Data duplication in the ERTelescopeTrack

[kozlovmy]

The parameters https://github.com/FLNR-JINR/er/blob/dev/telescope/data/ERTelescopeTrack.h#L28

   ** @param fXStationVertex - Track vertex on telescope station, which produced X coordinate;
   ** @param fYStationVertex - Track vertex on telescope station, which produced Y coordinate;
   ** @param fXStationLocalVertex - Track vertex in station CS on telescope station, which produced X coordinate;
   ** @param fYStationLocalVertex - Track vertex in station CS on telescope station, which produced Y coordinate;
   ** @param fXChannel - Channel number in telescope station, which produced X coordinate;
   ** @param fYChannel - Channel number in telescope station, which produced Y coordinate;
   ** @param fXEdep - Edep in telescope station, which produced X coordinate;
   ** @param fYEdep - Edep in telescope station, which produced Y coordinate;

Parameters like fXStationVertex and fYStationVertex, fXChannel and fYChannel are seemed to be duplication of the same data in the heavyweight TVector3 objects. We can significantly reduce the size of the output tree by a union them to a single structure. Or do they have special meaning?

Vitaliy:

fXStationVertex and fYStationVertex are TVector objects, yes. These are geometrical vertexes of track. But fXChannel and fYChannel are integers. These are channel numbers. What exactly do you suggest to union?