sPHENIX tracking discussion

[Christof Roland <christof.roland AT cern.ch>]

Hi Hugo, 

I will soon commit the switch to cluster version v4.
For most reco modules it is rather easy to add a switch for the cluster 
version number. 

For the TrackEvaluation this is not so easy. For the new cluster version we 
need to change the content 
of the cluster struct to have access to the new cluster quality variables. So 
in principle we would need to 
augment the TrackEvaluationContainer version number. 
This would make it very complicated or require a lot of code duplication to 
keep this alive for cluster v3 and v4.

Question do you care here about backward compatibility? Do you want to keep 
acceess to clusterv3 alive?

Coding wise it would be the easiest to add a few variables to 
TrackEvaluationv1, i.e. break backward comaptibility, 
and move to clusterv4. Not good style, hence I am asking. 

Please let me know what you think/need.

Cheers

   Christof