I have defined a vector of angle signs. This vector can get only 1 and -1 values for positive and negative angles.
One way to express this, would be to define the variable as integer and then constraint it between -1 and +1 and finally exclude the 0 value with a different constraint. But this seems a total overkill.
Could I define somehow a set and then say something of the sort: Anglesigns PlusMinus ?