WriteTemplate.cpp

Go to the documentation of this file.

/**
 * MOAB, a Mesh-Oriented datABase, is a software component for creating,
 * storing and accessing finite element mesh data.
 *
 * Copyright 2004 Sandia Corporation. Under the terms of Contract
 * DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government
 * retains certain rights in this software.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 */
 
#ifdef WIN32
#ifdef _DEBUG
// turn off warnings that say they debugging identifier has been truncated
// this warning comes up when using some STL containers
#pragma warning( disable : 4786 )
#endif
#endif
 
#include "WriteTemplate.hpp"
 
#include <utility>
#include <algorithm>
#include <ctime>
#include <string>
#include <vector>
#include <cstdio>
#include <cstring>
#include <iostream>
 
#include "moab/Interface.hpp"
#include "moab/Range.hpp"
#include "moab/CN.hpp"
#include <cassert>
#include "Internals.hpp"
#include "ExoIIUtil.hpp"
#include "MBTagConventions.hpp"
#include "moab/WriteUtilIface.hpp"
 
namespace moab
{
 
WriterIface* WriteTemplate::factory( Interface* iface )
{
 return new WriteTemplate( iface );
}
 
WriteTemplate::WriteTemplate( Interface* impl ) : mbImpl( impl )
{
 assert( impl != NULL );
 
 impl->query_interface( mWriteIface );
 
 // Initialize in case tag_get_handle fails below
 //! Get and cache predefined tag handles
 int negone = -1;
 impl->tag_get_handle( MATERIAL_SET_TAG_NAME, 1, MB_TYPE_INTEGER, mMaterialSetTag, MB_TAG_SPARSE | MB_TAG_CREAT,
 &negone );
 
 impl->tag_get_handle( DIRICHLET_SET_TAG_NAME, 1, MB_TYPE_INTEGER, mDirichletSetTag, MB_TAG_SPARSE | MB_TAG_CREAT,
 &negone );
 
 impl->tag_get_handle( NEUMANN_SET_TAG_NAME, 1, MB_TYPE_INTEGER, mNeumannSetTag, MB_TAG_SPARSE | MB_TAG_CREAT,
 &negone );
 
 mGlobalIdTag = impl->globalId_tag();
 
 impl->tag_get_handle( "WriteTemplate element mark", 1, MB_TYPE_BIT, mEntityMark, MB_TAG_CREAT );
}
 
WriteTemplate::~WriteTemplate()
{
 mbImpl->release_interface( mWriteIface );
 mbImpl->tag_delete( mEntityMark );
}
 
void WriteTemplate::reset_matset( std::vector< WriteTemplate::MaterialSetData >& matset_info )
{
 std::vector< WriteTemplate::MaterialSetData >::iterator iter;
 
 for( iter = matset_info.begin(); iter != matset_info.end(); ++iter )
 delete( *iter ).elements;
}
 
ErrorCode WriteTemplate::write_file( const char* file_name,
 const bool /* overwrite (commented out to remove warning) */,
 const FileOptions& /*opts*/,
 const EntityHandle* ent_handles,
 const int num_sets,
 const std::vector< std::string >& /* qa_list */,
 const Tag* /* tag_list */,
 int /* num_tags */,
 int /* export_dimension */ )
{
 assert( 0 != mMaterialSetTag && 0 != mNeumannSetTag && 0 != mDirichletSetTag );
 
 // Check the file name
 if( NULL == strstr( file_name, ".template" ) ) return MB_FAILURE;
 
 std::vector< EntityHandle > matsets, dirsets, neusets;
 
 fileName = file_name;
 
