iFit/sw_gensymcoupling

 generates all equivalent couplings, using space group symmetry

 [genCp ugenCp] = SW_GENSYMCOUPLING(obj, coupling, sym, {tol})

 Input:

 obj       sw class object.
 coupling  Vector, contains the original coupling. Dimensions are [5 1].
           Elements are [dlx dly dlz atom1 atom2 idx dist].
 sym       Cell, that contains the rotation and translation operators of
           the space group: {rotOp, trOp}.
 tol       Tolerance, optional. Default value is 1e-5.

 Output:

 genCp     Matrix, each column contains a coupling, the meaning of each
           row are the same as the input coupling variable.
 ugenCp    Logical variable, true if the coupling is unique in the list of
           generated couplings.