X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=src%2FStdMeshers%2FStdMeshers_CompositeHexa_3D.cxx;h=6edbf2b85f4749bc80ddd8b501ff52319c9659fa;hb=293c27e2776ccfd02c8bda9df0520405267308d7;hp=30b645a622793de22e636862ba28688f23e51168;hpb=42491f3cb5447af200a225c414ff12be011afdfc;p=modules%2Fsmesh.git diff --git a/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx b/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx index 30b645a62..6edbf2b85 100644 --- a/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx +++ b/src/StdMeshers/StdMeshers_CompositeHexa_3D.cxx @@ -1,9 +1,9 @@ -// Copyright (C) 2007-2013 CEA/DEN, EDF R&D, OPEN CASCADE +// Copyright (C) 2007-2015 CEA/DEN, EDF R&D, OPEN CASCADE // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public // License as published by the Free Software Foundation; either -// version 2.1 of the License. +// version 2.1 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -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; @@ -145,10 +147,10 @@ public: public: //** Methods to find and orient faces of 6 sides of the box **// //!< initialization - bool Init(const TopoDS_Face& f); + bool Init(const TopoDS_Face& f, SMESH_Mesh& mesh ); //!< try to unite self with other face - bool AddContinuousFace( const _QuadFaceGrid& f ); + 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); @@ -276,6 +278,175 @@ bool StdMeshers_CompositeHexa_3D::CheckHypothesis(SMESH_Mesh& aMesh, return true; } +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 at block corners + */ + //================================================================================ + + void getBlockCorners( SMESH_Mesh& mesh, + const TopoDS_Shape& shape, + TopTools_MapOfShape& cornerVV) + { + set faceIDs; // ids of FACEs in the shape + TopExp_Explorer exp; + for ( exp.Init( shape, TopAbs_FACE ); exp.More(); exp.Next() ) + faceIDs.insert( mesh.GetMeshDS()->ShapeToIndex( exp.Current() )); + + TopTools_MapOfShape checkedVV; + for ( exp.Init( shape, TopAbs_VERTEX ); exp.More(); exp.Next() ) + { + TopoDS_Vertex V = TopoDS::Vertex( exp.Current() ); + if ( !checkedVV.Add( V )) continue; + + const SMDS_MeshNode* n = SMESH_Algo::VertexNode( V, mesh.GetMeshDS() ); + if ( !n ) continue; + + int nbQuads = 0; + SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator(SMDSAbs_Face); + while ( fIt->more() ) + { + const SMDS_MeshElement* f = fIt->next(); + if ( !faceIDs.count( f->getshapeId() )) continue; + + if ( f->NbCornerNodes() == 4 ) + ++nbQuads; + else + nbQuads = 100; + } + if ( nbQuads == 3 ) + 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/*, ridgeEE*/; + TopTools_MapIteratorOfMapOfShape vIt( cornerVV ); + for ( ; vIt.More(); vIt.Next() ) + { + TopoDS_Shape V0 = vIt.Key(); + // walk from one corner VERTEX to another along ridge EDGEs + 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 both 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 ending at V1 + 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 ) && subEE.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 + //================================================================================ /*! * \brief Tries to find 6 sides of a box @@ -284,6 +455,7 @@ bool StdMeshers_CompositeHexa_3D::CheckHypothesis(SMESH_Mesh& aMesh, bool StdMeshers_CompositeHexa_3D::findBoxFaces( const TopoDS_Shape& shape, list< _QuadFaceGrid >& boxFaces, + SMESH_Mesh& mesh, _QuadFaceGrid * & fBottom, _QuadFaceGrid * & fTop, _QuadFaceGrid * & fFront, @@ -291,27 +463,35 @@ bool StdMeshers_CompositeHexa_3D::findBoxFaces( const TopoDS_Shape& shape, _QuadFaceGrid * & fLeft, _QuadFaceGrid * & fRight) { + TopTools_MapOfShape cornerVertices; + getBlockCorners( mesh, shape, cornerVertices ); + if ( cornerVertices.Extent() != 8 ) + return error( COMPERR_BAD_INPUT_MESH, "Can't find 8 corners of a block by 2D mesh" ); + 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; int nbFaces = 0; - for ( exp.Init( shape, TopAbs_FACE); exp.More(); exp.Next(), ++nbFaces ) + for ( exp.Init( shape, TopAbs_FACE ); exp.More(); exp.Next(), ++nbFaces ) { _QuadFaceGrid f; - if ( !f.Init( TopoDS::Face( exp.Current() ))) + if ( !f.Init( TopoDS::Face( exp.Current() ), mesh )) return error (COMPERR_BAD_SHAPE); - _QuadFaceGrid* prevContinuous = 0; + _QuadFaceGrid* prevContinuous = 0; for ( boxFace = boxFaces.begin(); boxFace != boxFaces.end(); ++boxFace ) { if ( prevContinuous ) { - if ( prevContinuous->AddContinuousFace( *boxFace )) + if ( prevContinuous->AddContinuousFace( *boxFace, internalEdges )) boxFace = --boxFaces.erase( boxFace ); } - else if ( boxFace->AddContinuousFace( f )) + else if ( boxFace->AddContinuousFace( f, internalEdges )) { prevContinuous = & (*boxFace); - } + } } if ( !prevContinuous ) boxFaces.push_back( f ); @@ -326,7 +506,7 @@ bool StdMeshers_CompositeHexa_3D::findBoxFaces( const TopoDS_Shape& shape, boxFaces.resize( 6 ); boxFace = boxFaces.begin(); for ( exp.Init( shape, TopAbs_FACE); exp.More(); exp.Next(), ++boxFace ) - boxFace->Init( TopoDS::Face( exp.Current() ) ); + boxFace->Init( TopoDS::Face( exp.Current() ), mesh ); } // ---------------------------------------- // Find out position of faces within a box @@ -396,7 +576,7 @@ bool StdMeshers_CompositeHexa_3D::Compute(SMESH_Mesh& theMesh, // ------------------------- list< _QuadFaceGrid > boxFaceContainer; _QuadFaceGrid *fBottom, *fTop, *fFront, *fBack, *fLeft, *fRight; - if ( ! findBoxFaces( theShape, boxFaceContainer, + if ( ! findBoxFaces( theShape, boxFaceContainer, theMesh, fBottom, fTop, fFront, fBack, fLeft, fRight)) return false; @@ -559,7 +739,7 @@ bool StdMeshers_CompositeHexa_3D::Evaluate(SMESH_Mesh& theMesh, // ------------------------- list< _QuadFaceGrid > boxFaceContainer; _QuadFaceGrid *fBottom, *fTop, *fFront, *fBack, *fLeft, *fRight; - if ( ! findBoxFaces( theShape, boxFaceContainer, + if ( ! findBoxFaces( theShape, boxFaceContainer, theMesh, fBottom, fTop, fFront, fBack, fLeft, fRight)) return false; @@ -645,7 +825,7 @@ _QuadFaceGrid::_QuadFaceGrid(): */ //================================================================================ -bool _QuadFaceGrid::Init(const TopoDS_Face& f) +bool _QuadFaceGrid::Init(const TopoDS_Face& f, SMESH_Mesh& mesh) { myFace = f; mySides = _FaceSide(); @@ -680,6 +860,12 @@ bool _QuadFaceGrid::Init(const TopoDS_Face& f) else if ( SMESH_Algo::IsContinuous( sideEdges.front(), edges.back() )) { sideEdges.splice( sideEdges.begin(), edges, --edges.end()); } + else if ( isContinuousMesh( sideEdges.back(), edges.front(), f, mesh )) { + sideEdges.splice( sideEdges.end(), edges, edges.begin()); + } + else if ( isContinuousMesh( sideEdges.front(), edges.back(), f, mesh )) { + sideEdges.splice( sideEdges.begin(), edges, --edges.end()); + } else { break; } @@ -706,30 +892,17 @@ bool _QuadFaceGrid::Init(const TopoDS_Face& f) */ //================================================================================ -bool _QuadFaceGrid::AddContinuousFace( const _QuadFaceGrid& other ) +bool _QuadFaceGrid::AddContinuousFace( const _QuadFaceGrid& other, + 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 ) + if ( mySides.Contain( otherSide, &iMyCommon ) ) + { + if ( internalEdges.Contains( otherSide.Edge( 0 ))) { - 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 DUMP_VERT("Cont 1", mySides.GetSide(iMyCommon)->FirstVertex()); DUMP_VERT("Cont 2", mySides.GetSide(iMyCommon)->LastVertex()); DUMP_VERT("Cont 3", otherSide.FirstVertex()); @@ -1471,9 +1644,24 @@ 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