+ // Implemented in ./SMESH_FreeBorders.cxx
+
+ /*!
+ * Returns all or only closed TFreeBorder's.
+ * Optionally check if the mesh is manifold and if faces are correctly oriented.
+ */
+ SMESHUtils_EXPORT
+ void FindFreeBorders(SMDS_Mesh& mesh,
+ TFreeBorderVec & foundFreeBordes,
+ const bool closedOnly,
+ bool* isManifold = 0,
+ bool* isGoodOri = 0);
+ // Implemented in ./SMESH_FreeBorders.cxx
+
+ /*!
+ * Fill a hole defined by a TFreeBorder with 2D elements.
+ */
+ SMESHUtils_EXPORT
+ void FillHole(const TFreeBorder & freeBorder,
+ SMDS_Mesh& mesh,
+ std::vector<const SMDS_MeshElement*>& newFaces);
+ // Implemented in ./SMESH_FillHole.cxx
+
+ /*!
+ * \brief Find nodes whose merge makes the element invalid
+ */
+ SMESHUtils_EXPORT
+ void DeMerge(const SMDS_MeshElement* elem,
+ std::vector< const SMDS_MeshNode* >& newNodes,
+ std::vector< const SMDS_MeshNode* >& noMergeNodes);
+ // Implemented in SMESH_DeMerge.cxx
+
+
+ typedef std::vector< std::pair< const SMDS_MeshElement*, int > > TElemIntPairVec;
+ typedef std::vector< std::pair< const SMDS_MeshNode*, int > > TNodeIntPairVec;
+ /*!
+ * \brief Create an offset mesh of given faces
+ * \param [in] faceIt - the input faces
+ * \param [in] theFixIntersections - to fix self intersections of the offset mesh or not
+ * \param [out] new2OldFaces - history of faces
+ * \param [out] new2OldNodes - history of nodes
+ * \return SMDS_Mesh* - the new offset mesh, a caller should delete
+ */
+ SMESHUtils_EXPORT
+ SMDS_Mesh* MakeOffset( SMDS_ElemIteratorPtr faceIt,
+ SMDS_Mesh& mesh,
+ const double offset,
+ const bool theFixIntersections,
+ TElemIntPairVec& new2OldFaces,
+ TNodeIntPairVec& new2OldNodes );
+ // Implemented in ./SMESH_Offset.cxx
+
+
+ //=======================================================================
+ /*!
+ * \brief Cut faces of a triangular mesh.
+ * Usage work-flow: 1) call Cut() methods as many times as needed
+ * 2) call MakeNewFaces() to really modify the mesh faces
+ */
+ //=======================================================================
+ // implemented in SMESH_Offset.cxx
+
+ class SMESHUtils_EXPORT Intersector
+ {
+ public:
+ Intersector( SMDS_Mesh* mesh, double tol, const std::vector< gp_XYZ >& normals );
+ ~Intersector();
+
+ //! Compute cut of two faces of the mesh
+ void Cut( const SMDS_MeshElement* face1,
+ const SMDS_MeshElement* face2,
+ const int nbCommonNodes = -1 );
+
+ //! Store a face cut by a line given by its ends lying either on face edges or inside the face.
+ // Line ends are accompanied by indices of intersected face edges.
+ // Edge index is <0 if a line end is inside the face.
+ void Cut( const SMDS_MeshElement* face,
+ SMESH_NodeXYZ& lineEnd1,
+ int edgeIndex1,
+ SMESH_NodeXYZ& lineEnd2,
+ int edgeIndex2 );
+
+ //! Split all faces intersected by Cut() methods.
+ // theSign = (-1|1) is used to choose which part of a face cut by another one to remove.
+ // 1 means to remove a part opposite to face normal.
+ // Optionally optimize quality of split faces by edge swapping.
+ void MakeNewFaces( SMESH_MeshAlgos::TElemIntPairVec& theNew2OldFaces,
+ SMESH_MeshAlgos::TNodeIntPairVec& theNew2OldNodes,
+ const double theSign = 1.,
+ const bool theOptimize = false );
+
+ typedef std::vector< SMESH_NodeXYZ > TFace;
+
+ //! Cut a face by planes, whose normals point to parts to keep.
