New class for track validation conditions

[u/mrichter/AliRoot.git] / ITS / UPGRADE / AliITSUTrackCond.h

diff --git a/ITS/UPGRADE/AliITSUTrackCond.h b/ITS/UPGRADE/AliITSUTrackCond.h
new file mode 100644 (file)
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+++ b/ITS/UPGRADE/AliITSUTrackCond.h
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+#ifndef ALIITSUTRACKCOND_H
+#define ALIITSUTRACKCOND_H
+
+#include <TObject.h>
+#include <TArrayS.h>
+
+//------------------------------------------------------------------------------
+//
+// This class defines a set of hit patterns (conditions) to consider the track reconstructable
+// Each condidition (few consequitive elements from fConditions array) is set of bit patterns, 
+// with each element of condition defining a group of layers which must be present in the tracks.
+// For instance, if we require the track to have contributions from
+// {lr0 or lr1 or lr2} AND {lr2 or lr 3 or lr 4} AND {lr5 or lr6} then the condition should
+// be {BIT(0)|BIT(1)|BIT(2), BIT(2)|BIT(3)|BIT(4), BIT(5)|BIT(6)}.
+// Additionally, each condition may request min number of hits to be present
+//
+// Each AliITSUTrackCond should correspond to single track finding pass and may contain multiple
+// conditions. To consider the track reconstructable it is enough to satisfy 1 condition
+//
+//------------------------------------------------------------------------------
+
+
+class AliITSUTrackCond : public TObject
+{
+ public:
+  enum {kCondStart,kNGroups,kMinClus,kNAuxSz};
+
+  AliITSUTrackCond(Int_t nLayers=0);
+  AliITSUTrackCond(const AliITSUTrackCond& src);
+  AliITSUTrackCond &operator=(const AliITSUTrackCond& src);
+
+  ~AliITSUTrackCond() {}
+  
+  void        SetNLayers(Int_t nl)                 {fNLayers = nl;}
+  void        SetID(Int_t id)                      {SetUniqueID(id);}
+  void        AddNewCondition(Int_t minClusters);
+  void        AddGroupPattern(UShort_t patt);
+
+  Int_t       GetID()                                  const {return GetUniqueID();}
+  Int_t       GetNConditions()                         const {return fNConditions;}
+  UShort_t    GetGroup(Int_t condID,Int_t grID)        const {return fConditions[fAuxData[condID*kNAuxSz+kCondStart]+grID];}
+  Bool_t      CheckPattern(Int_t ncl,UShort_t patt)    const;
+  //
+  virtual void  Print(Option_t* option = "")           const;
+
+ protected:
+  //
+  Short_t     fNLayers;                  // total number of layers
+  Short_t     fNConditions;              // number of conditions defined
+  TArrayS     fConditions;               //[fNConditions] set of conditions
+  TArrayS     fAuxData;                  // condition beginning (1st group), n groups, min clus
+  //
+  ClassDef(AliITSUTrackCond,1)           // set of requirements on track hits pattern
+};
+
+
+
+#endif