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"
44 typedef map<const SMDS_MeshElement*,
45 list<const SMDS_MeshElement*> > TElemOfElemListMap;
47 typedef map<const SMDS_MeshNode*, SMESHDS_SubMesh*> RemoveQuadNodeMap;
48 typedef map<const SMDS_MeshNode*, SMESHDS_SubMesh*>::iterator ItRemoveQuadNodeMap;
50 class SMDS_MeshElement;
57 class SMESH_MeshEditor {
60 // define a set of elements sorted by ID, to be used to assure
61 // predictability of edition
63 bool operator () (const SMDS_MeshElement* e1, const SMDS_MeshElement* e2)
64 { return e1->GetID() < e2->GetID(); }
66 typedef set< const SMDS_MeshElement*, TIDCompare > TIDSortedElemSet;
70 SMESH_MeshEditor( SMESH_Mesh* theMesh );
72 bool Remove (const std::list< int >& theElemIDs, const bool isNodes);
73 // Remove a node or an element.
74 // Modify a compute state of sub-meshes which become empty
76 bool InverseDiag (const SMDS_MeshElement * theTria1,
77 const SMDS_MeshElement * theTria2 );
78 // Replace two neighbour triangles with ones built on the same 4 nodes
79 // but having other common link.
80 // Return False if args are improper
82 bool InverseDiag (const SMDS_MeshNode * theNode1,
83 const SMDS_MeshNode * theNode2 );
84 // Replace two neighbour triangles sharing theNode1-theNode2 link
85 // with ones built on the same 4 nodes but having other common link.
86 // Return false if proper faces not found
88 bool DeleteDiag (const SMDS_MeshNode * theNode1,
89 const SMDS_MeshNode * theNode2 );
90 // Replace two neighbour triangles sharing theNode1-theNode2 link
91 // with a quadrangle built on the same 4 nodes.
92 // Return false if proper faces not found
94 bool Reorient (const SMDS_MeshElement * theElement);
95 // Reverse theElement orientation
99 * \brief Fuse neighbour triangles into quadrangles.
100 * \param theElems - The triangles to be fused.
101 * \param theCriterion - Is used to choose a neighbour to fuse with.
102 * \param theMaxAngle - Is a max angle between element normals at which fusion
103 * is still performed; theMaxAngle is mesured in radians.
104 * \retval bool - Success or not.
106 bool TriToQuad (std::map<int,const SMDS_MeshElement*> & theElems,
107 SMESH::Controls::NumericalFunctorPtr theCriterion,
108 const double theMaxAngle);
111 * \brief Split quadrangles into triangles.
112 * \param theElems - The faces to be splitted.
113 * \param theCriterion - Is used to choose a diagonal for splitting.
114 * \retval bool - Success or not.
116 bool QuadToTri (std::map<int,const SMDS_MeshElement*> & theElems,
117 SMESH::Controls::NumericalFunctorPtr theCriterion);
120 * \brief Split quadrangles into triangles.
121 * \param theElems - The faces to be splitted.
122 * \param the13Diag - Is used to choose a diagonal for splitting.
123 * \retval bool - Success or not.
125 bool QuadToTri (std::map<int,const SMDS_MeshElement*> & theElems,
126 const bool the13Diag);
129 * \brief Find better diagonal for splitting.
130 * \param theQuad - The face to find better splitting of.
131 * \param theCriterion - Is used to choose a diagonal for splitting.
132 * \retval int - 1 for 1-3 diagonal, 2 for 2-4, -1 - for errors.
134 int BestSplit (const SMDS_MeshElement* theQuad,
135 SMESH::Controls::NumericalFunctorPtr theCriterion);
138 enum SmoothMethod { LAPLACIAN = 0, CENTROIDAL };
140 void Smooth (std::map<int,const SMDS_MeshElement*> & theElements,
141 std::set<const SMDS_MeshNode*> & theFixedNodes,
142 const SmoothMethod theSmoothMethod,
143 const int theNbIterations,
144 double theTgtAspectRatio = 1.0,
145 const bool the2D = true);
146 // Smooth theElements using theSmoothMethod during theNbIterations
147 // or until a worst element has aspect ratio <= theTgtAspectRatio.