+ // Return true if the whole face is cut off
+ static bool CutByPlanes(const SMDS_MeshElement* face,
+ const std::vector< gp_Ax1 > & planes,
+ const double tol,
+ std::vector< TFace > & newFaceConnectivity );
+
+ private:
+ struct Algo;
+ Algo* myAlgo;
+ };
+
+ //=======================================================================
+ /*!
+ * \brief Divide a mesh face into triangles
+ */
+ //=======================================================================
+ // Implemented in ./SMESH_Triangulate.cxx
+
+ class SMESHUtils_EXPORT Triangulate
+ {
+ public:
+
+ Triangulate(bool optimize=false);
+ ~Triangulate();
+
+ static int GetNbTriangles( const SMDS_MeshElement* face );
+
+ int GetTriangles( const SMDS_MeshElement* face,
+ std::vector< const SMDS_MeshNode*>& nodes);
+ private:
+
+ bool triangulate( std::vector< const SMDS_MeshNode*>& nodes, const size_t nbNodes );
+
+ struct PolyVertex;
+ struct Optimizer;
+ struct Data;
+
+ Data* _data;
+ Optimizer* _optimizer;
+ };
+
+ // structure used in MakePolyLine() to define a cutting plane
+ struct PolySegment
+ {
+ // 2 points, each defined as follows:
+ // ( myNode1 && myNode2 ) ==> point is in the middle of an edge defined by two nodes
+ // ( myNode1 && !myNode2 ) ==> point is at myNode1 of a some face
+ // else ==> point is at myXYZ
+ const SMDS_MeshNode* myNode1[2];
+ const SMDS_MeshNode* myNode2[2];
+ gp_XYZ myXYZ [2];
+
+ // face on which myXYZ projects (found by MakePolyLine())
+ const SMDS_MeshElement* myFace [2];
+
+ // vector on the plane; to use a default plane set vector = (0,0,0)
+ gp_Vec myVector;
+
+ // point returning coordinates of a middle of the two points, projected to mesh
+ gp_Pnt myMidProjPoint;
+ };
+ typedef std::vector<PolySegment> TListOfPolySegments;
+
+ /*!
+ * \brief Create a polyline consisting of 1D mesh elements each lying on a 2D element of
+ * the initial mesh. Positions of new nodes are found by cutting the mesh by the
+ * plane passing through pairs of points specified by each PolySegment structure.
+ * If there are several paths connecting a pair of points, the shortest path is
+ * selected by the module. Position of the cutting plane is defined by the two
+ * points and an optional vector lying on the plane specified by a PolySegment.
+ * By default the vector is defined by Mesh module as following. A middle point
+ * of the two given points is computed. The middle point is projected to the mesh.
+ * The vector goes from the middle point to the projection point. In case of planar
+ * mesh, the vector is normal to the mesh.
+ * \param [inout] segments - PolySegment's defining positions of cutting planes.
+ * Return the used vector and position of the middle point.
+ * \param [in] group - an optional group where created mesh segments will
+ * be added.
+ */
+ // Implemented in ./SMESH_PolyLine.cxx
+ SMESHUtils_EXPORT
+ void MakePolyLine( SMDS_Mesh* mesh,
+ TListOfPolySegments& segments,
+ std::vector<const SMDS_MeshElement*>& newEdges,
+ std::vector<const SMDS_MeshNode*>& newNodes,
+ SMDS_MeshGroup* group=0,
+ SMESH_ElementSearcher* searcher=0);
+
+ /*!
+ * Create a slot of given width around given 1D elements lying on a triangle mesh.
+ * The slot is constructed by cutting faces by cylindrical surfaces made around each segment.
+ * \return Edges located at the slot boundary
+ */
+ // Implemented in ./SMESH_Slot.cxx
+ SMESHUtils_EXPORT
+ std::vector< Edge > MakeSlot( SMDS_ElemIteratorPtr segmentIt,
+ double width,
+ SMDS_Mesh* mesh,
+ std::vector< SMDS_MeshGroup* > & groupsToUpdate);