Message: Re: Volumes of G4Tubs smaller? & Boolean operation between to 'ring's not working? Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Re: Volumes of G4Tubs smaller? & Boolean operation between to 'ring's not working? 

Keywords: Volumes of G4Tubs, Boolean operations between G4Tubs w/ finite inner radii
Forum: Geometry
Re: Question Volumes of G4Tubs smaller? & Boolean operation between to 'ring's not working? (Kazuyoshi Furutaka)
Re: Question Re: Volumes of G4Tubs smaller? & Boolean operation between to 'ring's not working?
Date: 13 Apr, 2005
From: John Allison <John Allison>

1) As you will have understood from the other messages on this thread, this is a visualisation problem only - geometrical tracking is not affected. For visualisation it is necessary to construct a polyhedron, which is fraught with well-known numerical problems - that is what the error message is about.

2) The problem you are seeing most likely comes from an attempt to subtract a volume that shares a surface with the subtractee. This is also mentioned in the other messages on this thread. Make sure your subtracting tubes are longer than the subtractees. If there is still a problem, try a small (physicallly insignificant) change of radius.

3) Why not try the union of 3 hollow tubes (G4Tubs'es with an inner radius)?

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

 Add Message Add Message
to: "Re: Volumes of G4Tubs smaller? & Boolean operation between to 'ring's not working?"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]