148 // Aspect Ratio varies in range [1.0, inf].
149 // If theElements is empty, the whole mesh is smoothed.
150 // theFixedNodes contains additionally fixed nodes. Nodes built
151 // on edges and boundary nodes are always fixed.
152 // If the2D, smoothing is performed using UV parameters of nodes
153 // on geometrical faces
156 void RotationSweep (std::map<int,const SMDS_MeshElement*> & theElements,
157 const gp_Ax1& theAxis,
158 const double theAngle,
159 const int theNbSteps,
160 const double theToler);
161 // Generate new elements by rotation of theElements around theAxis
162 // by theAngle by theNbSteps
165 * Auxilary flag for advanced extrusion.
166 * BOUNDARY: create or not boundary for result of extrusion
167 * SEW: try to use existing nodes or create new nodes in any case
169 enum ExtrusionFlags {
170 EXTRUSION_FLAG_BOUNDARY = 0x01,
171 EXTRUSION_FLAG_SEW = 0x02
175 * special structire for control of extrusion functionality
178 gp_Dir myDir; // direction of extrusion
179 Handle(TColStd_HSequenceOfReal) mySteps; // magnitudes for each step
180 SMESH_SequenceOfNode myNodes; // nodes for using in sewing
184 * Create new node in the mesh with given coordinates
185 * (auxilary for advanced extrusion)
187 const SMDS_MeshNode* CreateNode(const double x,
190 const double tolnode,
191 SMESH_SequenceOfNode& aNodes);
194 * Generate new elements by extrusion of theElements
195 * It is a method used in .idl file. All functionality
196 * is implemented in the next method (see below) which
197 * is used in the cuurent method.
198 * param theElems - list of elements for extrusion
199 * param newElemsMap returns history of extrusion
200 * param theFlags set flags for performing extrusion (see description
201 * of enum ExtrusionFlags for additional information)
202 * param theTolerance - uses for comparing locations of nodes if flag
203 * EXTRUSION_FLAG_SEW is set
206 (map<int,const SMDS_MeshElement*> & theElems,
207 const gp_Vec& theStep,
208 const int theNbSteps,
209 TElemOfElemListMap& newElemsMap,
210 const int theFlags = EXTRUSION_FLAG_BOUNDARY,
211 const double theTolerance = 1.e-6);
214 * Generate new elements by extrusion of theElements
215 * param theElems - list of elements for extrusion
216 * param newElemsMap returns history of extrusion
217 * param theFlags set flags for performing extrusion (see description
218 * of enum ExtrusionFlags for additional information)
219 * param theTolerance - uses for comparing locations of nodes if flag
220 * EXTRUSION_FLAG_SEW is set
221 * param theParams - special structure for manage of extrusion
223 void ExtrusionSweep (map<int,const SMDS_MeshElement*> & theElems,
224 ExtrusParam& theParams,
225 TElemOfElemListMap& newElemsMap,
227 const double theTolerance);
230 // Generate new elements by extrusion of theElements
231 // by theStep by theNbSteps
233 enum Extrusion_Error {
238 EXTR_BAD_STARTING_NODE,
239 EXTR_BAD_ANGLES_NUMBER,
240 EXTR_CANT_GET_TANGENT
243 Extrusion_Error ExtrusionAlongTrack (std::map<int,const SMDS_MeshElement*> & theElements,
244 SMESH_subMesh* theTrackPattern,
245 const SMDS_MeshNode* theNodeStart,
246 const bool theHasAngles,
247 std::list<double>& theAngles,
248 const bool theHasRefPoint,
249 const gp_Pnt& theRefPoint);
250 // Generate new elements by extrusion of theElements along path given by theTrackPattern,
251 // theHasAngles are the rotation angles, base point can be given by theRefPoint
253 void Transform (std::map<int,const SMDS_MeshElement*> & theElements,
254 const gp_Trsf& theTrsf,
256 // Move or copy theElements applying theTrsf to their nodes
258 typedef std::list< std::list< const SMDS_MeshNode* > > TListOfListOfNodes;
260 void FindCoincidentNodes (std::set<const SMDS_MeshNode*> & theNodes,
261 const double theTolerance,
262 TListOfListOfNodes & theGroupsOfNodes);
263 // Return list of group of nodes close to each other within theTolerance.
