1 // SMESH SMESH : implementaion of SMESH idl descriptions
3 // Copyright (C) 2003 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
24 // File : SMESH_Algo.hxx
25 // Author : Paul RASCLE, EDF
29 #ifndef _SMESH_ALGO_HXX_
30 #define _SMESH_ALGO_HXX_
32 #include "SMESH_SMESH.hxx"
34 #include "SMESH_Hypothesis.hxx"
35 #include "SMESH_ComputeError.hxx"
36 #include "SMESH_Comment.hxx"
38 #include <TopoDS_Shape.hxx>
39 #include <TopoDS_Edge.hxx>
40 #include <GeomAbs_Shape.hxx>
48 class SMESH_HypoFilter;
55 class SMESH_MesherHelper;
58 class SMESH_EXPORT SMESH_Algo:public SMESH_Hypothesis
62 * \brief Creates algorithm
63 * \param hypId - algorithm ID
64 * \param studyId - study ID
65 * \param gen - SMESH_Gen
67 SMESH_Algo(int hypId, int studyId, SMESH_Gen * gen);
72 virtual ~ SMESH_Algo();
75 * \brief Saves nothing in a stream
76 * \param save - the stream
77 * \retval virtual std::ostream & - the stream
79 virtual std::ostream & SaveTo(std::ostream & save);
82 * \brief Loads nothing from a stream
83 * \param load - the stream
84 * \retval virtual std::ostream & - the stream
86 virtual std::istream & LoadFrom(std::istream & load);
89 * \brief Returns all types of compatible hypotheses
91 const std::vector < std::string > & GetCompatibleHypothesis();
94 * \brief Check hypothesis definition to mesh a shape
95 * \param aMesh - the mesh
96 * \param aShape - the shape
97 * \param aStatus - check result
98 * \retval bool - true if hypothesis is well defined
100 virtual bool CheckHypothesis(SMESH_Mesh& aMesh,
101 const TopoDS_Shape& aShape,
102 SMESH_Hypothesis::Hypothesis_Status& aStatus) = 0;
104 * \brief Computes mesh on a shape
105 * \param aMesh - the mesh
106 * \param aShape - the shape
107 * \retval bool - is a success
109 * Algorithms that !NeedDescretBoundary() || !OnlyUnaryInput() are
110 * to set SMESH_ComputeError returned by SMESH_submesh::GetComputeError()
111 * to report problematic subshapes
113 virtual bool Compute(SMESH_Mesh & aMesh, const TopoDS_Shape & aShape) = 0;
116 * \brief Computes mesh without geometry
117 * \param aMesh - the mesh
118 * \param aHelper - helper that must be used for adding elements to \aaMesh
119 * \retval bool - is a success
121 * The method is called if ( !aMesh->HasShapeToMesh() )
123 virtual bool Compute(SMESH_Mesh & aMesh, SMESH_MesherHelper* aHelper);
126 * \brief Returns a list of compatible hypotheses used to mesh a shape
127 * \param aMesh - the mesh
128 * \param aShape - the shape
129 * \param ignoreAuxiliary - do not include auxiliary hypotheses in the list
130 * \retval const std::list <const SMESHDS_Hypothesis*> - hypotheses list
132 * List the hypothesis used by the algorithm associated to the shape.
133 * Hypothesis associated to father shape -are- taken into account (see
134 * GetAppliedHypothesis). Relevant hypothesis have a name (type) listed in
135 * the algorithm. This method could be surcharged by specific algorithms, in
136 * case of several hypothesis simultaneously applicable.
138 virtual const std::list <const SMESHDS_Hypothesis *> &
139 GetUsedHypothesis(SMESH_Mesh & aMesh,
140 const TopoDS_Shape & aShape,
141 const bool ignoreAuxiliary=true);
143 * \brief Returns a list of compatible hypotheses assigned to a shape in a mesh
144 * \param aMesh - the mesh
145 * \param aShape - the shape
146 * \param ignoreAuxiliary - do not include auxiliary hypotheses in the list
147 * \retval const std::list <const SMESHDS_Hypothesis*> - hypotheses list
149 * List the relevant hypothesis associated to the shape. Relevant hypothesis
150 * have a name (type) listed in the algorithm. Hypothesis associated to
151 * father shape -are not- taken into account (see GetUsedHypothesis)
153 const list <const SMESHDS_Hypothesis *> &
154 GetAppliedHypothesis(SMESH_Mesh & aMesh,
155 const TopoDS_Shape & aShape,
156 const bool ignoreAuxiliary=true);
158 * \brief Make the filter recognize only compatible hypotheses
159 * \param theFilter - the filter to initialize
160 * \param ignoreAuxiliary - make filter ignore compatible auxiliary hypotheses
161 * \retval bool - true if the algo has compatible hypotheses
163 bool InitCompatibleHypoFilter( SMESH_HypoFilter & theFilter,
164 const bool ignoreAuxiliary) const;
166 * \brief Initialize my parameter values by the mesh built on the geometry
168 * Just return false as the algorithm does not hold parameters values
170 virtual bool SetParametersByMesh(const SMESH_Mesh* theMesh,
171 const TopoDS_Shape& theShape);
173 * \brief return compute error
175 SMESH_ComputeErrorPtr GetComputeError() const;
177 * \brief initialize compute error
179 void InitComputeError();
182 // ==================================================================
183 // Algo features influencing how Compute() is called:
184 // in what turn and with what input shape
185 // ==================================================================
187 // SMESH_Hypothesis::GetDim();
188 // 1 - dimention of target mesh
190 bool OnlyUnaryInput() const { return _onlyUnaryInput; }
191 // 2 - is collection of tesselatable shapes inacceptable as input;
192 // "collection" means a shape containing shapes of dim equal
194 // Algo which can process a collection shape should expect
195 // an input temporary shape that is neither MainShape nor
198 bool NeedDescretBoundary() const { return _requireDescretBoundary; }
199 // 3 - is a Dim-1 mesh prerequisite
201 bool NeedShape() const { return _requireShape; }
202 // 4 - is shape existance required
205 // ==================================================================
206 // Methods to track non hierarchical dependencies between submeshes
207 // ==================================================================
210 * \brief Sets event listener to submeshes if necessary
211 * \param subMesh - submesh where algo is set
213 * This method is called when a submesh gets HYP_OK algo_state.
