1 // SMESH SMESH_I : idl implementation based on 'SMESH' unit's calsses
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_MeshEditor.hxx
25 // Created : Mon Apr 12 14:56:19 2004
26 // Author : Edward AGAPOV (eap)
30 #ifndef SMESH_MeshEditor_HeaderFile
31 #define SMESH_MeshEditor_HeaderFile
33 #include "SMESH_Mesh.hxx"
34 #include "SMESH_Controls.hxx"
35 #include "SMESH_SequenceOfNode.hxx"
36 #include "SMESH_SequenceOfElemPtr.hxx"
37 #include "TColStd_HSequenceOfReal.hxx"
38 #include "SMESH_MesherHelper.hxx"
39 #include "SMDS_MeshElement.hxx"
46 typedef std::map<const SMDS_MeshElement*,
47 std::list<const SMDS_MeshElement*> > TElemOfElemListMap;
48 typedef std::map<const SMDS_MeshNode*, const SMDS_MeshNode*> TNodeNodeMap;
56 // ============================================================
58 * \brief Set of elements sorted by ID, to be used to assure
59 * predictability of edition
61 // ============================================================
63 template < class TMeshElem = SMDS_MeshElement>
65 bool operator () (const TMeshElem* e1, const TMeshElem* e2) const
66 { return e1->GetID() < e2->GetID(); }
68 typedef std::set< const SMDS_MeshElement*, TIDCompare< SMDS_MeshElement> > TIDSortedElemSet;
70 // ============================================================
72 * \brief Editor of a mesh
74 // ============================================================
76 class SMESH_MeshEditor {
80 SMESH_MeshEditor( SMESH_Mesh* theMesh );
82 bool Remove (const std::list< int >& theElemIDs, const bool isNodes);
83 // Remove a node or an element.
84 // Modify a compute state of sub-meshes which become empty
86 bool InverseDiag (const SMDS_MeshElement * theTria1,
87 const SMDS_MeshElement * theTria2 );
88 // Replace two neighbour triangles with ones built on the same 4 nodes
89 // but having other common link.
90 // Return False if args are improper
92 bool InverseDiag (const SMDS_MeshNode * theNode1,
93 const SMDS_MeshNode * theNode2 );
94 // Replace two neighbour triangles sharing theNode1-theNode2 link
95 // with ones built on the same 4 nodes but having other common link.
96 // Return false if proper faces not found
98 bool DeleteDiag (const SMDS_MeshNode * theNode1,
99 const SMDS_MeshNode * theNode2 );
100 // Replace two neighbour triangles sharing theNode1-theNode2 link
101 // with a quadrangle built on the same 4 nodes.
102 // Return false if proper faces not found
104 bool Reorient (const SMDS_MeshElement * theElement);
105 // Reverse theElement orientation
109 * \brief Fuse neighbour triangles into quadrangles.
110 * \param theElems - The triangles to be fused.
111 * \param theCriterion - Is used to choose a neighbour to fuse with.
112 * \param theMaxAngle - Is a max angle between element normals at which fusion
113 * is still performed; theMaxAngle is mesured in radians.
114 * \retval bool - Success or not.
116 bool TriToQuad (TIDSortedElemSet & theElems,
117 SMESH::Controls::NumericalFunctorPtr theCriterion,
118 const double theMaxAngle);
121 * \brief Split quadrangles into triangles.
122 * \param theElems - The faces to be splitted.
123 * \param theCriterion - Is used to choose a diagonal for splitting.
124 * \retval bool - Success or not.
126 bool QuadToTri (TIDSortedElemSet & theElems,
127 SMESH::Controls::NumericalFunctorPtr theCriterion);
130 * \brief Split quadrangles into triangles.
131 * \param theElems - The faces to be splitted.
132 * \param the13Diag - Is used to choose a diagonal for splitting.
133 * \retval bool - Success or not.
135 bool QuadToTri (TIDSortedElemSet & theElems,
136 const bool the13Diag);
139 * \brief Find better diagonal for splitting.
140 * \param theQuad - The face to find better splitting of.
141 * \param theCriterion - Is used to choose a diagonal for splitting.
142 * \retval int - 1 for 1-3 diagonal, 2 for 2-4, -1 - for errors.
144 int BestSplit (const SMDS_MeshElement* theQuad,
145 SMESH::Controls::NumericalFunctorPtr theCriterion);
148 enum SmoothMethod { LAPLACIAN = 0, CENTROIDAL };
150 void Smooth (TIDSortedElemSet & theElements,
151 std::set<const SMDS_MeshNode*> & theFixedNodes,
152 const SmoothMethod theSmoothMethod,
153 const int theNbIterations,
154 double theTgtAspectRatio = 1.0,
155 const bool the2D = true);
156 // Smooth theElements using theSmoothMethod during theNbIterations
157 // or until a worst element has aspect ratio <= theTgtAspectRatio.
