learnPython/EyeRig at master · griffinanimator/learnPython · GitHub

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from maya import cmds, OpenMaya

center =  'center'
vtx = cmds.ls(sl=1, fl=1)

for v in vtx:
    cmds.select(cl=1)
    jnt =  cmds.joint()
    pos =  cmds.xform(v, q=1, ws=1, t=1)
    cmds.xform(jnt, ws=1, t=pos)
    posC =  cmds.xform(center, q=1, ws=1, t=1)
    cmds.select(cl=1)
    jntC =  cmds.joint()
    cmds.xform(jntC, ws=1, t=posC)
    cmds.parent(jnt, jntC)
    cmds.joint(jntC, e=1, oj="xyz", secondaryAxisOrient="yup", ch=1)


sel = cmds.ls(sl=True)

for s in sel:
    loc =  cmds.spaceLocator()[0]
    pos = cmds.xform(s, q=1, ws=1, t=1)
    cmds.xform(loc, ws=1, t=1)
    par = cmds.listRelatives(s, p=1)[0]