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0021429: EDF 2027 NETGENPLUGIN: Regression in Netgen2D mesh leads to failure in GHS3D computation

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fix search of a node for edge extremities on closed edges
This commit is contained in:
eap 2011-11-18 15:02:54 +00:00
parent 446f06b504
commit fc381bae17
1 changed files with 42 additions and 21 deletions
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47
src/NETGEN/netgen49ForSalome.patch
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@ -333,11 +333,24 @@ diff -Naur netgen-4.9.13_orig/libsrc/occ/occgenmesh.cpp netgen-4.9.13_new/libsrc
if (geom.vmap.FindIndex(TopExp::FirstVertex (edge)) ==
geom.vmap.FindIndex(TopExp::LastVertex (edge)))
@@ -481,13 +499,45 @@
@@ -479,15 +497,64 @@
}
else
{
Point<3> fp = occ2ng (BRep_Tool::Pnt (TopExp::FirstVertex (edge)));
Point<3> lp = occ2ng (BRep_Tool::Pnt (TopExp::LastVertex (edge)));
- Point<3> fp = occ2ng (BRep_Tool::Pnt (TopExp::FirstVertex (edge)));
- Point<3> lp = occ2ng (BRep_Tool::Pnt (TopExp::LastVertex (edge)));
+ TopoDS_Iterator vIt( edge, false );
+ TopoDS_Vertex v1 = TopoDS::Vertex( vIt.Value() ); vIt.Next();
+ TopoDS_Vertex v2 = TopoDS::Vertex( vIt.Value() );
+ if ( v1.Orientation() == TopAbs_REVERSED )
+ std::swap( v1, v2 );
+ const bool isClosedEdge = v1.IsSame( v2 );
+
+ Point<3> fp = occ2ng (BRep_Tool::Pnt (v1));
+ Point<3> lp = occ2ng (BRep_Tool::Pnt (v2));
+ double tol2 = std::min( eps*eps, 1e-6 * Dist2( fp, lp ));
+ if ( isClosedEdge )
+ tol2 = BRep_Tool::Tolerance( v1 ) * BRep_Tool::Tolerance( v1 );
pnums[0] = -1;
pnums.Last() = -1;
@ -348,40 +361,48 @@ diff -Naur netgen-4.9.13_orig/libsrc/occ/occgenmesh.cpp netgen-4.9.13_new/libsrc
+ if (Dist2 (mesh[pi], fp) < tol2) pnums[0] = pi;
+ if (Dist2 (mesh[pi], lp) < tol2) pnums.Last() = pi;
+ }
+ if ( pnums[0] == pnums.Last() )
+ pnums[0] = -1;
+ if (( isClosedEdge && pnums[0] != pnums.Last() ) ||
+ ( !isClosedEdge && pnums[0] == pnums.Last() ))
+ pnums[0] = pnums.Last() = -1;
+ if ( pnums[0] == -1 || pnums.Last() == -1 )
+ {
+ // take into account a possible large gap between a vertex and an edge curve
+ // and a large vertex tolerance covering the whole edge
+ // end and a large vertex tolerance covering the whole edge
+ if ( pnums[0] == -1 )
+ {
+ double tol = BRep_Tool::Tolerance( TopExp::FirstVertex (edge));
+ double tol = BRep_Tool::Tolerance( v1 );
+ for (PointIndex pi = 1; pi < first_ep; pi++)
+ if (pi != pnums.Last() && Dist2 (mesh[pi], fp) < 2*tol*tol)
+ pnums[0] = pi;
+
+ if ( pnums[0] == -1 )
+ pnums[0] = geom.vmap.FindIndex (TopExp::FirstVertex (edge));
+ pnums[0] = first_ep-1- nvertices + geom.vmap.FindIndex ( v1 );
+ }
+ if ( isClosedEdge )
+ {
+ pnums.Last() = pnums[0];
+ }
+ else
+ {
+ if ( pnums.Last() == -1 )
+ {
+ double tol = BRep_Tool::Tolerance( TopExp::LastVertex (edge));
+ double tol = BRep_Tool::Tolerance( v2 );
+ for (PointIndex pi = 1; pi < first_ep; pi++)
+ if (pi != pnums[0] && Dist2 (mesh[pi], lp) < 2*tol*tol)
+ pnums.Last() = pi;
+
+ if ( pnums.Last() == -1 )
+ pnums.Last() = geom.vmap.FindIndex (TopExp::LastVertex (edge));
+ pnums.Last() = first_ep-1-nvertices + geom.vmap.FindIndex ( v2 );
+ }
+
+ if ( Dist2( fp, mesh[PointIndex(pnums[0])]) >
+ Dist2( lp, mesh[PointIndex(pnums.Last())]))
+ std::swap( pnums[0], pnums.Last() );
+ }
}
}
@@ -633,7 +683,8 @@
@@ -633,7 +700,8 @@
}
(*testout) << "mesh face " << k << endl;
@ -391,7 +412,7 @@ diff -Naur netgen-4.9.13_orig/libsrc/occ/occgenmesh.cpp netgen-4.9.13_new/libsrc
geom.facemeshstatus[k-1] = -1;
@@ -901,7 +952,8 @@
@@ -901,7 +969,8 @@
// if (k != 36) continue;
// (*testout) << "optimize face " << k << endl;
@ -401,7 +422,7 @@ diff -Naur netgen-4.9.13_orig/libsrc/occ/occgenmesh.cpp netgen-4.9.13_new/libsrc
FaceDescriptor & fd = mesh.GetFaceDescriptor(k);
@@ -1456,3 +1508,4 @@
@@ -1456,3 +1525,4 @@
}
#endif