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.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
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"
39 class SMDS_MeshElement;
46 class SMESH_MeshEditor {
49 SMESH_MeshEditor( SMESH_Mesh* theMesh );
51 bool Remove (const std::list< int >& theElemIDs, const bool isNodes);
52 // Remove a node or an element.
53 // Modify a compute state of sub-meshes which become empty
55 bool InverseDiag (const SMDS_MeshElement * theTria1,
56 const SMDS_MeshElement * theTria2 );
57 // Replace two neighbour triangles with ones built on the same 4 nodes
58 // but having other common link.
59 // Return False if args are improper
61 bool InverseDiag (const SMDS_MeshNode * theNode1,
62 const SMDS_MeshNode * theNode2 );
63 // Replace two neighbour triangles sharing theNode1-theNode2 link
64 // with ones built on the same 4 nodes but having other common link.
65 // Return false if proper faces not found
67 bool DeleteDiag (const SMDS_MeshNode * theNode1,
68 const SMDS_MeshNode * theNode2 );
69 // Replace two neighbour triangles sharing theNode1-theNode2 link
70 // with a quadrangle built on the same 4 nodes.
71 // Return false if proper faces not found
73 bool Reorient (const SMDS_MeshElement * theFace);
74 // Reverse the normal of theFace
75 // Return false if theFace is null
78 bool TriToQuad (std::set<const SMDS_MeshElement*> & theElems,
79 SMESH::Controls::NumericalFunctorPtr theCriterion,
80 const double theMaxAngle);
81 // Fuse neighbour triangles into quadrangles.
82 // theCriterion is used to choose a neighbour to fuse with.
83 // theMaxAngle is a max angle between element normals at which
84 // fusion is still performed; theMaxAngle is mesured in radians.
86 bool QuadToTri (std::set<const SMDS_MeshElement*> & theElems,
87 SMESH::Controls::NumericalFunctorPtr theCriterion);
88 // Cut quadrangles into triangles.
89 // theCriterion is used to choose a diagonal to cut
91 bool QuadToTri (std::set<const SMDS_MeshElement*> & theElems,
92 const bool the13Diag);
93 // Cut quadrangles into triangles
96 enum SmoothMethod { LAPLACIAN = 0, CENTROIDAL };
98 void Smooth (std::set<const SMDS_MeshElement*> & theElements,
99 std::set<const SMDS_MeshNode*> & theFixedNodes,
100 const SmoothMethod theSmoothMethod,
101 const int theNbIterations,
102 double theTgtAspectRatio = 1.0);
103 // Smooth theElements using theSmoothMethod during theNbIterations
104 // or until a worst element has aspect ratio <= theTgtAspectRatio.
105 // Aspect Ratio varies in range [1.0, inf].
106 // If theElements is empty, the whole mesh is smoothed.
107 // theFixedNodes contains additionally fixed nodes. Nodes built
108 // on edges and boundary nodes are always fixed.
111 void RotationSweep (std::set<const SMDS_MeshElement*> & theElements,
112 const gp_Ax1& theAxis,
113 const double theAngle,
114 const int theNbSteps,
115 const double theToler);
116 // Generate new elements by rotation of theElements around theAxis
117 // by theAngle by theNbSteps
119 void ExtrusionSweep (std::set<const SMDS_MeshElement*> & theElements,
120 const gp_Vec& theStep,
121 const int theNbSteps);
122 // Generate new elements by extrusion of theElements
123 // by theStep by theNbSteps
125 int ExtrusionAlongTrack (std::set<const SMDS_MeshElement*> & theElements,
126 SMESH_subMesh* theTrackPattern,
127 const SMDS_MeshNode* theNodeStart,
128 const bool theHasAngles,
129 std::list<double>& theAngles,
130 const bool theHasRefPoint,
131 const gp_Pnt& theRefPoint);
132 // Generate new elements by extrusion of theElements along path given by theTrackPattern,
133 // theHasAngles are the rotation angles, base point can be given by theRefPoint
135 void Transform (std::set<const SMDS_MeshElement*> & theElements,
136 const gp_Trsf& theTrsf,
138 // Move or copy theElements applying theTrsf to their nodes
140 typedef std::list< std::list< const SMDS_MeshNode* > > TListOfListOfNodes;
142 void FindCoincidentNodes (std::set<const SMDS_MeshNode*> & theNodes,
143 const double theTolerance,
144 TListOfListOfNodes & theGroupsOfNodes);
145 // Return list of group of nodes close to each other within theTolerance.
146 // Search among theNodes or in the whole mesh if theNodes is empty.
148 void MergeNodes (TListOfListOfNodes & theNodeGroups);
149 // In each group, the cdr of nodes are substituted by the first one
152 void MergeEqualElements();
153 // Remove all but one of elements built on the same nodes.
