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"
38 #include "TColStd_HSequenceOfReal.hxx"
39 #include "SMESH_MesherHelper.hxx"
40 #include "SMDS_MeshElement.hxx"
45 typedef map<const SMDS_MeshElement*,
46 list<const SMDS_MeshElement*> > TElemOfElemListMap;
47 typedef map<const SMDS_MeshNode*, const SMDS_MeshNode*> TNodeNodeMap;
49 typedef map<const SMDS_MeshNode*, SMESHDS_SubMesh*> RemoveQuadNodeMap;
50 typedef map<const SMDS_MeshNode*, SMESHDS_SubMesh*>::iterator ItRemoveQuadNodeMap;
58 class SMESH_MeshEditor {
61 // define a set of elements sorted by ID, to be used to assure
62 // predictability of edition
64 bool operator () (const SMDS_MeshElement* e1, const SMDS_MeshElement* e2)
65 { return e1->GetID() < e2->GetID(); }
67 typedef set< const SMDS_MeshElement*, TIDCompare > TIDSortedElemSet;
70 * \brief Insert element in a map of elements sorted by ID
71 * \param elem - element to insert
72 * \param elemMap - the map to fill in
74 static void Insert(const SMDS_MeshElement* elem,
75 std::map<int,const SMDS_MeshElement*> & elemMap) {
76 elemMap.insert( make_pair( elem->GetID(), elem ));
81 SMESH_MeshEditor( SMESH_Mesh* theMesh );
83 bool Remove (const std::list< int >& theElemIDs, const bool isNodes);
84 // Remove a node or an element.
85 // Modify a compute state of sub-meshes which become empty
87 bool InverseDiag (const SMDS_MeshElement * theTria1,
88 const SMDS_MeshElement * theTria2 );
89 // Replace two neighbour triangles with ones built on the same 4 nodes
90 // but having other common link.
91 // Return False if args are improper
93 bool InverseDiag (const SMDS_MeshNode * theNode1,
94 const SMDS_MeshNode * theNode2 );
95 // Replace two neighbour triangles sharing theNode1-theNode2 link
96 // with ones built on the same 4 nodes but having other common link.
97 // Return false if proper faces not found
99 bool DeleteDiag (const SMDS_MeshNode * theNode1,
100 const SMDS_MeshNode * theNode2 );
101 // Replace two neighbour triangles sharing theNode1-theNode2 link
102 // with a quadrangle built on the same 4 nodes.
103 // Return false if proper faces not found
105 bool Reorient (const SMDS_MeshElement * theElement);
106 // Reverse theElement orientation
110 * \brief Fuse neighbour triangles into quadrangles.
111 * \param theElems - The triangles to be fused.
112 * \param theCriterion - Is used to choose a neighbour to fuse with.
113 * \param theMaxAngle - Is a max angle between element normals at which fusion
114 * is still performed; theMaxAngle is mesured in radians.
115 * \retval bool - Success or not.
117 bool TriToQuad (std::map<int,const SMDS_MeshElement*> & theElems,
118 SMESH::Controls::NumericalFunctorPtr theCriterion,
119 const double theMaxAngle);
122 * \brief Split quadrangles into triangles.
123 * \param theElems - The faces to be splitted.
124 * \param theCriterion - Is used to choose a diagonal for splitting.
125 * \retval bool - Success or not.
127 bool QuadToTri (std::map<int,const SMDS_MeshElement*> & theElems,
128 SMESH::Controls::NumericalFunctorPtr theCriterion);
131 * \brief Split quadrangles into triangles.
132 * \param theElems - The faces to be splitted.
133 * \param the13Diag - Is used to choose a diagonal for splitting.
134 * \retval bool - Success or not.
136 bool QuadToTri (std::map<int,const SMDS_MeshElement*> & theElems,
137 const bool the13Diag);
140 * \brief Find better diagonal for splitting.
141 * \param theQuad - The face to find better splitting of.
142 * \param theCriterion - Is used to choose a diagonal for splitting.
143 * \retval int - 1 for 1-3 diagonal, 2 for 2-4, -1 - for errors.
145 int BestSplit (const SMDS_MeshElement* theQuad,
146 SMESH::Controls::NumericalFunctorPtr theCriterion);
149 enum SmoothMethod { LAPLACIAN = 0, CENTROIDAL };
151 void Smooth (std::map<int,const SMDS_MeshElement*> & theElements,
152 std::set<const SMDS_MeshNode*> & theFixedNodes,
153 const SmoothMethod theSmoothMethod,
154 const int theNbIterations,
155 double theTgtAspectRatio = 1.0,
156 const bool the2D = true);
157 // Smooth theElements using theSmoothMethod during theNbIterations
158 // or until a worst element has aspect ratio <= theTgtAspectRatio.
