[Halld-offline] hdgeant

[David Lawrence]

Hi Pawel,

    I'm CC-ing the HallD-Offline mailing list since this may be of 
general interest.

    Yes, you can use janaroot with auto_activate. In order to get 
anything useful, you will either need to run mcsmear on your 
hdgeant-produced hddm file, or tell JANA to use the TRUTH hits in 
reconstruction (which will give unrealistically good results). To do the 
former, do this:

1.) edit control.in and run hdgeant to produce hdgeant.hddm file

    > hdgeant


2.) run mcsmear on the hdgeant.hddm file to get file with smeared values 
called hdgeant_smeared.hddm. (Passing the -n command line switch 
prevents generation of random hits.)

    > mcsmear -n hdgeant.hddm


3.) run hd_ana with the janaroot plugin and appropriate auto_activate 
switch to get your ROOT file. For example:

    > hd_ana -PPLUGINS=janaroot,janadot --auto_activate=DFCALPhoton 
hdgeant_smeared.hddm

Note that here, I used the alternate way of specifying plugins that 
makes it a little more compact when specifying more than one plugin. I 
added the janadot plugin just for fun so I could make a picture of the 
call graph used. I've attached it here for the current example:




Regards,
-David

pawel at jlab.org wrote:
>  Hi David,
>
>   
>> This modification was done by Brad and Ryan and checked in some time
>> ago.  I think you should have seen this when you moved the simulation
>> of FCAL response from the FCAL library into mcsmear.  I'm cc'ing both
>> of them -- maybe they can comment.
>>     
>
>  In Matt's message above he mentions moving of the FCAl response
>  into mcsmear. I wanted to ask you about that earlier but got distracted.
>  How do I retrieve the FCAL information from an hddm file?
>  I can't use the auto_activate mechanism in conjunction with janaroot plugin, can I?
>
>  Thanks for any help,
>  Pawel
>
>
>
>   

-- 

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 David Lawrence Ph.D.
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