[G12] versions of mc tools

[mpaolone at jlab.org]

Craig and everyone,

  I'm looking at this the other other way.  We are still in the analysis
stage, and if the current version of a1c is giving us a better
reconstruction (occasional bugs aside, it should never be worse) than
the pass1 a1c, then we should instead consider cooking another pass. 
Has a1c changed significantly since pass1?  Have we touched the detector
libraries since then?  If there have been no significant changes that
affect your analysis channel, then it should be fine to compare
current-a1c cooked MC calculations with pass1-a1c reconstructed data.

-Michael



>   g12ers,
>      Last night I forgot to ask about which version of a1c one should
> use when processing MC. I remember hearing that we should use the pass1
> branch of the SVN repository so we're using the same code to cook real
> data and MC data. However, do we want all MC-related tools to be built
> from the pass1 branch, or just a1c? It seems strange to me to generate
> detector responses with a GSIM linked against one version of detector
> libraries and then reconstruct them with a1c linked against a different
> version of the detector libraries. Perhaps all that matters is that the
> detector libraries themselves are from pass1, since a1c mostly just
> organizes input and output and sets up calls to those libraries. I have
> no idea what GSIM might use the detector libraries for--I just know I
> have to link them to get it to compile.
>
> At present, ~clasg12/local/scripts/sample_gsim_desktop.sh uses tools
> from the clas6 STABLE 32-bit build, which is not what was used for g12
> pass1.
>
> Any thoughts?
>
> --cb
>
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