// Copyright (C) 2005 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN, // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS // // 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. // // This library is distributed in the hope that it will be useful // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com // // File: SMESH_MesherHelper.hxx // Created: 15.02.06 14:48:09 // Author: Sergey KUUL #ifndef SMESH_MesherHelper_HeaderFile #define SMESH_MesherHelper_HeaderFile #include "SMESH_SMESH.hxx" #include #include #include #include #include #include #include typedef pair NLink; typedef map NLinkNodeMap; typedef map::iterator ItNLinkNode; /*! * \brief It helps meshers to add elements * * It allow meshers not to care about creation of medium nodes * when filling a quadratic mesh. Helper does it itself. * It defines degree of elements to create when IsQuadraticSubMesh() * is called. */ typedef std::vector TNodeColumn; typedef std::map< double, TNodeColumn > TParam2ColumnMap; class SMESH_EXPORT SMESH_MesherHelper { public: // ---------- PUBLIC UTILITIES ---------- /*! * \brief Returns true if given node is medium * \param n - node to check * \param typeToCheck - type of elements containing the node to ask about node status * \retval bool - check result */ static bool IsMedium(const SMDS_MeshNode* node, const SMDSAbs_ElementType typeToCheck = SMDSAbs_All); /*! * \brief Load nodes bound to face into a map of node columns * \param theParam2ColumnMap - map of node columns to fill * \param theFace - the face on which nodes are searched for * \param theBaseEdge - the edge nodes of which are columns' bases * \param theMesh - the mesh containing nodes * \retval bool - false if something is wrong * * The key of the map is a normalized parameter of each * base node on theBaseEdge. * This method works in supposition that nodes on the face * forms a rectangular grid and elements can be quardrangles or triangles */ static bool LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap, const TopoDS_Face& theFace, const TopoDS_Edge& theBaseEdge, SMESHDS_Mesh* theMesh); /*! * \brief Return support shape of a node * \param node - the node * \param meshDS - mesh DS * \retval TopoDS_Shape - found support shape */ static const TopoDS_Shape& GetSubShapeByNode(const SMDS_MeshNode* node, SMESHDS_Mesh* meshDS) { return meshDS->IndexToShape( node->GetPosition()->GetShapeId() ); } /*! * \brief Return a valid node index, fixing the given one if necessary * \param ind - node index * \param nbNodes - total nb of nodes * \retval int - valid node index */ static int WrapIndex(const int ind, const int nbNodes) { if ( ind < 0 ) return nbNodes + ind % nbNodes; if ( ind >= nbNodes ) return ind % nbNodes; return ind; } public: // ---------- PUBLIC INSTANCE METHODS ---------- // constructor SMESH_MesherHelper(SMESH_Mesh& theMesh); SMESH_Mesh* GetMesh() const { return myMesh; } SMESHDS_Mesh* GetMeshDS() const { return GetMesh()->GetMeshDS(); } /*! * Check submesh for given shape: if all elements on this shape are quadratic, * quadratic elements will be created. Also fill myNLinkNodeMap */ bool IsQuadraticSubMesh(const TopoDS_Shape& theShape); /*! * \brief Set order of elements to create without calling IsQuadraticSubMesh() */ void SetIsQuadratic(const bool theBuildQuadratic) { myCreateQuadratic = theBuildQuadratic; } /*! * \brief Return myCreateQuadratic flag */ bool GetIsQuadratic() const { return myCreateQuadratic; } /*! * \brief To set created elements on the shape set by IsQuadraticSubMesh() * or the next methods. By defaul elements are set on the shape if * a mesh has no shape to be meshed */ void SetElementsOnShape(bool toSet) { mySetElemOnShape = toSet; } /*! * \brief Set shape to make elements on without calling IsQuadraticSubMesh() */ void SetSubShape(const int subShapeID);//!==SMESHDS_Mesh::ShapeToIndex(shape) void SetSubShape(const TopoDS_Shape& subShape); /*! * \brief Return ID of the shape set by IsQuadraticSubMesh() or SetSubShape() * \retval int - shape index in SMESHDS */ int GetSubShapeID() const { return myShapeID; } /*! * \brief Return the shape set by IsQuadraticSubMesh() or SetSubShape() */ TopoDS_Shape GetSubShape() const { return myShape; } /*! * Creates a node */ SMDS_MeshNode* AddNode(double x, double y, double z, int ID = 0); /*! * Creates quadratic or linear edge */ SMDS_MeshEdge* AddEdge(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const int id = 0, const bool force3d = true); /*! * Creates quadratic or linear triangle */ SMDS_MeshFace* AddFace(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* n3, const int id=0, const bool force3d = false); /*! * Creates quadratic or linear quadrangle */ SMDS_MeshFace* AddFace(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* n3, const