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b0f5e3fc | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
18 | Revision 1.1.2.2 2000/06/12 18:09:36 barbera | |
19 | fixed posible compilation errors on HP unix | |
20 | ||
21 | Revision 1.1.2.1 2000/01/12 20:21:30 nilsen | |
22 | missed AliITSetfSDD files ealier | |
23 | ||
24 | $Name$ | |
25 | $Author$ | |
26 | $Id$ | |
27 | */ | |
28 | ||
29 | #include <iostream.h> | |
30 | #include <TMath.h> | |
31 | #include "AliITSetfSDD.h" | |
32 | ||
33 | //////////////////////////////////////////////////////////////////////// | |
34 | // Version: 0 | |
35 | // Written by Piergiorgio Cerello | |
36 | // November 23 1999 | |
37 | // | |
38 | // AliITSmapSDD is the map of SDDs. | |
39 | // | |
40 | //Begin_Html | |
41 | /* | |
42 | <img src="picts/ITS/AliITShit_Class_Diagram.gif"> | |
43 | </pre> | |
44 | <br clear=left> | |
45 | <font size=+2 color=red> | |
46 | <p>This show the relasionships between the ITS hit class and the rest of Aliroot. | |
47 | </font> | |
48 | <pre> | |
49 | */ | |
50 | //End_Htm | |
51 | //extern Int_t power(Int_t b, Int_t e); | |
52 | ||
53 | //_____________________________________________________________________________ | |
54 | ClassImp(AliITSetfSDD) | |
55 | ||
56 | Int_t ppower(Int_t b, Int_t e) { | |
57 | Int_t power = 1,i; | |
58 | for(i=0; i<e; i++) power *= b; | |
59 | return power; | |
60 | } | |
61 | ||
62 | AliITSetfSDD::AliITSetfSDD(Double_t timeclock) | |
63 | { | |
64 | // sampling time in ns | |
65 | fSamplingTime = 1000./timeclock; | |
66 | fT0 = 0.; | |
67 | fDf = ppower(10,9)/(fMaxNofSamples*fSamplingTime); | |
68 | fA0 = 9000.; | |
69 | ||
70 | Int_t i,j,k; | |
71 | for(i=0; i<fMaxNofPoles; i++) { | |
72 | fZero_M[i] = 0.; | |
73 | fZero_R[i] = 0.; | |
74 | fZero_I[i] = 0.; | |
75 | fPole_M[i] = 0.; | |
76 | fPole_R[i] = 0.; | |
77 | fPole_I[i] = 0.; | |
78 | } | |
79 | fPole_M[0] = 1.; | |
80 | fPole_R[0] = -2100000.; | |
81 | fPole_I[0] = fPole_R[0]; | |
82 | fPole_M[1] = 1.; | |
83 | fPole_R[1] = -2100000.; | |
84 | fPole_I[1] = -fPole_R[1]; | |
85 | ||
86 | // Compute Transfer Function | |
87 | ||
88 | Double_t PI = acos(-1.); | |
89 | for(i=0; i<=fMaxNofSamples/2; i++) { | |
90 | Double_t frequency = fDf*i; | |
91 | Double_t VM = fA0; | |
92 | Double_t VA = 0.; | |
93 | for(k=0; k<fMaxNofPoles; k++) { | |
94 | if(fZero_M[k]) { | |
95 | Double_t VZR = -fZero_R[k]; | |
96 | Double_t VZI = frequency - fZero_I[k]; | |
97 | Double_t VZM = TMath::Sqrt(VZR*VZR+VZI*VZI); | |
98 | Double_t VZA = TMath::ATan2(VZI,VZR); | |
99 | // cout << "VZM: " << VZM << ", VZA: " << VZA << endl; | |
100 | // cout << "VZR: " << VZR << ", VZI: " << VZI << endl; | |
101 | for(j=1; j<= (Int_t) fZero_M[k]; j++) { | |
102 | VM *= VZM; | |
103 | VA += VZA; | |
104 | if(VA >= PI) VA -= (2.*PI); | |
105 | if(VA <= -PI) VA += (2.*PI); | |
106 | //cout << "VM: " << VM << ", VA: " << VA << endl; | |
107 | } | |
108 | } | |
109 | ||
110 | if(fPole_M[k]) { | |
111 | Double_t VPR = -fPole_R[k]; | |
112 | Double_t VPI = frequency - fPole_I[k]; | |
