-// Copyright (C) 2007-2013 CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2014 CEA/DEN, EDF R&D, OPEN CASCADE
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
-// version 2.1 of the License.
+// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
_hypMaxElementArea = 0;
_hypLengthFromEdges = 0;
_hypQuadranglePreference = 0;
+ _hypParameters = 0;
+ _progressByTic = -1;
const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape, false);
bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
const TopoDS_Shape& aShape)
{
-#ifdef WITH_SMESH_CANCEL_COMPUTE
netgen::multithread.terminate = 0;
-#endif
- MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::Compute()");
+ netgen::multithread.task = "Surface meshing";
SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
int faceID = meshDS->ShapeToIndex( aShape );
_quadraticMesh = helper.IsQuadraticSubMesh(aShape);
helper.SetElementsOnShape( true );
const bool ignoreMediumNodes = _quadraticMesh;
-
+
// build viscous layers if required
- const TopoDS_Face F = TopoDS::Face( aShape/*.Oriented( TopAbs_FORWARD )*/);
+ TopoDS_Face F = TopoDS::Face( aShape/*.Oriented( TopAbs_FORWARD )*/);
+ if ( F.Orientation() != TopAbs_FORWARD &&
+ F.Orientation() != TopAbs_REVERSED )
+ F.Orientation( TopAbs_FORWARD ); // avoid pb with TopAbs_INTERNAL
SMESH_ProxyMesh::Ptr proxyMesh = StdMeshers_ViscousLayers2D::Compute( aMesh, F );
if ( !proxyMesh )
return false;
else
{
double edgeLength = 0;
- if (_hypLengthFromEdges || (!_hypLengthFromEdges && !_hypMaxElementArea))
+ if (_hypLengthFromEdges /*|| (!_hypLengthFromEdges && !_hypMaxElementArea)*/)
{
int nbSegments = 0;
for ( int iW = 0; iW < nbWires; ++iW )
if ( nbSegments )
edgeLength /= nbSegments;
}
- if ( _hypMaxElementArea )
+ else if ( _hypMaxElementArea )
{
double maxArea = _hypMaxElementArea->GetMaxArea();
edgeLength = sqrt(2. * maxArea/sqrt(3.0));
}
+ else
+ {
+ // set edgeLength by a longest segment
+ double maxSeg2 = 0;
+ for ( int iW = 0; iW < nbWires; ++iW )
+ {
+ const UVPtStructVec& points = wires[ iW ]->GetUVPtStruct();
+ gp_Pnt pPrev = SMESH_TNodeXYZ( points[0].node );
+ for ( size_t i = 1; i < points.size(); ++i )
+ {
+ gp_Pnt p = SMESH_TNodeXYZ( points[i].node );
+ maxSeg2 = Max( maxSeg2, p.SquareDistance( pPrev ));
+ pPrev = p;
+ }
+ }
+ edgeLength = sqrt( maxSeg2 ) * 1.05;
+ }
if ( edgeLength < DBL_MIN )
edgeLength = occgeo.GetBoundingBox().Diam();
netgen::mparam.maxh = edgeLength;
netgen::mparam.minh = aMesher.GetDefaultMinSize( aShape, netgen::mparam.maxh );
netgen::mparam.quad = _hypQuadranglePreference ? 1 : 0;
- netgen::mparam.grading = 0.7; // very coarse mesh by default
+ netgen::mparam.grading = 0.4; // Moderate fineness by default
}
occgeo.face_maxh = netgen::mparam.maxh;
// Make input netgen mesh
// -------------------------
- NETGENPlugin_NetgenLibWrapper ngLib;
- netgen::Mesh * ngMesh = (netgen::Mesh*) ngLib._ngMesh;
-
- Box<3> bb = occgeo.GetBoundingBox();
- bb.Increase (bb.Diam()/10);
- ngMesh->SetLocalH (bb.PMin(), bb.PMax(), netgen::mparam.grading);
- ngMesh->SetGlobalH (netgen::mparam.maxh);
+ // MESHCONST_ANALYSE step may lead to a failure, so we make an attempt
+ // w/o MESHCONST_ANALYSE at the second loop
+ int err = 1;
+ int iLoop = netgen::mparam.uselocalh ? 0 : 1; // uselocalh depends on
+ for ( ; iLoop < 2; iLoop++ )
+ {
+ bool isMESHCONST_ANALYSE = false;
+ InitComputeError();
- vector< const SMDS_MeshNode* > nodeVec;
- problem = aMesher.AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
- if ( problem && !problem->IsOK() )
- return error( problem );
-
- // -------------------------
- // Generate surface mesh
- // -------------------------
+ NETGENPlugin_NetgenLibWrapper ngLib;
+ netgen::Mesh * ngMesh = (netgen::Mesh*) ngLib._ngMesh;
+ ngLib._isComputeOk = false;
#ifndef NETGEN_V5
- char *optstr = 0;
+ char *optstr = 0;
#endif
- int startWith = MESHCONST_MESHSURFACE;
- int endWith = MESHCONST_OPTSURFACE;
- int err = 1;
+ int startWith = MESHCONST_ANALYSE;
+ int endWith = MESHCONST_ANALYSE;
- try {
-#if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
- OCC_CATCH_SIGNALS;
-#endif
+ if ( !_hypLengthFromEdges && !_hypMaxElementArea && iLoop == 0 )
+ {
