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0021543: EDF 1978 SMESH: Viscous layer for 2D meshes

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Add StdMeshers_ViscousLayers2D hypothesis
This commit is contained in:
eap 2012-10-15 15:05:25 +00:00
parent 85460a3754
commit fff3f03c3a
7 changed files with 360 additions and 275 deletions
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3
resources/NETGENPlugin.xml
View File

@ -79,7 +79,7 @@
label-id="Netgen 2D"
icon-id="mesh_algo_netgen_2d.png"
hypos="LengthFromEdges,MaxElementArea,NETGEN_Parameters_2D_ONLY"
opt-hypos="QuadranglePreference"
opt-hypos="QuadranglePreference,ViscousLayers2D"
input="EDGE"
output="TRIA,QUAD"
dim="2">
@ -96,6 +96,7 @@
label-id="Netgen 1D-2D"
icon-id="mesh_algo_netgen_2d.png"
hypos="NETGEN_Parameters_2D, NETGEN_SimpleParameters_2D"
opt-hypos="ViscousLayers2D"
output="TRIA,QUAD"
dim="2"
support-submeshes="true">

316
src/NETGENPlugin/NETGENPlugin_Mesher.cxx
View File

@ -44,6 +44,7 @@
#include <SMESH_MesherHelper.hxx>
#include <SMESH_subMesh.hxx>
#include <StdMeshers_QuadToTriaAdaptor.hxx>
#include <StdMeshers_ViscousLayers2D.hxx>
#include <utilities.h>
@ -96,7 +97,7 @@ using namespace std;
// dump elements added to ng mesh
//#define DUMP_SEGMENTS
//#define DUMP_TRIANGLES
//#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug addIntVerticesInSolids()
//#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug AddIntVerticesInSolids()
TopTools_IndexedMapOfShape ShapesWithLocalSize;
std::map<int,double> VertexId2LocalSize;
@ -109,17 +110,18 @@ std::map<int,double> FaceId2LocalSize;
*/
//=============================================================================
NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
const TopoDS_Shape& aShape,
const bool isVolume)
const bool isVolume)
: _mesh (mesh),
_shape (aShape),
_isVolume(isVolume),
_optimize(true),
_fineness(NETGENPlugin_Hypothesis::GetDefaultFineness()),
_isViscousLayers2D(false),
_simpleHyp(NULL)
{
defaultParameters();
SetDefaultParameters();
ShapesWithLocalSize.Clear();
VertexId2LocalSize.clear();
EdgeId2LocalSize.clear();
@ -132,7 +134,7 @@ NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
*/
//================================================================================
void NETGENPlugin_Mesher::defaultParameters()
void NETGENPlugin_Mesher::SetDefaultParameters()
{
netgen::MeshingParameters& mparams = netgen::mparam;
// maximal mesh edge size
@ -253,7 +255,7 @@ void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D*
{
_simpleHyp = hyp;
if ( _simpleHyp )
defaultParameters();
SetDefaultParameters();
}
//=============================================================================
@ -607,7 +609,7 @@ void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh, const gp_XYZ&
*/
//================================================================================
bool NETGENPlugin_Mesher::fillNgMesh(netgen::OCCGeometry& occgeom,
bool NETGENPlugin_Mesher::FillNgMesh(netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
vector<const SMDS_MeshNode*>& nodeVec,
const list< SMESH_subMesh* > & meshedSM,
@ -941,7 +943,7 @@ bool NETGENPlugin_Mesher::fillNgMesh(netgen::OCCGeometry& occgeom,
*/
//================================================================================
void NETGENPlugin_Mesher::fixIntFaces(const netgen::OCCGeometry& occgeom,
void NETGENPlugin_Mesher::FixIntFaces(const netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
NETGENPlugin_Internals& internalShapes)
{
@ -1048,7 +1050,7 @@ namespace
*/
//================================================================================
void NETGENPlugin_Mesher::addIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
void NETGENPlugin_Mesher::AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
vector<const SMDS_MeshNode*>& nodeVec,
NETGENPlugin_Internals& internalShapes)
@ -1234,7 +1236,7 @@ void NETGENPlugin_Mesher::addIntVerticesInFaces(const netgen::OCCGeometry& o
*/
//================================================================================
void NETGENPlugin_Mesher::addIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
void NETGENPlugin_Mesher::AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
vector<const SMDS_MeshNode*>& nodeVec,
NETGENPlugin_Internals& internalShapes)
@ -1451,6 +1453,237 @@ void NETGENPlugin_Mesher::addIntVerticesInSolids(const netgen::OCCGeometry&
} // loop on solids with internal vertices
}
//================================================================================
/*!