 // Separate into material sets, dirichlet sets, neumann sets
 
 if( num_sets == 0 )
 {
 // Default to all defined sets
 Range this_range;
 mbImpl->get_entities_by_type_and_tag( 0, MBENTITYSET, &mMaterialSetTag, NULL, 1, this_range );
 std::copy( this_range.begin(), this_range.end(), std::back_inserter( matsets ) );
 this_range.clear();
 mbImpl->get_entities_by_type_and_tag( 0, MBENTITYSET, &mDirichletSetTag, NULL, 1, this_range );
 std::copy( this_range.begin(), this_range.end(), std::back_inserter( dirsets ) );
 this_range.clear();
 mbImpl->get_entities_by_type_and_tag( 0, MBENTITYSET, &mNeumannSetTag, NULL, 1, this_range );
 std::copy( this_range.begin(), this_range.end(), std::back_inserter( neusets ) );
 }
 else
 {
 int dummy;
 for( const EntityHandle* iter = ent_handles; iter < ent_handles + num_sets; ++iter )
 {
 if( MB_SUCCESS == mbImpl->tag_get_data( mMaterialSetTag, &( *iter ), 1, &dummy ) )
 matsets.push_back( *iter );
 else if( MB_SUCCESS == mbImpl->tag_get_data( mDirichletSetTag, &( *iter ), 1, &dummy ) )
 dirsets.push_back( *iter );
 else if( MB_SUCCESS == mbImpl->tag_get_data( mNeumannSetTag, &( *iter ), 1, &dummy ) )
 neusets.push_back( *iter );
 }
 }
 
 // If there is nothing to write just return.
 if( matsets.empty() && dirsets.empty() && neusets.empty() ) return MB_FILE_WRITE_ERROR;
 
 std::vector< WriteTemplate::MaterialSetData > matset_info;
 std::vector< WriteTemplate::DirichletSetData > dirset_info;
 std::vector< WriteTemplate::NeumannSetData > neuset_info;
 
 MeshInfo mesh_info;
 
 matset_info.clear();
 if( gather_mesh_information( mesh_info, matset_info, neuset_info, dirset_info, matsets, neusets, dirsets ) !=
 MB_SUCCESS )
 {
 reset_matset( matset_info );
 return MB_FAILURE;
 }
 
 // Try to open the file after gather mesh info succeeds
 if( /* Test for file open failure */ false )
 {
 reset_matset( matset_info );
 return MB_FAILURE;
 }
 
 if( initialize_file( mesh_info ) != MB_SUCCESS )
 {
 reset_matset( matset_info );
 return MB_FAILURE;
 }
 
 if( write_nodes( mesh_info.num_nodes, mesh_info.nodes, mesh_info.num_dim ) != MB_SUCCESS )
 {
 reset_matset( matset_info );
 return MB_FAILURE;
 }
 
 if( write_matsets( mesh_info, matset_info, neuset_info ) )
 {
 reset_matset( matset_info );
 return MB_FAILURE;
 }
 
 return MB_SUCCESS;
}
 
ErrorCode WriteTemplate::gather_mesh_information( MeshInfo& mesh_info,
 std::vector< WriteTemplate::MaterialSetData >& matset_info,
 std::vector< WriteTemplate::NeumannSetData >& neuset_info,
 std::vector< WriteTemplate::DirichletSetData >& dirset_info,
 std::vector< EntityHandle >& matsets,
 std::vector< EntityHandle >& neusets,
 std::vector< EntityHandle >& dirsets )
{
 std::vector< EntityHandle >::iterator vector_iter, end_vector_iter;
 
 mesh_info.num_nodes = 0;
 mesh_info.num_elements = 0;
 mesh_info.num_matsets = 0;
 
 int id = 0;
 
 vector_iter = matsets.begin();
 end_vector_iter = matsets.end();
 
 mesh_info.num_matsets = matsets.size();
 
 std::vector< EntityHandle > parent_meshsets;
 
 // Clean out the bits for the element mark
 mbImpl->tag_delete( mEntityMark );
 mbImpl->tag_get_handle( "WriteTemplate element mark", 1, MB_TYPE_BIT, mEntityMark, MB_TAG_CREAT );
 
 int highest_dimension_of_element_matsets = 0;
 
 for( vector_iter = matsets.begin(); vector_iter != matsets.end(); ++vector_iter )
 {
 WriteTemplate::MaterialSetData matset_data;
 matset_data.elements = new Range;
 
 // For the purpose of qa records, get the parents of these matsets
 if( mbImpl->get_parent_meshsets( *vector_iter, parent_meshsets ) != MB_SUCCESS ) return MB_FAILURE;
 
 // Get all Entity Handles in the mesh set
 Range dummy_range;
 mbImpl->get_entities_by_handle( *vector_iter, dummy_range, true );
 
