#include <off_io.h>

Inheritance diagram for libMesh::OFFIO:

Public Member Functions
	OFFIO (MeshBase &)
virtual void	read (const std::string &name)
Protected Member Functions
MeshBase &	mesh ()
void	set_n_partitions (unsigned int n_parts)
void	skip_comment_lines (std::istream &in, const char comment_start)
Protected Attributes
std::vector< bool >	elems_of_dimension
Private Member Functions
virtual void	read_stream (std::istream &in)

Detailed Description

This class is repsonsible for reading an unstructured, triangulated surface in the standard OFF OOGL format.

Definition at line 43 of file off_io.h.

Constructor & Destructor Documentation

libMesh::OFFIO::OFFIO ( MeshBase & mesh_in ) [inline, explicit]

Constructor. Takes a non-const Mesh reference which it will fill up with elements.

Definition at line 72 of file off_io.h.

                               :
  MeshInput<MeshBase> (mesh_in)
{}

Member Function Documentation

MeshBase & libMesh::MeshInput< MeshBase >::mesh ( ) [protected, inherited]

Returns the object as a writeable reference.

void libMesh::OFFIO::read ( const std::string & name ) [virtual]

Reads in an OFF OOGL data file based on the string you pass it.

Implements libMesh::MeshInput< MeshBase >.

Definition at line 35 of file off_io.C.

References read_stream().

Referenced by libMesh::NameBasedIO::read().

{
  std::ifstream in (name.c_str());

  read_stream(in);
}

void libMesh::OFFIO::read_stream ( std::istream & in ) [private, virtual]

Implementation of the read() function. This function is called by the public interface function and implements reading the file.

Definition at line 44 of file off_io.C.

References libMesh::MeshBase::add_elem(), libMesh::MeshBase::add_point(), libMesh::MeshBase::clear(), libMesh::libmesh_assert(), libMesh::MeshInput< MeshBase >::mesh(), libMesh::MeshBase::node_ptr(), libMesh::processor_id(), libMesh::Real, libMesh::DofObject::set_id(), libMesh::MeshBase::set_mesh_dimension(), libMesh::Elem::set_node(), and libMesh::x.

Referenced by read().

{
  // This is a serial-only process for now;
  // the Mesh should be read on processor 0 and
  // broadcast later
  libmesh_assert_equal_to (this->mesh().processor_id(), 0);

  // Get a reference to the mesh
  MeshBase& the_mesh = MeshInput<MeshBase>::mesh();

  // Clear any existing mesh data
  the_mesh.clear();

  // Check the input buffer
  libmesh_assert (in.good());

  unsigned int nn, ne, nf;

  std::string label;

  // Read the first string.  It should say "OFF"
  in >> label;

  libmesh_assert_equal_to (label, "OFF");

  // read the number of nodes, faces, and edges
  in >> nn >> nf >> ne;


  Real x=0., y=0., z=0.;

  // Read the nodes
  for (unsigned int n=0; n<nn; n++)
    {
      libmesh_assert (in.good());

      in >> x
         >> y
         >> z;

      the_mesh.add_point ( Point(x,y,z), n );
    }

  unsigned int nv, nid;

  // Read the elements
  for (unsigned int e=0; e<nf; e++)
    {
      libmesh_assert (in.good());

      // The number of vertices in the element
      in >> nv;

      libmesh_assert(nv == 2 || nv == 3);
      if (e == 0)
        {
          the_mesh.set_mesh_dimension(cast_int<unsigned char>(nv-1));
          if (nv == 3)
            {
#if LIBMESH_DIM < 2
              libmesh_error_msg("Cannot open dimension 2 mesh file when configured without 2D support.");
#endif
            }
        }

      Elem* elem;
      switch (nv)
        {
        case 2:
          elem = new Edge2;
          break;

        case 3:
          elem = new Tri3;
          break;

        default:
          libmesh_error_msg("Unsupported nv = " << nv);
        }

      elem->set_id(e);
      the_mesh.add_elem (elem);

      for (unsigned int i=0; i<nv; i++)
        {
          in >> nid;
          elem->set_node(i) = the_mesh.node_ptr(nid);
        }
    }
}

void libMesh::MeshInput< MeshBase >::set_n_partitions ( unsigned int n_parts ) [inline, protected, inherited]

Sets the number of partitions in the mesh. Typically this gets done by the partitioner, but some parallel file formats begin "pre-partitioned".

Definition at line 94 of file mesh_input.h.

References libMesh::MeshInput< MT >::mesh().

Referenced by libMesh::Nemesis_IO::read(), and libMesh::XdrIO::read().

{ this->mesh().set_n_partitions() = n_parts; }

void libMesh::MeshInput< MeshBase >::skip_comment_lines	(	std::istream &	in,
		const char	comment_start
	)		`[protected, inherited]`

Reads input from in, skipping all the lines that start with the character comment_start.

Referenced by libMesh::TetGenIO::read(), and libMesh::UCDIO::read_implementation().

Member Data Documentation

std::vector<bool> libMesh::MeshInput< MeshBase >::elems_of_dimension [protected, inherited]

A vector of bools describing what dimension elements have been encountered when reading a mesh.

Definition at line 100 of file mesh_input.h.

Referenced by libMesh::GMVIO::_read_one_cell(), libMesh::UNVIO::elements_in(), libMesh::UNVIO::max_elem_dimension_seen(), libMesh::AbaqusIO::max_elem_dimension_seen(), libMesh::AbaqusIO::read(), libMesh::Nemesis_IO::read(), libMesh::ExodusII_IO::read(), libMesh::GMVIO::read(), libMesh::VTKIO::read(), libMesh::AbaqusIO::read_elements(), libMesh::UCDIO::read_implementation(), libMesh::UNVIO::read_implementation(), libMesh::LegacyXdrIO::read_mesh(), and libMesh::XdrIO::read_serialized_connectivity().

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation