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 : StdMeshers_Regular_1D.cxx
25 // Moved here from SMESH_Regular_1D.cxx
26 // Author : Paul RASCLE, EDF
32 #include "StdMeshers_Regular_1D.hxx"
33 #include "SMESH_Gen.hxx"
34 #include "SMESH_Mesh.hxx"
36 #include "StdMeshers_LocalLength.hxx"
37 #include "StdMeshers_NumberOfSegments.hxx"
38 #include "StdMeshers_Arithmetic1D.hxx"
39 #include "StdMeshers_StartEndLength.hxx"
40 #include "StdMeshers_Deflection1D.hxx"
42 #include "SMDS_MeshElement.hxx"
43 #include "SMDS_MeshNode.hxx"
44 #include "SMDS_EdgePosition.hxx"
45 #include "SMESH_subMesh.hxx"
47 #include "utilities.h"
49 #include <BRep_Tool.hxx>
50 #include <TopoDS_Edge.hxx>
51 #include <TopoDS_Shape.hxx>
52 #include <TopTools_ListIteratorOfListOfShape.hxx>
53 #include <GeomAdaptor_Curve.hxx>
54 #include <GCPnts_AbscissaPoint.hxx>
55 #include <GCPnts_UniformAbscissa.hxx>
56 #include <GCPnts_UniformDeflection.hxx>
57 #include <Standard_ErrorHandler.hxx>
58 #include <Precision.hxx>
61 //#include <algorithm>
63 //=============================================================================
67 //=============================================================================
69 StdMeshers_Regular_1D::StdMeshers_Regular_1D(int hypId, int studyId,
70 SMESH_Gen * gen):SMESH_1D_Algo(hypId, studyId, gen)
72 MESSAGE("StdMeshers_Regular_1D::StdMeshers_Regular_1D");
74 _shapeType = (1 << TopAbs_EDGE);
76 _compatibleHypothesis.push_back("LocalLength");
77 _compatibleHypothesis.push_back("NumberOfSegments");
78 _compatibleHypothesis.push_back("StartEndLength");
79 _compatibleHypothesis.push_back("Deflection1D");
80 _compatibleHypothesis.push_back("Arithmetic1D");
83 //=============================================================================
87 //=============================================================================
89 StdMeshers_Regular_1D::~StdMeshers_Regular_1D()
93 //=============================================================================
97 //=============================================================================
99 bool StdMeshers_Regular_1D::CheckHypothesis
101 const TopoDS_Shape& aShape,
102 SMESH_Hypothesis::Hypothesis_Status& aStatus)
106 const list <const SMESHDS_Hypothesis * >&hyps = GetUsedHypothesis(aMesh, aShape);
107 if (hyps.size() == 0)
109 aStatus = SMESH_Hypothesis::HYP_MISSING;
110 return false; // can't work without a hypothesis
113 // use only the first hypothesis
114 const SMESHDS_Hypothesis *theHyp = hyps.front();
116 string hypName = theHyp->GetName();
118 if (hypName == "LocalLength")
120 const StdMeshers_LocalLength * hyp =
121 dynamic_cast <const StdMeshers_LocalLength * >(theHyp);
123 _value[ BEG_LENGTH_IND ] = _value[ END_LENGTH_IND ] = hyp->GetLength();
124 ASSERT( _value[ BEG_LENGTH_IND ] > 0 );
125 _hypType = LOCAL_LENGTH;
126 aStatus = SMESH_Hypothesis::HYP_OK;
129 else if (hypName == "NumberOfSegments")
131 const StdMeshers_NumberOfSegments * hyp =
132 dynamic_cast <const StdMeshers_NumberOfSegments * >(theHyp);
134 _value[ NB_SEGMENTS_IND ] = hyp->GetNumberOfSegments();
