TRACK private

class interface TRACK

exported features {NONE}
   
   prepare_fit
	 -- IFPREP
	 -- Prepares for track fit. Clumps measurements into superlayers.
	 -- Handles track fit options (vertex in fit, seed fit, etc).
	 -- Set logical option flags.
   
   loop_until_chi_squared_minimized
	 -- IFITTER
	 -- Fit to track hits, optionally including vertex, and seed or
	 -- road parameters. Special bremsstrahlung and coulomb
	 -- scattering treatments are included.
	 -- Iterative tracking algorithm with least squared correction to
	 -- helix parameters expressed at the closest transverse approach
	 -- to the input vertex via the first derivatives of the track
	 -- residual(s) at each hit.
   
   export_fitted_trajectory
	 -- IFSTORE
	 -- Store results of succesful track fit.
   
   road: ROAD   
   magnetic_field: MAGNETIC_FIELD   
   clusters: ARRAY [INDET_CLUSTER]