[Halld-offline] DVertex from MC

[Paul Mattione]

Done.  Now run with:

-PDEFTAG:DVertex=THROWN

on the command line. 

 - Paul

On Feb 8, 2012, at 4:00 PM, David Lawrence wrote:

> 
> Hi Paul (and everyone else),
> 
>  Just a comment: For several of the tracking factories, we have made 
> tagged versions using the tag "THROWN" to indicate that it uses truth 
> information only available in MC data. See for example, 
> DTrackWireBased_factory_THROWN. Using these objects is then selected by 
> setting the DEFTAG:DTrackWireBased parameter to "THROWN". This has the 
> small advantage of keeping the code in DTrackWireBased_factory_THROWN.cc 
> a little cleaner, but the small disadvantage of having more source 
> files. Not that I'm trying to make more work for you, but I'm thinking 
> it might be nice to use the same convention where possible. Let me know 
> what you think (after you've finished cursing my name).
> 
> Regards,
> -David
> 
> On 2/8/12 3:46 PM, Paul Mattione wrote:
>> I've added (and checked into svn) a new parameter to the libraries/PID/DVertex factory called "PID:VERTEX_FROM_MC."  Setting this parameter to 1 from the command line will cause the factory to generate only one DVertex, set it to the first thrown MC vertex (regardless of how many vertices were thrown within a given event), set the vertex time to zero, and assign all of the DChargedTracks to it.  This parameter is set to 0 by default (disabling this functionality).
>> 
>>  - Paul
>> 
>> 
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