[Frost] initeloss

[Eugene Pasyuk]

The whole idea of having InitEloss to read geometry from the calibration 
database was to avoid any confusion and make sure that geometry is 
exactly the same as was used for cooking and tracking.
And here we are, all confused.
By the way, this number 2.0 for ST offset which apparently everybody is 
using, what is it? I don't remember run period with such ST offset.
For g8b the ST offset was -24.

-Eugene

Ken Livingston wrote, On 10/17/10 12:51:
> Hi Mike, Eugene and all,
>
> The answer to Mike's question is "yes it should be -4.0".
>
> To elaborate a little -
> The set up and use of the eloss rootbeer wrapper are described at.
> http://clasweb.jlab.org/rungroups/g9/wiki/index.php/Rootbeer%
> 2C_including_eloss_and_ExpTable
>
> There is actually a comment in sample_code/elossTest.C
>
> ...
> //targ_X, targ_y, targ_z, st_offset
> initELoss(0.0,0.0,0.0,2.0);
> ...
>
> As you can see, it needs the x,y,z target coords and start counter
> offset. This is instead of it having too look these numbers up in caldb.
>
> The reason it "crept in" is that the eloss package in not independent of
> the clas software packages and was never meant to be. Conversely, the
> rootbeer scheme is as independent as possible of the clas packages and
> all other stuff (except, obviously, ROOT). The only thing rootbeer needs
> to build and run is the clasbanks.ddl file which describes the BANKS for
> the data being analysed. On this rare occasion that means a number has
> to be gotten manually from the database and hard-wired in to your
> analysis code.
>
> (and Eugene, it didn't "creep in" to eloss, which I have never tampered
> with. It "crept in" to the C/C++ wrapper for eloss - a rootbeer extra
> which uses the standard checked out version of the eloss fortran code.)
>
> Sorry if that has caused confusion.
>
>
> Cheers
> Ken
>
>
> On Sat, 2010-10-16 at 08:51 -0400, Eugene Pasyuk wrote:
>> I have no idea what this 'initEloss" is doing and how it crept in!
>> It is not the original "InitEloss" that I wrote. This is different
>> function, note spelling difference. Maybe rootbeer experts should
>> explain us what is it. InitEloss form the original eloss package has
>> only one parameter: run_number.
>>
>> -Eugene
>>
>>
>> Michael Dugger wrote, On 10/16/10 00:36:
>>>
>>> Eugene,
>>>
>>> Thanks for the info.
>>>
>>> My COBRA stuff is getting the wrong info for eloss :(
>>>
>>> I'm so used to seeing the g8b numbers nothing looked wrong to me.
>>>
>>> In my rootbeer code I have
>>> initELoss(0.0,0.0,0.0,2.0)
>>>
>>> Should this be
>>> initELoss(0.0,0.0,0.0,-4.0) ?
>>>
>>> -Michael
>>>
>>> On Fri, 15 Oct 2010, Eugene Pasyuk wrote:
>>>
>>>> No, these numbers are incorrect. Those are g8b numbers.
>>>> For g9a/b ST-offset should be -4 and target position at 0.
>>>> This is what in caldb, run index: calib_user.RunIndexg9b.
>>>>
>>>> -Eugene
>>>>
>>>>
>>>> Michael Dugger wrote, On 10/15/10 18:24:
>>>>>
>>>>> Eugene,
>>>>>
>>>>> My call to initeloss gives this:
>>>>> InitEloss-I-: ST-offset is set to -24.059999
>>>>> InitEloss-I-: Target position is set to 0.000000, 0.000000, -20.000000
>>>>>
>>>>> Is this correct?
>>>>>
>>>>> -Michael
>>>>
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