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1963b290 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-2004, 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 | /* $Id$ */ | |
17 | ||
25ab8a31 | 18 | //_________________________________________________________________________ |
19 | // Main class for TRD1 geometry of Shish-Kebab case. | |
20 | // Author: Aleksei Pavlinov(WSU). | |
21 | // Sep 20004. | |
22 | // See web page with description of Shish-Kebab geometries: | |
23 | // http://pdsfweb01.nersc.gov/~pavlinov/ALICE/SHISHKEBAB/RES/shishkebabALICE.html | |
24 | //_________________________________________________________________________ | |
1963b290 | 25 | |
26 | #include "AliEMCALShishKebabTrd1Module.h" | |
25ab8a31 | 27 | //#include <assert.h> |
1963b290 | 28 | #include "AliEMCALGeometry.h" |
29 | ||
25ab8a31 | 30 | #include <Riostream.h> |
e52475ed | 31 | #include <TMath.h> |
32 | ||
1963b290 | 33 | ClassImp(AliEMCALShishKebabTrd1Module) |
34 | ||
35 | AliEMCALGeometry *AliEMCALShishKebabTrd1Module::fgGeometry=0; | |
36 | Double_t AliEMCALShishKebabTrd1Module::fga=0.; | |
37 | Double_t AliEMCALShishKebabTrd1Module::fga2=0.; | |
38 | Double_t AliEMCALShishKebabTrd1Module::fgb=0.; | |
39 | Double_t AliEMCALShishKebabTrd1Module::fgr=0.; | |
e52475ed | 40 | Double_t AliEMCALShishKebabTrd1Module::fgangle=0.; // around one degree |
1963b290 | 41 | Double_t AliEMCALShishKebabTrd1Module::fgtanBetta=0; // |
42 | ||
25ab8a31 | 43 | AliEMCALShishKebabTrd1Module::AliEMCALShishKebabTrd1Module(Double_t theta, AliEMCALGeometry *g) : TNamed() |
44 | { | |
45 | // theta in radians ; first object shold be with theta=pi/2. | |
1963b290 | 46 | fTheta = theta; |
47 | if(fgGeometry==0) { | |
25ab8a31 | 48 | fTheta = TMath::PiOver2(); |
e52475ed | 49 | fgGeometry = g; |
1963b290 | 50 | if(GetParameters()) { |
51 | DefineFirstModule(); | |
52 | } | |
53 | } else Warning("AliEMCALShishKebabTrd1Module(theta)","You should call this constractor just once !!"); | |
54 | DefineName(fTheta); | |
dc7da436 | 55 | cout<< "AliEMCALShishKebabTrd1Module - first module: theta " << fTheta << " geometry " << g << endl; |
1963b290 | 56 | } |
57 | ||
58 | AliEMCALShishKebabTrd1Module::AliEMCALShishKebabTrd1Module(AliEMCALShishKebabTrd1Module &leftNeighbor) : TNamed() | |
25ab8a31 | 59 | { |
1963b290 | 60 | // printf("** Left Neighbor : %s **\n", leftNeighbor.GetName()); |
61 | TObject::SetUniqueID(leftNeighbor.GetUniqueID()+1); | |
62 | fTheta = leftNeighbor.GetTheta() - fgangle; | |
63 | Init(leftNeighbor.GetA(),leftNeighbor.GetB()); | |
64 | } | |
65 | ||
25ab8a31 | 66 | void AliEMCALShishKebabTrd1Module::Init(Double_t A, Double_t B) |
67 | { | |
68 | // Define parameter module from parameters A,B from previos. | |
1963b290 | 69 | Double_t yl = (fgb/2)*TMath::Sin(fTheta) + (fga/2)*TMath::Cos(fTheta) + fgr, y = yl; |
