[ESPResSo-devel] Particle Masses definition

[Evyatar Arad]

Good week all,

I’ve noticed that in friction_thermo_langevin there are two different masses 
used in the langevin equation while calculating force:
      p->f.f[j] = langevin_pref1*p->m.v[j]*PMASS(*p) + 
langevin_pref2*gaussian_random()*massf;

What is the difference between PMASS(*p) and massf?
both are available even though MASS (mass per particle) is off.

Thanks,
Evyatar.