135 _value[ SCALE_FACTOR_IND ] = hyp->GetScaleFactor();
136 ASSERT( _value[ NB_SEGMENTS_IND ] > 0 );
137 _hypType = NB_SEGMENTS;
138 aStatus = SMESH_Hypothesis::HYP_OK;
141 else if (hypName == "Arithmetic1D")
143 const StdMeshers_Arithmetic1D * hyp =
144 dynamic_cast <const StdMeshers_Arithmetic1D * >(theHyp);
146 _value[ BEG_LENGTH_IND ] = hyp->GetLength( true );
147 _value[ END_LENGTH_IND ] = hyp->GetLength( false );
148 ASSERT( _value[ BEG_LENGTH_IND ] > 0 && _value[ END_LENGTH_IND ] > 0 );
149 _hypType = ARITHMETIC_1D;
150 aStatus = SMESH_Hypothesis::HYP_OK;
153 else if (hypName == "StartEndLength")
155 const StdMeshers_StartEndLength * hyp =
156 dynamic_cast <const StdMeshers_StartEndLength * >(theHyp);
158 _value[ BEG_LENGTH_IND ] = hyp->GetLength( true );
159 _value[ END_LENGTH_IND ] = hyp->GetLength( false );
160 ASSERT( _value[ BEG_LENGTH_IND ] > 0 && _value[ END_LENGTH_IND ] > 0 );
161 _hypType = BEG_END_LENGTH;
162 aStatus = SMESH_Hypothesis::HYP_OK;
165 else if (hypName == "Deflection1D")
167 const StdMeshers_Deflection1D * hyp =
168 dynamic_cast <const StdMeshers_Deflection1D * >(theHyp);
170 _value[ DEFLECTION_IND ] = hyp->GetDeflection();
171 ASSERT( _value[ DEFLECTION_IND ] > 0 );
172 _hypType = DEFLECTION;
173 aStatus = SMESH_Hypothesis::HYP_OK;
176 aStatus = SMESH_Hypothesis::HYP_INCOMPATIBLE;
178 return ( _hypType != NONE );
181 //=============================================================================
185 //=============================================================================
186 bool StdMeshers_Regular_1D::computeInternalParameters(const TopoDS_Edge& theEdge,
187 list<double> & theParams) const
192 Handle(Geom_Curve) Curve = BRep_Tool::Curve(theEdge, f, l);
193 GeomAdaptor_Curve C3d(Curve);
195 double length = EdgeLength(theEdge);
204 if ( _hypType == LOCAL_LENGTH )
206 double nbseg = ceil(length / _value[ BEG_LENGTH_IND ]); // integer sup
208 nbseg = 1; // degenerated edge
209 eltSize = length / nbseg;
213 double epsilon = 0.001;
214 if (fabs(_value[ SCALE_FACTOR_IND ] - 1.0) > epsilon)
217 pow( _value[ SCALE_FACTOR_IND ], 1.0 / (_value[ NB_SEGMENTS_IND ] - 1));
219 length / (1 - pow( alpha,_value[ NB_SEGMENTS_IND ]));
221 int i, NbPoints = 1 + (int) _value[ NB_SEGMENTS_IND ];
222 for ( i = 2; i < NbPoints; i++ )
224 double param = factor * (1 - pow(alpha, i - 1));
225 theParams.push_back( param );
231 eltSize = length / _value[ NB_SEGMENTS_IND ];
235 GCPnts_UniformAbscissa Discret(C3d, eltSize, f, l);
236 if ( !Discret.IsDone() )
239 int NbPoints = Discret.NbPoints();
240 for ( int i = 2; i < NbPoints; i++ )
242 double param = Discret.Parameter(i);
243 theParams.push_back( param );
248 case BEG_END_LENGTH: {
250 // geometric progression: SUM(n) = ( a1 - an * q ) / ( 1 - q ) = length
252 double a1 = _value[ BEG_LENGTH_IND ];
253 double an = _value[ END_LENGTH_IND ];
254 double q = ( length - a1 ) / ( length - an );
256 double U1 = Min ( f, l );
257 double Un = Max ( f, l );
261 // computes a point on a curve <C3d> at the distance <eltSize>
262 // from the point of parameter <param>.