70 | Double_t xl = (yl - B) / A; // y=A*x+B | |
71 | ||
72 | // Double_t xp1 = (fga/2. + fgb/2.*fgtanBetta)/(TMath::Sin(fTheta) + fgtanBetta*TMath::Cos(fTheta)); | |
73 | // printf(" xp1 %9.3f \n ", xp1); | |
74 | // xp1 == xp => both methods give the same results - 3-feb-05 | |
75 | Double_t alpha = TMath::Pi()/2. + fgangle/2; | |
76 | Double_t xt = (fga+fga2)*TMath::Tan(fTheta)*TMath::Tan(alpha)/(4.*(1.-TMath::Tan(fTheta)*TMath::Tan(alpha))); | |
77 | Double_t yt = xt / TMath::Tan(fTheta), xp = TMath::Sqrt(xt*xt + yt*yt); | |
78 | Double_t x = xl + xp; | |
79 | fOK.Set(x, y); | |
80 | // printf(" yl %9.3f | xl %9.3f | xp %9.3f \n", yl, xl, xp); | |
81 | ||
82 | // have to define A and B; | |
83 | Double_t yCprev = fgr + fga*TMath::Cos(fTheta); | |
84 | Double_t xCprev = (yCprev - B) / A; | |
85 | Double_t xA = xCprev + fga*TMath::Sin(fTheta), yA = fgr; | |
86 | ||
87 | fThetaA = fTheta - fgangle/2.; | |
88 | fA = TMath::Tan(fThetaA); // !! | |
89 | fB = yA - fA*xA; | |
90 | ||
91 | DefineName(fTheta); | |
e52475ed | 92 | // Centers of module |
1963b290 | 93 | Double_t kk1 = (fga+fga2)/(2.*4.); // kk1=kk2 |
94 | ||
95 | Double_t xk1 = fOK.X() - kk1*TMath::Sin(fTheta); | |
e52475ed | 96 | Double_t yk1 = fOK.Y() + kk1*TMath::Cos(fTheta) - fgr; |
1963b290 | 97 | fOK1.Set(xk1,yk1); |
98 | ||
99 | Double_t xk2 = fOK.X() + kk1*TMath::Sin(fTheta); | |
e52475ed | 100 | Double_t yk2 = fOK.Y() - kk1*TMath::Cos(fTheta) - fgr; |
1963b290 | 101 | fOK2.Set(xk2,yk2); |
b44d5aa4 | 102 | |
103 | // May 15, 2006; position of cell face of cells | |
104 | fOB.Set(fOK.X()-fgb/2.*TMath::Cos(fTheta), fOK.Y()-fgb/2.*TMath::Sin(fTheta)-fgr); | |
105 | fOB1.Set(fOB.X()-fga/4.*TMath::Sin(fTheta), fOB.Y()+fga/4.*TMath::Cos(fTheta)); | |
106 | fOB2.Set(fOB.X()+fga/4.*TMath::Sin(fTheta), fOB.Y()-fga/4.*TMath::Cos(fTheta)); | |
1963b290 | 107 | } |
108 | ||
109 | void AliEMCALShishKebabTrd1Module::DefineFirstModule() | |
110 | { | |
25ab8a31 | 111 | // Define first module |
1963b290 | 112 | fOK.Set(fga2/2., fgr + fgb/2.); // position the center of module vs o |
113 | ||
114 | // parameters of right line : y = A*z + B in system where zero point is IP. | |
115 | fThetaA = fTheta - fgangle/2.; | |
116 | fA = TMath::Tan(fThetaA); | |
117 | Double_t xA = fga/2. + fga2/2., yA = fgr; | |
118 | fB = yA - fA*xA; | |
119 | ||
120 | Double_t kk1 = (fga+fga2)/(2.*4.); // kk1=kk2 | |
e52475ed | 121 | fOK1.Set(fOK.X() - kk1, fOK.Y()-fgr); |
122 | fOK2.Set(fOK.X() + kk1, fOK.Y()-fgr); | |
1963b290 | 123 | |
b44d5aa4 | 124 | fOB.Set(fOK.X(),fOK.Y()-fgb/2.-fgr); |
125 | fOB1.Set(fOB.X()-fga/4., fOB.Y()); | |
126 | fOB2.Set(fOB.X()+fga/4., fOB.Y()); | |
127 | ||
1963b290 | 128 | TObject::SetUniqueID(1); // |
129 | } | |
130 | ||
25ab8a31 | 131 | void AliEMCALShishKebabTrd1Module::DefineName(Double_t theta) |
1963b290 | 132 | { |