 // Find the dimension of the last entity in this range
 Range::iterator entity_iter = dummy_range.end();
 --entity_iter;
 int this_dim = CN::Dimension( TYPE_FROM_HANDLE( *entity_iter ) );
 entity_iter = dummy_range.begin();
 while( entity_iter != dummy_range.end() && CN::Dimension( TYPE_FROM_HANDLE( *entity_iter ) ) != this_dim )
 ++entity_iter;
 
 if( entity_iter != dummy_range.end() )
 std::copy( entity_iter, dummy_range.end(), range_inserter( *( matset_data.elements ) ) );
 
 assert( matset_data.elements->begin() == matset_data.elements->end() ||
 CN::Dimension( TYPE_FROM_HANDLE( *( matset_data.elements->begin() ) ) ) == this_dim );
 
 // Get the matset's id
 if( mbImpl->tag_get_data( mMaterialSetTag, &( *vector_iter ), 1, &id ) != MB_SUCCESS )
 {
 MB_SET_ERR( MB_FAILURE, "Couldn't get matset id from a tag for an element matset" );
 }
 
 matset_data.id = id;
 matset_data.number_attributes = 0;
 
 // Iterate through all the elements in the meshset
 Range::iterator elem_range_iter, end_elem_range_iter;
 elem_range_iter = matset_data.elements->begin();
 end_elem_range_iter = matset_data.elements->end();
 
 // Get the entity type for this matset, verifying that it's the same for all elements
 // THIS ASSUMES HANDLES SORT BY TYPE!!!
 EntityType entity_type = TYPE_FROM_HANDLE( *elem_range_iter );
 --end_elem_range_iter;
 if( entity_type != TYPE_FROM_HANDLE( *( end_elem_range_iter++ ) ) )
 {
 MB_SET_ERR( MB_FAILURE, "Entities in matset " << id << " not of common type" );
 }
 
 int dimension = CN::Dimension( entity_type );
 
 if( dimension > highest_dimension_of_element_matsets ) highest_dimension_of_element_matsets = dimension;
 
 matset_data.moab_type = mbImpl->type_from_handle( *( matset_data.elements->begin() ) );
 if( MBMAXTYPE == matset_data.moab_type ) return MB_FAILURE;
 
 std::vector< EntityHandle > tmp_conn;
 mbImpl->get_connectivity( &( *( matset_data.elements->begin() ) ), 1, tmp_conn );
 matset_data.element_type =
 ExoIIUtil::get_element_type_from_num_verts( tmp_conn.size(), entity_type, dimension );
 
 if( matset_data.element_type == EXOII_MAX_ELEM_TYPE )
 {
 MB_SET_ERR( MB_FAILURE, "Element type in matset " << id << " didn't get set correctly" );
 }
 
 matset_data.number_nodes_per_element = ExoIIUtil::VerticesPerElement[matset_data.element_type];
 
 // Number of nodes for this matset
 matset_data.number_elements = matset_data.elements->size();
 
 // Total number of elements
 mesh_info.num_elements += matset_data.number_elements;
 
 // Get the nodes for the elements
 mWriteIface->gather_nodes_from_elements( *matset_data.elements, mEntityMark, mesh_info.nodes );
 
 if( !neusets.empty() )
 {
 // If there are neusets, keep track of which elements are being written out
 for( Range::iterator iter = matset_data.elements->begin(); iter != matset_data.elements->end(); ++iter )
 {
 unsigned char bit = 0x1;
 mbImpl->tag_set_data( mEntityMark, &( *iter ), 1, &bit );
 }
 }
 
 matset_info.push_back( matset_data );
 }
 
 // If user hasn't entered dimension, we figure it out
 if( mesh_info.num_dim == 0 )
 {
 // Never want 1 or zero dimensions
 if( highest_dimension_of_element_matsets < 2 )
 mesh_info.num_dim = 3;
 else
 mesh_info.num_dim = highest_dimension_of_element_matsets;
 }
 
 Range::iterator range_iter, end_range_iter;
 range_iter = mesh_info.nodes.begin();
 end_range_iter = mesh_info.nodes.end();
 
 mesh_info.num_nodes = mesh_info.nodes.size();
 
 //------dirsets--------
 
 vector_iter = dirsets.begin();
 end_vector_iter = dirsets.end();
 
 for( ; vector_iter != end_vector_iter; ++vector_iter )
 {
 WriteTemplate::DirichletSetData dirset_data;
 dirset_data.id = 0;
 dirset_data.number_nodes = 0;
 
