class HShowerPadDigitizer: public HShowerDigitizer

 creates ShowerGeantWire(input), ShowerRawMatr(output) and ShowerTrack
 categories and adds them to current event
 creates an iterator for ShowerTrack category

 It should have been done

    if (((HLinearCategory*)getTrackCat())->IsSortable())

 Used to suppress the secondaries created in the
 SHOWER itself.
        0 = realistic (secondaries included)
        1 primary particle is stored
        2 the first track number entering the SHOWER in SAME SECTOR is stored
        3 the first track number entering the TOFINO in SAME SECTOR is stored
          or the primary track if no TOFINO was found
        4 (default) the first track number entering the TOFINO in SAME SECTOR is stored
          or the first track in SHOWER if no TOFINO was found

 Used to suppress the secondaries created in the
 SHOWER itself.
        0 = realistic (secondaries included)
        1 primary particle is stored
        2 the first track number entering the SHOWER in SAME SECTOR is stored
        3 the first track number entering the RPC in SAME SECTOR is stored
          or the primary track if no RPC was found
        4 (default) the first track number entering the RPC in SAME SECTOR is stored
          or the first track in SHOWER if no RPC was found

charge density matrix is calculated

 gain charge in simulation

 check efficiency
 model good for post converters

charge density matrix is delimited to the sensitive area which covers fired pads

 moves charge density matrix to the place where is placed induced charge on the sense wire
 *corYld = pPad->getYld() - fDy;

 this function calculates charge induced on pad analytically
 it is useful only for square or rectangular pads