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I believe GTP is a recreation of what the trigger does, which just uses the seed position, and so does not calculate a position. Multiple hits in one channel in clustering should be automatically taken care of by time coincidence requirements (if stricter than the pulse integration range). Looks like that's already being done in GTP and something to do in Recon. -nathan On Jan 20, 2015, at 5:55 PM, "McCormick, Jeremy I." <[log in to unmask]> wrote: > Hi, > > Wondering about a couple things in the ECAL clustering…. > > 1) For the non recon clustering (e.g. CTP, GTP, etc.) what should the position of the cluster be set to in the algorithm? Holly has made a position calculation in ReconClusterer but I do not see this being done in any of the other Clusterer classes. By default, the previously used tensor calculator would be used to set the position when getPosition is called on the Cluster, as this is the default in BaseCluster, but I’m not sure this makes any sense. Should it instead be the position of the seed hit e.g. for GTP and CTP algorithms? > > 2) Do all of the algorithms handle multiple hits in the same channel gracefully or at least do something sane and not crash? I know this was just fixed in the ReconClusterer so that it will not crash, but it seems to pick one of the hits arbitrarily, as far as I can tell. Depending on the DAQ settings, multiple hits can occur in the same channel, so should this be handled in some uniform way in all of the algorithms? I guess time cuts could be used here to filter out hits past some maximum time but multiple hits could still be present after this. > > Thanks. > > —Jeremy > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the HPS-SOFTWARE list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1