Interaction between positions of Ki, Kf vectors and Nomad parameters: add ss parameter
We need to add ss (scattering sense) along with Ki, Kf, Q. The parameter is in Nomad, but needs to become "virtual" in vEXP i.e. we must have calc_ss in VEXPController.
Two problems to solve:
- Draw correctly the Ki and Kf vectors according to the Nomad parameters.
- Deduce ss from the vEXP parameters (Ki, Kf, sample, etc.). Then the script exported to Nomad must change the sense.