|Message: Re: SegV in PreUserTrackingAction due to missing Touchable.||Not Logged In (login)|
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Thanks for your thorough evaluation of the SegV problem. It seems to me that you found a real bug, for 'optical photons' are the only particles in G4 where the velocity depends on the material. The obvious solutions, change of program flow or removing velocity from the Trajectory, clearly need to be discussed among the developers. The code also needs to check the pointer and maybe set a default (speed of light) if the pointer doesn't exist.
Best regards, Peter Gumplinger
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