1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////
20 // Handling of ALICE (extrapolated) signals.
24 // Signal positions (r) and reference frames (f) are specified via
25 // SetPosition(r,f) under the following conventions :
27 // f="car" ==> r is Cartesian (x,y,z)
28 // f="sph" ==> r is Spherical (r,theta,phi)
29 // f="cyl" ==> r is Cylindrical (rho,phi,z)
31 // The same holds for SetPositionErrors().
33 // All angles are in radians.
39 // Float_t pos[3]={-1,25,7};
40 // Float_t err[3]={0.03,0.7,0.18};
41 // Float_t signal=120.8;
42 // Float_t error=1.73;
43 // s.SetPosition(pos,"car");
44 // s.SetPositionErrors(err,"car");
45 // s.SetSignal(signal);
46 // s.SetSignalError(error);
47 // Float_t loc[3],dr[3],sigma;
48 // s.GetPosition(loc,"sph");
49 // s.GetPositionErrors(dr,"sph");
50 // Float_t adc=s.GetSignal();
51 // Float_t sigma=s.GetSignalError();
53 // AliSignal q(3); // q can store 3 signal values with their errors
54 // // In the example below a signal contains the
55 // // following data : timing, ADC and dE/dx
56 // q.SetPosition(pos,"car");
57 // q.SetPositionErrors(err,"car");
58 // signal=82.5; // e.q. signal time in ns
60 // q.SetSignal(signal,1);
61 // q.SetSignalError(error,1);
62 // signal=268.1; // e.g. ADC value of signal
64 // q.SetSignal(signal,2);
65 // q.SetSignalError(error,2);
66 // signal=23.7; // e.g. corresponding dE/dx value
68 // q.SetSignal(signal,3);
69 // q.SetSignalError(error,3);
71 //--- Author: Nick van Eijndhoven 23-jan-1999 UU-SAP Utrecht
72 //- Modified: NvE $Date$ UU-SAP Utrecht
73 ///////////////////////////////////////////////////////////////////////////
75 #include "AliSignal.h"
77 ClassImp(AliSignal) // Class implementation to enable ROOT I/O
79 AliSignal::AliSignal(Int_t n)
81 // Creation of an AliSignal object and initialisation of parameters.
82 // A total of n (default n=1) values (with errors) can be stored.
87 ///////////////////////////////////////////////////////////////////////////
88 AliSignal::~AliSignal()
90 // Destructor to delete dynamically allocated memory
102 ///////////////////////////////////////////////////////////////////////////
103 void AliSignal::Reset()
105 // Reset all signal and position values and errors to 0.
106 // The data arrays are also created if not already existing.
108 if (!fSignal) fSignal=new TArrayF(fNvalues);
109 if (!fDsignal) fDsignal=new TArrayF(fNvalues);
111 Double_t r[3]={0,0,0};
112 SetPosition(r,"sph");
114 for (Int_t i=0; i<fSignal->GetSize(); i++)
117 fDsignal->AddAt(0,i);
120 ///////////////////////////////////////////////////////////////////////////
121 void AliSignal::ResetSignals()
123 // Reset all signal values and errors to 0.
124 // The data arrays are also created if not already existing.
126 if (!fSignal) fSignal=new TArrayF(fNvalues);
127 if (!fDsignal) fDsignal=new TArrayF(fNvalues);
129 for (Int_t i=0; i<fSignal->GetSize(); i++)
132 fDsignal->AddAt(0,i);
135 ///////////////////////////////////////////////////////////////////////////
136 void AliSignal::ResetPosition()
138 // Reset position and errors to 0.
139 Double_t r[3]={0,0,0};
140 SetPosition(r,"sph");
143 ///////////////////////////////////////////////////////////////////////////
144 void AliSignal::SetSignal(Double_t sig,Int_t j)
146 // Store j-th (default j=1) signal value.
147 // Note : The first signal value is at j=1.
149 if (!fSignal) ResetSignals();
151 Int_t size=fSignal->GetSize();
154 fSignal->AddAt(float(sig),j-1);
158 cout << "*AliSignal::SetSignal* Index mismatch j : " << j
159 << " size : " << size << endl;
162 ///////////////////////////////////////////////////////////////////////////
163 void AliSignal::AddSignal(Double_t sig,Int_t j)
165 // Add value to j-th (default j=1) signal value.
166 // Note : The first signal value is at j=1.
168 if (!fSignal) ResetSignals();
170 Int_t size=fSignal->GetSize();
173 Float_t sum=(fSignal->At(j-1))+sig;
174 fSignal->AddAt(sum,j-1);
178 cout << "*AliSignal::AddSignal* Index mismatch j : " << j
179 << " size : " << size << endl;
182 ///////////////////////////////////////////////////////////////////////////
183 Float_t AliSignal::GetSignal(Int_t j)
185 // Provide j-th (default j=1) signal value.
186 // Note : The first signal value is at j=1.
189 return fSignal->At(j-1);
196 ///////////////////////////////////////////////////////////////////////////
197 void AliSignal::SetSignalError(Double_t dsig,Int_t j)
199 // Store error on j-th (default j=1) signal value.
200 // Note : The error on the first signal value is at j=1.
202 if (!fDsignal) ResetSignals();
204 Int_t size=fDsignal->GetSize();
207 fDsignal->AddAt(float(dsig),j-1);
211 cout << "*AliSignal::SetSignalError* Index mismatch j : " << j
212 << " size : " << size << endl;
215 ///////////////////////////////////////////////////////////////////////////
216 Float_t AliSignal::GetSignalError(Int_t j)
218 // Provide error on the j-th (default j=1) signal value.
219 // Note : The error on the first signal value is at j=1.
222 return fDsignal->At(j-1);
229 ///////////////////////////////////////////////////////////////////////////
230 void AliSignal::Info(TString f)
232 // Provide signal information within the coordinate frame f
233 cout << " *AliSignal::Info* " << endl;
237 if (fSignal && fDsignal)
239 for (Int_t i=0; i<fSignal->GetSize(); i++)
241 cout << " Signal value : " << fSignal->At(i)
242 << " error : " << fDsignal->At(i) << endl;
246 ///////////////////////////////////////////////////////////////////////////