Stick to closest uv

gistfile1.py

from maya import OpenMaya
from pymel.core import *
import math

class UvCoord(object):
    def __init__(self, u, v):
        self.u = u
        self.v = v

    def dist(self, uv):
        du = self.u - uv.u
        dv = self.v - uv.v
        return math.sqrt(du * du + dv * dv)


def mfnmesh_from_objname(name, extend_to_shape=False):
    if not objExists(name):
        raise MayaNodeError, name
    slist = OpenMaya.MSelectionList()
    slist.add(name)
    dagpath = OpenMaya.MDagPath()
    slist.getDagPath(0, dagpath)
    if extend_to_shape:
        dagpath.extendToShape()
    return OpenMaya.MFnMesh(dagpath), dagpath

def get_uv(meshfn):
    us = OpenMaya.MFloatArray()
    vs = OpenMaya.MFloatArray()
    meshfn.getUVs(us, vs)
    uvs = []
    for i in range(us.length()):
        uvs.append(UvCoord(us[i], vs[i]))
    return uvs

def set_uv(meshfn, uvs):
    us = OpenMaya.MFloatArray()
    vs = OpenMaya.MFloatArray()
    for uv in uvs:
        us.append(uv.u)
        vs.append(uv.v)
    meshfn.setUVs(us, vs)

def transfer_uv(src, dst):
    srcmesh_fn, srcmesh = mfnmesh_from_objname(src)
    dstmesh_fn, dstmesh = mfnmesh_from_objname(dst)
    src_uvs = get_uv(srcmesh_fn)
    dst_uvs = get_uv(dstmesh_fn)
    
    uvs = []
    for duv in dst_uvs:
        closest_dist = 1.0
        closest_id = -1
        for i, suv in enumerate(src_uvs):
            dist = duv.dist(suv)
            if dist < closest_dist:
                closest_dist = dist
                closest_id = i
        uvs.append(src_uvs[closest_id])
    print len(uvs)
    set_uv(dstmesh_fn, uvs)


# 総当りでuv同士の距離を全部測って一番近いポイントにくっつける
transfer_uv('objA', 'objB')