[sldev] Regarding VWR-2427, expanding obj. inventory within agent inventroy

[Leonel Morgado]

Just an idea: what if the object is rezzed as a HUD but outside the user's
view, and then taken back into the inventory? Wouldn't this simplify
matters?

Inté,

Leonel


-----Original Message-----
From: sldev-bounces at lists.secondlife.com
[mailto:sldev-bounces at lists.secondlife.com] On Behalf Of kelly at lindenlab.com
Sent: segunda-feira, 19 de Janeiro de 2009 04:34
To: Matt McGill
Cc: sldev at lists.secondlife.com
Subject: Re: [sldev] Regarding VWR-2427, expanding obj. inventory within
agent inventroy

> Hi Kelly,
>
> Thanks for such a prompt and detailed response!
>
> I suspected as much after reviewing the available messages. I had been
> holding out hope that one could retrieve/de-serialize the asset on the
> client, make the requisite changes to the object's contents, and then
> serialize/store the updated asset file. However, am I correct that the
> asset server is in fact not accessible by clients directly? It seems
> that this must be the case, but strangely I've had a hard time confirming
> it via google.
>

That is correct.  The viewer does not have any direct access to the asset
server, or the database.  All such access goes through the simulator.


> So the real problem is that the simulator must act as the go-between
> for the viewer and the asset server, and the simulator code currently
> only supports manipulating live object inventories. Thus, any
> viewer-only attempt at supporting a feature like the one described in
> VWR-2427 would inevitably be an ugly (and most likely unreliable)
> hack.
>
> Well, I shall have to find something else to serve as my hobby project.
> Thanks again!
>
> P. Spoonhammer
>
> On Jan 18, 2009, at 7:19 PM, kelly at lindenlab.com wrote:
>
>> Unfortunately the design of SL makes this kind of feature rather
>> difficult, and especially more difficult as a viewer-only project.
>>
>> Agent inventory is conceptually a set of links or shortcuts to assets
>> (objects, sounds, textures etc).  When you manipulate agent
>> inventory data
>> is updated in a database, but the actual assets don't change.
>>
>> Assets on the other hand are *static files* that live on a (fancy,
>> high
>> performance) http server.  This includes 'objects' which live in
>> LLSD xml
>> format, including references to any inventory contents on them (and
>> script
>> state and lots more).
>>
>> When you rez an item the asset is fetched from the asset servers,
>> deserialized and instantiated in world.  Objects in world are *not*
>> assets, they are objects.  When you manipulate an object (or its
>> inventory) in world, it is the in memory version of that object
>> that is
>> changing on the simulator.  When you take the object (or when it gets
>> de-rezed back to inventory for any reason) then the object is
>> serialized
>> and saved as a new asset.
>>
>> With the way the system currently is, modifying an object (whether in
>> inventory or not) requires:
>> * An http fetch of the asset linked to by the inventory item
>> * Deserialization of that asset into memory
>> * Viewing and/or modification of the object
>> * Serialization of the newly modified object
>> * An http PUT to write a new asset
>> * Updating the inventory item references.
>>
>> That is, I think, a lot of work.  And a whole lot more, if it is
>> possible
>> at all, to get similar behavior with a viewer only project.
>>
>>  - Kelly
>>
>>
>>
>>> Hello all,
>>>
>>> I'm looking for a fun hobby project, and improving the SL client
>>> would help this humble Java programer stay current on his C++ skills.
>>>
>>> I've been wishing for something along the lines of the feature
>>> requested in VWR-2427 (https://jira.secondlife.com/browse/VWR-2427)
>>> for quite some time. Specifically, I was hoping to enable the editing
>>> of an object's inventory without rezzing that object.
>>>
>>> Unfortunately, a cursory perusal of message_template.msg seems to
>>> indicate that the only messages that allow manipulation of an
>>> object's inventory are viewer->sim messages that require a rezzed
>>> object. Is my little project dead on arrival? Are there no messages
>>> that can be used to manipulate inventory based on an agent and
>>> item Id?
>>>
>>> Thanks,
>>> -P. Spoonhammer
>>> _______________________________________________
>>> Policies and (un)subscribe information available here:
>>> http://wiki.secondlife.com/wiki/SLDev
>>> Please read the policies before posting to keep unmoderated posting
>>> privileges
>>>
>>
>>
>
>


_______________________________________________
Policies and (un)subscribe information available here:
http://wiki.secondlife.com/wiki/SLDev
Please read the policies before posting to keep unmoderated posting
privileges
No virus found in this incoming message.
Checked by AVG - http://www.avg.com 
Version: 8.0.176 / Virus Database: 270.10.7/1895 - Release Date: 17-01-2009
17:50