158 // Aspect Ratio varies in range [1.0, inf].
159 // If theElements is empty, the whole mesh is smoothed.
160 // theFixedNodes contains additionally fixed nodes. Nodes built
161 // on edges and boundary nodes are always fixed.
162 // If the2D, smoothing is performed using UV parameters of nodes
163 // on geometrical faces
166 void RotationSweep (TIDSortedElemSet & theElements,
167 const gp_Ax1& theAxis,
168 const double theAngle,
169 const int theNbSteps,
170 const double theToler);
171 // Generate new elements by rotation of theElements around theAxis
172 // by theAngle by theNbSteps
175 * Auxilary flag for advanced extrusion.
176 * BOUNDARY: create or not boundary for result of extrusion
177 * SEW: try to use existing nodes or create new nodes in any case
179 enum ExtrusionFlags {
180 EXTRUSION_FLAG_BOUNDARY = 0x01,
181 EXTRUSION_FLAG_SEW = 0x02
185 * special structire for control of extrusion functionality
188 gp_Dir myDir; // direction of extrusion
189 Handle(TColStd_HSequenceOfReal) mySteps; // magnitudes for each step
190 SMESH_SequenceOfNode myNodes; // nodes for using in sewing
194 * Create new node in the mesh with given coordinates
195 * (auxilary for advanced extrusion)
197 const SMDS_MeshNode* CreateNode(const double x,
200 const double tolnode,
201 SMESH_SequenceOfNode& aNodes);
204 * Generate new elements by extrusion of theElements
205 * It is a method used in .idl file. All functionality
206 * is implemented in the next method (see below) which
207 * is used in the cuurent method.
208 * param theElems - list of elements for extrusion
209 * param newElemsMap returns history of extrusion
210 * param theFlags set flags for performing extrusion (see description
211 * of enum ExtrusionFlags for additional information)
212 * param theTolerance - uses for comparing locations of nodes if flag
213 * EXTRUSION_FLAG_SEW is set
216 (TIDSortedElemSet & theElems,
217 const gp_Vec& theStep,
218 const int theNbSteps,
219 TElemOfElemListMap& newElemsMap,
220 const int theFlags = EXTRUSION_FLAG_BOUNDARY,
221 const double theTolerance = 1.e-6);
224 * Generate new elements by extrusion of theElements
225 * param theElems - list of elements for extrusion
226 * param newElemsMap returns history of extrusion
227 * param theFlags set flags for performing extrusion (see description
228 * of enum ExtrusionFlags for additional information)
229 * param theTolerance - uses for comparing locations of nodes if flag
230 * EXTRUSION_FLAG_SEW is set
231 * param theParams - special structure for manage of extrusion
233 void ExtrusionSweep (TIDSortedElemSet & theElems,
234 ExtrusParam& theParams,
235 TElemOfElemListMap& newElemsMap,
237 const double theTolerance);
240 // Generate new elements by extrusion of theElements
241 // by theStep by theNbSteps
243 enum Extrusion_Error {
248 EXTR_BAD_STARTING_NODE,
249 EXTR_BAD_ANGLES_NUMBER,
250 EXTR_CANT_GET_TANGENT
253 Extrusion_Error ExtrusionAlongTrack (TIDSortedElemSet & theElements,
254 SMESH_subMesh* theTrackPattern,
255 const SMDS_MeshNode* theNodeStart,
256 const bool theHasAngles,
257 std::list<double>& theAngles,
258 const bool theHasRefPoint,
259 const gp_Pnt& theRefPoint);
260 // Generate new elements by extrusion of theElements along path given by theTrackPattern,
261 // theHasAngles are the rotation angles, base point can be given by theRefPoint
263 void Transform (TIDSortedElemSet & theElements,
264 const gp_Trsf& theTrsf,
266 // Move or copy theElements applying theTrsf to their nodes
268 typedef std::list< std::list< const SMDS_MeshNode* > > TListOfListOfNodes;
270 void FindCoincidentNodes (std::set<const SMDS_MeshNode*> & theNodes,
271 const double theTolerance,
272 TListOfListOfNodes & theGroupsOfNodes);
273 // Return list of group of nodes close to each other within theTolerance.
274 // Search among theNodes or in the whole mesh if theNodes is empty.