 // Get the dirset's id
 if( mbImpl->tag_get_data( mDirichletSetTag, &( *vector_iter ), 1, &id ) != MB_SUCCESS )
 {
 MB_SET_ERR( MB_FAILURE, "Couldn't get id tag for dirset " << id );
 }
 
 dirset_data.id = id;
 
 std::vector< EntityHandle > node_vector;
 // Get the nodes of the dirset that are in mesh_info.nodes
 if( mbImpl->get_entities_by_handle( *vector_iter, node_vector, true ) != MB_SUCCESS )
 {
 MB_SET_ERR( MB_FAILURE, "Couldn't get nodes in dirset " << id );
 }
 
 std::vector< EntityHandle >::iterator iter, end_iter;
 iter = node_vector.begin();
 end_iter = node_vector.end();
 
 unsigned char node_marked = 0;
 ErrorCode result;
 for( ; iter != end_iter; ++iter )
 {
 if( TYPE_FROM_HANDLE( *iter ) != MBVERTEX ) continue;
 result = mbImpl->tag_get_data( mEntityMark, &( *iter ), 1, &node_marked );MB_CHK_SET_ERR( result, "Couldn't get mark data" );
 
 if( 0x1 == node_marked ) dirset_data.nodes.push_back( *iter );
 }
 
 dirset_data.number_nodes = dirset_data.nodes.size();
 dirset_info.push_back( dirset_data );
 }
 
 //------neusets--------
 vector_iter = neusets.begin();
 end_vector_iter = neusets.end();
 
 for( ; vector_iter != end_vector_iter; ++vector_iter )
 {
 WriteTemplate::NeumannSetData neuset_data;
 
 // Get the neuset's id
 if( mbImpl->tag_get_data( mNeumannSetTag, &( *vector_iter ), 1, &id ) != MB_SUCCESS ) return MB_FAILURE;
 
 neuset_data.id = id;
 neuset_data.mesh_set_handle = *vector_iter;
 
 // Get the sides in two lists, one forward the other reverse; starts with forward sense
 // by convention
 Range forward_elems, reverse_elems;
 if( get_neuset_elems( *vector_iter, 0, forward_elems, reverse_elems ) == MB_FAILURE ) return MB_FAILURE;
 
 ErrorCode result = get_valid_sides( forward_elems, 1, neuset_data );MB_CHK_SET_ERR( result, "Couldn't get valid sides data" );
 result = get_valid_sides( reverse_elems, -1, neuset_data );MB_CHK_SET_ERR( result, "Couldn't get valid sides data" );
 
 neuset_data.number_elements = neuset_data.elements.size();
 neuset_info.push_back( neuset_data );
 }
 
 return MB_SUCCESS;
}
 
ErrorCode WriteTemplate::get_valid_sides( Range& elems, const int sense, WriteTemplate::NeumannSetData& neuset_data )
{
 // This is where we see if underlying element of side set element is included in output
 
 unsigned char element_marked = 0;
 ErrorCode result;
 for( Range::iterator iter = elems.begin(); iter != elems.end(); ++iter )
 {
 // Should insert here if "side" is a quad/tri on a quad/tri mesh
 result = mbImpl->tag_get_data( mEntityMark, &( *iter ), 1, &element_marked );MB_CHK_SET_ERR( result, "Couldn't get mark data" );
 
 if( 0x1 == element_marked )
 {
 neuset_data.elements.push_back( *iter );
 
 // TJT TODO: the sense should really be # edges + 1or2
 neuset_data.side_numbers.push_back( ( sense == 1 ? 1 : 2 ) );
 }
 else
 { // Then "side" is probably a quad/tri on a hex/tet mesh
 std::vector< EntityHandle > parents;
 int dimension = CN::Dimension( TYPE_FROM_HANDLE( *iter ) );
 