263 GCPnts_AbscissaPoint Discret( C3d, eltSize, param );
264 if ( !Discret.IsDone() ) break;
265 param = Discret.Parameter();
267 theParams.push_back( param );
272 if ( a1 + an < length ) {
274 double Ln = GCPnts_AbscissaPoint::Length( C3d, theParams.back(), Un );
275 double dLn = an - Ln;
276 if ( dLn < 0.5 * an )
279 theParams.pop_back();
280 Ln = GCPnts_AbscissaPoint::Length( C3d, theParams.back(), Un );
282 if ( dLn < 0.5 * an )
285 double dUn = dLn * ( Un - U1 ) / length;
289 list<double>::reverse_iterator itU = theParams.rbegin();
290 int i, n = theParams.size();
291 for ( i = 1 ; i < n; itU++, i++ ) {
302 GCPnts_UniformDeflection Discret(C3d, _value[ DEFLECTION_IND ], true);
303 if ( !Discret.IsDone() )
306 int NbPoints = Discret.NbPoints();
307 for ( int i = 2; i < NbPoints; i++ )
309 double param = Discret.Parameter(i);
310 theParams.push_back( param );
316 case ARITHMETIC_1D: {
317 // arithmetic progression: SUM(n) = ( an - a1 + q ) * ( a1 + an ) / ( 2 * q ) = length
319 double a1 = _value[ BEG_LENGTH_IND ];
320 double an = _value[ END_LENGTH_IND ];
322 double nd = (2 * length) / (an + a1) - 1;
327 double q = ((2 * length) / (n + 1) - 2 * a1) / n;
328 double U1 = Min ( f, l );
329 double Un = Max ( f, l );
336 // computes a point on a curve <C3d> at the distance <eltSize>
337 // from the point of parameter <param>.
338 GCPnts_AbscissaPoint Discret( C3d, eltSize, param );
339 if ( !Discret.IsDone() ) break;
340 param = Discret.Parameter();
341 if ( fabs(param - Un) > Precision::Confusion() && param < Un) {
342 theParams.push_back( param );
358 //=============================================================================
362 //=============================================================================
364 bool StdMeshers_Regular_1D::Compute(SMESH_Mesh & aMesh, const TopoDS_Shape & aShape)
366 MESSAGE("StdMeshers_Regular_1D::Compute");
368 if ( _hypType == NONE )
371 SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
372 aMesh.GetSubMesh(aShape);
374 const TopoDS_Edge & EE = TopoDS::Edge(aShape);
375 TopoDS_Edge E = TopoDS::Edge(EE.Oriented(TopAbs_FORWARD));
378 Handle(Geom_Curve) Curve = BRep_Tool::Curve(E, f, l);
380 TopoDS_Vertex VFirst, VLast;
381 TopExp::Vertices(E, VFirst, VLast); // Vfirst corresponds to f and Vlast to l
383 ASSERT(!VFirst.IsNull());
384 SMDS_NodeIteratorPtr lid= aMesh.GetSubMesh(VFirst)->GetSubMeshDS()->GetNodes();
387 MESSAGE (" NO NODE BUILT ON VERTEX ");
390 const SMDS_MeshNode * idFirst = lid->next();
392 ASSERT(!VLast.IsNull());
393 lid=aMesh.GetSubMesh(VLast)->GetSubMeshDS()->GetNodes();
396 MESSAGE (" NO NODE BUILT ON VERTEX ");
399 const SMDS_MeshNode * idLast = lid->next();
403 list< double > params;
405 if ( ! computeInternalParameters( E, params ))
408 catch ( Standard_Failure ) {
412 // edge extrema (indexes : 1 & NbPoints) already in SMDS (TopoDS_Vertex)
413 // only internal nodes receive an edge position with param on curve
415 const SMDS_MeshNode * idPrev = idFirst;
417 for (list<double>::iterator itU = params.begin(); itU != params.end(); itU++)
420 gp_Pnt P = Curve->Value(param);
422 //Add the Node in the DataStructure
423 SMDS_MeshNode * node = meshDS->AddNode(P.X(), P.Y(), P.Z());
424 meshDS->SetNodeOnEdge(node, E);
426 // **** edgePosition associe au point = param.
