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RKTrackRep.h
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1 /* Copyright 2008-2010, Technische Universitaet Muenchen,
2  Authors: Christian Hoeppner & Sebastian Neubert & Johannes Rauch
3 
4  This file is part of GENFIT.
5 
6  GENFIT is free software: you can redistribute it and/or modify
7  it under the terms of the GNU Lesser General Public License as published
8  by the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10 
11  GENFIT is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  GNU Lesser General Public License for more details.
15 
16  You should have received a copy of the GNU Lesser General Public License
17  along with GENFIT. If not, see <http://www.gnu.org/licenses/>.
18 */
19 
24 #ifndef genfit_RKTrackRep_h
25 #define genfit_RKTrackRep_h
26 
27 #include "AbsTrackRep.h"
28 #include "StateOnPlane.h"
29 #include "RKTools.h"
30 #include "StepLimits.h"
31 #include "Material.h"
32 
33 #include <algorithm>
34 
35 namespace genfit {
36 
40 struct RKStep {
41  MatStep matStep_; // material properties and stepsize
42  M1x7 state7_; // 7D state vector
43  StepLimits limits_;
44 
45  RKStep() {
46  std::fill(state7_.begin(), state7_.end(), 0);
47  }
48 };
49 
50 
54 struct ExtrapStep {
55  M7x7 jac7_; // 5D jacobian of transport
56  M7x7 noise7_; // 5D noise matrix
57 
58  ExtrapStep() {
59  std::fill(jac7_.begin(), jac7_.end(), 0);
60  std::fill(noise7_.begin(), noise7_.end(), 0);
61  }
62 };
63 
64 
72 class RKTrackRep : public AbsTrackRep {
73  friend class RKTrackRepTests_momMag_Test;
74  friend class RKTrackRepTests_calcForwardJacobianAndNoise_Test;
75  friend class RKTrackRepTests_getState7_Test;
76  friend class RKTrackRepTests_getState5_Test;
77 
78  public:
79 
80  RKTrackRep();
81  RKTrackRep(int pdgCode, char propDir = 0);
82 
83  virtual ~RKTrackRep();
84 
85  virtual AbsTrackRep* clone() const override {return new RKTrackRep(*this);}
86 
87  virtual double extrapolateToPlane(StateOnPlane& state,
88  const SharedPlanePtr& plane,
89  bool stopAtBoundary = false,
90  bool calcJacobianNoise = false) const override;
91 
92  using AbsTrackRep::extrapolateToLine;
93 
94  virtual double extrapolateToLine(StateOnPlane& state,
95  const TVector3& linePoint,
96  const TVector3& lineDirection,
97  bool stopAtBoundary = false,
98  bool calcJacobianNoise = false) const override;
99 
100  virtual double extrapolateToPoint(StateOnPlane& state,
101  const TVector3& point,
102  bool stopAtBoundary = false,
103  bool calcJacobianNoise = false) const override {
104  return extrapToPoint(state, point, nullptr, stopAtBoundary, calcJacobianNoise);
105  }
106 
107  virtual double extrapolateToPoint(StateOnPlane& state,
108  const TVector3& point,
109  const TMatrixDSym& G, // weight matrix (metric)
110  bool stopAtBoundary = false,
111  bool calcJacobianNoise = false) const override {
112  return extrapToPoint(state, point, &G, stopAtBoundary, calcJacobianNoise);
113  }
114 
115  virtual double extrapolateToCylinder(StateOnPlane& state,
116  double radius,
117  const TVector3& linePoint = TVector3(0.,0.,0.),
118  const TVector3& lineDirection = TVector3(0.,0.,1.),
119  bool stopAtBoundary = false,
120  bool calcJacobianNoise = false) const override;
121 
122 
123  virtual double extrapolateToCone(StateOnPlane& state,
124  double radius,
125  const TVector3& linePoint = TVector3(0.,0.,0.),
126  const TVector3& lineDirection = TVector3(0.,0.,1.),
127  bool stopAtBoundary = false,
128  bool calcJacobianNoise = false) const override ;
129 
130  virtual double extrapolateToSphere(StateOnPlane& state,
131  double radius,
132  const TVector3& point = TVector3(0.,0.,0.),
133  bool stopAtBoundary = false,
134  bool calcJacobianNoise = false) const override;
135 
136  virtual double extrapolateBy(StateOnPlane& state,
137  double step,
138  bool stopAtBoundary = false,
139  bool calcJacobianNoise = false) const override;
140 
141 
142  unsigned int getDim() const override {return 5;}
143 
144  virtual TVector3 getPos(const StateOnPlane& state) const override;
145 
146  virtual TVector3 getMom(const StateOnPlane& state) const override;
147  virtual void getPosMom(const StateOnPlane& state, TVector3& pos, TVector3& mom) const override;
148 
149  virtual double getMomMag(const StateOnPlane& state) const override;
150  virtual double getMomVar(const MeasuredStateOnPlane& state) const override;
151 
152  virtual TMatrixDSym get6DCov(const MeasuredStateOnPlane& state) const override;
153  virtual void getPosMomCov(const MeasuredStateOnPlane& state, TVector3& pos, TVector3& mom, TMatrixDSym& cov) const override;
154  virtual double getCharge(const StateOnPlane& state) const override;
155  virtual double getQop(const StateOnPlane& state) const override {return state.getState()(0);}
156  double getSpu(const StateOnPlane& state) const;
157  double getTime(const StateOnPlane& state) const override;
158 
159  virtual void getForwardJacobianAndNoise(TMatrixD& jacobian, TMatrixDSym& noise, TVectorD& deltaState) const override;
160 
161  virtual void getBackwardJacobianAndNoise(TMatrixD& jacobian, TMatrixDSym& noise, TVectorD& deltaState) const override;
162 
163  std::vector<genfit::MatStep> getSteps() const override;
164 
165  virtual double getRadiationLenght() const override;
166 
167  virtual void setPosMom(StateOnPlane& state, const TVector3& pos, const TVector3& mom) const override;
168  virtual void setPosMom(StateOnPlane& state, const TVectorD& state6) const override;
169  virtual void setPosMomErr(MeasuredStateOnPlane& state, const TVector3& pos, const TVector3& mom, const TVector3& posErr, const TVector3& momErr) const override;
170  virtual void setPosMomCov(MeasuredStateOnPlane& state, const TVector3& pos, const TVector3& mom, const TMatrixDSym& cov6x6) const override;
171  virtual void setPosMomCov(MeasuredStateOnPlane& state, const TVectorD& state6, const TMatrixDSym& cov6x6) const override;
172 
173  virtual void setChargeSign(StateOnPlane& state, double charge) const override;
174  virtual void setQop(StateOnPlane& state, double qop) const override {state.getState()(0) = qop;}
175 
176  void setSpu(StateOnPlane& state, double spu) const;
177  void setTime(StateOnPlane& state, double time) const override;
178 
180 
188  double RKPropagate(M1x7& state7,
189  M7x7* jacobian,
190  M1x3& SA,
191  double S,
192  bool varField = true,
193  bool calcOnlyLastRowOfJ = false) const;
194 
195  virtual bool isSameType(const AbsTrackRep* other) override;
196  virtual bool isSame(const AbsTrackRep* other) override;
197 
198  private:
199 
200  void initArrays() const;
201 
202  virtual double extrapToPoint(StateOnPlane& state,
203  const TVector3& point,
204  const TMatrixDSym* G = nullptr, // weight matrix (metric)
205  bool stopAtBoundary = false,
206  bool calcJacobianNoise = false) const;
207 
208  void getState7(const StateOnPlane& state, M1x7& state7) const;
209  void getState5(StateOnPlane& state, const M1x7& state7) const; // state7 must already lie on plane of state!
210 
211  void calcJ_pM_5x7(M5x7& J_pM, const TVector3& U, const TVector3& V, const M1x3& pTilde, double spu) const;
212 
213  void transformPM6(const MeasuredStateOnPlane& state,
214  M6x6& out6x6) const;
215 
216  void calcJ_Mp_7x5(M7x5& J_Mp, const TVector3& U, const TVector3& V, const TVector3& W, const M1x3& A) const;
217 
218  void calcForwardJacobianAndNoise(const M1x7& startState7, const DetPlane& startPlane,
219  const M1x7& destState7, const DetPlane& destPlane) const;
220 
221  void transformM6P(const M6x6& in6x6,
222  const M1x7& state7,
223  MeasuredStateOnPlane& state) const; // plane and charge must already be set!
224 
226 
235  bool RKutta(const M1x4& SU,
236  const DetPlane& plane,
237  double charge,
238  double mass,
239  M1x7& state7,
240  M7x7* jacobianT,
241  M1x7* J_MMT_unprojected_lastRow,
242  double& coveredDistance, // signed
243  double& flightTime,
244  bool& checkJacProj,
245  M7x7& noiseProjection,
246  StepLimits& limits,
247  bool onlyOneStep = false,
248  bool calcOnlyLastRowOfJ = false) const;
249 
250  double estimateStep(const M1x7& state7,
251  const M1x4& SU,
252  const DetPlane& plane,
253  const double& charge,
254  double& relMomLoss,
255  StepLimits& limits) const;
256 
257  TVector3 pocaOnLine(const TVector3& linePoint,
258  const TVector3& lineDirection,
259  const TVector3& point) const;
260 
262 
270  double Extrap(const DetPlane& startPlane, // plane where Extrap starts
271  const DetPlane& destPlane, // plane where Extrap has to extrapolate to
272  double charge,
273  double mass,
274  bool& isAtBoundary,
275  M1x7& state7,
276  double& flightTime,
277  bool fillExtrapSteps,
278  TMatrixDSym* cov = nullptr,
279  bool onlyOneStep = false,
280  bool stopAtBoundary = false,
281  double maxStep = 1.E99) const;
282 
283  void checkCache(const StateOnPlane& state, const SharedPlanePtr* plane) const;
284 
285  double momMag(const M1x7& state7) const;
286 
287 
288  mutable StateOnPlane lastStartState_;
289  mutable StateOnPlane lastEndState_;
290  mutable std::vector<RKStep> RKSteps_;
291  mutable int RKStepsFXStart_;
292  mutable int RKStepsFXStop_;
293  mutable std::vector<ExtrapStep> ExtrapSteps_;
294 
295  mutable TMatrixD fJacobian_;
296  mutable TMatrixDSym fNoise_;
297 
298  mutable bool useCache_;
299  mutable unsigned int cachePos_;
300 
301  // auxiliary variables and arrays
302  // needed in Extrap()
303  mutable StepLimits limits_;
304  mutable M7x7 noiseArray_;
305  mutable M7x7 noiseProjection_;
306  mutable M7x7 J_MMT_;
307 
308  public:
309 
310  ClassDefOverride(RKTrackRep, 1)
311 
312 };
313 
314 } /* End of namespace genfit */
317 #endif // genfit_RKTrackRep_h