 // Get the adjacent parent element of "side"
 if( mbImpl->get_adjacencies( &( *iter ), 1, dimension + 1, false, parents ) != MB_SUCCESS )
 {
 MB_SET_ERR( MB_FAILURE, "Couldn't get adjacencies for neuset" );
 }
 
 if( !parents.empty() )
 {
 // Make sure the adjacent parent element will be output
 for( unsigned int k = 0; k < parents.size(); k++ )
 {
 result = mbImpl->tag_get_data( mEntityMark, &( parents[k] ), 1, &element_marked );MB_CHK_SET_ERR( result, "Couldn't get mark data" );
 
 int side_no, this_sense, this_offset;
 if( 0x1 == element_marked &&
 mbImpl->side_number( parents[k], *iter, side_no, this_sense, this_offset ) == MB_SUCCESS &&
 this_sense == sense )
 {
 neuset_data.elements.push_back( parents[k] );
 neuset_data.side_numbers.push_back( side_no + 1 );
 break;
 }
 }
 }
 else
 {
 MB_SET_ERR( MB_FAILURE, "No parent element exists for element in neuset " << neuset_data.id );
 }
 }
 }
 
 return MB_SUCCESS;
}
 
ErrorCode WriteTemplate::write_nodes( const int num_nodes, const Range& nodes, const int dimension )
{
 // See if should transform coordinates
 ErrorCode result;
 Tag trans_tag;
 result = mbImpl->tag_get_handle( MESH_TRANSFORM_TAG_NAME, 16, MB_TYPE_DOUBLE, trans_tag );
 bool transform_needed = true;
 if( result == MB_TAG_NOT_FOUND ) transform_needed = false;
 
 int num_coords_to_fill = transform_needed ? 3 : dimension;
 
 std::vector< double* > coord_arrays( 3 );
 coord_arrays[0] = new double[num_nodes];
 coord_arrays[1] = new double[num_nodes];
 coord_arrays[2] = NULL;
 
 if( num_coords_to_fill == 3 ) coord_arrays[2] = new double[num_nodes];
 
 result = mWriteIface->get_node_coords( dimension, num_nodes, nodes, mGlobalIdTag, 0, coord_arrays );
 if( result != MB_SUCCESS )
 {
 delete[] coord_arrays[0];
 delete[] coord_arrays[1];
 if( coord_arrays[2] ) delete[] coord_arrays[2];
 return result;
 }
 
 if( transform_needed )
 {
 double trans_matrix[16];
 const EntityHandle mesh = 0;
 result = mbImpl->tag_get_data( trans_tag, &mesh, 1, trans_matrix );MB_CHK_SET_ERR( result, "Couldn't get transform data" );
 
 for( int i = 0; i < num_nodes; i++ )
 {
 double vec1[3];
 double vec2[3];
 
 vec2[0] = coord_arrays[0][i];
 vec2[1] = coord_arrays[1][i];
 vec2[2] = coord_arrays[2][i];
 
 for( int row = 0; row < 3; row++ )
 {
 vec1[row] = 0.0;
 for( int col = 0; col < 3; col++ )
 vec1[row] += ( trans_matrix[( row * 4 ) + col] * vec2[col] );
 }
 
 coord_arrays[0][i] = vec1[0];
 coord_arrays[1][i] = vec1[1];
 coord_arrays[2][i] = vec1[2];
 }
 }
 
 // Write the nodes
 
 /* Template - write nodes to file here in some way */
 
 // Clean up
 delete[] coord_arrays[0];
 delete[] coord_arrays[1];
 if( coord_arrays[2] ) delete[] coord_arrays[2];
 
 return MB_SUCCESS;
}
 
ErrorCode WriteTemplate::write_matsets(
 MeshInfo& /* mesh_info (commented out to remove warning) */,
 std::vector< WriteTemplate::MaterialSetData >& matset_data,
 std::vector< WriteTemplate::NeumannSetData >& /* neuset_data (commented out to remove warning) */ )
{
 unsigned int i;
 std::vector< int > connect;
 const EntityHandle* connecth;
 int num_connecth;
 ErrorCode result;
 
 // Don't usually have anywhere near 31 nodes per element
 connect.reserve( 31 );
 Range::iterator rit;
 
 WriteTemplate::MaterialSetData matset;
 for( i = 0; i < matset_data.size(); i++ )
 {
 matset = matset_data[i];
 
 for( rit = matset.elements->begin(); rit != matset.elements->end(); ++rit )
 {
 // Get the connectivity of this element
 result = mbImpl->get_connectivity( *rit, connecth, num_connecth );
 if( MB_SUCCESS != result ) return result;
 
 // Get the vertex ids
 result = mbImpl->tag_get_data( mGlobalIdTag, connecth, num_connecth, &connect[0] );
 if( MB_SUCCESS != result ) return result;
 
