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GPUTPCTrackLinearisation.h
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1 // Copyright CERN and copyright holders of ALICE O2. This software is
2 // distributed under the terms of the GNU General Public License v3 (GPL
3 // Version 3), copied verbatim in the file "COPYING".
4 //
5 // See http://alice-o2.web.cern.ch/license for full licensing information.
6 //
7 // In applying this license CERN does not waive the privileges and immunities
8 // granted to it by virtue of its status as an Intergovernmental Organization
9 // or submit itself to any jurisdiction.
10 
13 
14 #ifndef GPUTPCTRACKLINEARISATION_H
15 #define GPUTPCTRACKLINEARISATION_H
16 
17 #include "GPUTPCTrackParam.h"
18 
33 class GPUTPCTrackLinearisation
34 {
35  public:
36  GPUTPCTrackLinearisation() : mSinPhi(0), mCosPhi(1), mDzDs(0), mQPt(0) {}
37  GPUTPCTrackLinearisation(double SinPhi1, double CosPhi1, double DzDs1, double QPt1) : mSinPhi(SinPhi1), mCosPhi(CosPhi1), mDzDs(DzDs1), mQPt(QPt1) {}
38 
39  GPUTPCTrackLinearisation(const GPUTPCTrackParam& t);
40 
41  void Set(double SinPhi1, double CosPhi1, double DzDs1, double QPt1);
42 
43  double SinPhi() const { return mSinPhi; }
44  double CosPhi() const { return mCosPhi; }
45  double DzDs() const { return mDzDs; }
46  double QPt() const { return mQPt; }
47 
48  double GetSinPhi() const { return mSinPhi; }
49  double GetCosPhi() const { return mCosPhi; }
50  double GetDzDs() const { return mDzDs; }
51  double GetQPt() const { return mQPt; }
52 
53  void SetSinPhi(double v) { mSinPhi = v; }
54  void SetCosPhi(double v) { mCosPhi = v; }
55  void SetDzDs(double v) { mDzDs = v; }
56  void SetQPt(double v) { mQPt = v; }
57 
58  private:
59  double mSinPhi; // SinPhi
60  double mCosPhi; // CosPhi
61  double mDzDs; // DzDs
62  double mQPt; // QPt
63 };
64 
65 inline GPUTPCTrackLinearisation::GPUTPCTrackLinearisation(const GPUTPCTrackParam& t) : mSinPhi(t.SinPhi()), mCosPhi(0), mDzDs(t.DzDs()), mQPt(t.QPt())
66 {
67  if (mSinPhi > GPUCA_MAX_SIN_PHI) {
68  mSinPhi = GPUCA_MAX_SIN_PHI;
69  } else if (mSinPhi < -GPUCA_MAX_SIN_PHI) {
70  mSinPhi = -GPUCA_MAX_SIN_PHI;
71  }
72  mCosPhi = sqrt(1 - mSinPhi * mSinPhi);
73  if (t.SignCosPhi() < 0) {
74  mCosPhi = -mCosPhi;
75  }
76 }
77 
78 inline void GPUTPCTrackLinearisation::Set(double SinPhi1, double CosPhi1, double DzDs1, double QPt1)
79 {
80  SetSinPhi(SinPhi1);
81  SetCosPhi(CosPhi1);
82  SetDzDs(DzDs1);
83  SetQPt(QPt1);
84 }
85 
86 #endif // GPUTPCTRACKLINEARISATION_H