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Add subdomain id from libMesh to the vtk files #179

merged 1 commit into from

2 participants


print out subdomain ids in vtk format.
the patch resembles #145


Seems straightforward enough. Have you tested it?


not tested the whole libmesh testsuite, but it is working for me in this project


I ran the libmesh examples that use VTK, and they seemed to work OK. Thanks for the patch.

@jwpeterson jwpeterson merged commit b0ea174 into from

your welcome!
btw, i would be interested in having the possibility to print MONOMIAL CONSTANT variables as cell values instead of interpolating them to point values matching the grid.
to my knowledge, this is not possible whether the io format in libmesh, is it correct?
i can work on a patch for that (at least for VTKIO), would you be interested in including it?

@capitalaslash capitalaslash deleted the branch
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Commits on Dec 5, 2013
  1. @capitalaslash
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Showing with 6 additions and 0 deletions.
  1. +6 −0 src/mesh/vtk_io.C
6 src/mesh/vtk_io.C
@@ -216,6 +216,10 @@ void VTKIO::cells_to_vtk()
+ vtkSmartPointer<vtkIntArray> subdomain_id = vtkSmartPointer<vtkIntArray>::New();
+ subdomain_id->SetName("subdomain_id");
+ subdomain_id->SetNumberOfComponents(1);
MeshBase::const_element_iterator it = mesh.active_local_elements_begin();
const MeshBase::const_element_iterator end = mesh.active_local_elements_end();
for (; it != end; ++it, ++active_element_counter)
@@ -268,10 +272,12 @@ void VTKIO::cells_to_vtk()
vtkIdType vtkcellid = cells->InsertNextCell(pts);
types[active_element_counter] = this->get_elem_type(elem->type());
elem_id->InsertTuple1(vtkcellid, elem->id());
+ subdomain_id->InsertTuple1(vtkcellid, elem->subdomain_id());
} // end loop over active elements
_vtk_grid->SetCells(&types[0], cells);
+ _vtk_grid->GetCellData()->AddArray(subdomain_id);
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