* \brief Fill netgen mesh with segments of a FACE
* \param ngMesh - netgen mesh
* \param geom - container of OCCT geometry to mesh
* \param wires - data of nodes on FACE boundary
* \param helper - mesher helper holding the FACE
* \param nodeVec - vector of nodes in which node index == netgen ID
* \retval SMESH_ComputeErrorPtr - error description
*/
//================================================================================
SMESH_ComputeErrorPtr
NETGENPlugin_Mesher::AddSegmentsToMesh(netgen::Mesh& ngMesh,
netgen::OCCGeometry& geom,
const TSideVector& wires,
SMESH_MesherHelper& helper,
vector< const SMDS_MeshNode* > & nodeVec)
{
// ----------------------------
// Check wires and count nodes
// ----------------------------
int nbNodes = 0;
for ( int iW = 0; iW < wires.size(); ++iW )
{
StdMeshers_FaceSidePtr wire = wires[ iW ];
if ( wire->MissVertexNode() )
{
// Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
// It seems that there is no reason for this limitation
// return TError
// (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
}
const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
if ( uvPtVec.size() != wire->NbPoints() )
return SMESH_ComputeError::New(COMPERR_BAD_INPUT_MESH,
SMESH_Comment("Unexpected nb of points on wire ") << iW
<< ": " << uvPtVec.size()<<" != "<<wire->NbPoints());
nbNodes += wire->NbPoints();
}
nodeVec.reserve( nodeVec.size() + nbNodes + 1 );
if ( nodeVec.empty() )
nodeVec.push_back( 0 );
// -----------------
// Fill netgen mesh
// -----------------
const bool wasNgMeshEmpty = ( ngMesh.GetNP() < 1 ); /* true => this method is called by
NETGENPlugin_NETGEN_2D_ONLY */
// map for nodes on vertices since they can be shared between wires
// ( issue 0020676, face_int_box.brep) and nodes built by NETGEN
map<const SMDS_MeshNode*, int > node2ngID;
if ( !wasNgMeshEmpty ) // fill node2ngID with nodes built by NETGEN
{
set< int > subIDs; // ids of sub-shapes of the FACE
for ( int iW = 0; iW < wires.size(); ++iW )
{
StdMeshers_FaceSidePtr wire = wires[ iW ];
for ( int iE = 0, nbE = wire->NbEdges(); iE < nbE; ++iE )
{
subIDs.insert( wire->EdgeID( iE ));
subIDs.insert( helper.GetMeshDS()->ShapeToIndex( wire->FirstVertex( iE )));
}
}
for ( size_t ngID = 1; ngID < nodeVec.size(); ++ngID )
if ( subIDs.count( nodeVec[ngID]->getshapeId() ))
node2ngID.insert( make_pair( nodeVec[ngID], ngID ));
}
const int solidID = 0, faceID = geom.fmap.FindIndex( helper.GetSubShape() );
if ( ngMesh.GetNFD() < 1 )
ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(faceID, solidID, solidID, 0));
for ( int iW = 0; iW < wires.size(); ++iW )
{
StdMeshers_FaceSidePtr wire = wires[ iW ];
const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
const int nbSegments = wire->NbPoints() - 1;
// assure the 1st node to be in node2ngID, which is needed to correctly
// "close chain of segments" (see below) in case if the 1st node is not
// onVertex because it is on a Viscous layer
node2ngID.insert( make_pair( uvPtVec[ 0 ].node, ngMesh.GetNP() + 1 ));
// compute length of every segment
vector<double> segLen( nbSegments );
for ( int i = 0; i < nbSegments; ++i )
segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
int edgeID = 1, posID = -2;
bool isInternalWire = false;
double vertexNormPar = 0;
for ( int i = 0; i < nbSegments; ++i ) // loop on segments
{
// Add the first point of a segment
const SMDS_MeshNode * n = uvPtVec[ i ].node;
const int posShapeID = n->getshapeId();
bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
bool onEdge = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE );
// skip nodes on degenerated edges
if ( helper.IsDegenShape( posShapeID ) &&
helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