427 SMDS_EdgePosition* epos =
428 dynamic_cast<SMDS_EdgePosition *>(node->GetPosition().get());
429 epos->SetUParameter(param);
431 SMDS_MeshEdge * edge = meshDS->AddEdge(idPrev, node);
432 meshDS->SetMeshElementOnShape(edge, E);
435 SMDS_MeshEdge* edge = meshDS->AddEdge(idPrev, idLast);
436 meshDS->SetMeshElementOnShape(edge, E);
440 // Edge is a degenerated Edge : We put n = 5 points on the edge.
442 BRep_Tool::Range(E, f, l);
443 double du = (l - f) / (NbPoints - 1);
444 //MESSAGE("************* Degenerated edge! *****************");
446 TopoDS_Vertex V1, V2;
447 TopExp::Vertices(E, V1, V2);
448 gp_Pnt P = BRep_Tool::Pnt(V1);
450 const SMDS_MeshNode * idPrev = idFirst;
451 for (int i = 2; i < NbPoints; i++)
453 double param = f + (i - 1) * du;
454 SMDS_MeshNode * node = meshDS->AddNode(P.X(), P.Y(), P.Z());
455 meshDS->SetNodeOnEdge(node, E);
457 SMDS_EdgePosition* epos =
458 dynamic_cast<SMDS_EdgePosition*>(node->GetPosition().get());
459 epos->SetUParameter(param);
461 SMDS_MeshEdge * edge = meshDS->AddEdge(idPrev, node);
462 meshDS->SetMeshElementOnShape(edge, E);
465 SMDS_MeshEdge * edge = meshDS->AddEdge(idPrev, idLast);
466 meshDS->SetMeshElementOnShape(edge, E);
471 //=============================================================================
473 * See comments in SMESH_Algo.cxx
475 //=============================================================================
477 const list <const SMESHDS_Hypothesis *> & StdMeshers_Regular_1D::GetUsedHypothesis(
478 SMESH_Mesh & aMesh, const TopoDS_Shape & aShape)
480 _usedHypList.clear();
481 _usedHypList = GetAppliedHypothesis(aMesh, aShape); // copy
482 int nbHyp = _usedHypList.size();
485 // Check, if propagated from some other edge
486 TopoDS_Shape aMainEdge;
487 if (aShape.ShapeType() == TopAbs_EDGE &&
488 aMesh.IsPropagatedHypothesis(aShape, aMainEdge))
490 // Propagation of 1D hypothesis from <aMainEdge> on this edge
491 _usedHypList = GetAppliedHypothesis(aMesh, aMainEdge); // copy
492 nbHyp = _usedHypList.size();
497 TopTools_ListIteratorOfListOfShape ancIt( aMesh.GetAncestors( aShape ));
498 for (; ancIt.More(); ancIt.Next())
500 const TopoDS_Shape& ancestor = ancIt.Value();
501 _usedHypList = GetAppliedHypothesis(aMesh, ancestor); // copy
502 nbHyp = _usedHypList.size();
508 _usedHypList.clear(); //only one compatible hypothesis allowed
512 //=============================================================================
516 //=============================================================================
518 ostream & StdMeshers_Regular_1D::SaveTo(ostream & save)
523 //=============================================================================
527 //=============================================================================
529 istream & StdMeshers_Regular_1D::LoadFrom(istream & load)
534 //=============================================================================
538 //=============================================================================
540 ostream & operator <<(ostream & save, StdMeshers_Regular_1D & hyp)
542 return hyp.SaveTo( save );
545 //=============================================================================
549 //=============================================================================
551 istream & operator >>(istream & load, StdMeshers_Regular_1D & hyp)
553 return hyp.LoadFrom( load );