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GPUSPHGUI: meshing failure because of coincident free bodrers

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This commit is contained in:
eap 2017-11-30 14:14:12 +03:00
parent a7d2d23910
commit a80e8833b2
1 changed files with 59 additions and 10 deletions
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63
src/NETGENPlugin/NETGENPlugin_Remesher_2D.cxx
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@ -70,12 +70,14 @@ namespace
HoleFiller( SMESH_Mesh& meshDS );
~HoleFiller();
void AddHoleBorders( Ng_STL_Geometry * ngStlGeo );
void KeepHole() { myHole.clear(); }
void KeepHole() { myHole.clear(); myCapElems.clear(); }
void ClearCapElements() { myCapElems.clear(); }
private:
SMESHDS_Mesh* myMeshDS;
std::vector< std::vector< gp_XYZ > > myHole; // initial border nodes
std::vector< gp_XYZ > myInHolePos; // position inside each hole
std::vector< const SMDS_MeshElement* > myCapElems; // elements closing holes
};
//================================================================================
@ -106,9 +108,8 @@ namespace
if ( !isManifold )
{
// set bad faces into a compute error
SMESH_ComputeErrorPtr error =
SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH,
"Non-manifold mesh. Only manifold mesh can be re-meshed");
const char* text = "Non-manifold mesh. Only manifold mesh can be re-meshed";
SMESH_ComputeErrorPtr error = SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH, text );
SMESH::Controls::MultiConnection2D fun;
fun.SetMesh( myMeshDS );
SMDS_ElemIteratorPtr fIt = myMeshDS->elementsIterator( SMDSAbs_Face );
@ -119,8 +120,47 @@ namespace
error->myBadElements.push_back( f );
}
theMesh.GetSubMesh( theMesh.GetShapeToMesh() )->GetComputeError() = error;
throw SALOME_Exception( text );
}
throw SALOME_Exception("Non-manifold mesh. Only manifold mesh can be re-meshed");
// don't want to sew coincident borders
if ( !holes.empty() )
{
// define tolerance
double tol, len, sumLen = 0, minLen = 1e100;
int nbSeg = 0;
for ( size_t i = 0; i < holes.size(); ++i )
{
nbSeg += holes[i].size();
SMESH_NodeXYZ p1 = holes[i][0];
for ( size_t iP = 1; iP < holes[i].size(); ++iP )
{
SMESH_NodeXYZ p2 = holes[i][iP];
len = ( p1 - p2 ).Modulus();
sumLen += len;
minLen = Min( minLen, len );
p1 = p2;
}
}
double avgLen = sumLen / nbSeg;
if ( minLen > 1e-5 * avgLen )
tol = 0.1 * minLen; // minLen is not degenerate
else
tol = 0.1 * avgLen;
SMESH_MeshAlgos::CoincidentFreeBorders freeBords;
SMESH_MeshAlgos::FindCoincidentFreeBorders( *myMeshDS, tol, freeBords );
if ( !freeBords._coincidentGroups.empty() )
{
const char* text = "Can't re-meshed a mesh with coincident free edges";
SMESH_ComputeErrorPtr error = SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH, text );
for ( size_t i = 0; i < freeBords._borders.size(); ++i )
error->myBadElements.insert( error->myBadElements.end(),
freeBords._borders[i].begin(),
freeBords._borders[i].end() );
theMesh.GetSubMesh( theMesh.GetShapeToMesh() )->GetComputeError() = error;
throw SALOME_Exception( text );
}
}
// fill holes
@ -142,9 +182,10 @@ namespace
myInHolePos[i] = ( SMESH_NodeXYZ( newFaces[0]->GetNode(0)) +
SMESH_NodeXYZ( newFaces[0]->GetNode(1)) +
SMESH_NodeXYZ( newFaces[0]->GetNode(2)) ) / 3.;
myCapElems.insert( myCapElems.end(), newFaces.begin(), newFaces.end() );
// unmark to be able to remove them if meshing is canceled
for ( size_t iF = 0; iF < newFaces.size(); ++iF )
newFaces[iF]->setIsMarked( false );
// for ( size_t iF = 0; iF < newFaces.size(); ++iF )
// newFaces[iF]->setIsMarked( false );
}
}
// fix orientation
@ -191,6 +232,13 @@ namespace
if ( myMeshDS->NbNodes() < 3 )
return;
if ( !myCapElems.empty() ) // old mesh not removed; simply remove myCapElems
{
for ( size_t i = 0; i < myCapElems.size(); ++i )
myMeshDS->RemoveFreeElement( myCapElems[i], /*sm=*/0 );
return;
}
bool hasOrphanNodes = true;
const double tol = Max( 1e-3 * netgen::mparam.minh, Precision::Confusion() );
@ -572,6 +620,7 @@ bool NETGENPlugin_Remesher_2D::Compute(SMESH_Mesh& theMesh,
return error( "Error in Surface Meshing" );
// remove existing mesh
holeFiller.ClearCapElements();
SMDS_ElemIteratorPtr eIt = meshDS->elementsIterator();
while ( eIt->more() )
meshDS->RemoveFreeElement( eIt->next(), /*sm=*/0 );