[Opensim-dev] Best approach for Vanilla Opensim region module to create and manipulate scene objects.

[Justin Clark-Casey]

On 31/01/11 14:33, Gould, Simon wrote:
> Hi All,
>
> I am new to Opensim development and was hoping I could “pick your brains” about how to best go about creating a region
> module, using the Vanilla Opensim c# API, that will create and manipulate objects within a scene.

API is rather strong at this point, but the internals have been stable for quite some time.  However, this isn't 
guaranteed to be the case in the future.

>
> I have taken a look at the documentation and also seen the Python Modrex visualisation of a Software project from source
> control. Unfortunately I am not very familiar with the Opensim API or Python and we want to avoid complicating the
> project by adding in extensions.
>
> What we have is a simple region module based on the Hello world example (I couldn’t get the updated mechanism to work).
>
> Where I am struggling is with the loading and copying of the objects. What we want is to have a set of persistent
> defined objects stored somewhere, then to create a number of these in the scene e.g. ObjA, ObjB and ObjC are stored
> somewhere, we create 3 objAs and 2 objBs and connect them together using ObjCs.

The technique I usually use is to place ObjA, ObjB and ObjC in another prim's inventory.  Then I rez them by retrieving 
them by name, with code like the following.

             SceneObjectPart part;
             Scene scene;
             Vector3 rezPos;

             TaskInventoryItem item = part.Inventory.GetInventoryItems(objAName)[0];

             SceneObjectGroup so = part.Inventory.GetRezReadySceneObject(item);

             scene.AddNewSceneObject(so, true, rezPos, so.Rotation, Vector3.Zero);

If you need to link then programatically that's another issue.  There is some test code in 
OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkTests.cs that should prove useful.

-- 
Justin Clark-Casey (justincc)
http://justincc.org/blog
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