1 // SMESH SMESH : implementaion of SMESH idl descriptions
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_Algo.cxx
25 // Author : Paul RASCLE, EDF
30 #include "SMESH_Algo.hxx"
31 #include "SMESH_Gen.hxx"
32 #include "SMESH_Mesh.hxx"
33 #include "SMESH_HypoFilter.hxx"
34 #include "SMDS_FacePosition.hxx"
35 #include "SMDS_EdgePosition.hxx"
36 #include "SMDS_MeshElement.hxx"
37 #include "SMDS_MeshNode.hxx"
38 #include "SMESHDS_Mesh.hxx"
39 #include "SMESHDS_SubMesh.hxx"
41 #include <BRep_Tool.hxx>
42 #include <GCPnts_AbscissaPoint.hxx>
43 #include <GeomAdaptor_Curve.hxx>
44 #include <Geom_Surface.hxx>
45 #include <TopLoc_Location.hxx>
46 #include <TopTools_ListIteratorOfListOfShape.hxx>
47 #include <TopTools_ListOfShape.hxx>
49 #include <TopoDS_Face.hxx>
51 #include <gp_Pnt2d.hxx>
54 #include "utilities.h"
58 //=============================================================================
62 //=============================================================================
64 SMESH_Algo::SMESH_Algo(int hypId, int studyId,
65 SMESH_Gen * gen):SMESH_Hypothesis(hypId, studyId, gen)
67 // _compatibleHypothesis.push_back("hypothese_bidon");
69 gen->_mapAlgo[hypId] = this;
71 _onlyUnaryInput = _requireDescretBoundary = true;
72 _quadraticMesh = false;
75 //=============================================================================
79 //=============================================================================
81 SMESH_Algo::~SMESH_Algo()
85 //=============================================================================
89 //=============================================================================
91 const vector < string > &SMESH_Algo::GetCompatibleHypothesis()
93 return _compatibleHypothesis;
96 //=============================================================================
98 * List the hypothesis used by the algorithm associated to the shape.
99 * Hypothesis associated to father shape -are- taken into account (see
100 * GetAppliedHypothesis). Relevant hypothesis have a name (type) listed in
101 * the algorithm. This method could be surcharged by specific algorithms, in
102 * case of several hypothesis simultaneously applicable.
104 //=============================================================================
106 const list <const SMESHDS_Hypothesis *> &
107 SMESH_Algo::GetUsedHypothesis(SMESH_Mesh & aMesh,
108 const TopoDS_Shape & aShape,
109 const bool ignoreAuxiliary)
111 _usedHypList.clear();
112 SMESH_HypoFilter filter;
113 if ( InitCompatibleHypoFilter( filter, ignoreAuxiliary ))
115 aMesh.GetHypotheses( aShape, filter, _usedHypList, true );
116 if ( ignoreAuxiliary && _usedHypList.size() > 1 )
117 _usedHypList.clear(); //only one compatible hypothesis allowed
122 //=============================================================================
124 * List the relevant hypothesis associated to the shape. Relevant hypothesis
125 * have a name (type) listed in the algorithm. Hypothesis associated to
126 * father shape -are not- taken into account (see GetUsedHypothesis)
128 //=============================================================================
130 const list<const SMESHDS_Hypothesis *> &
131 SMESH_Algo::GetAppliedHypothesis(SMESH_Mesh & aMesh,
132 const TopoDS_Shape & aShape,
133 const bool ignoreAuxiliary)
135 _appliedHypList.clear();
136 SMESH_HypoFilter filter;
137 if ( InitCompatibleHypoFilter( filter, ignoreAuxiliary ))
138 aMesh.GetHypotheses( aShape, filter, _appliedHypList, false );
140 return _appliedHypList;
143 //=============================================================================
145 * Compute length of an edge
147 //=============================================================================
149 double SMESH_Algo::EdgeLength(const TopoDS_Edge & E)
151 double UMin = 0, UMax = 0;
152 if (BRep_Tool::Degenerated(E))
155 Handle(Geom_Curve) C = BRep_Tool::Curve(E, L, UMin, UMax);
156 GeomAdaptor_Curve AdaptCurve(C);
157 GCPnts_AbscissaPoint gabs;
158 double length = gabs.Length(AdaptCurve, UMin, UMax);
162 //================================================================================
164 * \brief Find out elements orientation on a geometrical face
165 * \param theFace - The face correctly oriented in the shape being meshed
166 * \param theMeshDS - The mesh data structure
167 * \retval bool - true if the face normal and the normal of first element
168 * in the correspoding submesh point in different directions
170 //================================================================================
172 bool SMESH_Algo::IsReversedSubMesh (const TopoDS_Face& theFace,
173 SMESHDS_Mesh* theMeshDS)
175 if ( theFace.IsNull() || !theMeshDS )
178 // find out orientation of a meshed face
179 int faceID = theMeshDS->ShapeToIndex( theFace );
180 TopoDS_Shape aMeshedFace = theMeshDS->IndexToShape( faceID );
181 bool isReversed = ( theFace.Orientation() != aMeshedFace.Orientation() );
183 const SMESHDS_SubMesh * aSubMeshDSFace = theMeshDS->MeshElements( faceID );
184 if ( !aSubMeshDSFace )
187 // find element with node located on face and get its normal
