Determining a particular uv set for a given map in a material?

[ewerybody]

Materials do not have UV-sets you know?! ;]

But polygons that have a certain material assigned may have multiple UV-sets.
You are asking for an API-way, huh?

Via mel you can query -allUVSets with the polyUVSet command.
You'd have to switch on the corresponding uvSet with
polyUVSet -currentUVSet -uvSet "uvSetName" |pCube1|pCubeShape1;
for instance, to be able to query the positions of uvs
polyEditUV -query;
// Result: 0 0 1 0 0 1 1 1 0 2 1 2 0 3 1 3 0 4 1 4 2 0 2 1 -1 0 -1 1 //

[hellknows2008]

Thx for your reply first.

Yes, I do know uv sets belong to polygons. The problem is that I want to programmatically (either MEL or C/C++, tho C/C++ is prefered) determine that which uv set is linked to a particular attribute(e.g. color, transparency, more but don't know the exact names) in a material. If I know the uv set name in question then its fine. But its usually not known beforehand and I don't want to constraint users to rename the uv set as e.g. "Lightmap_UVSet".

Apparently when there are more than 1 uv sets then in UV linking (UV centric) editor, after linking e.g. transparency to "uvSet1", there will be a node called "uvChooser1" added in the hypershade editor, but I can't find anything useful in that node. One more note, the "uvChooser1" only happens when the uv set of the linking is not the current uv set

[GiantG]

You have to trace down the Connection of the Material till you find the uvChooser Node.
This one reveals the Name of the UVSet.

But remember that you will only find non-default UVSets.
The default UVSet doesn't have an uvChooser Node.
To find this you have so store all non-standard UVSets and everything that is not inside one of the non-default uvset belongs to the default UVSet.

Example:

listConnections -t "shadingEngine" pSphereShape1;
listConnections phong2;
listConnections ramp2;
listConnections place2dTexture2;
getAttr uvChooser1.uvSets[0];

If i find some time i will write it for you...

cheerz..

[hellknows2008]

Thx. Its very useful

However, I discovered one weird thing. If I have the following uv sets in a polygon node:

map1
uvSet
uvSet1
uvSet2

Then, if I link "uvSet" to transparency attribute then I can successfully retrieve the name by using "getAttr uvChooser1.uvSets[0]". However, if I link using "uvSet1" then, "getAttr uvChooser1.uvSets[1]" is what I want. Then if I link using "uvSet2" then, "getAttr uvChooser1.uvSets[0]" is what I am after. I opened the connection editor and it revealed what I said above

Any idea??

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