continue;
int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
if ( onVertex || ( !wasNgMeshEmpty && onEdge ))
ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
if ( ngID1 > ngMesh.GetNP() )
{
netgen::MeshPoint mp( netgen::Point<3> (n->X(), n->Y(), n->Z()) );
ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
nodeVec.push_back( n );
}
else // n is in ngMesh already, and ngID2 in prev segment is wrong
{
ngID2 = ngMesh.GetNP() + 1;
if ( i > 0 ) // prev segment belongs to same wire
{
netgen::Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
prevSeg[1] = ngID1;
}
}
// Add the segment
netgen::Segment seg;
seg[0] = ngID1; // ng node id
seg[1] = ngID2; // ng node id
seg.edgenr = ngMesh.GetNSeg() + 1; // ng segment id
seg.si = faceID; // = geom.fmap.FindIndex (face);
for ( int iEnd = 0; iEnd < 2; ++iEnd)
{
const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
seg.epgeominfo[ iEnd ].u = pnt.u;
seg.epgeominfo[ iEnd ].v = pnt.v;
// find out edge id and node parameter on edge
onVertex = ( pnt.normParam + 1e-10 > vertexNormPar );
if ( onVertex || posShapeID != posID )
{
// get edge id
double normParam = pnt.normParam;
if ( onVertex )
normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
int edgeIndexInWire = wire->EdgeIndex( normParam );
vertexNormPar = wire->LastParameter( edgeIndexInWire );
const TopoDS_Edge& edge = wire->Edge( edgeIndexInWire );
edgeID = geom.emap.FindIndex( edge );
posID = posShapeID;
isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
// if ( onVertex ) // param on curve is different on each of two edges
// seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
}
seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
}
ngMesh.AddSegment (seg);
{
// restrict size of elements near the segment
SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
// get an average size of adjacent segments to avoid sharp change of
// element size (regression on issue 0020452, note 0010898)
int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
double avgH = ( segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ]) / 3;
RestrictLocalSize( ngMesh, 0.5*(np1+np2), avgH );
}
#ifdef DUMP_SEGMENTS
cout << "Segment: " << seg.edgenr << endl
<< "\tp1: " << seg[0] << endl
<< "\tp2: " << seg[1] << endl
<< "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
<< "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
<< "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
<< "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
#endif
if ( isInternalWire )
{
swap (seg[0], seg[1]);
swap( seg.epgeominfo[0], seg.epgeominfo[1] );
seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
ngMesh.AddSegment (seg);
#ifdef DUMP_SEGMENTS
cout << "Segment: " << seg.edgenr << endl << "\tis REVRESE of the previous one" << endl;
#endif
}
} // loop on segments on a wire
// close chain of segments
if ( nbSegments > 0 )
{
netgen::Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire));
const SMDS_MeshNode * lastNode = uvPtVec.back().node;
lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
if ( lastSeg[1] > ngMesh.GetNP() )
{
netgen::MeshPoint mp( netgen::Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
nodeVec.push_back( lastNode );
}
if ( isInternalWire )
{
netgen::Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
realLastSeg[0] = lastSeg[1];
}
}
} // loop on WIREs of a FACE
// add a segment instead of an internal vertex
if ( wasNgMeshEmpty )
{
NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
AddIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
}
ngMesh.CalcSurfacesOfNode();
return TError();
}
//================================================================================
/*!
