class TreeSearch::MWDC: public THaTrackingDetector

 Constructor

 Destructor. Delete objects & subdetectors and unregister variables

 Clear event-by-event data, including those of wire planes and projections

 Decode all planes and fill hitpatterns per projection

 Linear minimization routine to fit a physical straight line track through
 the hits registered in the different projection planes.

 This is a much streamlined version of ROOT's TLinearFitter that solves
 the normal equations with weights, (At W A) a = (At W) y, using Cholesky
 decomposition, TDecompChol. The model used is
   y_i = P_i * T_i
       = ( x + z_i * mx, y + z_i * my) * ( cos(a_i), sin(a_i) )
 where
   y_i is the measured coordinate in the i-th wire plane at z_i
   P_i is the physical track intersection point with the z_i plane
   T_i is the axis unit vector of the i-th plane
   a_i is the angle of the coordinate axis of the i-th plane w.r.t. x
   x,mx,y,my are the track parameters to be fitted, origin x,y and
       slopes mx,my.

 "roads" contains a set of Roads that successfully combine in 3-d, one
 Road* per projection. Each road, in turn, contains a set of (y_i,z_i)
 coordinates, at most one per wire plane of the projection type, that
 give the best 2D track fit within the road.

 "coef" are the fitted track parameters, x, x'(=mx), y, y'(=my).
 The reference system is the z=0 plane (usually the first chamber).

 "chi2" is the chi2 of the fit (not normalized).

 "coef_covar" is the covariance matrix of the fit results. Since it is
 expensive to calculate, it is only filled if the argument is supplied.

 The return value is the number of degrees of freedom of the fit, i.e.
 npoints-4 > 0, or negative if too few points or matrix inversion error

 For the given wire plane, find the hit nearest to the given track
 and register it in the plane's fit coordinates array.
 The given roads are the ones generating the given track.
 This routine is used for efficiency and alignment studies and testing.

 Make new track with given parameters. Used by CoarseTrack to generate
 all MWDC tracks

 Save road combination with good matchvalue

 Match roads from different projections that intersect in the front
 and back plane of the detector

 Test results of 3D track fit (in fit_par) against hard cuts from
 database

 Find tracks from the hitpatterns, using the coarse hit drift times
 uncorrected for track slope, timing offset, fringe field effects etc.

 Second-level tracking, applying fine corrections.

 - Correct the hit drift distances using timing, track slope,
   track momentum, magnet fringe field, etc., as applicable.
 - Re-collect hits of roads and re-fit roads
 - Re-combine track projections in 3D and re-fit 3D track

 Initialize global variables

 Initialize MWDC. Calls standard Init(), then initializes subdetectors.

 Read MWDC database

 Set debug level of this detector, including all wire planes (subdetectors)
 and projections

 Enable event display support. Can only be called before initialization.

 Return the index corresponding to the given plane name.
 The comparison is not case-sensitive.

 Update detector map module 'mod' with the model number from the cratemap

 Update detector map module 'mod' with the resolution from the cratemap

 Return number of channels for detector map module 'mod' from cratemap