def face_vt_to_flags(face_t, face_vt):
    """
    returns the flags for a complete new face
    input:
        face_t: string tag to name face
        face_vt: list of vertex tags
    output
        flags: flags is a dict where the
                key  face tag + vert tag
                value  (face tag, vert tag, tag of next CCW vert in the face)
    """
    flags = {}
    for v1_t, v2_t in zip(face_vt, face_vt[1:] + face_vt[:1]):
        flags[face_t + v1_t] = [face_t, v1_t, v2_t]

    return flags