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Forum: Geometry
Re: None G4CutTubs why some part cannot tracking? (T.D.Trong)
Re: None Re: G4CutTubs why some part cannot tracking? (Tatiana Nikitina)
Date: 05 Oct, 2014
From: T.D.Trong <T.D.Trong>

Hi Tatiana,

Thank you for your help.
I checked for the possible overlaps and it said OK. -> No overlap returned from beginning of program, but during running I got some warning like:
-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : GeomNav1002
      issued by : G4Navigator::ComputeStep()
Track stuck or not moving.
          Track stuck, not moving for 10 steps
          in volume -MS_cell2- at point (-1.34297,-37.8446,442.334)
          direction: (-0.949084,0.156194,0.273573).
          Potential geometry or navigation problem !
          Trying pushing it of 1e-07 mm ...Potential overlap in geometry!

*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------
Checking overlaps for volume MS_chamber ... OK!
-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : GeomNav0003
      issued by : G4Navigator::ComputeStep()
Stuck Track: potential geometry or navigation problem.
        Track stuck, not moving for 25 steps
        in volume -MS_chamber- at point (-1.34297,-37.8446,442.334)
        direction: (-0.949084,0.156194,0.273573).
*** Event Must Be Aborted ***
-------- EEEE -------- G4Exception-END --------- EEEE -------

About sharing surface, I am not clearly understand this. But in my opinion, G4IntersectionSolid will pickup a solid, which overlap of two input solid. I checked carefully one by one and it shown correctly. more detail, please take a look in the attach file. Best regards,

Tran Dinh Trong

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/10/05/22.30-16030-view.pdf

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1 None: Re: G4CutTubs why some part cannot tracking?   (Tatiana Nikitina - 06 Oct, 2014)
(_ None: Re: G4CutTubs why some part cannot tracking?   (T.D.Trong - 06 Oct, 2014)
(_ None: Re: G4CutTubs why some part cannot tracking?   (Tatiana Nikitina - 07 Oct, 2014)
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