[cgma-dev] copying iGeom entities in occ...

[shriwise]

A little more info. Looks like this problem comes from the finish_copy 
call in GMT. If I comment the lines in blue, my new functions for 
copying tag data from one entity to another work as expected.

My thought is to add a flags for these functions with regards to copying 
entity tag data/ attribute info. In the GMT functions the default will 
maintain the status quo (do not copy the attribute data) whereas in the 
iGeom interface the default will be to copy the tag/attribute data. Does 
this sound acceptable for now? As of yet this is the only change I will 
need to make outside of the itaps dir in CGM.

Cheers,

Patrick

CubitStatus GeometryModifyTool::finish_copy( TopologyBridge *&new_bridge,
                                              TopologyBridge *old_bridge )
{
   //Remove attributes on underlying entities of virtual geometry
   //entities which do not have corresponding RefEntities.
   DLIList<TopologyBridge*> bridge_list;
   bridge_list.append( old_bridge );
   GeometryQueryTool::instance()->ige_remove_attributes( bridge_list );

//Remove attributes on original entity and children
   DLIList<RefEntity*> child_list;
RefEntity *ref_ent = CAST_TO( old_bridge->topology_entity(), RefEntity );
   ref_ent->get_all_child_ref_entities( child_list );
   //child_list.append( ref_ent );
   CubitAttribUser::clear_all_simple_attrib( child_list );
   child_list.clean_out();
   child_list.append( ref_ent );
   CubitAttribUser::clear_all_simple_attrib( child_list );


   //Restore virtual
   //Could create virtual geometry here so the Topology Bridge can change
   bridge_list.clean_out();
   bridge_list.append( new_bridge );
   TopologyBridge *tmp_bridge_before = new_bridge;
   GeometryQueryTool::instance()->ige_import_geom( bridge_list );
   assert( bridge_list.size() == 1 );
   if( tmp_bridge_before != bridge_list.get() )
     new_bridge = bridge_list.get();

   //make the RefEntities
   Curve *curve = NULL;
   Surface *surface = NULL;
   Lump *lump = NULL;
   BodySM *body = NULL;

   RefEntity *new_ref_ent = NULL;
   if( (curve = CAST_TO( new_bridge, Curve ) ) != NULL )
     new_ref_ent = GeometryQueryTool::instance()->make_RefEdge( curve );
   else if( (surface = CAST_TO( new_bridge, Surface) ) != NULL )
     new_ref_ent = GeometryQueryTool::instance()->make_RefFace( surface );
   else if( (lump = CAST_TO( new_bridge, Lump) ) != NULL )
     new_ref_ent = GeometryQueryTool::instance()->make_Body( 
lump->bodysm() );
   else if( (body = CAST_TO( new_bridge, BodySM) ) != NULL )
     new_ref_ent = GeometryQueryTool::instance()->make_Body( body );

   //actuate the attributes on everything
   child_list.clean_out();
   new_ref_ent->get_all_child_ref_entities( child_list );
   child_list.append( new_ref_ent );
   GeometryQueryTool::import_actuate( child_list );

   //Remove attributes on new entity and children
   child_list.clean_out();
   new_ref_ent->get_all_child_ref_entities( child_list );
   CubitAttribUser::clear_all_simple_attrib( child_list );
   child_list.clean_out();
   child_list.append( new_ref_ent );
   CubitAttribUser::clear_all_simple_attrib( child_list );

   CGMApp::instance()->restore_previous_attribute_states();
   return CUBIT_SUCCESS;
}

On 08/05/2014 03:18 PM, shriwise wrote:
> Just checked and this fails when built w/ CUBIT as well.
>
> Patrick
> On 08/05/2014 03:13 PM, shriwise wrote:
>>
>> Hi all,
>>
>> I just ran into an interesting problem in CGM built with OCC. When an 
>> entity is copied, the original loses all user-applied tag information 
>> (or so it seems). I understand why a copy might not keep data from 
>> the original, but for the data to disappear from the original 
>> altogether seems like incorrect behaviour to me.
>>
>>
>> I wrote a test as an example of this below. The test fails on the red 
>> line. Any ideas as to why? I've tracked the number of tags on the 
>> entity and they seem to disappear in line 5804 of iGeom_CGMA.cc.
>>
>> Any help or insight for this would be very appreciated! I'm close to 
>> finishing my updates to the iGeom interface and this seems to be the 
>> last piece of the puzzle.
>>
>>
>> bool tag_copied_ent_test(iGeom_Instance geom)
>> {
>>
>>   int err;
>>
>>   //create a tag
>>   iBase_TagHandle test_tag;
>>   std::string name("test_tag");
>>   iGeom_createTag(geom, &name[0], 1, iBase_INTEGER, &test_tag, &err, 
>> name.length());
>>   CHECK( "ERROR: could not create tag" );
>>
>>   //create a test entity
>>   iBase_EntityHandle cyl;
>>   iGeom_createCylinder(geom, 5.0, 5.0, 0.0, &cyl, &err);
>>   CHECK( "ERROR: could not create the cylinder" );
>>
>>   //set a value for this tag on the original
>>   int value = 6;
>>   iGeom_setIntData(geom, cyl, test_tag, value, &err);
>>   CHECK( "ERROR: could not set the tag data" );
>>
>>   //create a copy
>>   iBase_EntityHandle copy;
>>   iGeom_copyEnt(geom, cyl, &copy, &err);
>>   CHECK( "ERROR: could not copy the entity" );
>>
>>   //check to see if the tag is accessible
>>   int bytes;
>>   iGeom_getTagSizeBytes(geom, test_tag, &bytes, &err);
>>   CHECK( "ERROR: could not get the tag size" );
>>
>>   if (bytes != sizeof(int)) return false;
>>
>>   iGeom_getIntData(geom, cyl, test_tag, &check_value, &err);
>>   CHECK( "ERROR: could not get the tag data" );
>>
>>   if (check_value != value) return false;
>>
>>   //cleanup
>>   iGeom_destroyTag(geom, test_tag, 1, &err);
>>   CHECK( "ERROR: could not destroy tag" );
>>
>>   iGeom_deleteEnt(geom, cyl, &err);
>>   CHECK( "ERROR: could not delete entity" );
>>
>>   iGeom_deleteEnt(geom, copy, &err);
>>   CHECK( "ERROR: could not delete entity" );
>>
>>   return true;
>> }
>>
>> -- 
>> Patrick C. Shriwise
>> Research Assistant
>> University of Wisconsin - Madison
>> Engineering Research Building - Rm. 428
>> 1500 Engineering Drive
>> Madison, WI 53706
>> (608) 446-8173
>
> -- 
> Patrick C. Shriwise
> Research Assistant
> University of Wisconsin - Madison
> Engineering Research Building - Rm. 428
> 1500 Engineering Drive
> Madison, WI 53706
> (608) 446-8173

-- 
Patrick C. Shriwise
Research Assistant
University of Wisconsin - Madison
Engineering Research Building - Rm. 428
1500 Engineering Drive
Madison, WI 53706
(608) 446-8173

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