276 int SimplifyFace (const vector<const SMDS_MeshNode *> faceNodes,
277 vector<const SMDS_MeshNode *>& poly_nodes,
278 vector<int>& quantities) const;
279 // Split face, defined by <faceNodes>, into several faces by repeating nodes.
280 // Is used by MergeNodes()
282 void MergeNodes (TListOfListOfNodes & theNodeGroups);
283 // In each group, the cdr of nodes are substituted by the first one
286 void MergeEqualElements();
287 // Remove all but one of elements built on the same nodes.
288 // Return nb of successfully merged groups.
290 static bool CheckFreeBorderNodes(const SMDS_MeshNode* theNode1,
291 const SMDS_MeshNode* theNode2,
292 const SMDS_MeshNode* theNode3 = 0);
293 // Return true if the three nodes are on a free border
295 static bool FindFreeBorder (const SMDS_MeshNode* theFirstNode,
296 const SMDS_MeshNode* theSecondNode,
297 const SMDS_MeshNode* theLastNode,
298 std::list< const SMDS_MeshNode* > & theNodes,
299 std::list< const SMDS_MeshElement* >& theFaces);
300 // Return nodes and faces of a free border if found
304 // for SewFreeBorder()
305 SEW_BORDER1_NOT_FOUND,
306 SEW_BORDER2_NOT_FOUND,
307 SEW_BOTH_BORDERS_NOT_FOUND,
309 SEW_VOLUMES_TO_SPLIT,
310 // for SewSideElements()
311 SEW_DIFF_NB_OF_ELEMENTS,
312 SEW_TOPO_DIFF_SETS_OF_ELEMENTS,
319 Sew_Error SewFreeBorder (const SMDS_MeshNode* theBorderFirstNode,
320 const SMDS_MeshNode* theBorderSecondNode,
321 const SMDS_MeshNode* theBorderLastNode,
322 const SMDS_MeshNode* theSide2FirstNode,
323 const SMDS_MeshNode* theSide2SecondNode,
324 const SMDS_MeshNode* theSide2ThirdNode = 0,
325 const bool theSide2IsFreeBorder = true,
326 const bool toCreatePolygons = false,
327 const bool toCreatePolyedrs = false);
328 // Sew the free border to the side2 by replacing nodes in
329 // elements on the free border with nodes of the elements
330 // of the side 2. If nb of links in the free border and
331 // between theSide2FirstNode and theSide2LastNode are different,
332 // additional nodes are inserted on a link provided that no
333 // volume elements share the splitted link.
334 // The side 2 is a free border if theSide2IsFreeBorder == true.
335 // Sewing is peformed between the given first, second and last
336 // nodes on the sides.
337 // theBorderFirstNode is merged with theSide2FirstNode.
338 // if (!theSide2IsFreeBorder) then theSide2SecondNode gives
339 // the last node on the side 2, which will be merged with
340 // theBorderLastNode.
341 // if (theSide2IsFreeBorder) then theSide2SecondNode will
342 // be merged with theBorderSecondNode.
343 // if (theSide2IsFreeBorder && theSide2ThirdNode == 0) then
344 // the 2 free borders are sewn link by link and no additional
345 // nodes are inserted.
346 // Return false, if sewing failed.
348 Sew_Error SewSideElements (TIDSortedElemSet& theSide1,
349 TIDSortedElemSet& theSide2,
350 const SMDS_MeshNode* theFirstNode1ToMerge,
351 const SMDS_MeshNode* theFirstNode2ToMerge,
352 const SMDS_MeshNode* theSecondNode1ToMerge,
353 const SMDS_MeshNode* theSecondNode2ToMerge);
354 // Sew two sides of a mesh. Nodes belonging to theSide1 are
355 // merged with nodes of elements of theSide2.
356 // Number of elements in theSide1 and in theSide2 must be
357 // equal and they should have similar node connectivity.
358 // The nodes to merge should belong to side s borders and
359 // the first node should be linked to the second.
361 void InsertNodesIntoLink(const SMDS_MeshElement* theFace,
362 const SMDS_MeshNode* theBetweenNode1,
363 const SMDS_MeshNode* theBetweenNode2,
364 std::list<const SMDS_MeshNode*>& theNodesToInsert,
365 const bool toCreatePoly = false);
366 // insert theNodesToInsert into theFace between theBetweenNode1 and theBetweenNode2.
367 // If toCreatePoly is true, replace theFace by polygon, else split theFace.
