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Copy identifications when extracting submesh #225

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Copy identifications when extracting submesh #225

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10 changes: 9 additions & 1 deletion libsrc/meshing/meshclass.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7323,7 +7323,7 @@ namespace netgen
{
// Copy the mesh into a new one, then delete unwanted elements
// Unused points are deleted by the Compress() function at the end
auto mesh_ptr = make_unique<Mesh>();
auto mesh_ptr = make_shared<Mesh>();
auto & mesh = *mesh_ptr;
mesh = (*this);

Expand Down Expand Up @@ -7401,6 +7401,14 @@ namespace netgen
if(!keep_point[pel.pnum])
mesh.pointelements.DeleteElement(npointelements-i-1);
}

// Copy identifications to submesh. Redundant identifications are removed in Compress()
auto & ident_to = mesh.GetIdentifications();
const auto & ident_from = this->GetIdentifications();
for(const auto pair : ident_from.GetPairs())
{
ident_to.Add(pair.I1(), pair.I2(), ident_from.GetName(pair.I3()), ident_from.GetType(pair.I3()));
}

mesh.Compress();
return mesh_ptr;
Expand Down