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None Re: how to use G4BREPSolid 

Forum: Geometry
Re: None how to use G4BREPSolid (Zhiyi Liu)
Date: 26 Jan, 2010
From: John Apostolakis <John Apostolakis>

Dear Zhiyi,

Unfortunately it is quite hard to use G4BREPSolid directly - I would  
not recommend it.

I would suggest to examine whether an existing solid (or a boolean  
operation on a set of existing solids) could be used to yield the  
solid you need or an approximation to it which is adequate.

What is certain is that neither this solid nor any other in Geant4 is  
able to infer information - for example to determine by itself how to  
create some surfaces.

If you described what you want to do, maybe we can offer further advice.

Best regards,
John Apostolakis

On Jan 26, 2010, at 9:32 AM, Zhiyi Liu wrote:

> One of my puzzles is that I do NOT know all surface information,  
> just part of them, for example, I just know the top
> and bottom surface of the solid, how can I construct such a solid  
> without feeding the class with all planes on its surface? Since it  
> is very tricky to get all information of surfaces of the solid, I  
> _would_ let Geant4 to make up some missing surfaces for me so that  
> the solid is a close solid. [Is this] possible?

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1 None: Re: how to use G4BREPSolid   (Zhiyi Liu - 26 Jan, 2010)
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