X-Git-Url: http://git.salome-platform.org/gitweb/?p=modules%2Fsmesh.git;a=blobdiff_plain;f=src%2FStdMeshers%2FStdMeshers_CompositeHexa_3D.cxx;h=f3b76232c4bf961d46ea3e5bba3aa0d2aeb836c2;hp=595aff2d9bf24c4a0bee6a3b584aaa11bfc14960;hb=0460bb60e03d87ed5c65071477c79cc7d2884db3;hpb=b52b396dce1f33b2dad55ec91bb896e768d4b0ec diff --git a/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx b/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx index 595aff2d9..f3b76232c 100644 --- a/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx +++ b/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx @@ -41,6 +41,7 @@ #include #include #include +#include #include #include #include @@ -105,6 +106,7 @@ public: const _FaceSide* GetSide(const int i) const; int size() const { return myChildren.size(); } int NbVertices() const; + int NbCommonVertices( const TopTools_MapOfShape& VV ) const; TopoDS_Vertex FirstVertex() const; TopoDS_Vertex LastVertex() const; TopoDS_Vertex Vertex(int i) const; @@ -148,7 +150,7 @@ public: //** Methods to find and orient faces of 6 sides of the box **// bool Init(const TopoDS_Face& f, SMESH_Mesh& mesh ); //!< try to unite self with other face - bool AddContinuousFace( const _QuadFaceGrid& f, const TopTools_MapOfShape& cornerVertices ); + bool AddContinuousFace( const _QuadFaceGrid& f, const TopTools_MapOfShape& internalEdges ); //!< Try to set the side as bottom hirizontal side bool SetBottomSide(const _FaceSide& side, int* sideIndex=0); @@ -219,10 +221,6 @@ private: bool error(const SMESH_ComputeErrorPtr& err) { myError = err; return ( !myError || myError->IsOK() ); } - bool isContinuousMesh(TopoDS_Edge E1, TopoDS_Edge E2, SMESH_Mesh& mesh) const; - - bool needContinuationAtSide( int iSide, const TopTools_MapOfShape& cornerVertices ) const; - bool loadCompositeGrid(SMESH_Mesh& mesh); bool fillGrid(SMESH_Mesh& theMesh, @@ -282,9 +280,51 @@ bool StdMeshers_CompositeHexa_3D::CheckHypothesis(SMESH_Mesh& aMesh, namespace { + + //================================================================================ + /*! + * \brief Checks structure of a quadrangular mesh at the common VERTEX of two EDGEs. + * Returns true if there are two quadrangles near the VERTEX. + */ + //================================================================================ + + bool isContinuousMesh(TopoDS_Edge E1, + TopoDS_Edge E2, + const TopoDS_Face& F, + const SMESH_Mesh& mesh) + { + if (E1.Orientation() > TopAbs_REVERSED) // INTERNAL + E1.Orientation( TopAbs_FORWARD ); + if (E2.Orientation() > TopAbs_REVERSED) // INTERNAL + E2.Orientation( TopAbs_FORWARD ); + + TopoDS_Vertex V; + if ( !TopExp::CommonVertex( E1, E2, V )) return false; + + const SMDS_MeshNode* n = SMESH_Algo::VertexNode( V, mesh.GetMeshDS() ); + if ( !n ) return false; + + SMESHDS_SubMesh* sm = mesh.GetSubMeshContaining( F )->GetSubMeshDS(); + if ( !sm ) return false; + + int nbQuads = 0; + SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator(SMDSAbs_Face); + while ( fIt->more() ) + { + const SMDS_MeshElement* f = fIt->next(); + if ( !sm->Contains( f )) continue; + + if ( f->NbCornerNodes() == 4 ) + ++nbQuads; + else + return false; + } + return nbQuads == 2; + } + //================================================================================ /*! - * \brief Finds VERTEXes located and block corners + * \brief Finds VERTEXes located at block corners */ //================================================================================ @@ -322,7 +362,89 @@ namespace cornerVV.Add( V ); } } -} + + //================================================================================ + /*! + * \brief Return EDGEs dividing one box side + */ + //================================================================================ + + bool getInternalEdges( SMESH_Mesh& mesh, + const TopoDS_Shape& shape, + const TopTools_MapOfShape& cornerVV, + TopTools_MapOfShape& internEE) + { + TopTools_IndexedMapOfShape subEE, subFF; + TopExp::MapShapes( shape, TopAbs_EDGE, subEE ); + TopExp::MapShapes( shape, TopAbs_FACE, subFF ); + + TopoDS_Vertex VV[2]; + TopTools_MapOfShape subChecked; + TopTools_MapIteratorOfMapOfShape vIt( cornerVV ); + for ( ; vIt.More(); vIt.Next() ) + { + TopoDS_Shape V0 = vIt.Key(); + PShapeIteratorPtr riIt = SMESH_MesherHelper::GetAncestors( V0, mesh, TopAbs_EDGE ); + while ( const TopoDS_Shape* riE = riIt->next() ) + { + if ( !subEE.Contains( *riE ) || !subChecked.Add( *riE )) + continue; + TopoDS_Edge ridgeE = TopoDS::Edge( *riE ); + while ( !ridgeE.IsNull() ) + { + TopExp::Vertices( ridgeE, VV[0], VV[1] ); + TopoDS_Shape V1 = VV[ V0.IsSame( VV[0] )]; + if ( cornerVV.Contains( V1 ) ) + break; // ridgeE reached a corner VERTEX + + // detect internal EDGEs among those sharing V1. There can be 2, 3 or 4 EDGEs and + // number of internal EDGEs is N-2 + TopoDS_Shape nextRidgeE; + PShapeIteratorPtr eIt = SMESH_MesherHelper::GetAncestors( V1, mesh, TopAbs_EDGE ); + while ( const TopoDS_Shape* E = eIt->next() ) + { + if ( E->IsSame( ridgeE ) || !subEE.Contains( *E ) || !subChecked.Add( *E )) + continue; + // look for FACEs sharing E and ridgeE + PShapeIteratorPtr fIt = SMESH_MesherHelper::GetAncestors( *E, mesh, TopAbs_FACE ); + while ( const TopoDS_Shape* F = fIt->next() ) + { + if ( !SMESH_MesherHelper::IsSubShape( ridgeE, *F )) + continue; + if ( isContinuousMesh( ridgeE, TopoDS::Edge( *E ), TopoDS::Face( *F ), mesh )) + { + nextRidgeE = *E; + } + else + { + internEE.Add( *E ); + } + break; + } + } + // look for the next ridge EDGE + if ( nextRidgeE.IsNull() ) + { + eIt = SMESH_MesherHelper::GetAncestors( V1, mesh, TopAbs_EDGE ); + while ( const TopoDS_Shape* E = eIt->next() ) + if ( !ridgeE.IsSame( *E ) && !internEE.Contains( *E ) ) + { + nextRidgeE = *E; + break; + } + } + ridgeE = TopoDS::Edge( nextRidgeE ); + V0 = V1; + + if ( ridgeE.IsNull() ) + return false; + } // check EDGEs around the last VERTEX of ridgeE + } // loop on ridge EDGEs around a corner VERTEX + } // loop on on corner VERTEXes + + return true; + } // getInternalEdges() +} // namespace //================================================================================ /*! @@ -343,7 +465,10 @@ bool StdMeshers_CompositeHexa_3D::findBoxFaces( const TopoDS_Shape& shape, TopTools_MapOfShape cornerVertices; getBlockCorners( mesh, shape, cornerVertices ); if ( cornerVertices.Extent() != 8 ) - return false; + return error( COMPERR_BAD_INPUT_MESH, "Can't find 8 corners of a block" ); + TopTools_MapOfShape internalEdges; + if ( !getInternalEdges( mesh, shape, cornerVertices, internalEdges )) + return error( COMPERR_BAD_INPUT_MESH, "2D mesh is not suitable for i,j,k hexa meshing" ); list< _QuadFaceGrid >::iterator boxFace; TopExp_Explorer exp; @@ -359,10 +484,10 @@ bool StdMeshers_CompositeHexa_3D::findBoxFaces( const TopoDS_Shape& shape, { if ( prevContinuous ) { - if ( prevContinuous->AddContinuousFace( *boxFace, cornerVertices )) + if ( prevContinuous->AddContinuousFace( *boxFace, internalEdges )) boxFace = --boxFaces.erase( boxFace ); } - else if ( boxFace->AddContinuousFace( f, cornerVertices )) + else if ( boxFace->AddContinuousFace( f, internalEdges )) { prevContinuous = & (*boxFace); } @@ -734,10 +859,10 @@ bool _QuadFaceGrid::Init(const TopoDS_Face& f, SMESH_Mesh& mesh) else if ( SMESH_Algo::IsContinuous( sideEdges.front(), edges.back() )) { sideEdges.splice( sideEdges.begin(), edges, --edges.end()); } - else if ( isContinuousMesh( sideEdges.back(), edges.front(), mesh )) { + else if ( isContinuousMesh( sideEdges.back(), edges.front(), f, mesh )) { sideEdges.splice( sideEdges.end(), edges, edges.begin()); } - else if ( isContinuousMesh( sideEdges.front(), edges.back(), mesh )) { + else if ( isContinuousMesh( sideEdges.front(), edges.back(), f, mesh )) { sideEdges.splice( sideEdges.begin(), edges, --edges.end()); } else { @@ -767,32 +892,15 @@ bool _QuadFaceGrid::Init(const TopoDS_Face& f, SMESH_Mesh& mesh) //================================================================================ bool _QuadFaceGrid::AddContinuousFace( const _QuadFaceGrid& other, - const TopTools_MapOfShape& cornerVertices) + const TopTools_MapOfShape& internalEdges) { for ( int i = 0; i < 4; ++i ) { const _FaceSide& otherSide = other.GetSide( i ); int iMyCommon; - if ( mySides.Contain( otherSide, &iMyCommon ) ) { - // check if normals of two