465 lines
14 KiB
C++
465 lines
14 KiB
C++
// Copyright (C) 2007-2013 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.
|
|
//
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
//
|
|
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
|
|
//
|
|
|
|
// File : NETGENPlugin_NETGEN_2D_ONLY.cxx
|
|
// Author : Edward AGAPOV (OCC)
|
|
// Project : SALOME
|
|
//
|
|
#include "NETGENPlugin_NETGEN_2D_ONLY.hxx"
|
|
|
|
#include "NETGENPlugin_Mesher.hxx"
|
|
#include "NETGENPlugin_Hypothesis_2D.hxx"
|
|
|
|
#include <SMDS_MeshElement.hxx>
|
|
#include <SMDS_MeshNode.hxx>
|
|
#include <SMESHDS_Mesh.hxx>
|
|
#include <SMESH_Comment.hxx>
|
|
#include <SMESH_Gen.hxx>
|
|
#include <SMESH_Mesh.hxx>
|
|
#include <SMESH_MesherHelper.hxx>
|
|
#include <SMESH_subMesh.hxx>
|
|
#include <StdMeshers_FaceSide.hxx>
|
|
#include <StdMeshers_LengthFromEdges.hxx>
|
|
#include <StdMeshers_MaxElementArea.hxx>
|
|
#include <StdMeshers_QuadranglePreference.hxx>
|
|
#include <StdMeshers_ViscousLayers2D.hxx>
|
|
|
|
#include <Precision.hxx>
|
|
#include <Standard_ErrorHandler.hxx>
|
|
#include <Standard_Failure.hxx>
|
|
|
|
#include <utilities.h>
|
|
|
|
#include <list>
|
|
#include <vector>
|
|
#include <limits>
|
|
|
|
/*
|
|
Netgen include files
|
|
*/
|
|
namespace nglib {
|
|
#include <nglib.h>
|
|
}
|
|
#ifndef OCCGEOMETRY
|
|
#define OCCGEOMETRY
|
|
#endif
|
|
#include <occgeom.hpp>
|
|
#include <meshing.hpp>
|
|
//#include <meshtype.hpp>
|
|
namespace netgen {
|
|
#ifdef NETGEN_V5
|
|
extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
|
|
#else
|
|
extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
|
|
#endif
|
|
extern MeshingParameters mparam;
|
|
}
|
|
|
|
using namespace std;
|
|
using namespace netgen;
|
|
using namespace nglib;
|
|
|
|
//#define DUMP_SEGMENTS
|
|
|
|
//=============================================================================
|
|
/*!
|
|
*
|
|
*/
|
|
//=============================================================================
|
|
|
|
NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY(int hypId, int studyId,
|
|
SMESH_Gen* gen)
|
|
: SMESH_2D_Algo(hypId, studyId, gen)
|
|
{
|
|
MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY");
|
|
_name = "NETGEN_2D_ONLY";
|
|
|
|
_shapeType = (1 << TopAbs_FACE);// 1 bit /shape type
|
|
|
|
_compatibleHypothesis.push_back("MaxElementArea");
|
|
_compatibleHypothesis.push_back("LengthFromEdges");
|
|
_compatibleHypothesis.push_back("QuadranglePreference");
|
|
_compatibleHypothesis.push_back("NETGEN_Parameters_2D");
|
|
_compatibleHypothesis.push_back("ViscousLayers2D");
|
|
|
|
_hypMaxElementArea = 0;
|
|
_hypLengthFromEdges = 0;
|
|
_hypQuadranglePreference = 0;
|
|
_hypParameters = 0;
|
|
}
|
|
|
|
//=============================================================================
|
|
/*!
|
|
*
|
|
*/
|
|
//=============================================================================
|
|
|
|
NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY()
|
|
{
|
|
MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY");
|
|
}
|
|
|
|
//=============================================================================
|
|
/*!
