13 /**************************************************************************/
15 /**************************************************************************/
17 // Basic structures for Reve. Design criteria:
19 // * provide basic cross-referencing functionality;
21 // * small memory/disk footprint (floats / count on compression in
24 // * simple usage from tree selections;
26 // * placement in TClonesArray (composites are TObject derived);
28 // * minimal member-naming (impossible to make everybody happy).
30 void DisablePODTObjectStreamers();
32 /**************************************************************************/
34 /**************************************************************************/
36 // Minimal Float_t copy of TVector3.
37 // Used to represent points and momenta.
44 Vector() : x(0), y(0), z(0) {}
45 Vector(Float_t _x, Float_t _y, Float_t _z) : x(_x), y(_y), z(_z) {}
47 Float_t* c_vec() { return &x; }
48 void Set(Float_t* v) { x=v[0]; y=v[1]; z=v[2]; }
49 void Set(Double_t* v) { x=v[0]; y=v[1]; z=v[2]; }
50 void Set(Float_t _x, Float_t _y, Float_t _z) { x=_x; y=_y; z=_z; }
51 void Set(Double_t _x, Double_t _y, Double_t _z) { x=_x; y=_y; z=_z; }
52 void Set(const TVector3& v) { x=v.x(); y=v.y(); z=v.z(); }
55 Float_t Theta() const;
56 Float_t CosTheta() const;
59 Float_t Mag() const { return TMath::Sqrt(x*x+y*y+z*z);}
60 Float_t Mag2() const { return x*x+y*y+z*z;}
62 Float_t Perp() const { return TMath::Sqrt(x*x+y*y);}
63 Float_t Perp2() const { return x*x+y*y;}
64 Float_t R() const { return Perp(); }
66 // need operator +,-,Dot
71 inline Float_t Vector::Phi() const
72 { return x == 0.0 && y == 0.0 ? 0.0 : TMath::ATan2(y,x); }
74 inline Float_t Vector::Theta() const
75 { return x == 0.0 && y == 0.0 && z == 0.0 ? 0.0 : TMath::ATan2(Perp(),z); }
77 inline Float_t Vector::CosTheta() const
78 { Float_t ptot = Mag(); return ptot == 0.0 ? 1.0 : z/ptot; }
80 /**************************************************************************/
82 /**************************************************************************/
87 enum Type_e { Reference, Daughter, Decay };
92 PathMark(Type_e t=Reference) : type(t) {}
94 ClassDef(PathMark, 1);
97 /**************************************************************************/
99 /**************************************************************************/
101 class MCTrack : public TParticle // ?? Copy stuff over ??
104 Int_t label; // Label of the track
105 Int_t eva_label; // Label of primary particle
107 Bool_t decayed; // True if decayed during tracking.
108 // ?? Perhaps end-of-tracking point/momentum would be better.
109 Float_t t_decay; // Decay time
110 Vector V_decay; // Decay vertex
111 Vector P_decay; // Decay momentum
113 MCTrack() { decayed = false; }
115 MCTrack& operator=(const TParticle& p)
116 { *((TParticle*)this) = p; return *this; }
118 void ResetPdgCode() { fPdgCode = 0; }
120 ClassDef(MCTrack, 1);
124 /**************************************************************************/
126 /**************************************************************************/
130 class MCTrackRef : public TObject
142 ClassDef(MCTrackRef, 1)
146 /**************************************************************************/
148 /**************************************************************************/
150 // Representation of a hit.
152 // Members det_id (and subdet_id) serve for cross-referencing into
153 // geometry. Hits should be stored in det_id (+some label ordering) in
154 // order to maximize branch compression.
157 class Hit : public TObject
160 UShort_t det_id; // Custom detector id
161 UShort_t subdet_id; // Custom sub-detector id
162 Int_t label; // Label of particle that produced the hit
166 // ?? Float_t charge. Probably specific.
174 /**************************************************************************/
176 /**************************************************************************/
178 // Base class for reconstructed clusters
180 // ?? Should Hit and cluster have common base? No.
182 class Cluster : public TObject
185 UShort_t det_id; // Custom detector id
186 UShort_t subdet_id; // Custom sub-detector id
187 Int_t label[3]; // Labels of particles that contributed hits
188 // ?? Should include reconstructed track using it? Rather not, separate.
191 // Vector W; // Cluster widths
192 // ?? Coord system? Special variables Wz, Wy?
196 ClassDef(Cluster, 1);
200 /**************************************************************************/
202 /**************************************************************************/
204 class RecTrack : public TObject
207 Int_t label; // Label of the track
208 Int_t status; // Status as exported from reconstruction
210 Vector V; // Start vertex from reconstruction
211 Vector P; // Reconstructed momentum at start vertex
218 Float_t Pt() { return P.Perp(); }
220 ClassDef(RecTrack, 1);
223 // Another class with specified points/clusters
226 /**************************************************************************/
228 /**************************************************************************/
230 class RecKink : public RecTrack
233 Int_t label_sec; // Label of the secondary track
234 Vector V_end; // End vertex: last point on the primary track
235 Vector V_kink; // Kink vertex: reconstructed position of the kink
236 Vector P_sec; // Momentum of secondary track
238 ClassDef(RecKink, 1);
242 /**************************************************************************/
244 /**************************************************************************/
246 class RecV0 : public TObject
251 Vector V_neg; // Vertex of negative track
252 Vector P_neg; // Momentum of negative track
253 Vector V_pos; // Vertex of positive track
254 Vector P_pos; // Momentum of positive track
256 Vector V_ca; // Point of closest approach
257 Vector V0_birth; // Reconstucted birth point of neutral particle
259 // ? Data from simulation.
260 Int_t label; // Neutral mother label read from kinematics
261 Int_t pdg; // PDG code of mother
262 Int_t d_label[2]; // Daughter labels ?? Rec labels present anyway.
267 /**************************************************************************/
268 /**************************************************************************/
270 // Missing primary vertex.
272 // Missing GenInfo, RecInfo.
274 class GenInfo : public TObject
277 Bool_t is_rec; // is reconstructed
284 GenInfo() { is_rec = has_V0 = has_kink = false; }
286 ClassDef(GenInfo, 1);
289 /**************************************************************************/
290 /**************************************************************************/
292 // This whole construction is highly embarrassing. It requires
293 // shameless copying of experiment data. What is good about this
296 // 1) Filters can be applied at copy time so that only part of the
297 // data is copied over.
299 // 2) Once the data is extracted it can be used without experiment
300 // software. Thus, external service can provide this data and local
301 // client can be really thin.
303 // 3) Some pretty advanced visualization schemes/selections can be
304 // implemented in a general framework by providing data extractors
305 // only. This is also good for PR or VIP displays.
307 // 4) These classes can be extended by particular implementations. The
308 // container classes will use TClonesArray with user-specified element
311 // The common behaviour could be implemented entirely without usage of
312 // a common base classes, by just specifying names of members that
313 // retrieve specific data. This is fine as long as one only uses tree
314 // selections but becomes painful for extraction of data into local
315 // structures (could a) use interpreter but this is an overkill and
316 // would cause serious trouble for multi-threaded environment; b) use
317 // member offsets and data-types from the dictionary).