+ isMESHCONST_ANALYSE = true;
#ifdef NETGEN_V5
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
#else
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
-#endif
-#ifdef WITH_SMESH_CANCEL_COMPUTE
- if(netgen::multithread.terminate)
- return false;
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
#endif
- if ( err )
- error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
- }
- catch (Standard_Failure& ex)
- {
- SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
- str << " at " << netgen::multithread.task
- << ": " << ex.DynamicType()->Name();
- if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
- str << ": " << ex.GetMessageString();
- error(str);
- }
- catch (...) {
- SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
- str << " at " << netgen::multithread.task;
- error(str);
- }
+ ngLib._ngMesh = 0;
+ ngLib.setMesh(( nglib::Ng_Mesh*) ngMesh );
+ }
+ else
+ {
+ Box<3> bb = occgeo.GetBoundingBox();
+ bb.Increase (bb.Diam()/10);
+ ngMesh->SetLocalH (bb.PMin(), bb.PMax(), netgen::mparam.grading);
+ ngMesh->SetGlobalH (netgen::mparam.maxh);
+ }
+ //cerr << "max " << netgen::mparam.maxh << " min " << netgen::mparam.minh << endl;
- // ----------------------------------------------------
- // Fill the SMESHDS with the generated nodes and faces
- // ----------------------------------------------------
+ vector< const SMDS_MeshNode* > nodeVec;
+ problem = aMesher.AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
+ if ( problem && !problem->IsOK() )
+ return error( problem );
- int nbNodes = ngMesh->GetNP();
- int nbFaces = ngMesh->GetNSE();
+ if ( iLoop == 0 )
+ {
+ // limit element size near existing segments
+ TopTools_IndexedMapOfShape edgeMap;
+ PShapeIteratorPtr solidIt = helper.GetAncestors( F, aMesh, TopAbs_SOLID );
+ while ( const TopoDS_Shape* solid = solidIt->next() )
+ {
+ TopExp_Explorer eExp( *solid, TopAbs_EDGE );
+ for ( ; eExp.More(); eExp.Next() )
+ {
+ const TopoDS_Shape& edge = eExp.Current();
+ if (( SMESH_Algo::isDegenerated( TopoDS::Edge( edge ))) ||
+ ( helper.IsSubShape( edge, aShape )) ||
+ ( !edgeMap.Add( edge )))
+ continue;
+ SMESHDS_SubMesh* smDS = aMesh.GetMeshDS()->MeshElements( edge );
+ if ( !smDS ) continue;
+ SMDS_ElemIteratorPtr segIt = smDS->GetElements();
+ while ( segIt->more() )
+ {
+ const SMDS_MeshElement* seg = segIt->next();
+ SMESH_TNodeXYZ n1 = seg->GetNode(0);
+ SMESH_TNodeXYZ n2 = seg->GetNode(1);
+ gp_XYZ p = 0.5 * ( n1 + n2 );
+ netgen::Point3d pi(p.X(), p.Y(), p.Z());
+ ngMesh->RestrictLocalH( pi, Max(( n1 - n2 ).Modulus(), netgen::mparam.minh ));
+ }
+ }
+ }
+ }
- int nbInputNodes = nodeVec.size()-1;
- nodeVec.resize( nbNodes+1, 0 );
+ // -------------------------
+ // Generate surface mesh
+ // -------------------------
- // add nodes
- for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
- {
- const MeshPoint& ngPoint = ngMesh->Point( ngID );
- SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
- nodeVec[ ngID ] = node;
- }
+ startWith = MESHCONST_MESHSURFACE;
+ endWith = MESHCONST_OPTSURFACE;
- // create faces
- const bool reverse = false; //( aShape.Orientation() == TopAbs_REVERSED );
- int i,j;
- for ( i = 1; i <= nbFaces ; ++i )
- {
- const Element2d& elem = ngMesh->SurfaceElement(i);
- vector<const SMDS_MeshNode*> nodes( elem.GetNP() );
- for (j=1; j <= elem.GetNP(); ++j)
+ netgen::mparam.uselocalh = true; // needed while optimization
+ try {
+ OCC_CATCH_SIGNALS;
+
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
+#else
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
+#endif
+ if(netgen::multithread.terminate)
+ return false;
+ if ( err )
+ error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
+ }
+ catch (Standard_Failure& ex)
{
- int pind = elem.PNum(j);
- if ( pind < 1 )
- break;
- const SMDS_MeshNode* node = nodeVec[ pind ];
- if ( reverse )
- nodes[ nodes.size()-j ] = node;
- else
- nodes[ j-1 ] = node;
- if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
+ SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
+ str << " at " << netgen::multithread.task
+ << ": " << ex.DynamicType()->Name();
+ if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
+ str << ": " << ex.GetMessageString();