159 // Aspect Ratio varies in range [1.0, inf].
160 // If theElements is empty, the whole mesh is smoothed.
161 // theFixedNodes contains additionally fixed nodes. Nodes built
162 // on edges and boundary nodes are always fixed.
163 // If the2D, smoothing is performed using UV parameters of nodes
164 // on geometrical faces
167 void RotationSweep (std::map<int,const SMDS_MeshElement*> & theElements,
168 const gp_Ax1& theAxis,
169 const double theAngle,
170 const int theNbSteps,
171 const double theToler);
172 // Generate new elements by rotation of theElements around theAxis
173 // by theAngle by theNbSteps
176 * Auxilary flag for advanced extrusion.
177 * BOUNDARY: create or not boundary for result of extrusion
178 * SEW: try to use existing nodes or create new nodes in any case
180 enum ExtrusionFlags {
181 EXTRUSION_FLAG_BOUNDARY = 0x01,
182 EXTRUSION_FLAG_SEW = 0x02
186 * special structire for control of extrusion functionality
189 gp_Dir myDir; // direction of extrusion
190 Handle(TColStd_HSequenceOfReal) mySteps; // magnitudes for each step
191 SMESH_SequenceOfNode myNodes; // nodes for using in sewing
195 * Create new node in the mesh with given coordinates
196 * (auxilary for advanced extrusion)
198 const SMDS_MeshNode* CreateNode(const double x,
201 const double tolnode,
202 SMESH_SequenceOfNode& aNodes);
205 * Generate new elements by extrusion of theElements
206 * It is a method used in .idl file. All functionality
207 * is implemented in the next method (see below) which
208 * is used in the cuurent method.
209 * param theElems - list of elements for extrusion
210 * param newElemsMap returns history of extrusion
211 * param theFlags set flags for performing extrusion (see description
212 * of enum ExtrusionFlags for additional information)
213 * param theTolerance - uses for comparing locations of nodes if flag
214 * EXTRUSION_FLAG_SEW is set
217 (map<int,const SMDS_MeshElement*> & theElems,
218 const gp_Vec& theStep,
219 const int theNbSteps,
220 TElemOfElemListMap& newElemsMap,
221 const int theFlags = EXTRUSION_FLAG_BOUNDARY,
222 const double theTolerance = 1.e-6);
225 * Generate new elements by extrusion of theElements
226 * param theElems - list of elements for extrusion
227 * param newElemsMap returns history of extrusion
228 * param theFlags set flags for performing extrusion (see description
229 * of enum ExtrusionFlags for additional information)
230 * param theTolerance - uses for comparing locations of nodes if flag
231 * EXTRUSION_FLAG_SEW is set
232 * param theParams - special structure for manage of extrusion
234 void ExtrusionSweep (map<int,const SMDS_MeshElement*> & theElems,
235 ExtrusParam& theParams,
236 TElemOfElemListMap& newElemsMap,
238 const double theTolerance);
241 // Generate new elements by extrusion of theElements
242 // by theStep by theNbSteps
244 enum Extrusion_Error {
249 EXTR_BAD_STARTING_NODE,
250 EXTR_BAD_ANGLES_NUMBER,
251 EXTR_CANT_GET_TANGENT
254 Extrusion_Error ExtrusionAlongTrack (std::map<int,const SMDS_MeshElement*> & theElements,
255 SMESH_subMesh* theTrackPattern,
256 const SMDS_MeshNode* theNodeStart,
257 const bool theHasAngles,
258 std::list<double>& theAngles,
259 const bool theHasRefPoint,
260 const gp_Pnt& theRefPoint);
261 // Generate new elements by extrusion of theElements along path given by theTrackPattern,
262 // theHasAngles are the rotation angles, base point can be given by theRefPoint
264 void Transform (std::map<int,const SMDS_MeshElement*> & theElements,
265 const gp_Trsf& theTrsf,
267 // Move or copy theElements applying theTrsf to their nodes
269 typedef std::list< std::list< const SMDS_MeshNode* > > TListOfListOfNodes;
271 void FindCoincidentNodes (std::set<const SMDS_MeshNode*> & theNodes,
272 const double theTolerance,
273 TListOfListOfNodes & theGroupsOfNodes);
274 // Return list of group of nodes close to each other within theTolerance.
275 // Search among theNodes or in the whole mesh if theNodes is empty.
