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Hi, In looking over the clustering code, I noticed that in HPSEcalCluster a position property calculation is automatically performed, using some code that was copied from the tensor property calculator in LCSim. So this calculation used to be done automatically for most of the clustering algorithms, as they used either HPSEcalEcluster or HPSEcalClusterIC which extends that class. For the “IC” clusters, this is further supplemented by PID based recalculation of the position and energy within HPSEcalClusterIC. I am wondering, does this really make sense to apply the tensor property calculation to all the different types of clusters? Is this supposed to be providing some kind of reasonable default? What was the idea here? For instance, should this property calculation really be applied to CTP and GTP clusters, which are more of a concept based on the DAQ/trigger rather than physics? Should the position of the cluster there be only based on the seed hit? In the new clustering “framework” it is possible to easily apply these corrections via ClusterDriver to whatever cluster collection you are processing, as I have extracted them into a ClusterPropertyCalculator. I am basically wondering when this does and doesn’t make sense to do by default, and what people doing analysis are expecting here. 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