| TGeoMixture SetIndex function [message #11729] |
Mon, 02 May 2011 15:37  |
Maria Patsyuk
Messages: 58
Registered: April 2010
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continuous participant |
From: *gsi.de
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Hello,
there is a function called "SetIndex()" in TGeoMixture class.
What does this index mean?
For example if I define a number of media for the detector geometry (an example for Fused Sil medium follows), what should these indices for each of my medium mean?
Should they be unique? Where are they later used?
// Mixture: FusedSil
nel = 2;
density = 2.200000;
TGeoMixture* FusedSil = new TGeoMixture("FusedSil", nel,density);
aa = 28.090000; z = 14.000000; w = 0.467475; // SI
FusedSil->DefineElement(0,aa,z,w);
aa = 15.999400; z = 8.000000; w = 0.532525; // O
FusedSil->DefineElement(1,aa,z,w);
FusedSil->SetIndex(0);
// Medium: FusedSil
numed = 1; // medium number
par[0] = 1.000000; // isvol
par[1] = 1.000000; // ifield
par[2] = 20.000000; // fieldm
par[3] = -1.000000; // tmaxfd
par[4] = -1.000000; // stemax
par[5] = -1.000000; // deemax
par[6] = 0.001000; // epsil
par[7] = -1.000000; // stmin
TGeoMedium *FusedSil_m = new TGeoMedium("FusedSil", numed,FusedSil, par);
Thank you
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| Re: TGeoMixture SetIndex function [message #11740 is a reply to message #11729] |
Wed, 04 May 2011 15:36  |
Mohammad Al-Turany
Messages: 518
Registered: April 2004
Location: GSI, Germany
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first-grade participant |
From: *gsi.de
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Hi,
You do not need to set this index, at the end of geometry constructiona SetIndexAll() method will be called (internally, you do not need to call it), this method take care that each material or mixture has a unique index.
regards
Mohammad
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