277 int SimplifyFace (const vector<const SMDS_MeshNode *> faceNodes,
278 vector<const SMDS_MeshNode *>& poly_nodes,
279 vector<int>& quantities) const;
280 // Split face, defined by <faceNodes>, into several faces by repeating nodes.
281 // Is used by MergeNodes()
283 void MergeNodes (TListOfListOfNodes & theNodeGroups);
284 // In each group, the cdr of nodes are substituted by the first one
287 void MergeEqualElements();
288 // Remove all but one of elements built on the same nodes.
289 // Return nb of successfully merged groups.
291 static bool CheckFreeBorderNodes(const SMDS_MeshNode* theNode1,
292 const SMDS_MeshNode* theNode2,
293 const SMDS_MeshNode* theNode3 = 0);
294 // Return true if the three nodes are on a free border
296 static bool FindFreeBorder (const SMDS_MeshNode* theFirstNode,
297 const SMDS_MeshNode* theSecondNode,
298 const SMDS_MeshNode* theLastNode,
299 std::list< const SMDS_MeshNode* > & theNodes,
300 std::list< const SMDS_MeshElement* >& theFaces);
301 // Return nodes and faces of a free border if found
305 // for SewFreeBorder()
306 SEW_BORDER1_NOT_FOUND,
307 SEW_BORDER2_NOT_FOUND,
308 SEW_BOTH_BORDERS_NOT_FOUND,
310 SEW_VOLUMES_TO_SPLIT,
311 // for SewSideElements()
312 SEW_DIFF_NB_OF_ELEMENTS,
313 SEW_TOPO_DIFF_SETS_OF_ELEMENTS,
320 Sew_Error SewFreeBorder (const SMDS_MeshNode* theBorderFirstNode,
321 const SMDS_MeshNode* theBorderSecondNode,
322 const SMDS_MeshNode* theBorderLastNode,
323 const SMDS_MeshNode* theSide2FirstNode,
324 const SMDS_MeshNode* theSide2SecondNode,
325 const SMDS_MeshNode* theSide2ThirdNode = 0,
326 const bool theSide2IsFreeBorder = true,
327 const bool toCreatePolygons = false,
328 const bool toCreatePolyedrs = false);
329 // Sew the free border to the side2 by replacing nodes in
330 // elements on the free border with nodes of the elements
331 // of the side 2. If nb of links in the free border and
332 // between theSide2FirstNode and theSide2LastNode are different,
333 // additional nodes are inserted on a link provided that no
334 // volume elements share the splitted link.
335 // The side 2 is a free border if theSide2IsFreeBorder == true.
336 // Sewing is peformed between the given first, second and last
337 // nodes on the sides.
338 // theBorderFirstNode is merged with theSide2FirstNode.
339 // if (!theSide2IsFreeBorder) then theSide2SecondNode gives
340 // the last node on the side 2, which will be merged with
341 // theBorderLastNode.
342 // if (theSide2IsFreeBorder) then theSide2SecondNode will
343 // be merged with theBorderSecondNode.
344 // if (theSide2IsFreeBorder && theSide2ThirdNode == 0) then
345 // the 2 free borders are sewn link by link and no additional
346 // nodes are inserted.
347 // Return false, if sewing failed.
349 Sew_Error SewSideElements (std::map<int,const SMDS_MeshElement*>& theSide1,
350 std::map<int,const SMDS_MeshElement*>& theSide2,
351 const SMDS_MeshNode* theFirstNode1ToMerge,
352 const SMDS_MeshNode* theFirstNode2ToMerge,
353 const SMDS_MeshNode* theSecondNode1ToMerge,
354 const SMDS_MeshNode* theSecondNode2ToMerge);
355 // Sew two sides of a mesh. Nodes belonging to theSide1 are
356 // merged with nodes of elements of theSide2.
357 // Number of elements in theSide1 and in theSide2 must be
358 // equal and they should have similar node connectivity.
359 // The nodes to merge should belong to side s borders and
360 // the first node should be linked to the second.
362 void InsertNodesIntoLink(const SMDS_MeshElement* theFace,
363 const SMDS_MeshNode* theBetweenNode1,
364 const SMDS_MeshNode* theBetweenNode2,
365 std::list<const SMDS_MeshNode*>& theNodesToInsert,
366 const bool toCreatePoly = false);
367 // insert theNodesToInsert into theFace between theBetweenNode1 and theBetweenNode2.
368 // If toCreatePoly is true, replace theFace by polygon, else split theFace.
370 void UpdateVolumes (const SMDS_MeshNode* theBetweenNode1,
371 const SMDS_MeshNode* theBetweenNode2,
372 std::list<const SMDS_MeshNode*>& theNodesToInsert);
373 // insert theNodesToInsert into all volumes, containing link
374 // theBetweenNode1 - theBetweenNode2, between theBetweenNode1 and theBetweenNode2.