+ error(str);
+ err = 1;
+ }
+ catch (...) {
+ SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
+ str << " at " << netgen::multithread.task;
+ error(str);
+ err = 1;
+ }
+ if ( err /*&& !isMESHCONST_ANALYSE*/ && iLoop == 0 )
+ {
+ netgen::mparam.minh = netgen::mparam.maxh;
+ netgen::mparam.maxh = 0;
+ for ( int iW = 0; iW < wires.size(); ++iW )
{
- const PointGeomInfo& pgi = elem.GeomInfoPi(j);
- meshDS->SetNodeOnFace((SMDS_MeshNode*)node, faceID, pgi.u, pgi.v);
+ StdMeshers_FaceSidePtr wire = wires[ iW ];
+ const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
+ for ( size_t iP = 1; iP < uvPtVec.size(); ++iP )
+ {
+ SMESH_TNodeXYZ p( uvPtVec[ iP ].node );
+ netgen::Point3d np( p.X(),p.Y(),p.Z());
+ double segLen = p.Distance( uvPtVec[ iP-1 ].node );
+ double size = ngMesh->GetH( np );
+ netgen::mparam.minh = Min( netgen::mparam.minh, size );
+ netgen::mparam.maxh = Max( netgen::mparam.maxh, segLen );
+ }
}
+ //cerr << "min " << netgen::mparam.minh << " max " << netgen::mparam.maxh << endl;
+ netgen::mparam.minh *= 0.9;
+ netgen::mparam.maxh *= 1.1;
+
+ continue;
}
- if ( j > elem.GetNP() )
+
+ // ----------------------------------------------------
+ // Fill the SMESHDS with the generated nodes and faces
+ // ----------------------------------------------------
+
+ int nbNodes = ngMesh->GetNP();
+ int nbFaces = ngMesh->GetNSE();
+
+ int nbInputNodes = nodeVec.size()-1;
+ nodeVec.resize( nbNodes+1, 0 );
+
+ // add nodes
+ for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
{
- SMDS_MeshFace* face = 0;
- if ( elem.GetType() == TRIG )
- face = helper.AddFace(nodes[0],nodes[1],nodes[2]);
- else
- face = helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
+ const MeshPoint& ngPoint = ngMesh->Point( ngID );
+ SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
+ nodeVec[ ngID ] = node;
}
- }
+
+ // create faces
+ const bool reverse = false; //( aShape.Orientation() == TopAbs_REVERSED );
+ int i,j;
+ for ( i = 1; i <= nbFaces ; ++i )
+ {
+ const Element2d& elem = ngMesh->SurfaceElement(i);
+ vector<const SMDS_MeshNode*> nodes( elem.GetNP() );
+ for (j=1; j <= elem.GetNP(); ++j)
+ {
+ int pind = elem.PNum(j);
+ if ( pind < 1 )
+ break;
+ const SMDS_MeshNode* node = nodeVec[ pind ];
+ if ( reverse )
+ nodes[ nodes.size()-j ] = node;
+ else
+ nodes[ j-1 ] = node;
+ if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
+ {
+ const PointGeomInfo& pgi = elem.GeomInfoPi(j);
+ meshDS->SetNodeOnFace((SMDS_MeshNode*)node, faceID, pgi.u, pgi.v);
+ }
+ }
+ if ( j > elem.GetNP() )
+ {
+ SMDS_MeshFace* face = 0;
+ if ( elem.GetType() == TRIG )
+ face = helper.AddFace(nodes[0],nodes[1],nodes[2]);
+ else
+ face = helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
+ }
+ }
+
+ ngLib._isComputeOk = !err;
+ break;
+
+ } // two attempts
return !err;
}
-#ifdef WITH_SMESH_CANCEL_COMPUTE
void NETGENPlugin_NETGEN_2D_ONLY::CancelCompute()
{
SMESH_Algo::CancelCompute();
netgen::multithread.terminate = 1;
}
-#endif
+
+//================================================================================
+/*!
+ * \brief Return progress of Compute() [0.,1]
+ */
+//================================================================================
+
+double NETGENPlugin_NETGEN_2D_ONLY::GetProgress() const
+{
+ const char* task1 = "Surface meshing";
+ //const char* task2 = "Optimizing surface";
+ double& progress = const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progress;
+ if ( _progressByTic < 0. &&
+ strncmp( netgen::multithread.task, task1, 3 ) == 0 )
+ {
+ progress = Min( 0.25, SMESH_Algo::GetProgressByTic() ); // [0, 0.25]
+ }
+ else //if ( strncmp( netgen::multithread.task, task2, 3 ) == 0)
+ {
+ if ( _progressByTic < 0 )
+ {
+ NETGENPlugin_NETGEN_2D_ONLY* me = (NETGENPlugin_NETGEN_2D_ONLY*) this;
+ me->_progressByTic = 0.25 / (_progressTic+1);
+ }
+ const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progressTic++;
+ progress = Max( progress, _progressByTic * _progressTic );
+ }
+ //cout << netgen::multithread.task << " " << _progressTic << endl;
+ return Min( progress, 0.99 );
+}
//=============================================================================
/*!