|
|
*
|
|
*/
|
|
//=============================================================================
|
|
|
|
bool NETGENPlugin_NETGEN_2D_ONLY::CheckHypothesis (SMESH_Mesh& aMesh,
|
|
const TopoDS_Shape& aShape,
|
|
Hypothesis_Status& aStatus)
|
|
{
|
|
_hypMaxElementArea = 0;
|
|
_hypLengthFromEdges = 0;
|
|
_hypQuadranglePreference = 0;
|
|
|
|
const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape, false);
|
|
|
|
if (hyps.empty())
|
|
{
|
|
aStatus = HYP_OK; //SMESH_Hypothesis::HYP_MISSING;
|
|
return true; // (PAL13464) can work with no hypothesis, LengthFromEdges is default one
|
|
}
|
|
|
|
aStatus = HYP_MISSING;
|
|
|
|
list<const SMESHDS_Hypothesis*>::const_iterator ith;
|
|
for (ith = hyps.begin(); ith != hyps.end(); ++ith )
|
|
{
|
|
const SMESHDS_Hypothesis* hyp = (*ith);
|
|
|
|
string hypName = hyp->GetName();
|
|
|
|
if ( hypName == "MaxElementArea")
|
|
_hypMaxElementArea = static_cast<const StdMeshers_MaxElementArea*> (hyp);
|
|
else if ( hypName == "LengthFromEdges" )
|
|
_hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges*> (hyp);
|
|
else if ( hypName == "QuadranglePreference" )
|
|
_hypQuadranglePreference = static_cast<const StdMeshers_QuadranglePreference*>(hyp);
|
|
else if ( hypName == "NETGEN_Parameters_2D" )
|
|
_hypParameters = static_cast<const NETGENPlugin_Hypothesis_2D*>(hyp);
|
|
else if ( hypName == StdMeshers_ViscousLayers2D::GetHypType() )
|
|
continue;
|
|
else {
|
|
aStatus = HYP_INCOMPATIBLE;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
int nbHyps = bool(_hypMaxElementArea) + bool(_hypLengthFromEdges) + bool(_hypParameters );
|
|
if ( nbHyps > 1 )
|
|
aStatus = HYP_CONCURENT;
|
|
else
|
|
aStatus = HYP_OK;
|
|
|
|
return ( aStatus == HYP_OK );
|
|
}
|
|
|
|
//=============================================================================
|
|
/*!
|
|
*Here we are going to use the NETGEN mesher
|
|
*/
|
|
//=============================================================================
|
|
|
|
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()");
|
|
|
|
SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
|
|
int faceID = meshDS->ShapeToIndex( aShape );
|
|
|
|
SMESH_MesherHelper helper(aMesh);
|
|
_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 ));
|
|
SMESH_ProxyMesh::Ptr proxyMesh = StdMeshers_ViscousLayers2D::Compute( aMesh, F );
|
|
if ( !proxyMesh )
|
|
return false;
|
|
|
|
// ------------------------
|
|
// get all edges of a face
|
|
// ------------------------
|
|
TError problem;
|
|
TSideVector wires =
|
|
StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, problem, proxyMesh );
|
|
if ( problem && !problem->IsOK() )
|
|
return error( problem );
|
|
int nbWires = wires.size();
|
|
if ( nbWires == 0 )
|
|
return error( "Problem in StdMeshers_FaceSide::GetFaceWires()");
|
|
if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
|
|
return error(COMPERR_BAD_INPUT_MESH,
|
|
SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments());
|
|
|
|
// --------------------
|
|
// compute edge length
|
|
// --------------------
|
|
|
|
NETGENPlugin_Mesher aMesher( &aMesh, aShape, /*isVolume=*/false);
|
|
netgen::OCCGeometry occgeo;
|
|
aMesher.PrepareOCCgeometry( occgeo, F, aMesh );
|
|
occgeo.fmap.Clear(); // face can be reversed, which is wrong in this case (issue 19978)
|
|
occgeo.fmap.Add( F );
|
|
|
|
if ( _hypParameters )
|
|
{
|
|
aMesher.SetParameters(_hypParameters);
|
|
}
|
|
else
|
|
{
|
|
double edgeLength = 0;
|
|
if (_hypLengthFromEdges || (!_hypLengthFromEdges && !_hypMaxElementArea))
|
|
{
|
|
int nbSegments = 0;
|
|
for ( int iW = 0; iW < nbWires; ++iW )
|
|
{
|
|
edgeLength += wires[ iW ]->Length();
|
|
nbSegments += wires[ iW ]->NbSegments();
|
|
}
|
|
if ( nbSegments )
|
|
edgeLength /= nbSegments;
|
|
}
|
|
if ( _hypMaxElementArea )
|
|
{
|
|
double maxArea = _hypMaxElementArea->GetMaxArea();
|
|
edgeLength = sqrt(2. * maxArea/sqrt(3.0));
|
|
}
|
|
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
|
|
}
|
|
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);
|
|
|
|
vector< const SMDS_MeshNode* > nodeVec;
|
|
problem = aMesher.AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
|
|
if ( problem && !problem->IsOK() )
|
|
return error( problem );
|
|
|
|
// -------------------------
|
|
// Generate surface mesh
|
|
// -------------------------
|
|
|
|
#ifndef NETGEN_V5
|
|
char *optstr = 0;
|
|
#endif
|
|
int startWith = MESHCONST_MESHSURFACE;
|
|
int endWith = MESHCONST_OPTSURFACE;
|
|
int err = 1;
|
|
|
|
try {
|
|
#if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
|
|
OCC_CATCH_SIGNALS;
|
|
#endif
|
|
#ifdef NETGEN_V5
|
|
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;
|
|
#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);
|
|
}
|
|
|
|
// ----------------------------------------------------
|
|
// 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 )
|
|
{
|
|
const MeshPoint& ngPoint = ngMesh->Point( ngID );
|
|
SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
|
|
nodeVec[ ngID ] = node;
|
|
}
|
|
|
|
// create faces
|
|
bool reverse = ( 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]);
|
|
}
|
|
}
|
|
|
|
return !err;
|
|
}
|
|
|
|
#ifdef WITH_SMESH_CANCEL_COMPUTE
|
|
void NETGENPlugin_NETGEN_2D_ONLY::CancelCompute()
|
|
{
|
|
SMESH_Algo::CancelCompute();
|
|
netgen::multithread.terminate = 1;
|
|
}
|
|
#endif
|
|
|
|
//=============================================================================
|
|
/*!