faces are collinear at all vertices of an otherSide - const double angleTol = M_PI / 180. / 2.; - int iV, nbV = otherSide.NbVertices(), nbCollinear = 0; - for ( iV = 0; iV < nbV; ++iV ) - { - TopoDS_Vertex v = otherSide.Vertex( iV ); - gp_Vec n1, n2; - if ( !GetNormal( v, n1 ) || !other.GetNormal( v, n2 )) - continue; - if ( n1 * n2 < 0 ) - n1.Reverse(); - if ( n1.Angle(n2) < angleTol ) - nbCollinear++; - else - break; - } - if ( nbCollinear > 1 || // this face becomes composite if not yet is - needContinuationAtSide( iMyCommon, cornerVertices) || - other.needContinuationAtSide( i, cornerVertices )) + if ( mySides.Contain( otherSide, &iMyCommon ) ) + { + if ( internalEdges.Contains( otherSide.Edge( 0 ))) { DUMP_VERT("Cont 1", mySides.GetSide(iMyCommon)->FirstVertex()); DUMP_VERT("Cont 2", mySides.GetSide(iMyCommon)->LastVertex()); @@ -1124,76 +1232,6 @@ bool _QuadFaceGrid::locateChildren() return true; } -//================================================================================ -/*! - * \brief Checks structure of a quadrangular mesh at the common VERTEX of two EDGEs. - * Returns true if there are two quadrangles near the VERTEX. - */ -//================================================================================ - -bool _QuadFaceGrid::isContinuousMesh(TopoDS_Edge E1, TopoDS_Edge E2, SMESH_Mesh& mesh) const -{ - if (E1.Orientation() > TopAbs_REVERSED) // INTERNAL - E1.Orientation( TopAbs_FORWARD ); - if (E2.Orientation() > TopAbs_REVERSED) // INTERNAL - E2.Orientation( TopAbs_FORWARD ); - - TopoDS_Vertex V; - if ( !TopExp::CommonVertex( E1, E2, V )) return false; - - const SMDS_MeshNode* n = SMESH_Algo::VertexNode( V, mesh.GetMeshDS() ); - if ( !n ) return false; - - SMESHDS_SubMesh* sm = mesh.GetSubMesh( myFace )->GetSubMeshDS(); - if ( !sm ) return false; - - int nbQuads = 0; - SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator(SMDSAbs_Face); - while ( fIt->more() ) - { - const SMDS_MeshElement* f = fIt->next(); - if ( !sm->Contains( f )) continue; - - if ( f->NbCornerNodes() == 4 ) - ++nbQuads; - else - return false; - } - return nbQuads == 2; -} - -//================================================================================ -/*! - * \brief Checks if a continuation FACE is needed at a given side according to - * presence of corner VERTEXes - */ -//================================================================================ - -bool _QuadFaceGrid::needContinuationAtSide( int iSide, - const TopTools_MapOfShape& cornerVertices ) const -{ - if ( cornerVertices.empty() ) - return false; - - // check presence of corners at iSide - int nbCorners = 0; - const _FaceSide* side = mySides.GetSide( iSide ); - if ( !side ) return false; - int iV, nbV = side->NbVertices(); - for ( iV = 0; iV < nbV && nbCorners == 0; ++iV ) - nbCorners += cornerVertices.Contains( side->Vertex( iV )); - if ( nbCorners > 0 ) - return false; - - // check presence of corners at other sides - nbCorners = 0; - nbV = mySides.NbVertices(); - for ( iV = 0; iV < nbV && nbCorners == 0; ++iV ) - nbCorners += cornerVertices.Contains( mySides.Vertex( iV )); - - return ( nbCorners > 0 ); // if nbCorners == 2 additional check is needed!!! -} - //================================================================================ /*! * \brief Fill myGrid with nodes of patches @@ -1605,9 +1643,24 @@ int _FaceSide::NbVertices() const return myNbChildren + 1; } +//======================================================================= +//function : NbCommonVertices +//purpose : Returns number of my vertices common with the given ones +//======================================================================= + +int _FaceSide::NbCommonVertices( const TopTools_MapOfShape& VV ) const +{ + int nbCommon = 0; + TopTools_MapIteratorOfMapOfShape vIt ( myVertices ); + for ( ; vIt.More(); vIt.Next() ) + nbCommon += ( VV.Contains( vIt.Key() )); + + return nbCommon; +} + //======================================================================= //function : FirstVertex -//purpose : +//purpose : //======================================================================= TopoDS_Vertex _FaceSide::FirstVertex() const