376 void ConvertToQuadratic(const bool theForce3d);
377 //converts all mesh to quadratic one, deletes old elements, replacing
378 //them with quadratic ones with the same id.
380 bool ConvertFromQuadratic();
381 //converts all mesh from quadratic to ordinary ones, deletes old quadratic elements, replacing
382 //them with ordinary mesh elements with the same id.
385 // static int SortQuadNodes (const SMDS_Mesh * theMesh,
386 // int theNodeIds[] );
387 // // Set 4 nodes of a quadrangle face in a good order.
388 // // Swap 1<->2 or 2<->3 nodes and correspondingly return
391 // static bool SortHexaNodes (const SMDS_Mesh * theMesh,
392 // int theNodeIds[] );
393 // // Set 8 nodes of a hexahedron in a good order.
394 // // Return success status
396 static void AddToSameGroups (const SMDS_MeshElement* elemToAdd,
397 const SMDS_MeshElement* elemInGroups,
398 SMESHDS_Mesh * aMesh);
399 // Add elemToAdd to the groups the elemInGroups belongs to
401 static void RemoveElemFromGroups (const SMDS_MeshElement* removeelem,
402 SMESHDS_Mesh * aMesh);
403 // remove elemToAdd from the groups
405 static const SMDS_MeshElement*
406 FindFaceInSet(const SMDS_MeshNode* n1,
407 const SMDS_MeshNode* n2,
408 const std::map<int,const SMDS_MeshElement*>& elemSet,
409 const std::map<int,const SMDS_MeshElement*>& avoidSet);
410 // Return a face having linked nodes n1 and n2 and which is
411 // - not in avoidSet,
412 // - in elemSet provided that !elemSet.empty()
415 * \brief Find corresponding nodes in two sets of faces
416 * \param theSide1 - first face set
417 * \param theSide2 - second first face
418 * \param theFirstNode1 - a boundary node of set 1
419 * \param theFirstNode2 - a node of set 2 corresponding to theFirstNode1
420 * \param theSecondNode1 - a boundary node of set 1 linked with theFirstNode1
421 * \param theSecondNode2 - a node of set 2 corresponding to theSecondNode1
422 * \param nReplaceMap - output map of corresponding nodes
423 * \retval Sew_Error - is a success or not
425 static Sew_Error FindMatchingNodes(set<const SMDS_MeshElement*>& theSide1,
426 set<const SMDS_MeshElement*>& theSide2,
427 const SMDS_MeshNode* theFirstNode1,
428 const SMDS_MeshNode* theFirstNode2,
429 const SMDS_MeshNode* theSecondNode1,
430 const SMDS_MeshNode* theSecondNode2,
431 TNodeNodeMap & nReplaceMap);
434 * \brief Returns true if given node is medium
435 * \param n - node to check
436 * \param typeToCheck - type of elements containing the node to ask about node status
437 * \retval bool - check result
439 static bool IsMedium(const SMDS_MeshNode* node,
440 const SMDSAbs_ElementType typeToCheck = SMDSAbs_All);
442 int FindShape (const SMDS_MeshElement * theElem);
443 // Return an index of the shape theElem is on
444 // or zero if a shape not found
446 SMESH_Mesh * GetMesh() { return myMesh; }
448 SMESHDS_Mesh * GetMeshDS() { return myMesh->GetMeshDS(); }
450 SMESH_SequenceOfElemPtr GetLastCreatedNodes() { return myLastCreatedNodes; }
452 SMESH_SequenceOfElemPtr GetLastCreatedElems() { return myLastCreatedElems; }
456 void ConvertElemToQuadratic(SMESHDS_SubMesh *theSm,
457 SMESH_MesherHelper* theHelper,
458 const bool theForce3d);
459 //Auxiliary function for "ConvertToQuadratic" is intended to convert
460 //elements contained in submesh to quadratic
462 void RemoveQuadElem( SMESHDS_SubMesh *theSm,
463 SMDS_ElemIteratorPtr theItr,
464 RemoveQuadNodeMap& theRemoveNodeMap);
465 //Auxiliary function for "ConvertFromQuadratic" is intended to convert quadratic
466 //element to ordinary and for removing quadratic nodes
473 * Sequence for keeping nodes created during last operation
475 SMESH_SequenceOfElemPtr myLastCreatedNodes;
478 * Sequence for keeping elements created during last operation
480 SMESH_SequenceOfElemPtr myLastCreatedElems;