[MOAB-dev] question about OBB

[Tim Tautges]

Not sure about the deleting part, but you're right about the local creating part.  Jason might be able to answer on 
deletion...

- tim

On 05/02/2011 10:46 AM, Iulian Grindeanu wrote:
> Hello,
> Actually, I would like to have more control over the OBB tree creation/deletion or even update.
> When I am modifying geometry (or meshes), instead of deleting the whole tree, and creating it again, I would like to
> update "locally". Is that possible?
>
> So in the following scenario:
> I have a model with 200 surfaces. I would like to split one surface in 2, generate one more surface (and at least one edge)
> Can I modify the tree locally?
>
> It might be a too difficult job, and not worth the effort.
>
> There are methods to build a "tree" from a range of entities, and join after that with an existing tree,
> but I do not see any method to "delete" a tree (or a branch?)
>
> Or am I missing something?
>
> Thanks,
> Iulian
>
> ----- Original Message -----
>> Hmm, maybe that third argument should be true so the OBB gets deleted
>> with the GTT? Or, there should be an argument to
>> the GTT constructor that passes through to that argument in OBBTree?
>>
>> - tim
>>
>> On 04/29/2011 05:19 PM, Iulian Grindeanu wrote:
>>> Hello,
>>> I have a question about OBB;
>>> When we use it in geom topo tool, the default constructor is called
>>> for obb:
>>> GeomTopoTool::GeomTopoTool(Interface *impl, bool find_geoments) :
>>>     mdbImpl(impl), sense2Tag(0), senseNEntsTag(0),
>>>     senseNSensesTag(0),
>>>     geomTag(0), gidTag(0), obbTree(impl), contiguous(true),
>>>     oneVolRootSet(0)
>>>
>>> This means that the obb sets are not deleted, even after
>>> GeomTopoTool is deleted. The third argument is by default false,
>>> (OrientedBoxTreeTool( Interface* i,
>>>                              const char* tag_name = 0,
>>>                              bool destroy_created_trees = false ))
>>>
>>>
>>> (if we would use obbTree(impl, 0, true), the OBB sets will be
>>> deleted when GeomTopoTool is deleted)
>>>
>>> Or is there another way to "clean" after the OBB?
>>>
>>> I am not quite sure about the lifecycle of OBB / and its sets
>>>
>>>
>>> Thanks,
>>> Iulian
>>>
>>
>> --
>> ================================================================
>> "You will keep in perfect peace him whose mind is
>> steadfast, because he trusts in you." Isaiah 26:3
>>
>> Tim Tautges Argonne National Laboratory
>> (tautges at mcs.anl.gov) (telecommuting from UW-Madison)
>> phone: (608) 263-8485 1500 Engineering Dr.
>> fax: (608) 263-4499 Madison, WI 53706
>

-- 
================================================================
"You will keep in perfect peace him whose mind is
   steadfast, because he trusts in you."               Isaiah 26:3

              Tim Tautges            Argonne National Laboratory
          (tautges at mcs.anl.gov)      (telecommuting from UW-Madison)
          phone: (608) 263-8485      1500 Engineering Dr.
            fax: (608) 263-4499      Madison, WI 53706