getAttr always returning 0?

[noamgat]

I wrote the following function to get the index of the closest vertex to a certain UV coordinate :

def getClosestVertexIndex(targetObject, targetUv):
    vertexCount = cmds.polyEvaluate(targetObject, vertex=True)
    minSqrDistance=2
    minVertexIndex=-1
    for i in xrange(vertexCount):
        vertexAttr = "{0}.vtx[{1}]".format(targetObject,i)
        uvAttr = cmds.polyListComponentConversion(vertexAttr, toUV=True)
        print vertexAttr,uvAttr
        uvs = cmds.getAttr(uvAttr)
        for uv in uvs:
            print uv,targetUv
            sqrDistance = sum([(a-b)**2 for a,b in zip(targetUv,uv)])
            if sqrDistance < minSqrDistance:
                minSqrDistance = sqrDistance
                minVertexIndex = i
    return minVertexIndex

The problem is, that even though the attribute names for the getAttr call are legal (for example, pCube1.map[0] etc), I get (0,0) in all of the UVs. I tried manually calling cmds.getAttr('pCube1.vtx[0]') and also got a (0,0,0) vector.

What am I doing wrong?

(To make it simple, in Maya 2011 I create a cube (called pCube1) and do cmds.getAttr('pCube1.vtx[2]') , and get (0,0,0) as the result, no matter what the index of the vertex is)

[jan-ace]

Hey Noam gat,

Jup having the same problem here. Funny I never ran into that problem before. Must be that maya does not consider this an normal attribute that you can query.

You can try tis instead.
cmds.polyEditUV ( 'yourObjectName.map[0]', query = True)

Let me know if this works.

[noamgat]

Works perfectly! Thanks!