* \brief Fill SMESH mesh according to contents of netgen mesh
@ -1822,11 +2055,12 @@ bool NETGENPlugin_Mesher::Compute()
" elements per radius = " << mparams.curvaturesafety << "\n"
" second order = " << mparams.secondorder << "\n"
" quad allowed = " << mparams.quad);
cout << " quad allowed = " << mparams.quad<<endl;
//cout << " quad allowed = " << mparams.quad<<endl;
SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
static string debugFile = "/tmp/ngMesh.py"; /* to call toPython( ngMesh, debugFile )
while debugging netgen */
// -------------------------
// Prepare OCC geometry
// -------------------------
@ -2002,9 +2236,8 @@ bool NETGENPlugin_Mesher::Compute()
// Fill ngMesh with nodes and segments of computed submeshes
if ( !err )
{
_faceDescriptors.clear();
err = ! ( fillNgMesh(occgeo, *ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
fillNgMesh(occgeo, *ngMesh, nodeVec, meshedSM[ MeshDim_1D ]));
err = ! ( FillNgMesh(occgeo, *ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
FillNgMesh(occgeo, *ngMesh, nodeVec, meshedSM[ MeshDim_1D ]));
}
initState = NETGENPlugin_ngMeshInfo(ngMesh);
@ -2072,10 +2305,44 @@ bool NETGENPlugin_Mesher::Compute()
if ( internals.hasInternalVertexInFace() )
{
// store computed segments in SMESH in order not to create SMESH
// edges for ng segments added by addIntVerticesInFaces()
// edges for ng segments added by AddIntVerticesInFaces()
FillSMesh( occgeo, *ngMesh, initState, *_mesh, nodeVec, comment );
// add segments to faces with internal vertices
addIntVerticesInFaces( occgeo, *ngMesh, nodeVec, internals );
AddIntVerticesInFaces( occgeo, *ngMesh, nodeVec, internals );
initState = NETGENPlugin_ngMeshInfo(ngMesh);
}
// Build viscous layers
if ( _isViscousLayers2D )
{
if ( !internals.hasInternalVertexInFace() ) {
FillSMesh( occgeo, *ngMesh, initState, *_mesh, nodeVec, comment );
initState = NETGENPlugin_ngMeshInfo(ngMesh);
}
SMESH_ProxyMesh::Ptr viscousMesh;
SMESH_MesherHelper helper( *_mesh );
for ( int faceID = 1; faceID <= occgeo.fmap.Extent(); ++faceID )
{
const TopoDS_Face& F = TopoDS::Face( occgeo.fmap( faceID ));
viscousMesh = StdMeshers_ViscousLayers2D::Compute( *_mesh, F );
if ( !viscousMesh )
return false;
// exclude from computation ng segments built on EDGEs of F
for (int i = 1; i <= ngMesh->GetNSeg(); i++)
{
netgen::Segment & seg = ngMesh->LineSegment(i);
if (seg.si == faceID)
seg.si = 0;
}
// add new segments to ngMesh instead of excluded ones
helper.SetSubShape( F );
TSideVector wires =
StdMeshers_FaceSide::GetFaceWires( F, *_mesh, /*skipMediumNodes=*/true,
error, viscousMesh );
error = AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
if ( !error ) error = SMESH_ComputeError::New();
}
initState = NETGENPlugin_ngMeshInfo(ngMesh);
}
@ -2131,11 +2398,11 @@ bool NETGENPlugin_Mesher::Compute()
quadFaceSM.push_back( _mesh->GetSubMesh( face.Current() ));
meshedSM[ MeshDim_2D ].remove( quadFaceSM.back() );
}
fillNgMesh(occgeo, *ngMesh, nodeVec, quadFaceSM, proxyMesh);
FillNgMesh(occgeo, *ngMesh, nodeVec, quadFaceSM, proxyMesh);
}
}
// fill ngMesh with faces of sub-meshes
err = ! ( fillNgMesh(occgeo, *ngMesh, nodeVec, meshedSM[ MeshDim_2D ]));
err = ! ( FillNgMesh(occgeo, *ngMesh, nodeVec, meshedSM[ MeshDim_2D ]));
initState = NETGENPlugin_ngMeshInfo(ngMesh);
//toPython( ngMesh, "/tmp/ngPython.py");
}
@ -2165,9 +2432,9 @@ bool NETGENPlugin_Mesher::Compute()
// faces for ng faces added here
FillSMesh( occgeo, *ngMesh, initState, *_mesh, nodeVec, comment );
// add ng faces to solids with internal vertices
addIntVerticesInSolids( occgeo, *ngMesh, nodeVec, internals );
AddIntVerticesInSolids( occgeo, *ngMesh, nodeVec, internals );
// duplicate mesh faces on internal faces
fixIntFaces( occgeo, *ngMesh, internals );
FixIntFaces( occgeo, *ngMesh, internals );
initState = NETGENPlugin_ngMeshInfo(ngMesh);
}
// Let netgen compute 3D mesh
@ -2258,7 +2525,7 @@ bool NETGENPlugin_Mesher::Compute()
if ( true /*isOK*/ ) // get whatever built
