[IMP-dev] Annoyance with current restraint design

[Daniel Russel <>]

I have some restraints which I want to have be semi-dynamic, meaning,  
I want to be able to reset the list of particles which they act on.  
This doesn't work so cleanly with restraints taking lists of  
ParticleIndexes as then you need one version of set_particles to be  
called from the constructor (where the Restraint::model_ is not set)  
and another version to be called by outsiders after the model pointer  
has been set (or pass the model pointer to both and ignore the stored  
pointer).

This seems like a reason for writing restraints which take Particles  
rather than ParticleIndexes. It may also be worth dropping the  
Restraint::model_ pointer entirely and just using the pointer stored  
in particles. So

DistanceRestraint::DistanceRestraint(Particle*, Particle*, ScoreFunc*)
ExclusionVolumeRestraint(Particles, ScoreFuncParams)

Any thoughts?