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Re: mvd classes [message #4590 is a reply to message #4587] Fri, 29 June 2007 11:06 Go to previous messageGo to previous message
Ralf Kliemt is currently offline  Ralf Kliemt
Messages: 507
Registered: May 2007
Location: GSI, Darmstadt
first-grade participant

From: 141.30.85*
Quote:


In the Hybrid hitProducer when you ask for GetlocalHitPoint transformation , how will be the coordinates system of
the silicon sensor defined? Is the same as the global frame?


GetLocalHitPoints(point, posInL, posOutL);
Takes the MvdPoint point (global frame) and converts the in and out points to the local sensor frame (written to posInL and posOutL).


Quote:


in The CalcGlobalPoint(..) method,
what is thedifference between the col and colB?
are they both the variable for the clumn number?


The CalcGlobalPoint Methyod is a MC-Clustering. It will go outside the Digitization. As far as I know this should not be called in the Exec Of the HybridHitProducer. The col is the column number, which becomes a charge-weighted mean for this cluster. The colB is the non-weighted mean.

Quote:


why do you do col += 0.5, what is the meaning of this 0.5?


I think Tobias made this, because the column numbers are integers of the pixel borders. The output value is just shifted into the middle of the pixel.

I hope this helps.

Regards, Ralf.

[Updated on: Fri, 29 June 2007 11:07]

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