369 void UpdateVolumes (const SMDS_MeshNode* theBetweenNode1,
370 const SMDS_MeshNode* theBetweenNode2,
371 std::list<const SMDS_MeshNode*>& theNodesToInsert);
372 // insert theNodesToInsert into all volumes, containing link
373 // theBetweenNode1 - theBetweenNode2, between theBetweenNode1 and theBetweenNode2.
375 void ConvertToQuadratic(const bool theForce3d);
376 //converts all mesh to quadratic one, deletes old elements, replacing
377 //them with quadratic ones with the same id.
379 bool ConvertFromQuadratic();
380 //converts all mesh from quadratic to ordinary ones, deletes old quadratic elements, replacing
381 //them with ordinary mesh elements with the same id.
384 // static int SortQuadNodes (const SMDS_Mesh * theMesh,
385 // int theNodeIds[] );
386 // // Set 4 nodes of a quadrangle face in a good order.
387 // // Swap 1<->2 or 2<->3 nodes and correspondingly return
390 // static bool SortHexaNodes (const SMDS_Mesh * theMesh,
391 // int theNodeIds[] );
392 // // Set 8 nodes of a hexahedron in a good order.
393 // // Return success status
395 static void AddToSameGroups (const SMDS_MeshElement* elemToAdd,
396 const SMDS_MeshElement* elemInGroups,
397 SMESHDS_Mesh * aMesh);
398 // Add elemToAdd to the groups the elemInGroups belongs to
400 static void RemoveElemFromGroups (const SMDS_MeshElement* removeelem,
401 SMESHDS_Mesh * aMesh);
402 // remove elemToAdd from the groups
404 static const SMDS_MeshElement*
405 FindFaceInSet(const SMDS_MeshNode* n1,
406 const SMDS_MeshNode* n2,
407 const TIDSortedElemSet& elemSet,
408 const TIDSortedElemSet& avoidSet);
409 // Return a face having linked nodes n1 and n2 and which is
410 // - not in avoidSet,
411 // - in elemSet provided that !elemSet.empty()
414 * \brief Find corresponding nodes in two sets of faces
415 * \param theSide1 - first face set
416 * \param theSide2 - second first face
417 * \param theFirstNode1 - a boundary node of set 1
418 * \param theFirstNode2 - a node of set 2 corresponding to theFirstNode1
419 * \param theSecondNode1 - a boundary node of set 1 linked with theFirstNode1
420 * \param theSecondNode2 - a node of set 2 corresponding to theSecondNode1
421 * \param nReplaceMap - output map of corresponding nodes
422 * \retval Sew_Error - is a success or not
424 static Sew_Error FindMatchingNodes(set<const SMDS_MeshElement*>& theSide1,
425 set<const SMDS_MeshElement*>& theSide2,
426 const SMDS_MeshNode* theFirstNode1,
427 const SMDS_MeshNode* theFirstNode2,
428 const SMDS_MeshNode* theSecondNode1,
429 const SMDS_MeshNode* theSecondNode2,
430 TNodeNodeMap & nReplaceMap);
433 * \brief Returns true if given node is medium
434 * \param n - node to check
435 * \param typeToCheck - type of elements containing the node to ask about node status
436 * \retval bool - check result
438 static bool IsMedium(const SMDS_MeshNode* node,
439 const SMDSAbs_ElementType typeToCheck = SMDSAbs_All);
441 int FindShape (const SMDS_MeshElement * theElem);
442 // Return an index of the shape theElem is on
443 // or zero if a shape not found
445 SMESH_Mesh * GetMesh() { return myMesh; }
447 SMESHDS_Mesh * GetMeshDS() { return myMesh->GetMeshDS(); }
449 const SMESH_SequenceOfElemPtr& GetLastCreatedNodes() const { return myLastCreatedNodes; }
451 const SMESH_SequenceOfElemPtr& GetLastCreatedElems() const { return myLastCreatedElems; }
455 void ConvertElemToQuadratic(SMESHDS_SubMesh * theSm,
456 SMESH_MesherHelper& theHelper,
457 const bool theForce3d);
458 //Auxiliary function for "ConvertToQuadratic" is intended to convert
459 //elements contained in submesh to quadratic
461 void RemoveQuadElem( SMESHDS_SubMesh * theSm,
462 SMDS_ElemIteratorPtr theItr,
463 const int theShapeID);
464 //Auxiliary function for "ConvertFromQuadratic" is intended to convert quadratic
465 //element to ordinary and for removing quadratic nodes
472 * Sequence for keeping nodes created during last operation
474 SMESH_SequenceOfElemPtr myLastCreatedNodes;
477 * Sequence for keeping elements created during last operation
479 SMESH_SequenceOfElemPtr myLastCreatedElems;