[Opensim-dev] IRegisterInterface for extending scene entities

[Adams, Robert]

I think adding a module allowing scripts to attach dynamic variables to SOPs is the right level of functionality. Just adding a key/value store is way too low a level.

For instance, the JSONStore module (http://opensimulator.org/wiki/JsonStore_Module) creates a dynamic variable storage to share between scripts. Since it's made for sharing, a script can request events when values are updated. The module adds, as one piece, functionality for extension and communication between scripts.

Does this attribute store enable such? Would a script want to know when one of the key/value pairs changed? Is polling suitable? Does the usage case just need static variable addition?

As to the practical, implementation angle, yes, you are correct that adding an OSD store on a scene object is simpler. This is an open source project, after all, so this is just my opinion.

-- ra

-----Original Message-----
From: opensim-dev-bounces at lists.berlios.de [mailto:opensim-dev-bounces at lists.berlios.de] On Behalf Of Oren Hurvitz
Sent: Friday, January 04, 2013 11:22 AM
To: opensim-dev at lists.berlios.de
Subject: Re: [Opensim-dev] IRegisterInterface for extending scene entities

The typing problem is already solved since the dynamic attributes are implemented using OSD.

Your proposal is much more complicated than the currently proposed attributes, and I don't want to suppress a good solution in favor of a perfect solution that might never be implemented (I assume you're too busy with BulletSim to do this...) Furthermore, it would prevent a very exciting
use-case: the ability to use dynamic attributes from a script, using OSSL.
(Well, unless you add a module for that specific purpose, but in that case you just added a layer of indirection around the key-value store.)

Oren



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