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 enum Extrusion_Error {
130 EXTR_BAD_STARTING_NODE,
131 EXTR_BAD_ANGLES_NUMBER,
132 EXTR_CANT_GET_TANGENT
135 Extrusion_Error ExtrusionAlongTrack (std::set<const SMDS_MeshElement*> & theElements,
136 SMESH_subMesh* theTrackPattern,
137 const SMDS_MeshNode* theNodeStart,
138 const bool theHasAngles,
139 std::list<double>& theAngles,
140 const bool theHasRefPoint,
141 const gp_Pnt& theRefPoint);
142 // Generate new elements by extrusion of theElements along path given by theTrackPattern,
143 // theHasAngles are the rotation angles, base point can be given by theRefPoint
145 void Transform (std::set<const SMDS_MeshElement*> & theElements,
146 const gp_Trsf& theTrsf,
148 // Move or copy theElements applying theTrsf to their nodes
150 typedef std::list< std::list< const SMDS_MeshNode* > > TListOfListOfNodes;
152 void FindCoincidentNodes (std::set<const SMDS_MeshNode*> & theNodes,
153 const double theTolerance,
154 TListOfListOfNodes & theGroupsOfNodes);
155 // Return list of group of nodes close to each other within theTolerance.
156 // Search among theNodes or in the whole mesh if theNodes is empty.
158 void MergeNodes (TListOfListOfNodes & theNodeGroups);
159 // In each group, the cdr of nodes are substituted by the first one
162 void MergeEqualElements();
163 // Remove all but one of elements built on the same nodes.
164 // Return nb of successfully merged groups.
166 static bool CheckFreeBorderNodes(const SMDS_MeshNode* theNode1,
167 const SMDS_MeshNode* theNode2,
168 const SMDS_MeshNode* theNode3 = 0);
169 // Return true if the three nodes are on a free border
173 // for SewFreeBorder()
174 SEW_BORDER1_NOT_FOUND,
175 SEW_BORDER2_NOT_FOUND,
176 SEW_BOTH_BORDERS_NOT_FOUND,
178 SEW_VOLUMES_TO_SPLIT,
179 // for SewSideElements()
180 SEW_DIFF_NB_OF_ELEMENTS,
181 SEW_TOPO_DIFF_SETS_OF_ELEMENTS,
187 Sew_Error SewFreeBorder (const SMDS_MeshNode* theBorderFirstNode,
188 const SMDS_MeshNode* theBorderSecondNode,
189 const SMDS_MeshNode* theBorderLastNode,
190 const SMDS_MeshNode* theSide2FirstNode,
191 const SMDS_MeshNode* theSide2SecondNode,
192 const SMDS_MeshNode* theSide2ThirdNode = 0,
193 bool theSide2IsFreeBorder = true);
194 // Sew the free border to the side2 by replacing nodes in
195 // elements on the free border with nodes of the elements
196 // of the side 2. If nb of links in the free border and
197 // between theSide2FirstNode and theSide2LastNode are different,
198 // additional nodes are inserted on a link provided that no
199 // volume elements share the splitted link.
200 // The side 2 is a free border if theSide2IsFreeBorder == true.
201 // Sewing is peformed between the given first, second and last
202 // nodes on the sides.
203 // theBorderFirstNode is merged with theSide2FirstNode.
204 // if (!theSide2IsFreeBorder) then theSide2SecondNode gives
205 // the last node on the side 2, which will be merged with
206 // theBorderLastNode.
207 // if (theSide2IsFreeBorder) then theSide2SecondNode will
208 // be merged with theBorderSecondNode.
209 // if (theSide2IsFreeBorder && theSide2ThirdNode == 0) then
210 // the 2 free borders are sewn link by link and no additional
211 // nodes are inserted.
212 // Return false, if sewing failed.
214 Sew_Error SewSideElements (std::set<const SMDS_MeshElement*>& theSide1,
215 std::set<const SMDS_MeshElement*>& theSide2,
216 const SMDS_MeshNode* theFirstNode1ToMerge,
217 const SMDS_MeshNode* theFirstNode2ToMerge,
218 const SMDS_MeshNode* theSecondNode1ToMerge,
219 const SMDS_MeshNode* theSecondNode2ToMerge);
220 // Sew two sides of a mesh. Nodes belonging to theSide1 are
221 // merged with nodes of elements of theSide2.
222 // Number of elements in theSide1 and in theSide2 must be
223 // equal and they should have similar node connectivity.
224 // The nodes to merge should belong to side s borders and
225 // the first node should be linked to the second.
227 void InsertNodesIntoLink(const SMDS_MeshElement* theFace,
228 const SMDS_MeshNode* theBetweenNode1,
229 const SMDS_MeshNode* theBetweenNode2,
230 std::list<const SMDS_MeshNode*>& theNodesToInsert);
231 // insert theNodesToInsert into theFace between theBetweenNode1
232 // and theBetweenNode2 and split theElement.
234 static int SortQuadNodes (const SMDS_Mesh * theMesh,
236 // Set 4 nodes of a quadrangle face in a good order.
237 // Swap 1<->2 or 2<->3 nodes and correspondingly return
240 static bool SortHexaNodes (const SMDS_Mesh * theMesh,
242 // Set 8 nodes of a hexahedron in a good order.
243 // Return success status
245 static void AddToSameGroups (const SMDS_MeshElement* elemToAdd,
246 const SMDS_MeshElement* elemInGroups,
247 SMESHDS_Mesh * aMesh);
248 // Add elemToAdd to the groups the elemInGroups belongs to
250 static const SMDS_MeshElement*
251 FindFaceInSet(const SMDS_MeshNode* n1,
252 const SMDS_MeshNode* n2,
253 const std::set<const SMDS_MeshElement*>& elemSet,
254 const std::set<const SMDS_MeshElement*>& avoidSet);
255 // Return a face having linked nodes n1 and n2 and which is
256 // - not in avoidSet,
257 // - in elemSet provided that !elemSet.empty()
259 int FindShape (const SMDS_MeshElement * theElem);
260 // Return an index of the shape theElem is on
261 // or zero if a shape not found
264 SMESH_Mesh * GetMesh() { return myMesh; }
266 SMESHDS_Mesh * GetMeshDS() { return myMesh->GetMeshDS(); }