void BulkData::destroy_relation( Entity & e1 , Entity & e2 , unsigned kind )
{
// When removing a relationship may need to
// remove part membership and set field relation pointer to NULL
PartSet del ;
bool to_e1 = false ;
std::vector<Relation>::iterator i ;
for ( i = e1.m_relation.end() ; i != e1.m_relation.begin() ; ) {
--i ;
if ( i->entity() == & e2 && i->kind() == kind ) {
if ( i->forward() ) {
clear_field_relations( e1 , i->entity_type() ,
i->identifier() ,
i->kind() );
deduce_part_relations( e1, e2, i->identifier(), i->kind(), del );
}
i = e1.m_relation.erase( i );
}
}
for ( i = e2.m_relation.end() ; i != e2.m_relation.begin() ; ) {
--i ;
if ( i->entity() == & e1 && i->kind() == kind ) {
if ( i->forward() ) {
clear_field_relations( e2 , i->entity_type() ,
i->identifier() ,
i->kind() );
deduce_part_relations( e2, e1, i->identifier(), i->kind(), del );
to_e1 = true ;
}
i = e2.m_relation.erase( i );
}
}
Entity & e_to = to_e1 ? e1 : e2 ;
{
PartSet keep ;
deduce_part_relations( e_to , keep );
if ( ! keep.empty() ) {
// Eliminate the 'keep' from the accumulated 'del'
for ( PartSet::iterator j = del.end() ; j != del.begin() ; ) {
--j ;
if ( contain( keep , **j ) ) { j = del.erase( j ); }
}
}
}
if ( ! del.empty() ) {
PartSet add ;
internal_change_entity_parts( e_to , add , del );
}
}
void BulkData::destroy_relation( Entity & e_from , Entity & e_to )
{
static const char method[]= "stk::mesh::BulkData::destroy_relation" ;
assert_ok_to_modify( method );
assert_valid_relation( method , *this , e_from , e_to );
//------------------------------
// When removing a relationship may need to
// remove part membership and set field relation pointer to NULL
PartVector del , keep ;
for ( PairIterRelation i = e_to.relations() ; i.first != i.second ; ++(i.first) ) {
if ( !( i.first->entity() == & e_from ) &&
( e_to.entity_rank() < i.first->entity_rank() ) )
{
induced_part_membership( * i.first->entity(), del, e_to.entity_rank(),
i.first->identifier(), keep );
}
}
for ( PairIterRelation i = e_from.relations() ; i.first != i.second ; ++(i.first) ) {
if ( i.first->entity() == & e_to ) {
induced_part_membership( e_from, keep, e_to.entity_rank(),
i.first->identifier(), del );
clear_field_relations( e_from , e_to.entity_rank() ,
i.first->identifier() );
}
}
//------------------------------
// 'keep' contains the parts deduced from kept relations
// 'del' contains the parts deduced from deleted relations
// that are not in 'keep'
// Only remove these part memberships the entity is not shared.
// If the entity is shared then wait until modificaton_end_synchronize.
//------------------------------
if ( ! del.empty() && (parallel_size() < 2 || e_to.sharing().empty()) ) {
PartVector add ;
internal_change_entity_parts( e_to , add , del );
}
//delete relations from the entities
m_entity_repo.destroy_relation( e_from, e_to);
}