FillSMesh( occgeo, *ngMesh, initState, *_mesh, nodeVec, comment ); //!<
SMESH_ComputeErrorPtr readErr = readErrors(nodeVec);
SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
if ( readErr && !readErr->myBadElements.empty() )
error = readErr;
@ -2605,7 +2872,7 @@ void NETGENPlugin_Mesher::RemoveTmpFiles()
//================================================================================
SMESH_ComputeErrorPtr
NETGENPlugin_Mesher::readErrors(const vector<const SMDS_MeshNode* >& nodeVec)
NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
{
SMESH_ComputeErrorPtr err = SMESH_ComputeError::New
(COMPERR_BAD_INPUT_MESH, "Some edges multiple times in surface mesh");
@ -2688,7 +2955,7 @@ void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh,
outfile << "mesh.AddNode( ";
outfile << (*ngMesh)[pi](0) << ", ";
outfile << (*ngMesh)[pi](1) << ", ";
outfile << (*ngMesh)[pi](2) << ")" << endl;
outfile << (*ngMesh)[pi](2) << ") ## "<< pi << endl;
}
int nbDom = ngMesh->GetNDomains();
@ -2702,6 +2969,7 @@ void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh,
Element2d sel = (*ngMesh)[sei];
for (int j = 0; j < sel.GetNP(); j++)
outfile << sel[j] << ( j+1 < sel.GetNP() ? ", " : " ])");
if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
outfile << endl;
if ((*ngMesh)[sei].GetIndex())

22
src/NETGENPlugin/NETGENPlugin_Mesher.hxx
View File

@ -88,6 +88,7 @@ class NETGENPLUGIN_EXPORT NETGENPlugin_Mesher
void SetParameters(const NETGENPlugin_Hypothesis* hyp);
void SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp);
void SetViscousLayers2DAssigned(bool isAssigned) { _isViscousLayers2D = isAssigned; }
bool Compute();
@ -111,31 +112,38 @@ class NETGENPLUGIN_EXPORT NETGENPlugin_Mesher
std::vector<const SMDS_MeshNode*>& nodeVec,
SMESH_Comment& comment);
bool fillNgMesh(netgen::OCCGeometry& occgeom,
bool FillNgMesh(netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
std::vector<const SMDS_MeshNode*>& nodeVec,
const std::list< SMESH_subMesh* > & meshedSM,
SMESH_ProxyMesh::Ptr proxyMesh=SMESH_ProxyMesh::Ptr());
static void fixIntFaces(const netgen::OCCGeometry& occgeom,
static void FixIntFaces(const netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
NETGENPlugin_Internals& internalShapes);
static void addIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
static void AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
std::vector<const SMDS_MeshNode*>& nodeVec,
NETGENPlugin_Internals& internalShapes);
static void addIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
static void AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
netgen::Mesh& ngMesh,
std::vector<const SMDS_MeshNode*>& nodeVec,
NETGENPlugin_Internals& internalShapes);
void defaultParameters();
static SMESH_ComputeErrorPtr
AddSegmentsToMesh(netgen::Mesh& ngMesh,
netgen::OCCGeometry& geom,
const TSideVector& wires,
SMESH_MesherHelper& helper,
std::vector< const SMDS_MeshNode* > & nodeVec);
void SetDefaultParameters();
static void RemoveTmpFiles();
static SMESH_ComputeErrorPtr readErrors(const std::vector< const SMDS_MeshNode* >& nodeVec);
static SMESH_ComputeErrorPtr ReadErrors(const std::vector< const SMDS_MeshNode* >& nodeVec);
static void toPython( const netgen::Mesh* ngMesh,
@ -147,9 +155,9 @@ class NETGENPLUGIN_EXPORT NETGENPlugin_Mesher
bool _isVolume;
bool _optimize;
int _fineness;
bool _isViscousLayers2D;
const NETGENPlugin_SimpleHypothesis_2D * _simpleHyp;
std::map< int, std::pair<int,int> > _faceDescriptors;
};
//=============================================================================

56
src/NETGENPlugin/NETGENPlugin_NETGEN_2D.cxx
View File

@ -32,10 +32,11 @@
#include "NETGENPlugin_SimpleHypothesis_2D.hxx"
#include "NETGENPlugin_Mesher.hxx"
#include <SMESHDS_Mesh.hxx>
#include <SMESH_ControlsDef.hxx>
#include <SMESH_Gen.hxx>
#include <SMESH_Mesh.hxx>
#include <SMESH_ControlsDef.hxx>
#include <SMESHDS_Mesh.hxx>
#include <StdMeshers_ViscousLayers2D.hxx>
#include <utilities.h>
#include <list>
@ -64,10 +65,11 @@ NETGENPlugin_NETGEN_2D::NETGENPlugin_NETGEN_2D(int hypId, int studyId,
