|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.
The G4OpBoundaryProcess is a 'forced' process. It is called at every step whether that step ends at a boundary or not. However, its DoIt checks the step status. If it's not 'fGeomBoundary' it returns. It also returns, does nothing, if 'fGeomBoundary' but medium#1 and medium#2 are identical. The problem, which is a BUG at present, is that the G4OpBoundaryProcess status is not initialized to 'undefined' at the beginning of the DoIt and hence, when medium#1 == medium#2, remains what it was in a previous invocation that actually triggered essential code in the DoIt.
Therefore, for the moment please check the 'fGeomBoundary' status AND the media before trusting the G4OpBoundaryProcess status.
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