMESH_Block::TShapeID srcFaceBID = SMESH_Block::ID_Fxy0;
+ // const SMESH_Block::TShapeID tgtFaceBID = SMESH_Block::ID_Fxy1;
+ // vector< int > edgeBID;
+ // block.GetFaceEdgesIDs( srcFaceBID, edgeBID ); // u0, u1, 0v, 1v
+ // blockSubShapes.Substitute( edgeBID[0], srcWires[0]->Edge(0) );
+ // blockSubShapes.Substitute( edgeBID[1], srcWires[0]->Edge(2) );
+ // blockSubShapes.Substitute( edgeBID[2], srcWires[0]->Edge(3) );
+ // blockSubShapes.Substitute( edgeBID[3], srcWires[0]->Edge(1) );
+ // block.GetFaceEdgesIDs( tgtFaceBID, edgeBID ); // u0, u1, 0v, 1v
+ // blockSubShapes.Substitute( edgeBID[0], tgtWires[0]->Edge(0) );
+ // blockSubShapes.Substitute( edgeBID[1], tgtWires[0]->Edge(2) );
+ // blockSubShapes.Substitute( edgeBID[2], tgtWires[0]->Edge(3) );
+ // blockSubShapes.Substitute( edgeBID[3], tgtWires[0]->Edge(1) );
+ // block.LoadFace( srcFace, srcFaceBID, blockSubShapes );
+ // block.LoadFace( tgtFace, tgtFaceBID, blockSubShapes );
+
+ // // remember connectivity of new faces in terms of ( node-or-XY )
+
+ // typedef std::pair< const SMDS_MeshNode*, gp_XYZ > TNodeOrXY; // node-or-XY
+ // typedef std::vector< TNodeOrXY* > TFaceConn; // face connectivity
+ // std::vector< TFaceConn > newFacesVec; // connectivity of all faces
+ // std::map< const SMDS_MeshNode*, TNodeOrXY > srcNode2tgtNXY; // src node -> node-or-XY
+
+ // TAssocTool::TNodeNodeMap::iterator srcN_tgtN;
+ // std::map< const SMDS_MeshNode*, TNodeOrXY >::iterator srcN_tgtNXY;
+ // std::pair< std::map< const SMDS_MeshNode*, TNodeOrXY >::iterator, bool > n2n_isNew;
+ // TNodeOrXY nullNXY( (SMDS_MeshNode*)NULL, gp_XYZ(0,0,0) );
+
+ // SMESHDS_SubMesh* srcSubDS = srcMeshDS->MeshElements( srcFace );
+ // newFacesVec.resize( srcSubDS->NbElements() );
+ // int iFaceSrc = 0;
+
+ // SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
+ // while ( elemIt->more() ) // loop on all mesh faces on srcFace
+ // {
+ // const SMDS_MeshElement* elem = elemIt->next();
+ // TFaceConn& tgtNodes = newFacesVec[ iFaceSrc++ ];
+
+ // const int nbN = elem->NbCornerNodes();
+ // tgtNodes.resize( nbN );
+ // for ( int i = 0; i < nbN; ++i ) // loop on nodes of the source element
+ // {
+ // const SMDS_MeshNode* srcNode = elem->GetNode(i);
+ // n2n_isNew = srcNode2tgtNXY.insert( make_pair( srcNode, nullNXY ));
+ // TNodeOrXY & tgtNodeOrXY = n2n_isNew.first->second;
+ // if ( n2n_isNew.second ) // new src node encounters
+ // {
+ // srcN_tgtN = src2tgtNodes.find( srcNode );
+ // if ( srcN_tgtN != src2tgtNodes.end() )
+ // {
+ // tgtNodeOrXY.first = srcN_tgtN->second; // tgt node exists
+ // }
+ // else
+ // {
+ // // find XY of src node within the quadrilateral srcFace
+ // if ( !block.ComputeParameters( SMESH_TNodeXYZ( srcNode ),
+ // tgtNodeOrXY.second, srcFaceBID ))
+ // return false;
+ // }
+ // }
+ // tgtNodes[ i ] = & tgtNodeOrXY;
+ // }
+ // }
+
+ // // as all XY are computed, create tgt nodes and faces
+
+ // SMESH_MesherHelper helper = *tgtWires[0]->FaceHelper();