214 * After being set, event listener is notified on each event of a submesh.
215 * By default non listener is set
217 virtual void SetEventListener(SMESH_subMesh* subMesh);
220 * \brief Allow algo to do something after persistent restoration
221 * \param subMesh - restored submesh
223 * This method is called only if a submesh has HYP_OK algo_state.
225 virtual void SubmeshRestored(SMESH_subMesh* subMesh);
228 // ==================================================================
229 // Common algo utilities
230 // ==================================================================
232 * \brief Fill vector of node parameters on geometrical edge, including vertex nodes
233 * \param theMesh - The mesh containing nodes
234 * \param theEdge - The geometrical edge of interest
235 * \param theParams - The resulting vector of sorted node parameters
236 * \retval bool - false if not all parameters are OK
238 static bool GetNodeParamOnEdge(const SMESHDS_Mesh* theMesh,
239 const TopoDS_Edge& theEdge,
240 std::vector< double > & theParams);
242 * \brief Find out elements orientation on a geometrical face
243 * \param theFace - The face correctly oriented in the shape being meshed
244 * \param theMeshDS - The mesh data structure
245 * \retval bool - true if the face normal and the normal of first element
246 * in the correspoding submesh point in different directions
248 static bool IsReversedSubMesh (const TopoDS_Face& theFace,
249 SMESHDS_Mesh* theMeshDS);
251 * \brief Compute length of an edge
252 * \param E - the edge
253 * \retval double - the length
255 static double EdgeLength(const TopoDS_Edge & E);
258 * \brief Return continuity of two edges
259 * \param E1 - the 1st edge
260 * \param E2 - the 2nd edge
261 * \retval GeomAbs_Shape - regularity at the junction between E1 and E2
263 static GeomAbs_Shape Continuity(const TopoDS_Edge & E1, const TopoDS_Edge & E2);
266 * \brief Return true if an edge can be considered as a continuation of another
268 static bool IsContinuous(const TopoDS_Edge & E1, const TopoDS_Edge & E2) {
269 return ( Continuity( E1, E2 ) >= GeomAbs_G1 );
273 * \brief Return the node built on a vertex
274 * \param V - the vertex
275 * \param meshDS - mesh
276 * \retval const SMDS_MeshNode* - found node or NULL
278 static const SMDS_MeshNode* VertexNode(const TopoDS_Vertex& V,
279 SMESHDS_Mesh* meshDS);
284 * \brief store error and comment and then return ( error == COMPERR_OK )
286 bool error(int error, const SMESH_Comment& comment = "");
288 * \brief store COMPERR_ALGO_FAILED error and comment and then return false
290 bool error(const SMESH_Comment& comment = "")
291 { return error(COMPERR_ALGO_FAILED, comment); }
293 * \brief store error and return error->IsOK()
295 bool error(SMESH_ComputeErrorPtr error);
297 * \brief store a bad input element preventing computation,
298 * which may be a temporary one i.e. not residing the mesh,
299 * then it will be deleted by InitComputeError()
301 void addBadInputElement(const SMDS_MeshElement* elem);
305 std::vector<std::string> _compatibleHypothesis;
306 std::list<const SMESHDS_Hypothesis *> _appliedHypList;
307 std::list<const SMESHDS_Hypothesis *> _usedHypList;
309 bool _onlyUnaryInput;
310 bool _requireDescretBoundary;
313 // quadratic mesh creation required,
314 // is usually set trough SMESH_MesherHelper::IsQuadraticSubMesh()
317 int _error; //!< SMESH_ComputeErrorName or anything algo specific
318 std::string _comment; //!< any text explaining what is wrong in Compute()
319 std::list<const SMDS_MeshElement*> _badInputElements; //!< to explain COMPERR_BAD_INPUT_MESH