264 // Search among theNodes or in the whole mesh if theNodes is empty.
266 int SimplifyFace (const vector<const SMDS_MeshNode *> faceNodes,
267 vector<const SMDS_MeshNode *>& poly_nodes,
268 vector<int>& quantities) const;
269 // Split face, defined by <faceNodes>, into several faces by repeating nodes.
270 // Is used by MergeNodes()
272 void MergeNodes (TListOfListOfNodes & theNodeGroups);
273 // In each group, the cdr of nodes are substituted by the first one
276 void MergeEqualElements();
277 // Remove all but one of elements built on the same nodes.
278 // Return nb of successfully merged groups.
280 static bool CheckFreeBorderNodes(const SMDS_MeshNode* theNode1,
281 const SMDS_MeshNode* theNode2,
282 const SMDS_MeshNode* theNode3 = 0);
283 // Return true if the three nodes are on a free border
287 // for SewFreeBorder()
288 SEW_BORDER1_NOT_FOUND,
289 SEW_BORDER2_NOT_FOUND,
290 SEW_BOTH_BORDERS_NOT_FOUND,
292 SEW_VOLUMES_TO_SPLIT,
293 // for SewSideElements()
294 SEW_DIFF_NB_OF_ELEMENTS,
295 SEW_TOPO_DIFF_SETS_OF_ELEMENTS,
301 Sew_Error SewFreeBorder (const SMDS_MeshNode* theBorderFirstNode,
302 const SMDS_MeshNode* theBorderSecondNode,
303 const SMDS_MeshNode* theBorderLastNode,
304 const SMDS_MeshNode* theSide2FirstNode,
305 const SMDS_MeshNode* theSide2SecondNode,
306 const SMDS_MeshNode* theSide2ThirdNode = 0,
307 const bool theSide2IsFreeBorder = true,
308 const bool toCreatePolygons = false,
309 const bool toCreatePolyedrs = false);
310 // Sew the free border to the side2 by replacing nodes in
311 // elements on the free border with nodes of the elements
312 // of the side 2. If nb of links in the free border and
313 // between theSide2FirstNode and theSide2LastNode are different,
314 // additional nodes are inserted on a link provided that no
315 // volume elements share the splitted link.
316 // The side 2 is a free border if theSide2IsFreeBorder == true.
317 // Sewing is peformed between the given first, second and last
318 // nodes on the sides.
319 // theBorderFirstNode is merged with theSide2FirstNode.
320 // if (!theSide2IsFreeBorder) then theSide2SecondNode gives
321 // the last node on the side 2, which will be merged with
322 // theBorderLastNode.
323 // if (theSide2IsFreeBorder) then theSide2SecondNode will
324 // be merged with theBorderSecondNode.
325 // if (theSide2IsFreeBorder && theSide2ThirdNode == 0) then
326 // the 2 free borders are sewn link by link and no additional
327 // nodes are inserted.
328 // Return false, if sewing failed.
330 Sew_Error SewSideElements (std::map<int,const SMDS_MeshElement*>& theSide1,
331 std::map<int,const SMDS_MeshElement*>& theSide2,
332 const SMDS_MeshNode* theFirstNode1ToMerge,
333 const SMDS_MeshNode* theFirstNode2ToMerge,
334 const SMDS_MeshNode* theSecondNode1ToMerge,
335 const SMDS_MeshNode* theSecondNode2ToMerge);
336 // Sew two sides of a mesh. Nodes belonging to theSide1 are
337 // merged with nodes of elements of theSide2.
338 // Number of elements in theSide1 and in theSide2 must be
339 // equal and they should have similar node connectivity.
340 // The nodes to merge should belong to side s borders and
341 // the first node should be linked to the second.
