[Opensim-dev] Texture UUID in XML File

Wed Aug 5 20:08:04 UTC 2009

Steve,

It sounds as if you probably are planning to reload a saved object after the
fact of modification. In that event, you wont need to modify the texture in
the asset database, nor muck about with databases and their tables.

Sounds like a pretty interesting project :) but as Teravus says, you will
likely have to use libOMV (http://openmetaverse.org) to decode the texture
entry in the xml file.

You will need someone who is a fairly proficient coder to work with this
library - all the details such a person will need can be found at the site
referenced above.

If there is any way in which I might further assist you, please feel free to
give me a shout.

Cheers!

James/Hiro Protagonist

On Wed, Aug 5, 2009 at 3:00 PM, Melanie <melanie at t-data.com> wrote:

> The asset database has nothing to do with what you want. You can
> decode and recode the texture entry quite easily, and just replacing
> the UUID is trivial.
>
> Melanie
>
> Stephen Carroll wrote:
> > Thanks for the information Melanie and James.
> > So you believe the better way to do this is provide a web for to directly
> > modify the MySQL database that holds the assets information? Admittedly,
> I
> > know little about MySQL and so I knew I could work with the xml files.
> > Perhaps some more information about my project is in order. I am working
> > with a team of college students and faculty at my university to create a
> > website that will allow building a virtual area in a virtual world. For
> > example, a prebuilt object would exist in an avatars inventory on
> OpenSim.
> > This object would be a prebuilt building, such as a museum, classroom,
> > conferenceroom, etc. We call this object a template. The template would
> also
> > have locations on the wall reserved for pictures. So the user would
> choose
> > through the website that they want to use the museum template, with
> specific
> > already in OpenSim images for specific image locations. Then the user
> would
> > click a "build" button that rezzes the customized template.
> > To accomplish this, each template has already been built in OpenSim and
> then
> > saved into its xml format (using the save xml2 command). When the user
> > selects what template and what textures they want to use through the
> website
> > interface, a program would go through the xml file and replace the
> default
> > template's texture information in that file with the texture information
> > related to what was chosen on the website. This creates a new xml file
> that
> > contains all of the information necessary to rez a customized building.
> > As I already have rezzing the template in OpenSim through the website and
> > saving the chosen pictures through the website, all I thought was needed
> was
> > replacing the texture information in the template xml file with the
> texture
> > information chosen from the website. That is why I was wondering where
> the
> > texture information is stored in the xml file. But it sounds like you are
> > suggesting I deal directly with the asset database instead of changing
> the
> > xml file? Are all linked prims that make up an object stored neatly in
> the
> > database and is the texture UUID also stored neatly in the database with
> the
> > linked prims that make up the object? To me it sounds like directly
> > modifying the database is more work than necessary but what do the rest
> of
> > you think?
> > Thanks,
> > Steve
> > On Wed, Aug 5, 2009 at 3:01 PM, Melanie <melanie at t-data.com> wrote:
> >
> >> That string is a base64 representation of the binary texture entry,
> >> which contains texture, color, offset, rotation, scale, etc.
> >>
> >> Melanie
> >>
> >> Stephen Carroll wrote:
> >> > Hello,
> >> > My name is Steve and I am working on a web interface that will allow
> >> > changing textures on prims in OpenSim. I have got a web interface to
> >> process
> >> > the save xml2 and load xml2 commands thinking I could modify the xml
> file
> >> > itself to set the texture UUID to what is chosen on the website. I am
> >> > confident that I can write a program to modify the xml file, but I can
> >> not
> >> > see where the texture UUID is stored in the xml file. Looking through
> the
> >> > xml file generated on a test object after issuing the command "save
> >> xml2", I
> >> > see a line that looks like:
> >> >
> >>
> <TextureEntry>i1/sZY2NncXNqI/fJxbjYQAAAAAAAAAAgD8AAACAPwAAAAAAAAAAAAAAAAAAAA==</TextureEntry>
> >> > It looks to me that the above line tells OpenSim what texture to apply
> to
> >> > the object when the object is loaded with the command "load xml2". But
> I
> >> do
> >> > not see a connection between this string and the UUID of the texture.
> The
> >> > texture's UUID is not in the xml file though. So where is the texture
> >> > information stored in the xml file? Does the <TextureEntry> line have
> >> > anything to do with identifying what texture to apply to the object?
> Is
> >> > there a reference manual that says what parts of the xml file are for
> >> what
> >> > in OpenSim?
> >> > Thanks,
> >> > Steve
> >> >
> >> >
> >> >
> >> >
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