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25/*! @brief Cet interprete doit etre utilise en sequentiel (avant decoupage) si les sommets opposes d'un bord periodique ne sont pas parfaitement alignes.
26 *
27 * (cas de certains maillages tetra si le mailleur est trop contraint par la CAO).
28 * Il tente de deplacer les sommets pour les aligner.
29 *
30 * Cet interprete permet de corriger les frontieres periodiques pour etre conformes aux besoins de TRUST:
31 * - reordonner les faces du bord periodique pour que la face i+n/2 soit en face de la face i,
32 * et toutes les faces [0 .. n/2-1] du meme cote et [n/2 .. n-1] de l'autre cote
33 * - deplacer les sommets des faces periodiques si besoin (si la CAO est fausse)