113 | Double_t VPM = TMath::Sqrt(VPR*VPR+VPI*VPI); | |
114 | Double_t VPA = TMath::ATan2(VPI,VPR); | |
115 | //cout << "VPM: " << VPM << ", VPA: " << VPA << endl; | |
116 | //cout << "VPR: " << VPR << ", VPI: " << VPI << endl; | |
117 | for(j=1; j<= (Int_t) fPole_M[k]; j++) { | |
118 | VM /= VPM; | |
119 | VA -= VPA; | |
120 | if(VA >= PI) VA -= (2.*PI); | |
121 | if(VA <= -PI) VA += (2.*PI); | |
122 | //cout << "VM: " << VM << ", VA: " << VA << endl; | |
123 | } | |
124 | } | |
125 | Double_t VR = VM*cos(VA); | |
126 | Double_t VI = VM*sin(VA); | |
127 | //cout << "VM: " << VM << ", VA: " << VA << endl; | |
128 | //cout << "VR: " << VR << ", VI: " << VI << endl; | |
129 | fTf_R[i] = VR*ppower(10,9); | |
130 | fTf_I[i] = VI*ppower(10,9); | |
131 | //cout << "fTf_R[" << i << "] = " << fTf_R[i] << endl; | |
132 | //cout << "fTf_I[" << i << "] = " << fTf_I[i] << endl; | |
133 | if(i) { | |
134 | fTf_R[fMaxNofSamples-i] = fTf_R[i]; | |
135 | fTf_I[fMaxNofSamples-i] = -fTf_I[i]; | |
136 | } | |
137 | } | |
138 | } | |
139 | ||
140 | // Compute Fourier Weights | |
141 | ||
142 | for(i=0; i<=fMaxNofSamples/2; i++) { | |
143 | fW_R[i] = cos(-2.*PI*i/fMaxNofSamples); | |
144 | fW_I[i] = sin(-2.*PI*i/fMaxNofSamples); | |
145 | if(i) { | |
146 | fW_R[fMaxNofSamples-i] = fW_R[i]; | |
147 | fW_I[fMaxNofSamples-i] = -fW_I[i]; | |
148 | } | |
149 | } | |
150 | ||
151 | } | |
152 | ||
153 | void AliITSetfSDD::Print() | |
154 | { | |
155 | Int_t i; | |
156 | cout << "Sampling Time " << fSamplingTime << endl; | |
157 | cout << "Number of Time Samples " << fMaxNofSamples << endl; | |
158 | cout << "fT0 " << fT0 << endl; | |
159 | cout << "fDf " << fDf << endl; | |
160 | cout << "fA0 " << fA0 << endl; | |
161 | ||
162 | cout << "Zero's and Pole's" << endl; | |
163 | cout << "fZero_M " << endl; | |
164 | for(i=0; i<fMaxNofPoles; i++) cout << fZero_M[i] << endl; | |
165 | cout << "fZero_R " << endl; | |
166 | for(i=0; i<fMaxNofPoles; i++) cout << fZero_R[i] << endl; | |
167 | cout << "fZero_I " << endl; | |
168 | for(i=0; i<fMaxNofPoles; i++) cout << fZero_I[i] << endl; | |
169 | cout << "fPole_M " << endl; | |
170 | for(i=0; i<fMaxNofPoles; i++) cout << fPole_M[i] << endl; | |
171 | cout << "fPole_R " << endl; | |
172 | for(i=0; i<fMaxNofPoles; i++) cout << fPole_R[i] << endl; | |
173 | cout << "fPole_I " << endl; | |
174 | for(i=0; i<fMaxNofPoles; i++) cout << fPole_I[i] << endl; | |
175 | ||
176 | cout << "Transfer function" << endl; | |
177 | cout << "Real Part" << endl; | |
178 | for(i=0; i<fMaxNofSamples; i++) cout << fTf_R[i] << endl; | |
179 | cout << "Imaginary Part " << endl; | |
180 | for(i=0; i<fMaxNofSamples; i++) cout << fTf_I[i] << endl; | |
181 | ||
182 | cout << "Fourier Weights" << endl; | |
183 | cout << "Real Part" << endl; | |
184 | for(i=0; i<fMaxNofSamples; i++) cout << fW_R[i] << endl; | |
185 | cout << "Imaginary Part " << endl; | |
186 | for(i=0; i<fMaxNofSamples; i++) cout << fW_I[i] << endl; | |
187 | } | |
188 | ||
189 | ||
190 | ||
191 | ||
192 | ||
193 | ||
194 | ||
195 |