|Message: Re: How to obtain the number of photon reflections?||Not Logged In (login)|
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Instead of checking materials between pre- and post-stepPoint, I would suggest to check the step status. If the step status is "fGeomBoundary", that particular step was limited by the transportation process at the volume boundary. G4StepStatus st = theStep->GetPostStepPoint()->GetStepStatus(); To check whether a particular process was involved to the step or not (I'm not talking about a process which limits a step), I would suggest you to visit our tips page. http://geant4.slac.stanford.edu/Tips/index.html Tip #6 in Event & Track section would help you. Thus, if 1) the step was limited by the transportation process, and 2) optical process was involved to the step, then follow the Peter's suggestion to get the status of the optical process.
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