 // Write the data
 /* Template - write element connectivity here */
 
 if( /* Template - check for error condition! */ false ) return MB_FAILURE;
 }
 }
 
 return MB_SUCCESS;
}
 
ErrorCode WriteTemplate::initialize_file( MeshInfo& mesh_info )
{
 // Perform the initializations
 
 int coord_size, ncoords;
 
 coord_size = mesh_info.num_dim;
 std::cout << "Coord_size = " << coord_size << std::endl;
 /* Template - write coord size */
 
 ncoords = mesh_info.num_nodes;
 std::cout << "ncoords = " << ncoords << std::endl;
 /* Template - write num nodes*/
 
 /* Template - write information on the element types & numbers (depends
 on material and other sets) */
 
 /* Node coordinate arrays: */
 /* Template - initialize variable to hold coordinate arrays */
 
 return MB_SUCCESS;
}
 
ErrorCode WriteTemplate::open_file( const char* filename )
{
 // Not a valid filename
 if( strlen( (const char*)filename ) == 0 )
 {
 MB_SET_ERR( MB_FAILURE, "Output filename not specified" );
 }
 
 /* Template - open file & store somewhere */
 
 // File couldn't be opened
 if( /* Template - check for file open error here! */ false )
 {
 MB_SET_ERR( MB_FAILURE, "Cannot open " << filename );
 }
 
 return MB_SUCCESS;
}
 
ErrorCode WriteTemplate::get_neuset_elems( EntityHandle neuset,
 int current_sense,
 Range& forward_elems,
 Range& reverse_elems )
{
 Range neuset_elems, neuset_meshsets;
 
 // Get the sense tag; don't need to check return, might be an error if the tag
 // hasn't been created yet
 Tag sense_tag = 0;
 mbImpl->tag_get_handle( "SENSE", 1, MB_TYPE_INTEGER, sense_tag );
 
 // Get the entities in this set
 ErrorCode result = mbImpl->get_entities_by_handle( neuset, neuset_elems, true );
 if( MB_FAILURE == result ) return result;
 
 // Now remove the meshsets into the neuset_meshsets; first find the first meshset,
 Range::iterator range_iter = neuset_elems.begin();
 while( TYPE_FROM_HANDLE( *range_iter ) != MBENTITYSET && range_iter != neuset_elems.end() )
 ++range_iter;
 
 // Then, if there are some, copy them into neuset_meshsets and erase from neuset_elems
 if( range_iter != neuset_elems.end() )
 {
 std::copy( range_iter, neuset_elems.end(), range_inserter( neuset_meshsets ) );
 neuset_elems.erase( range_iter, neuset_elems.end() );
 }
 
 // OK, for the elements, check the sense of this set and copy into the right range
 // (if the sense is 0, copy into both ranges)
 
 // Need to step forward on list until we reach the right dimension
 Range::iterator dum_it = neuset_elems.end();
 --dum_it;
 int target_dim = CN::Dimension( TYPE_FROM_HANDLE( *dum_it ) );
 dum_it = neuset_elems.begin();
 while( target_dim != CN::Dimension( TYPE_FROM_HANDLE( *dum_it ) ) && dum_it != neuset_elems.end() )
 ++dum_it;
 
 if( current_sense == 1 || current_sense == 0 )
 std::copy( dum_it, neuset_elems.end(), range_inserter( forward_elems ) );
 if( current_sense == -1 || current_sense == 0 )
 std::copy( dum_it, neuset_elems.end(), range_inserter( reverse_elems ) );
 
 // Now loop over the contained meshsets, getting the sense of those and calling this
 // function recursively
 for( range_iter = neuset_meshsets.begin(); range_iter != neuset_meshsets.end(); ++range_iter )
 {
 // First get the sense; if it's not there, by convention it's forward
 int this_sense;
 if( 0 == sense_tag || MB_FAILURE == mbImpl->tag_get_data( sense_tag, &( *range_iter ), 1, &this_sense ) )
 this_sense = 1;
 
 // Now get all the entities on this meshset, with the proper (possibly reversed) sense
 get_neuset_elems( *range_iter, this_sense * current_sense, forward_elems, reverse_elems );
 }
 
 return result;
}
 
} // namespace moab