343 void InsertNodesIntoLink(const SMDS_MeshElement* theFace,
344 const SMDS_MeshNode* theBetweenNode1,
345 const SMDS_MeshNode* theBetweenNode2,
346 std::list<const SMDS_MeshNode*>& theNodesToInsert,
347 const bool toCreatePoly = false);
348 // insert theNodesToInsert into theFace between theBetweenNode1 and theBetweenNode2.
349 // If toCreatePoly is true, replace theFace by polygon, else split theFace.
351 void UpdateVolumes (const SMDS_MeshNode* theBetweenNode1,
352 const SMDS_MeshNode* theBetweenNode2,
353 std::list<const SMDS_MeshNode*>& theNodesToInsert);
354 // insert theNodesToInsert into all volumes, containing link
355 // theBetweenNode1 - theBetweenNode2, between theBetweenNode1 and theBetweenNode2.
357 void ConvertToQuadratic(const bool theForce3d);
358 //converts all mesh to quadratic one, deletes old elements, replacing
359 //them with quadratic ones with the same id.
361 bool ConvertFromQuadratic();
362 //converts all mesh from quadratic to ordinary ones, deletes old quadratic elements, replacing
363 //them with ordinary mesh elements with the same id.
366 // static int SortQuadNodes (const SMDS_Mesh * theMesh,
367 // int theNodeIds[] );
368 // // Set 4 nodes of a quadrangle face in a good order.
369 // // Swap 1<->2 or 2<->3 nodes and correspondingly return
372 // static bool SortHexaNodes (const SMDS_Mesh * theMesh,
373 // int theNodeIds[] );
374 // // Set 8 nodes of a hexahedron in a good order.
375 // // Return success status
377 static void AddToSameGroups (const SMDS_MeshElement* elemToAdd,
378 const SMDS_MeshElement* elemInGroups,
379 SMESHDS_Mesh * aMesh);
380 // Add elemToAdd to the groups the elemInGroups belongs to
382 static void RemoveElemFromGroups (const SMDS_MeshElement* removeelem,
383 SMESHDS_Mesh * aMesh);
384 // remove elemToAdd from the groups
386 static const SMDS_MeshElement*
387 FindFaceInSet(const SMDS_MeshNode* n1,
388 const SMDS_MeshNode* n2,
389 const std::map<int,const SMDS_MeshElement*>& elemSet,
390 const std::map<int,const SMDS_MeshElement*>& avoidSet);
391 // Return a face having linked nodes n1 and n2 and which is
392 // - not in avoidSet,
393 // - in elemSet provided that !elemSet.empty()
396 * \brief Returns true if given node is medium
397 * \param n - node to check
398 * \param typeToCheck - type of elements containing the node to ask about node status
399 * \retval bool - check result
401 static bool IsMedium(const SMDS_MeshNode* node,
402 const SMDSAbs_ElementType typeToCheck = SMDSAbs_All);
404 int FindShape (const SMDS_MeshElement * theElem);
405 // Return an index of the shape theElem is on
406 // or zero if a shape not found
408 SMESH_Mesh * GetMesh() { return myMesh; }
410 SMESHDS_Mesh * GetMeshDS() { return myMesh->GetMeshDS(); }
412 SMESH_SequenceOfElemPtr GetLastCreatedNodes() { return myLastCreatedNodes; }
414 SMESH_SequenceOfElemPtr GetLastCreatedElems() { return myLastCreatedElems; }
418 void ConvertElemToQuadratic(SMESHDS_SubMesh *theSm,
419 SMESH_MesherHelper* theHelper,
420 const bool theForce3d);
421 //Auxiliary function for "ConvertToQuadratic" is intended to convert
422 //elements contained in submesh to quadratic
424 void RemoveQuadElem( SMESHDS_SubMesh *theSm,
425 SMDS_ElemIteratorPtr theItr,
426 RemoveQuadNodeMap& theRemoveNodeMap);
427 //Auxiliary function for "ConvertFromQuadratic" is intended to convert quadratic
428 //element to ordinary and for removing quadratic nodes
435 * Sequence for keeping nodes created during last operation
437 SMESH_SequenceOfElemPtr myLastCreatedNodes;
440 * Sequence for keeping elements created during last operation
442 SMESH_SequenceOfElemPtr myLastCreatedElems;