188 const SMDS_FacePosition* facePos = 0;
192 bool normalOK = false;
193 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
194 while ( iteratorElem->more() ) // loop on elements on theFace
196 const SMDS_MeshElement* elem = iteratorElem->next();
197 if ( elem && elem->NbNodes() > 2 ) {
198 SMDS_ElemIteratorPtr nodesIt = elem->nodesIterator();
199 const SMDS_FacePosition* fPos = 0;
201 while ( nodesIt->more() ) { // loop on nodes
202 const SMDS_MeshNode* node
203 = static_cast<const SMDS_MeshNode *>(nodesIt->next());
205 nPnt[ i++ ].SetCoord( node->X(), node->Y(), node->Z() );
207 const SMDS_PositionPtr& pos = node->GetPosition();
208 if ( !pos ) continue;
209 if ( pos->GetTypeOfPosition() == SMDS_TOP_FACE ) {
210 fPos = dynamic_cast< const SMDS_FacePosition* >( pos.get() );
212 else if ( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX ) {
213 vID = pos->GetShapeId();
216 if ( fPos || ( !normalOK && vID )) {
218 gp_Vec v01( nPnt[0], nPnt[1] ), v02( nPnt[0], nPnt[2] );
219 if ( v01.SquareMagnitude() > RealSmall() &&
220 v02.SquareMagnitude() > RealSmall() )
223 normalOK = ( Ne.SquareMagnitude() > RealSmall() );
225 // we need position on theFace or at least on vertex
228 if ((facePos = fPos))
237 // node position on face
240 u = facePos->GetUParameter();
241 v = facePos->GetVParameter();
243 else if ( vertexID ) {
244 TopoDS_Shape V = theMeshDS->IndexToShape( vertexID );
245 if ( V.IsNull() || V.ShapeType() != TopAbs_VERTEX )
247 gp_Pnt2d uv = BRep_Tool::Parameters( TopoDS::Vertex( V ), theFace );
256 // face normal at node position
258 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace, loc );
259 if ( surf.IsNull() || surf->Continuity() < GeomAbs_C1 ) return isReversed;
261 surf->D1( u, v, nPnt[0], d1u, d1v );
262 gp_Vec Nf = (d1u ^ d1v).Transformed( loc );
264 if ( theFace.Orientation() == TopAbs_REVERSED )
270 //================================================================================
272 * \brief Initialize my parameter values by the mesh built on the geometry
273 * \param theMesh - the built mesh
274 * \param theShape - the geometry of interest
275 * \retval bool - true if parameter values have been successfully defined
277 * Just return false as the algorithm does not hold parameters values
279 //================================================================================
281 bool SMESH_Algo::SetParametersByMesh(const SMESH_Mesh* /*theMesh*/,
282 const TopoDS_Shape& /*theShape*/)
287 //================================================================================
289 * \brief Fill vector of node parameters on geometrical edge, including vertex nodes
290 * \param theMesh - The mesh containing nodes
291 * \param theEdge - The geometrical edge of interest
292 * \param theParams - The resulting vector of sorted node parameters
293 * \retval bool - false if not all parameters are OK
295 //================================================================================
297 bool SMESH_Algo::GetNodeParamOnEdge(const SMESHDS_Mesh* theMesh,
298 const TopoDS_Edge& theEdge,
299 vector< double > & theParams)
303 if ( !theMesh || theEdge.IsNull() )
306 SMESHDS_SubMesh * eSubMesh = theMesh->MeshElements( theEdge );
307 if ( !eSubMesh || !eSubMesh->GetElements()->more() )
308 return false; // edge is not meshed
311 set < double > paramSet;
314 // loop on nodes of an edge: sort them by param on edge
315 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
316 while ( nIt->more() )
318 const SMDS_MeshNode* node = nIt->next();
319 const SMDS_PositionPtr& pos = node->GetPosition();
320 if ( pos->GetTypeOfPosition() != SMDS_TOP_EDGE )
322 const SMDS_EdgePosition* epos =
323 static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
324 paramSet.insert( epos->GetUParameter() );
328 // add vertex nodes params
330 BRep_Tool::Range(theEdge, f, l);
331 paramSet.insert( f );
332 paramSet.insert( l );
333 if ( paramSet.size() != nbEdgeNodes + 2 )
334 return false; // there are equal parameters
337 theParams.resize( paramSet.size() );
338 set < double >::iterator par = paramSet.begin();
339 vector< double >::iterator vecPar = theParams.begin();
340 for ( ; par != paramSet.end(); ++par, ++vecPar )
343 return theParams.size() > 1;
346 //================================================================================
348 * \brief Make filter recognize only compatible hypotheses
349 * \param theFilter - the filter to initialize
350 * \param ignoreAuxiliary - make filter ignore compatible auxiliary hypotheses
352 //================================================================================
354 bool SMESH_Algo::InitCompatibleHypoFilter( SMESH_HypoFilter & theFilter,
355 const bool ignoreAuxiliary) const
357 if ( !_compatibleHypothesis.empty() )
359 theFilter.Init( theFilter.HasName( _compatibleHypothesis[0] ));
360 for ( int i = 1; i < _compatibleHypothesis.size(); ++i )
361 theFilter.Or( theFilter.HasName( _compatibleHypothesis[ i ] ));
363 if ( ignoreAuxiliary )
364 theFilter.AndNot( theFilter.IsAuxiliary() );