[Opensim-users] osSetPrimitiveParams question

[simon burke]

On 06/05/2014 02:40 PM, Marcus Llewellyn wrote:
>
> If I'm reading what you want to accomplish correctly, my understanding 
> is that this is not possible. A mesh's UUID is for an object. It is 
> akin to trying to swap one prim for a completely different one.
>
> As a historical note, when mesh was still in beta over at LL (and in 
> Opensim's original implementation), meshes were originally something 
> applied to a prim, much like a texture or sculpt map. This was later 
> changed, and meshes become first class objects in their own right.
>


ok so had mesh'es remained "applied to a prim" then i could have changed 
the mesh UUID that is applied after rezzing.

BUT

if meshes are now "first class objects" i:e equivalent to a prim, then I 
must rez a mesh, i can't convert a prim to a mesh.

I think that makes sense.



So question is , is it possible to rez a mesh from an LSL script if i 
have the original mesh UUID available ?

I know i can copy the mesh object into the prim then llRezObject from 
there, but the copy is a PITA, can i rez directly without the copy into 
the prim ?, i:e is there an equivalent to

osRezObject(key UUID,  vector pos, ...) ?


Cheers

S

> On Jun 5, 2014 3:17 PM, "simon burke" <simon at duanedibley.com 
> <mailto:simon at duanedibley.com>> wrote:
>
>     Folks
>        not sure if this is a feature bug or misunderstanding (on my part).
>     I recently posted a thread at osgrid and was advised to ask here
>
>     osgrid  :
>     forums.osgrid.org/viewtopic.php?f=5&t=5191&p=24373#p24373
>     <http://forums.osgrid.org/viewtopic.php?f=5&t=5191&p=24373#p24373>
>
>     Background is below
>
>     I am using llSetPrimitiveParams to set params on an existing
>     (created) object to PRIM_TYPE=9, FLAG=7 (sculpt) and MAP=mesh
>     UUID, PRIM_TYPE_SCULPT = 5 (mesh).
>
>     i:e settings to "7::9b71b6a9-98d8-42c4-930a-807247619d33::5"
>
>     If i read back PRIM_TYPE right after i get
>     "7::9b71b6a9-98d8-42c4-930a-807247619d33::1"
>
>     so it set the UUID correctly but left the type as 1
>     (PRIM_TYPE_CYLINDER) instead of type 5 (MESH).
>
>     checking LL docs for LlSetPrimitiveParams say this/"With this
>     subtype, PRIM_TYPE_SCULPT's map parameter is read-only, when read
>     NULL_KEY is returned. In other words this can only be used to
>     determine that a prim is of the mesh subtype."/. It seems it was
>     enabled/allowed initially then disabled later on.
>
>     SO it seems like i have run into the UUID swap problem
>
>     http://wiki.secondlife.com/wiki/Why_UUI ... ing_is_Bad
>     <http://wiki.secondlife.com/wiki/Why_UUID_Flipping_is_Bad>
>
>     http://blog.nalates.net/2011/06/27/seco ... e-week-26/
>     <http://blog.nalates.net/2011/06/27/second-life-mesh-meeting-update-week-26/>
>
>     oddly it seems like i can set the UUID, but not set the type to
>     MESH to use it .
>
>
>     So in summary , while llSetPrimitiveParams i assume must remain
>     "compatible" with SL, is there any option, setting or other magic
>     i can use  that would enable osSetPrimitiveParams to support UUID
>     swapping for Meshes. Specifically I am rezzing a regular "Box",
>     then trying to one time swap the type, subtype and UUID to an
>     existing mesh UUID. I am not trying to swap a mesh to a different
>     mesh, or do this more than once per rez.
>
>     There may be bigger technical details beneath this that have been
>     hinted at in discussions but i am unaware of.
>
>     So question is can osSetPRimitiveParams support mesh type and UUID
>     "setting" ?
>
>     cheers
>
>     Simon
>
>
>
>
>
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