BrLocalTrackTPC

class BrLocalTrackTPC : public BrLocalTrackModule

    private:

       void CopyTrahit(BrLocalTrack* OldTr, BrLocalTrack* NewTr, Int_t Imod)
       void FillHitCMBSelectorr(BrLocalTrack* loctra, BrDataTable* HitCMBSel)
       void FitLocalTPCTrack(BrLocalTrack* loctraa, Float_t* sol, Float_t* covar, Float_t* chisq, Int_t* ifail)
       void GetClusTPCMod(Int_t irow, Int_t stat, BrDataTable* TPCCluster, BrDataTable* ClusTPCMod)
       void GetDigTPCMod(Int_t irow, Int_t padno, Int_t time, BrDataTable* DigitizedTPC, BrDataTable* DigTPCMod)
      Int_t GetFreeCluster()
      Int_t GetMaxPixel(BrTPCCluster* cluster_ID, Int_t* ixm, Int_t* iym)
       void InitCluster()
       void ScanMultiHitClusters(BrDataTable* DigitizedTPC, BrDataTable* TPCCluster)
       void TPCClusterToHitCMB(BrDataTable* TPCCluster)
       void TPCPadCluster(BrEventNode* InputTable)
       void TPCPadFindHit(BrDataTable* HitCMBMod, Int_t irow, Float_t* proj, Float_t dx, Float_t dy, Int_t* ncand, Int_t maxcandd, Int_t* iclist)
      Int_t TPCPadRecon(BrDataTable* HitCMBMod, Int_t istart, Int_t ilast, Int_t idir, Int_t maxmiss, Float_t dx, Float_t dy)
      Int_t TPCPadTrack(Int_t idet, Int_t maxmiss, Float_t dx, Float_t dy)

    public:

           BrLocalTrackTPC BrLocalTrackTPC(Char_t* Name, Char_t* Title)
           BrLocalTrackTPC BrLocalTrackTPC()
           BrLocalTrackTPC BrLocalTrackTPC(BrLocalTrackTPC&)
                      void ~BrLocalTrackTPC()
                   TClass* Class()
              virtual void Event(BrEventNode* InputTable, BrEventNode* OutputTable)
      BrDetectorParamsTPC* GetDetectorParamsTPC()
         BrDetectorVolume* GetDetectorVolume()
           virtual TClass* IsA()
                      void ListDetectorParameters()
                      void SetDetectorParamsTPC(BrDetectorParamsTPC* par)
                      void SetDetectorParamsTPC(BrDetectorParamsTPC& par)
                      void SetDetectorVolume(BrDetectorVolume* vol)
              virtual void ShowMembers(TMemberInspector& insp, char* parent)
              virtual void Streamer(TBuffer& b)

  Data Members
    private:

      BrDetectorParamsTPC* fParams_p       
         BrDetectorVolume* fVolume_p       
                     TH1F* h_TPCpsig       
                     TH1F* h_TPCtsig       
                     TH2F* h_TPCpsig_tsig  
         BrLocalTrackTPC:: cluster[200]    
         BrLocalTrackTPC:: pixels[196][160]  

Class Description

																				
 The BrLocalTrackTPC class provides an interface to the BRAHMS TPC			
 Local Tracking																
																				

 Default Constructor.

 Is there a problem with the fact the the fParams_p can point to different kinds
 of datastructures i.e. potential memory leak. probably yes since fParams_p is
 defined as BrDetectorParams nor BrDetectorParamsTPC.
 By second thought it is probably ok. As long as all parameters are defined/set
 Using the SetDetectorParamsTPC / DC /BB etc..

 Set the TPC parameters with the values of the external parameters
 referenced by pointer
 Note that no owner ship is transferred. A copy is made.

 Set the TPC parameters with the values of the external parameters.
 Note that no owner ship is transferred. A copy is made.
 There is no real need for the copy code here. Both Name and Title
 will be copied (it seems)

 List the current value of the digitization parameters on
 standard out.

The routine that is executed event by event.
First local tables are cleared, then the different subroutines are executed
The data path is:
TPCPadCluster:
Get DigitizedTPC from the Input Table
DigitizedTPC table has a list of BrDigTPC
Generate TPCCluster intermediate table with entries of BrTPCClusters
From that information, generate list of CombinedHits

TPCPadTrack
Take CombinedHits and generate LocalTracks in TPCPadRecon
Use LocalTracks to generate VirtualTracks

FillLocalTracks:
Use VirtualTracks generated to minimize on chisq and get list of detector tracks

This routine calls TPCPadRecon in a loop over the number of pads a track is
allowed to miss before throwing away
Then virtual tracks are filled.
Then loop over the number of local tracks previously found, generating
the chisqr

Local tables needed:
CombinedHits

FitLocalTPCTrack takes the input Local Track, extracts the combined hits that
make up this track and does a fit to get a chisqr
Input arguments:
BrLocalTrack *loctraa	: the local track to be fit
Output arguments:
Float_t *sol          : output parameters from the fit
Float_t *covar        : covar
Input tables:
None
Output tables:
None

Routine to generate trackhits.
First loop over combined hits selected on istart
Generate local tracks
Loop over local tracks
Input parameters
BrDataTable *HitCMBMod
Int_t        istart
Int_t        ilast
Int_t        idir
Int_t        maxmiss     : Max number of pads that can be missed before throwing away
Float_t      dx
Float_t      dy

This routine selects CombinedHits on irow
Loop over selected CombinedHits and take the ones in the list
where (projx - dx < hitcmb_x < projx + dx) and (projy - dy < hitcmb_y < projy + dy)

Input Arguments:
BrDataTable *HitCMBMod : Data table to hold CombinedHits selected on padrow
Int_t             irow : the padrow of the TPC
Float_t          *proj :
Float_t           dx   : x-spacing to be accepted as a hit
Float_t           dy   : y-spacing to be accepted as a hit
Int_t            iclist: list of hitcmb's found
Int_t             ncand: number of hitcmb's found

Input Table
DigitizedTPC        : from calling routine
Intermediate Table
TPCCluster          : has entries of BrTPCCluster to be used in ScanMultiHitClusters

Generate BrCombinedHit elements from information in TPCCluster

Generate a list of BrDigTPC elements out of DigTPC table selected on irow, padno and time

Get a list of BrTPCCluster elements out of TPCCluster table selected on irow and stat

Loop over TrackHits and select BrTrackHit entries Whose TrID matches OldTr
If Imod of that BrTrackHit also matches the input parameter:
 1. Get the combined hit associated with that BrTrackHit
 2. Set its status to appropriate value
 3. Make a new BrTrackHit and add to TrackHits
 4. Add this BrTrackHit to NewTr

Arguments:
BrLocalTrack *OldTr :
BrLocalTrack *NewTr :
Int_t          Imod :

Input table
TrackHits (modified in this routine)

Inline Functions

        BrDetectorParamsTPC* GetDetectorParamsTPC()
           BrDetectorVolume* GetDetectorVolume()
                        void SetDetectorVolume(BrDetectorVolume* vol)
                     TClass* Class()
                     TClass* IsA()
                        void ShowMembers(TMemberInspector& insp, char* parent)
                        void Streamer(TBuffer& b)
             BrLocalTrackTPC BrLocalTrackTPC(BrLocalTrackTPC&)