154 // Return nb of successfully merged groups.
156 static bool CheckFreeBorderNodes(const SMDS_MeshNode* theNode1,
157 const SMDS_MeshNode* theNode2,
158 const SMDS_MeshNode* theNode3 = 0);
159 // Return true if the three nodes are on a free border
163 // for SewFreeBorder()
164 SEW_BORDER1_NOT_FOUND,
165 SEW_BORDER2_NOT_FOUND,
166 SEW_BOTH_BORDERS_NOT_FOUND,
168 SEW_VOLUMES_TO_SPLIT,
169 // for SewSideElements()
170 SEW_DIFF_NB_OF_ELEMENTS,
171 SEW_TOPO_DIFF_SETS_OF_ELEMENTS,
177 Sew_Error SewFreeBorder (const SMDS_MeshNode* theBorderFirstNode,
178 const SMDS_MeshNode* theBorderSecondNode,
179 const SMDS_MeshNode* theBorderLastNode,
180 const SMDS_MeshNode* theSide2FirstNode,
181 const SMDS_MeshNode* theSide2SecondNode,
182 const SMDS_MeshNode* theSide2ThirdNode = 0,
183 bool theSide2IsFreeBorder = true);
184 // Sew the free border to the side2 by replacing nodes in
185 // elements on the free border with nodes of the elements
186 // of the side 2. If nb of links in the free border and
187 // between theSide2FirstNode and theSide2LastNode are different,
188 // additional nodes are inserted on a link provided that no
189 // volume elements share the splitted link.
190 // The side 2 is a free border if theSide2IsFreeBorder == true.
191 // Sewing is peformed between the given first, second and last
192 // nodes on the sides.
193 // theBorderFirstNode is merged with theSide2FirstNode.
194 // if (!theSide2IsFreeBorder) then theSide2SecondNode gives
195 // the last node on the side 2, which will be merged with
196 // theBorderLastNode.
197 // if (theSide2IsFreeBorder) then theSide2SecondNode will
198 // be merged with theBorderSecondNode.
199 // if (theSide2IsFreeBorder && theSide2ThirdNode == 0) then
200 // the 2 free borders are sewn link by link and no additional
201 // nodes are inserted.
202 // Return false, if sewing failed.
204 Sew_Error SewSideElements (std::set<const SMDS_MeshElement*>& theSide1,
205 std::set<const SMDS_MeshElement*>& theSide2,
206 const SMDS_MeshNode* theFirstNode1ToMerge,
207 const SMDS_MeshNode* theFirstNode2ToMerge,
208 const SMDS_MeshNode* theSecondNode1ToMerge,
209 const SMDS_MeshNode* theSecondNode2ToMerge);
210 // Sew two sides of a mesh. Nodes belonging to theSide1 are
211 // merged with nodes of elements of theSide2.
212 // Number of elements in theSide1 and in theSide2 must be
213 // equal and they should have similar node connectivity.
214 // The nodes to merge should belong to side s borders and
215 // the first node should be linked to the second.
217 void InsertNodesIntoLink(const SMDS_MeshElement* theFace,
218 const SMDS_MeshNode* theBetweenNode1,
219 const SMDS_MeshNode* theBetweenNode2,
220 std::list<const SMDS_MeshNode*>& theNodesToInsert);
221 // insert theNodesToInsert into theFace between theBetweenNode1
222 // and theBetweenNode2 and split theElement.
224 static int SortQuadNodes (const SMDS_Mesh * theMesh,
226 // Set 4 nodes of a quadrangle face in a good order.
227 // Swap 1<->2 or 2<->3 nodes and correspondingly return
230 static bool SortHexaNodes (const SMDS_Mesh * theMesh,
232 // Set 8 nodes of a hexahedron in a good order.
233 // Return success status
235 static void AddToSameGroups (const SMDS_MeshElement* elemToAdd,
236 const SMDS_MeshElement* elemInGroups,
237 SMESHDS_Mesh * aMesh);
238 // Add elemToAdd to the groups the elemInGroups belongs to
240 static const SMDS_MeshElement*
241 FindFaceInSet(const SMDS_MeshNode* n1,
242 const SMDS_MeshNode* n2,
243 const std::set<const SMDS_MeshElement*>& elemSet,
244 const std::set<const SMDS_MeshElement*>& avoidSet);
245 // Return a face having linked nodes n1 and n2 and which is
246 // - not in avoidSet,
247 // - in elemSet provided that !elemSet.empty()
249 int FindShape (const SMDS_MeshElement * theElem);
250 // Return an index of the shape theElem is on
251 // or zero if a shape not found
254 SMESH_Mesh * GetMesh() { return myMesh; }
256 SMESHDS_Mesh * GetMeshDS() { return myMesh->GetMeshDS(); }