SMDS_MeshNode* n4, const int id = 0, const bool force3d = false); /*! * Creates quadratic or linear tetraahedron */ SMDS_MeshVolume* AddVolume(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* n3, const SMDS_MeshNode* n4, const int id = 0, const bool force3d = true); /*! * Creates quadratic or linear pyramid */ SMDS_MeshVolume* AddVolume(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* n3, const SMDS_MeshNode* n4, const SMDS_MeshNode* n5, const int id = 0, const bool force3d = true); /*! * Creates quadratic or linear pentahedron */ SMDS_MeshVolume* AddVolume(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* n3, const SMDS_MeshNode* n4, const SMDS_MeshNode* n5, const SMDS_MeshNode* n6, const int id = 0, const bool force3d = true); /*! * Creates quadratic or linear hexahedron */ SMDS_MeshVolume* AddVolume(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* n3, const SMDS_MeshNode* n4, const SMDS_MeshNode* n5, const SMDS_MeshNode* n6, const SMDS_MeshNode* n7, const SMDS_MeshNode* n8, const int id = 0, bool force3d = true); /*! * \brief Return U of the given node on the edge */ double GetNodeU(const TopoDS_Edge& theEdge, const SMDS_MeshNode* theNode); /*! * \brief Return node UV on face * \param inFaceNode - a node of element being created located inside a face */ gp_XY GetNodeUV(const TopoDS_Face& F, const SMDS_MeshNode* n, const SMDS_MeshNode* inFaceNode=0) const; /*! * \brief Check if inFaceNode argument is necessary for call GetNodeUV(F,..) * \retval bool - return true if the face is periodic * * if F is Null, answer about subshape set through IsQuadraticSubMesh() or * SetSubShape() */ bool GetNodeUVneedInFaceNode(const TopoDS_Face& F = TopoDS_Face()) const; /*! * \brief Check if shape is a degenerated edge or it's vertex * \param subShape - edge or vertex index in SMESHDS * \retval bool - true if subShape is a degenerated shape * * It works only if IsQuadraticSubMesh() or SetSubShape() has been called */ bool IsDegenShape(const int subShape) const { return myDegenShapeIds.find( subShape ) != myDegenShapeIds.end(); } /*! * \brief Check if shape is a seam edge or it's vertex * \param subShape - edge or vertex index in SMESHDS * \retval bool - true if subShape is a seam shape * * It works only if IsQuadraticSubMesh() or SetSubShape() has been called */ bool IsSeamShape(const int subShape) const { return mySeamShapeIds.find( subShape ) != mySeamShapeIds.end(); } /*! * \brief Check if shape is a seam edge or it's vertex * \param subShape - edge or vertex * \retval bool - true if subShape is a seam shape * * It works only if IsQuadraticSubMesh() or SetSubShape() has been called */ bool IsSeamShape(const TopoDS_Shape& subShape) const { return IsSeamShape( GetMeshDS()->ShapeToIndex( subShape )); } /*! * \brief Check if the shape set through IsQuadraticSubMesh() or SetSubShape() * has a seam edge * \retval bool - true if it has */ bool HasSeam() const { return !mySeamShapeIds.empty(); } /*! * \brief Return index of periodic parametric direction of a closed face * \retval int - 1 for U, 2 for V direction */ int GetPeriodicIndex() const { return myParIndex; } /** * Special function for search or creation medium node */ const SMDS_MeshNode* GetMediumNode(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const bool force3d); /*! * Auxilary function for filling myNLinkNodeMap */ void AddNLinkNode(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* n12); /** * Auxilary function for filling myNLinkNodeMap */ void AddNLinkNodeMap(const NLinkNodeMap& aMap) { myNLinkNodeMap.insert(aMap.begin(), aMap.end()); } /** * Returns myNLinkNodeMap */ const NLinkNodeMap& GetNLinkNodeMap() const { return myNLinkNodeMap; } /** * Check mesh without geometry for: if all elements on this shape are quadratic, * quadratic elements will be created. * Used then generated 3D mesh without geometry. */ enum MType{ LINEAR, QUADRATIC, COMP }; MType IsQuadraticMesh(); protected: /*! * \brief Select UV on either of 2 pcurves of a seam edge, closest to the given UV * \param uv1 - UV on the seam * \param uv2 - UV within a face * \retval gp_Pnt2d - selected UV */ gp_Pnt2d GetUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const; private: // Forbiden copy constructor SMESH_MesherHelper (const SMESH_MesherHelper& theOther) {}; // special map for using during creation of quadratic elements NLinkNodeMap myNLinkNodeMap; std::set< int > myDegenShapeIds; std::set< int > mySeamShapeIds; double myPar1, myPar2; // bounds of a closed periodic surface int myParIndex; // bounds' index (1-U, 2-V) TopoDS_Shape myShape; SMESH_Mesh* myMesh; int myShapeID; // to create quadratic elements bool myCreateQuadratic; bool mySetElemOnShape; }; #endif