_shapeType = (1 << TopAbs_FACE); // 1 bit /shape type
_compatibleHypothesis.push_back("NETGEN_Parameters_2D");
_compatibleHypothesis.push_back("NETGEN_SimpleParameters_2D");
_compatibleHypothesis.push_back( StdMeshers_ViscousLayers2D::GetHypType() );
_requireDiscreteBoundary = false;
_onlyUnaryInput = false;
_hypothesis = NULL;
_supportSubmeshes = true;
_onlyUnaryInput = false;
_hypothesis = NULL;
_supportSubmeshes = true;
}
//=============================================================================
@ -87,33 +89,28 @@ NETGENPlugin_NETGEN_2D::~NETGENPlugin_NETGEN_2D()
*/
//=============================================================================
bool NETGENPlugin_NETGEN_2D::CheckHypothesis
(SMESH_Mesh& aMesh,
const TopoDS_Shape& aShape,
SMESH_Hypothesis::Hypothesis_Status& aStatus)
bool NETGENPlugin_NETGEN_2D::CheckHypothesis (SMESH_Mesh& aMesh,
const TopoDS_Shape& aShape,
Hypothesis_Status& aStatus)
{
_hypothesis = NULL;
_hypothesis = NULL;
_isViscousLayers2D = false;
const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape);
int nbHyp = hyps.size();
if (!nbHyp)
{
aStatus = SMESH_Hypothesis::HYP_OK;
return true; // can work with no hypothesis
}
// use only the first hypothesis
const SMESHDS_Hypothesis* theHyp = hyps.front();
// can work with no hypothesis
aStatus = SMESH_Hypothesis::HYP_OK;
string hypName = theHyp->GetName();
if ( find( _compatibleHypothesis.begin(), _compatibleHypothesis.end(),
hypName ) != _compatibleHypothesis.end() )
const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape, /*skipAux=*/false);
list<const SMESHDS_Hypothesis*>::const_iterator h = hyps.begin();
for ( ; h != hyps.end(); ++h )
{
_hypothesis = theHyp;
aStatus = SMESH_Hypothesis::HYP_OK;
}
else
{
aStatus = SMESH_Hypothesis::HYP_INCOMPATIBLE;
const SMESHDS_Hypothesis* theHyp = *h;
string hypName = theHyp->GetName();
if ( hypName == StdMeshers_ViscousLayers2D::GetHypType() )
_isViscousLayers2D = true;
else if ( _hypothesis )
aStatus = SMESH_Hypothesis::HYP_INCOMPATIBLE;
else
_hypothesis = theHyp;
}
return aStatus == SMESH_Hypothesis::HYP_OK;
@ -132,9 +129,10 @@ bool NETGENPlugin_NETGEN_2D::Compute(SMESH_Mesh& aMesh,
netgen::multithread.terminate = 0;
#endif
NETGENPlugin_Mesher mesher(&aMesh, aShape, false);
NETGENPlugin_Mesher mesher(&aMesh, aShape, /*is3D = */false);
mesher.SetParameters(dynamic_cast<const NETGENPlugin_Hypothesis*>(_hypothesis));
mesher.SetParameters(dynamic_cast<const NETGENPlugin_SimpleHypothesis_2D*>(_hypothesis));
mesher.SetViscousLayers2DAssigned( _isViscousLayers2D );
return mesher.Compute();
}

1
src/NETGENPlugin/NETGENPlugin_NETGEN_2D.hxx
View File

@ -59,6 +59,7 @@ public:
protected:
const SMESHDS_Hypothesis* _hypothesis;
bool _isViscousLayers2D;
};
#endif

233
src/NETGENPlugin/NETGENPlugin_NETGEN_2D_ONLY.cxx
View File

@ -38,6 +38,7 @@
#include <StdMeshers_LengthFromEdges.hxx>
#include <StdMeshers_MaxElementArea.hxx>
#include <StdMeshers_QuadranglePreference.hxx>
#include <StdMeshers_ViscousLayers2D.hxx>
#include <Precision.hxx>
#include <Standard_ErrorHandler.hxx>
@ -91,6 +92,7 @@ NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY(int hypId, int studyId,
_compatibleHypothesis.push_back("LengthFromEdges");
_compatibleHypothesis.push_back("QuadranglePreference");
_compatibleHypothesis.push_back("NETGEN_Parameters_2D");
_compatibleHypothesis.push_back("ViscousLayers2D");
_hypMaxElementArea = 0;
_hypLengthFromEdges = 0;
@ -148,6 +150,8 @@ bool NETGENPlugin_NETGEN_2D_ONLY::CheckHypothesis (SMESH_Mesh& aMesh,
_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;
@ -157,213 +161,12 @@ bool NETGENPlugin_NETGEN_2D_ONLY::CheckHypothesis (SMESH_Mesh& aMesh,
int nbHyps = bool(_hypMaxElementArea) + bool(_hypLengthFromEdges) + bool(_hypParameters );
if ( nbHyps > 1 )
aStatus = HYP_CONCURENT;
else if ( nbHyps == 1)
else
aStatus = HYP_OK;
return ( aStatus == HYP_OK );
}
//================================================================================
/*!
