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Question Dump of Polyhedra 

Forum: Geometry
Date: 10 Sep, 2009
From: Johannes Hoppenau <Johannes Hoppenau>

Hi,

I am a bit confused about the the dump of an simple polyhedra.
Why are the tangent distances to the surfaces and the R values of the corners
the same? I expected the the tangent distance to surface to be the distance
from the centre of the polyhedra to the centre of the surface. Thus this
distance should be shorter than the R values of the corresponding corner. 

    *** Dump for solid - WCBarrelAnnulus ***
    ===================================================
 Solid type: G4Polyhedra
 Parameters: 
    starting phi angle : 1.2 degrees 
    ending phi angle   : 361.2 degrees 
    number of Z planes: 2
              Z values: 
              Z plane 0: -17285.5
              Z plane 1: 17285.5
              Tangent distances to inner surface (Rmin): 
              Z plane 0: 16723.7
              Z plane 1: 16723.7
              Tangent distances to outer surface (Rmax): 
              Z plane 0: 17083.7
              Z plane 1: 17083.7
    number of RZ points: 4
              RZ values (corners): 
                         16723.7, 17285.5
                         16723.7, -17285.5
                         17083.7, -17285.5
                         17083.7, 17285.5

Many Thanks
Johannes

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