+ // if ( is1DComputed )
+ // helper.IsQuadraticSubMesh( tgtFace );
+ // else
+ // helper.SetIsQuadratic( srcSubDS->GetElements()->next()->IsQuadratic() );
+ // helper.SetElementsOnShape( true );
+ // Handle(Geom_Surface) tgtSurface = BRep_Tool::Surface( tgtFace );
+
+ // SMESH_MesherHelper srcHelper = *srcWires[0]->FaceHelper();
+
+ // vector< const SMDS_MeshNode* > tgtNodes;
+ // gp_XY uv;
+
+ // for ( size_t iFaceTgt = 0; iFaceTgt < newFacesVec.size(); ++iFaceTgt )
+ // {
+ // TFaceConn& tgtConn = newFacesVec[ iFaceTgt ];
+ // tgtNodes.resize( tgtConn.size() );
+ // for ( size_t iN = 0; iN < tgtConn.size(); ++iN )
+ // {
+ // const SMDS_MeshNode* & tgtN = tgtConn[ iN ]->first;
+ // if ( !tgtN ) // create a node
+ // {
+ // if ( !block.FaceUV( tgtFaceBID, tgtConn[iN]->second, uv ))
+ // return false;
+ // gp_Pnt p = tgtSurface->Value( uv.X(), uv.Y() );
+ // tgtN = helper.AddNode( p.X(), p.Y(), p.Z(), uv.X(), uv.Y() );
+ // }
+ // tgtNodes[ tgtNodes.size() - iN - 1] = tgtN; // reversed orientation
+ // }
+ // switch ( tgtNodes.size() )
+ // {
+ // case 3: helper.AddFace(tgtNodes[0], tgtNodes[1], tgtNodes[2]); break;
+ // case 4: helper.AddFace(tgtNodes[0], tgtNodes[1], tgtNodes[2], tgtNodes[3]); break;
+ // default:
+ // if ( tgtNodes.size() > 4 )
+ // helper.AddPolygonalFace( tgtNodes );
+ // }
+ // }
+ return false; //true;
+
+ } // bool projectQuads(...)
+
+ //================================================================================
+ /*!
+ * \brief Fix bad faces by smoothing
+ */
+ //================================================================================
+
+ bool fixDistortedFaces( SMESH_MesherHelper& helper,
+ TSideVector& tgtWires )
+ {
+ SMESH_subMesh* faceSM = helper.GetMesh()->GetSubMesh( helper.GetSubShape() );
+
+ //if ( helper.IsDistorted2D( faceSM, /*checkUV=*/true ))
+ {
+ SMESH_MeshEditor editor( helper.GetMesh() );
+ SMESHDS_SubMesh* smDS = faceSM->GetSubMeshDS();
+ const TopoDS_Face& F = TopoDS::Face( faceSM->GetSubShape() );
+
+ TIDSortedElemSet faces;
+ SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
+ for ( faceIt = smDS->GetElements(); faceIt->more(); )
+ faces.insert( faces.end(), faceIt->next() );
+
+ // choose smoothing algo
+ //SMESH_MeshEditor:: SmoothMethod algo = SMESH_MeshEditor::CENTROIDAL;
+ bool isConcaveBoundary = false;
+ for ( size_t iW = 0; iW < tgtWires.size() && !isConcaveBoundary; ++iW )
+ {
+ TopoDS_Edge prevEdge = tgtWires[iW]->Edge( tgtWires[iW]->NbEdges() - 1 );
+ for ( int iE = 0; iE < tgtWires[iW]->NbEdges() && !isConcaveBoundary; ++iE )
+ {
+ double angle = helper.GetAngle( prevEdge, tgtWires[iW]->Edge( iE ),
+ F, tgtWires[iW]->FirstVertex( iE ));
+ isConcaveBoundary = ( angle < -5. * M_PI / 180. );
+
+ prevEdge = tgtWires[iW]->Edge( iE );
+ }
+ }
+ SMESH_MeshEditor:: SmoothMethod algo =
+ isConcaveBoundary ? SMESH_MeshEditor::CENTROIDAL : SMESH_MeshEditor::LAPLACIAN;
+
+ // smooth in 2D or 3D?