|
|
*
|
|
*/
|
|
//=============================================================================
|
|
|
|
bool NETGENPlugin_NETGEN_2D_ONLY::Evaluate(SMESH_Mesh& aMesh,
|
|
const TopoDS_Shape& aShape,
|
|
MapShapeNbElems& aResMap)
|
|
{
|
|
TopoDS_Face F = TopoDS::Face(aShape);
|
|
if(F.IsNull())
|
|
return false;
|
|
|
|
// collect info from edges
|
|
int nb0d = 0, nb1d = 0;
|
|
bool IsQuadratic = false;
|
|
bool IsFirst = true;
|
|
double fullLen = 0.0;
|
|
TopTools_MapOfShape tmpMap;
|
|
for (TopExp_Explorer exp(F, TopAbs_EDGE); exp.More(); exp.Next()) {
|
|
TopoDS_Edge E = TopoDS::Edge(exp.Current());
|
|
if( tmpMap.Contains(E) )
|
|
continue;
|
|
tmpMap.Add(E);
|
|
SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(exp.Current());
|
|
MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
|
|
if( anIt==aResMap.end() ) {
|
|
SMESH_subMesh *sm = aMesh.GetSubMesh(F);
|
|
SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
|
|
smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
|
|
return false;
|
|
}
|
|
std::vector<int> aVec = (*anIt).second;
|
|
nb0d += aVec[SMDSEntity_Node];
|
|
nb1d += Max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
|
|
double aLen = SMESH_Algo::EdgeLength(E);
|
|
fullLen += aLen;
|
|
if(IsFirst) {
|
|
IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
|
|
IsFirst = false;
|
|
}
|
|
}
|
|
tmpMap.Clear();
|
|
|
|
// compute edge length
|
|
double ELen = 0;
|
|
if (_hypLengthFromEdges || !_hypLengthFromEdges && !_hypMaxElementArea) {
|
|
if ( nb1d > 0 )
|
|
ELen = fullLen / nb1d;
|
|
}
|
|
if ( _hypMaxElementArea ) {
|
|
double maxArea = _hypMaxElementArea->GetMaxArea();
|
|
ELen = sqrt(2. * maxArea/sqrt(3.0));
|
|
}
|
|
GProp_GProps G;
|
|
BRepGProp::SurfaceProperties(F,G);
|
|
double anArea = G.Mass();
|
|
|
|
const int hugeNb = numeric_limits<int>::max()/10;
|
|
if ( anArea / hugeNb > ELen*ELen )
|
|
{
|
|
SMESH_subMesh *sm = aMesh.GetSubMesh(F);
|
|
SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
|
|
smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated.\nToo small element length",this));
|
|
return false;
|
|
}
|
|
int nbFaces = (int) ( anArea / ( ELen*ELen*sqrt(3.) / 4 ) );
|
|
int nbNodes = (int) ( ( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
|
|
std::vector<int> aVec(SMDSEntity_Last);
|
|
for(int i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
|
|
if( IsQuadratic ) {
|
|
aVec[SMDSEntity_Node] = nbNodes;
|
|
aVec[SMDSEntity_Quad_Triangle] = nbFaces;
|
|
}
|
|
else {
|
|
aVec[SMDSEntity_Node] = nbNodes;
|
|
aVec[SMDSEntity_Triangle] = nbFaces;
|
|
}
|
|
SMESH_subMesh *sm = aMesh.GetSubMesh(F);
|
|
aResMap.insert(std::make_pair(sm,aVec));
|
|
|
|
return true;
|
|
}
|