* \brief Fill netgen mesh with segments
* \retval SMESH_ComputeErrorPtr - error description
*/
//================================================================================
static TError addSegmentsToMesh(netgen::Mesh& ngMesh,
OCCGeometry& geom,
const TSideVector& wires,
SMESH_MesherHelper& helper,
vector< const SMDS_MeshNode* > & nodeVec)
{
// ----------------------------
// Check wires and count nodes
// ----------------------------
int nbNodes = 0;
double totalLength = 0;
for ( int iW = 0; iW < wires.size(); ++iW )
{
StdMeshers_FaceSidePtr wire = wires[ iW ];
if ( wire->MissVertexNode() )
{
// Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
// It seems that there is no reason for this limitation
// return TError
// (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
if (getenv("USER") && string("eap")==getenv("USER"))
cout << "Warning: NETGENPlugin_NETGEN_2D_ONLY : try to work with missing nodes on vertices"<<endl;
}
const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
if ( uvPtVec.size() != wire->NbPoints() )
return TError
(new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH,
SMESH_Comment("Unexpected nb of points on wire ") << iW
<< ": " << uvPtVec.size()<<" != "<<wire->NbPoints()));
nbNodes += wire->NbPoints();
totalLength += wire->Length();
}
nodeVec.reserve( nbNodes );
// -----------------
// Fill netgen mesh
// -----------------
// netgen::Box<3> bb = geom.GetBoundingBox();
// bb.Increase (bb.Diam()/10);
// ngMesh.SetLocalH (bb.PMin(), bb.PMax(), 0.5); // set grading
// map for nodes on vertices since they can be shared between wires
// ( issue 0020676, face_int_box.brep)
map<const SMDS_MeshNode*, int > node2ngID;
const int faceID = 1, solidID = 0;
if ( ngMesh.GetNFD() < 1 )
ngMesh.AddFaceDescriptor (FaceDescriptor(faceID, solidID, solidID, 0));
for ( int iW = 0; iW < wires.size(); ++iW )
{
StdMeshers_FaceSidePtr wire = wires[ iW ];
const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
const int nbSegments = wire->NbPoints() - 1;
// compute length of every segment
vector<double> segLen( nbSegments );
for ( int i = 0; i < nbSegments; ++i )
segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
int edgeID = 1, posID = -2;
bool isInternalWire = false;
for ( int i = 0; i < nbSegments; ++i ) // loop on segments
{
// Add the first point of a segment
const SMDS_MeshNode * n = uvPtVec[ i ].node;
const int posShapeID = n->getshapeId();
bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
// skip nodes on degenerated edges
if ( helper.IsDegenShape( posShapeID ) &&
helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
continue;
int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
if ( onVertex )
ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
if ( ngID1 > ngMesh.GetNP() )
{
MeshPoint mp( Point<3> (n->X(), n->Y(), n->Z()) );
ngMesh.AddPoint ( mp, 1, EDGEPOINT );
nodeVec.push_back( n );
}
else
{
ngID2 = ngMesh.GetNP() + 1;
if ( i > 0 ) // prev segment belongs to same wire
{
Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
prevSeg[1] = ngID1;
}
}
// Add the segment
Segment seg;
seg[0] = ngID1; // ng node id
seg[1] = ngID2; // ng node id
seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
seg.si = faceID; // = geom.fmap.FindIndex (face);
for ( int iEnd = 0; iEnd < 2; ++iEnd)
{
const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
seg.epgeominfo[ iEnd ].u = pnt.u;
seg.epgeominfo[ iEnd ].v = pnt.v;
// find out edge id and node parameter on edge
onVertex = ( pnt.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
if ( onVertex || posShapeID != posID )
{
// get edge id
double normParam = pnt.normParam;
if ( onVertex )
normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
const TopoDS_Edge& edge = wire->Edge( wire->EdgeIndex( normParam ));
edgeID = geom.emap.FindIndex( edge );
posID = posShapeID;
isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
// if ( onVertex ) // param on curve is different on each of two edges
// seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
}
seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
}
ngMesh.AddSegment (seg);
{
// restrict size of elements near the segment
SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
// get an average size of adjacent segments to avoid sharp change of
// element size (regression on issue 0020452, note 0010898)
