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022398: EDF 2783 SMESH: No end with viscous layer computation

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Prevent infinite loop in shrink()
This commit is contained in:
eap 2013-11-12 14:50:30 +00:00
parent 7ba5d8000f
commit 423f2b8731
1 changed files with 27 additions and 1 deletions
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28
src/StdMeshers/StdMeshers_ViscousLayers.cxx
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@ -41,6 +41,7 @@
#include "SMESH_ProxyMesh.hxx"
#include "SMESH_subMesh.hxx"
#include "SMESH_subMeshEventListener.hxx"
#include "StdMeshers_FaceSide.hxx"
#include <BRepAdaptor_Curve2d.hxx>
#include <BRep_Tool.hxx>
@ -780,6 +781,8 @@ namespace
bool isConcave( const TopoDS_Face& F, SMESH_MesherHelper& helper )
{
// if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
// return true;
gp_Vec2d drv1, drv2;
gp_Pnt2d p;
TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
@ -831,6 +834,26 @@ namespace
// }
}
}
// check angles at VERTEXes
TError error;
TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
for ( size_t iW = 0; iW < wires.size(); ++iW )
{
const int nbEdges = wires[iW]->NbEdges();
if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
continue;
for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
{
if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
int iE2 = ( iE1 + 1 ) % nbEdges;
while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
iE2 = ( iE2 + 1 ) % nbEdges;
double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
wires[iW]->Edge( iE2 ), F );
if ( angle < -5. * M_PI / 180. )
return true;
}
}
return false;
}
//--------------------------------------------------------------------------------
@ -3654,9 +3677,10 @@ bool _ViscousBuilder::shrink()
= isConcaveFace ? _SmoothNode::CENTROIDAL : _SmoothNode::LAPLACIAN;
while ( shrinked )
{
shriStep++;
// Move boundary nodes (actually just set new UV)
// -----------------------------------------------
dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep++ ); // debug
dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
shrinked = false;
for ( unsigned i = 0; i < lEdges.size(); ++i )
{
@ -3696,6 +3720,8 @@ bool _ViscousBuilder::shrink()
}
if ( badNb > 0 )
return error(SMESH_Comment("Can't shrink 2D mesh on face ") << f2sd->first );
if ( shriStep > 20 )
return error(SMESH_Comment("Infinite loop at shrinking 2D mesh on face ") << f2sd->first );
}
// No wrongly shaped faces remain; final smooth. Set node XYZ.