class HMetaMatch: public TObject

  HMetaMatch

  Keep indexes of hits for one track, matching qualities, and
  indexes of track objects (HSplineTrack, HKickTrackB,...).

  Indexis of hits:
    trkCandInd                      -  index of HTrkCand object
    showerHitInd                    -  index of HShowerHitTof object
    tofHitInd                       -  index of HTofHit or HTofCluster object
    aRichIndTable[RICH_TAB_SIZE]    -  arr.of indexes of HRichHit objects
    aRichIPUIndTable[RICH_TAB_SIZE] -  arr.of indexes of HRichHitIPU objects

    Arrais aRichIndTable and aRichIPUIndTable are sorted by matching quality
    and can keep up to 3 ring indexes.

 Quality MDC SHOWER matching:
   Xs,Ys - shower hit position in coordinate system of shower module
   dXs,dYs - hit position errors (== HShowerHit::getSigmaX(), getSigmaY())
   Xm,Ym - mdc segment cross point with shower module in coordinate system
           of corresponding shower module
   showerSigmaXOffset & showerSigmaYOffset - from HMetaMatchPar cont.
   showerSigmaXMdc & showerSigmaYMdc - from HMetaMatchPar cont.
   qualityShower =
     sqrt[((Xs - Xm - showerSigmaXOffset)/sqrt(dXs^2 + showerSigmaXMdc^2))^2 +
          ((Ys - Ym - showerSigmaYOffset)/sqrt(dYs^2 + showerSigmaYMdc^2))^2]

 Tof:
   Xt,Yt - toh hit (or tof cluster position in coordinate system of tof module
   Xm,Ym - mdc segment cross point with tof module in coordinate system
           of corresponding tof module
   tofSigmaXOffset, tofSigmaYOffset - from HMetaMatchPar cont.
   tofSigmaX, tofSigmaY - from HMetaMatchPar cont.
   qualityTof = sqrt[ ((Xt - Xm - tofSigmaXOffset)/tofSigmaX)^2 +
                      ((Yt - Ym - tofSigmaYOffset)/tofSigmaY)^2 ]