+ TopLoc_Location loc;
+ Handle(Geom_Surface) surface = BRep_Tool::Surface( F, loc );
+ bool isPlanar = GeomLib_IsPlanarSurface( surface ).IsPlanar();
+
+ // smoothing
+ set<const SMDS_MeshNode*> fixedNodes;
+ editor.Smooth( faces, fixedNodes, algo, /*nbIterations=*/ 10,
+ /*theTgtAspectRatio=*/1.0, /*the2D=*/!isPlanar);
+
+ helper.ToFixNodeParameters( true );
+
+ return !helper.IsDistorted2D( faceSM, /*checkUV=*/true );
+ }
+ return true;
+ }
+
+ //=======================================================================
+ /*
+ * Set initial association of VERTEXes for the case of projection
+ * from a quadrangle FACE to a closed FACE, where opposite src EDGEs
+ * have different nb of segments
+ */
+ //=======================================================================
+
+ void initAssoc4Quad2Closed(const TopoDS_Shape& tgtFace,
+ SMESH_MesherHelper& tgtHelper,
+ const TopoDS_Shape& srcFace,
+ SMESH_Mesh* srcMesh,
+ TAssocTool::TShapeShapeMap & assocMap)
+ {
+ if ( !tgtHelper.HasRealSeam() || srcFace.ShapeType() != TopAbs_FACE )
+ return; // no seam edge
+ list< TopoDS_Edge > tgtEdges, srcEdges;
+ list< int > tgtNbEW, srcNbEW;
+ int tgtNbW = SMESH_Block::GetOrderedEdges( TopoDS::Face( tgtFace ), tgtEdges, tgtNbEW );
+ int srcNbW = SMESH_Block::GetOrderedEdges( TopoDS::Face( srcFace ), srcEdges, srcNbEW );
+ if ( tgtNbW != 1 || srcNbW != 1 ||
+ tgtNbEW.front() != 4 || srcNbEW.front() != 4 )
+ return; // not quads
+
+ int srcNbSeg[4];
+ list< TopoDS_Edge >::iterator edgeS = srcEdges.begin(), edgeT = tgtEdges.begin();
+ for ( int i = 0; edgeS != srcEdges.end(); ++i, ++edgeS )
+ if ( SMESHDS_SubMesh* sm = srcMesh->GetMeshDS()->MeshElements( *edgeS ))
+ srcNbSeg[ i ] = sm->NbNodes();
+ else
+ return; // not meshed
+ if ( srcNbSeg[0] == srcNbSeg[2] && srcNbSeg[1] == srcNbSeg[3] )
+ return; // same nb segments
+ if ( srcNbSeg[0] != srcNbSeg[2] && srcNbSeg[1] != srcNbSeg[3] )
+ return; // all different nb segments
+
+ edgeS = srcEdges.begin();
+ if ( srcNbSeg[0] != srcNbSeg[2] )
+ ++edgeS;
+ TAssocTool::InsertAssociation( tgtHelper.IthVertex( 0,*edgeT ),
+ tgtHelper.IthVertex( 0,*edgeS ), assocMap );
+ TAssocTool::InsertAssociation( tgtHelper.IthVertex( 1,*edgeT ),
+ tgtHelper.IthVertex( 1,*edgeS ), assocMap );
+ }
+