25ab8a31 | 133 | // Define name of object |
134 | SetName(Form("%2i(%5.2f)", TObject::GetUniqueID(), theta*TMath::RadToDeg())); | |
1963b290 | 135 | } |
136 | ||
137 | Bool_t AliEMCALShishKebabTrd1Module::GetParameters() | |
138 | { | |
25ab8a31 | 139 | // Get needing module parameters from EMCAL geometry |
e52475ed | 140 | if(!fgGeometry) fgGeometry = AliEMCALGeometry::GetInstance(); |
1963b290 | 141 | TString sn(fgGeometry->GetName()); // 2-Feb-05 |
142 | sn.ToUpper(); | |
143 | if(!fgGeometry) { | |
144 | Warning("GetParameters()"," No geometry "); | |
145 | return kFALSE; | |
146 | } | |
147 | ||
148 | fga = (Double_t)fgGeometry->GetEtaModuleSize(); | |
149 | fgb = (Double_t)fgGeometry->GetLongModuleSize(); | |
150 | fgangle = Double_t(fgGeometry->GetTrd1Angle())*TMath::DegToRad(); | |
151 | fgtanBetta = TMath::Tan(fgangle/2.); | |
152 | fgr = (Double_t)fgGeometry->GetIPDistance(); | |
153 | if(!sn.Contains("TRD2")) fgr += fgGeometry->GetSteelFrontThickness(); | |
154 | fga2 = Double_t(fgGeometry->Get2Trd1Dx2()); | |
c4a57092 | 155 | //PH PrintShish(0); |
1963b290 | 156 | return kTRUE; |
157 | } | |
158 | ||
159 | // service methods | |
c63c3c5d | 160 | void AliEMCALShishKebabTrd1Module::PrintShish(int pri) const |
1963b290 | 161 | { |
25ab8a31 | 162 | // service method |
1963b290 | 163 | if(pri>=0) { |
b44d5aa4 | 164 | printf("PrintShish() \n a %7.3f:%7.3f | b %7.2f | r %7.2f \n TRD1 angle %7.6f(%5.2f) | tanBetta %7.6f", |
1963b290 | 165 | fga, fga2, fgb, fgr, fgangle, fgangle*TMath::RadToDeg(), fgtanBetta); |
166 | printf(" fTheta %f : %5.2f : cos(theta) %f\n", | |
167 | fTheta, GetThetaInDegree(),TMath::Cos(fTheta)); | |
e52475ed | 168 | if(pri>=1) { |
b44d5aa4 | 169 | printf(" %i |%s| theta %f : fOK.Phi = %f(%5.2f)\n", |
1963b290 | 170 | GetUniqueID(), GetName(), fTheta, fOK.Phi(),fOK.Phi()*TMath::RadToDeg()); |
171 | printf(" A %f B %f | fThetaA %7.6f(%5.2f)\n", fA,fB, fThetaA,fThetaA*TMath::RadToDeg()); | |
b44d5aa4 | 172 | printf(" fOK : X %9.4f: Y %9.4f \n", fOK.X(), fOK.Y()); |
173 | printf(" fOK1 : X %9.4f: Y %9.4f (local, ieta=2)\n", fOK1.X(), fOK1.Y()); | |
174 | printf(" fOK2 : X %9.4f: Y %9.4f (local, ieta=1)\n\n", fOK2.X(), fOK2.Y()); | |
175 | printf(" fOB : X %9.4f: Y %9.4f \n", fOB.X(), fOB.Y()); | |
176 | printf(" fOB1 : X %9.4f: Y %9.4f (local, ieta=2)\n", fOB1.X(), fOB1.Y()); | |
177 | printf(" fOB2 : X %9.4f: Y %9.4f (local, ieta=1)\n", fOB2.X(), fOB2.Y()); | |
178 | // fOK.Dump(); | |
1963b290 | 179 | } |
180 | } | |
181 | } | |
25ab8a31 | 182 | |
183 | Double_t AliEMCALShishKebabTrd1Module::GetThetaInDegree() const | |
184 | { | |
185 | return fTheta*TMath::RadToDeg(); | |
186 | } | |
187 | ||
188 | Double_t AliEMCALShishKebabTrd1Module::GetEtaOfCenterOfModule() const | |
189 | { | |
190 | return -TMath::Log(TMath::Tan(fOK.Phi()/2.)); | |
191 | } |