Hi, do we have an example of how to check if a particular track passes through a given sensor. More specifically, I have a track and I have the SiSensor object, do we have a working function that can tell me if my track went through this volume? /Pelle ######################################################################## 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