int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
double avgH = ( segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ]) / 3;
NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, 0.5*(np1+np2), avgH );
}
#ifdef DUMP_SEGMENTS
cout << "Segment: " << seg.edgenr << endl
<< "\tp1: " << seg[0] << endl
<< "\tp2: " << seg[1] << endl
<< "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
<< "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
<< "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
<< "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
#endif
if ( isInternalWire )
{
swap (seg[0], seg[1]);
swap( seg.epgeominfo[0], seg.epgeominfo[1] );
seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
ngMesh.AddSegment (seg);
#ifdef DUMP_SEGMENTS
cout << "Segment: " << seg.edgenr << endl << "\tis REVRESE of the previous one" << endl;
#endif
}
} // loop on segments on a wire
// close chain of segments
if ( nbSegments > 0 )
{
Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire));
const SMDS_MeshNode * lastNode = uvPtVec.back().node;
lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
if ( lastSeg[1] > ngMesh.GetNP() )
{
MeshPoint mp( Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
ngMesh.AddPoint ( mp, 1, EDGEPOINT );
nodeVec.push_back( lastNode );
}
if ( isInternalWire )
{
Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
realLastSeg[0] = lastSeg[1];
}
}
} // loop on wires of a face
// add a segment instead of internal vertex
NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
NETGENPlugin_Mesher::addIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
ngMesh.CalcSurfacesOfNode();
return TError();
}
//=============================================================================
/*!
*Here we are going to use the NETGEN mesher
@ -386,12 +189,18 @@ bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
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
// ------------------------
const TopoDS_Face F = TopoDS::Face( aShape.Oriented( TopAbs_FORWARD ));
TError problem;
TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, problem );
TSideVector wires =
StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, problem, proxyMesh );
if ( problem && !problem->IsOK() )
return error( problem );
int nbWires = wires.size();
@ -459,7 +268,7 @@ bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
ngMesh->SetGlobalH (netgen::mparam.maxh);
vector< const SMDS_MeshNode* > nodeVec;
problem = addSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
problem = aMesher.AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
if ( problem && !problem->IsOK() )
return error( problem );
@ -506,19 +315,19 @@ bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
int nbNodes = ngMesh->GetNP();
int nbFaces = ngMesh->GetNSE();
int nbInputNodes = nodeVec.size();
nodeVec.resize( nbNodes, 0 );
int nbInputNodes = nodeVec.size()-1;
nodeVec.resize( nbNodes+1, 0 );
// add nodes
for ( int i = nbInputNodes + 1; i <= nbNodes; ++i )
for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
{
const MeshPoint& ngPoint = ngMesh->Point(i);
const MeshPoint& ngPoint = ngMesh->Point( ngID );
#ifdef NETGEN_NEW
SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
#else
SMDS_MeshNode * node = meshDS->AddNode(ngPoint.X(), ngPoint.Y(), ngPoint.Z());
#endif
nodeVec[ i-1 ] = node;
nodeVec[ ngID ] = node;
}
// create faces
@ -531,9 +340,9 @@ bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
for (j=1; j <= elem.GetNP(); ++j)
{
int pind = elem.PNum(j);
if ( pind-1 < 0 )
if ( pind < 1 )
break;
const SMDS_MeshNode* node = nodeVec.at(pind-1);
const SMDS_MeshNode* node = nodeVec[ pind ];
if ( reverse )
nodes[ nodes.size()-j ] = node;
else

4
src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
View File

@ -314,7 +314,7 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
if ( internals.hasInternalVertexInSolid() )
{
netgen::OCCGeometry occgeo;
NETGENPlugin_Mesher::addIntVerticesInSolids( occgeo,
NETGENPlugin_Mesher::AddIntVerticesInSolids( occgeo,
(netgen::Mesh&) *Netgen_mesh,
nodeVec,
internals);
@ -423,7 +423,7 @@ bool NETGENPlugin_NETGEN_3D::compute(SMESH_Mesh& aMesh,
if ( err )
{
SMESH_ComputeErrorPtr ce = NETGENPlugin_Mesher::readErrors(nodeVec);
SMESH_ComputeErrorPtr ce = NETGENPlugin_Mesher::ReadErrors(nodeVec);
if ( ce && !ce->myBadElements.empty() )
error( ce );
}