Hi, rooters. I’m working on LITRANI (Gentit’s) trying to combine two shapes (tsbriks) as one flourescent piece. But in doing so I reached two problems.
First, It seems to be that litrani put revetment between the shapes composing the piece: I compair the composition of two tsbriks (model A) and one tsbrik alone (model B). Model A and B had the same dimensions, the same light detectors and were exposed to the same beam of pions. However, the efficency (saw in dostats) was different (1.2% vs 0.8%) due to absortion in revetment 
How do I tell litrani to consider model A as just one piece?
Second, When I take off the revetment in the construction of the tsbriks (to obtain equivalence between the two models), detectors doesn’t work. Am I doing something wrong or it we have to define a revetment?
dimensions of tsbriks are ( 10, 10, 5 )
dimensions of detectors - fibers ( 0.1, 0.1, 0.1 ) -> 4 fibers on one side of the plastic
example of definition of one of the tsbriks
pieza1 = new TSBRIK( “PIEZA1”, “PIEZA1”, “PLASTICO”, “TEFLON”, hdx, hdy, hdz );
contact between pieces:
union = new TContact( “UNION”, “UNION”, “PIEZA1”, “PIEZA2”, identical, “none” );
example of detector:
fibra1 = new TSBRIK( “FIB1”, “FIB1”, “AIRE”, “TOTABS”, hdxf, hdyf, hdzf );
fibra1->fSuppl->SetSurfDet( “DETFIB1”, “DETFIB1”, CaraDetectora );
example of contact between fiber and plastic:
UnFibra1 = new TContact( “UNFIB1” , “UNFIB1”, “FIB1”, “PIEZA1”, contained, “none” );
Thanks for the attention,
To understand your problem, I must have a look at your example. I will do it as soon as I can. Notice the following point about revetment in Litrani: when a face of a shape is declared as having a revetment, but part of this face (or the whole face) is in contact with an other shape, Litrani assumes that there is no revetment for the part in contact.