No need for TGeant3 in the include path
[u/mrichter/AliRoot.git] / EMCAL / AliEMCALShishKebabTrd1Module.cxx
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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 33ClassImp(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 43AliEMCALShishKebabTrd1Module::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);
25ab8a31 55 cout<< " theta " << fTheta << " geometry " << g << endl;
1963b290 56}
57
58AliEMCALShishKebabTrd1Module::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 66void 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);
102}
103
104void AliEMCALShishKebabTrd1Module::DefineFirstModule()
105{
25ab8a31 106 // Define first module
1963b290 107 fOK.Set(fga2/2., fgr + fgb/2.); // position the center of module vs o
108
109 // parameters of right line : y = A*z + B in system where zero point is IP.
110 fThetaA = fTheta - fgangle/2.;
111 fA = TMath::Tan(fThetaA);
112 Double_t xA = fga/2. + fga2/2., yA = fgr;
113 fB = yA - fA*xA;
114
115 Double_t kk1 = (fga+fga2)/(2.*4.); // kk1=kk2
e52475ed 116 fOK1.Set(fOK.X() - kk1, fOK.Y()-fgr);
117 fOK2.Set(fOK.X() + kk1, fOK.Y()-fgr);
1963b290 118
119 TObject::SetUniqueID(1); //
120}
121
25ab8a31 122void AliEMCALShishKebabTrd1Module::DefineName(Double_t theta)
1963b290 123{
25ab8a31 124 // Define name of object
125 SetName(Form("%2i(%5.2f)", TObject::GetUniqueID(), theta*TMath::RadToDeg()));
1963b290 126}
127
128Bool_t AliEMCALShishKebabTrd1Module::GetParameters()
129{
25ab8a31 130 // Get needing module parameters from EMCAL geometry
e52475ed 131 if(!fgGeometry) fgGeometry = AliEMCALGeometry::GetInstance();
1963b290 132 TString sn(fgGeometry->GetName()); // 2-Feb-05
133 sn.ToUpper();
134 if(!fgGeometry) {
135 Warning("GetParameters()"," No geometry ");
136 return kFALSE;
137 }
138
139 fga = (Double_t)fgGeometry->GetEtaModuleSize();
140 fgb = (Double_t)fgGeometry->GetLongModuleSize();
141 fgangle = Double_t(fgGeometry->GetTrd1Angle())*TMath::DegToRad();
142 fgtanBetta = TMath::Tan(fgangle/2.);
143 fgr = (Double_t)fgGeometry->GetIPDistance();
144 if(!sn.Contains("TRD2")) fgr += fgGeometry->GetSteelFrontThickness();
145 fga2 = Double_t(fgGeometry->Get2Trd1Dx2());
c4a57092 146 //PH PrintShish(0);
1963b290 147 return kTRUE;
148}
149
150// service methods
c63c3c5d 151void AliEMCALShishKebabTrd1Module::PrintShish(int pri) const
1963b290 152{
25ab8a31 153 // service method
1963b290 154 if(pri>=0) {
e52475ed 155 Info("\n PrintShish()", "\n a %7.3f:%7.3f | b %7.2f | r %7.2f \n TRD1 angle %7.6f(%5.2f) | tanBetta %7.6f",
1963b290 156 fga, fga2, fgb, fgr, fgangle, fgangle*TMath::RadToDeg(), fgtanBetta);
157 printf(" fTheta %f : %5.2f : cos(theta) %f\n",
158 fTheta, GetThetaInDegree(),TMath::Cos(fTheta));
e52475ed 159 if(pri>=1) {
1963b290 160 printf("\n%i |%s| theta %f : fOK.Phi = %f(%5.2f)\n",
161 GetUniqueID(), GetName(), fTheta, fOK.Phi(),fOK.Phi()*TMath::RadToDeg());
162 printf(" A %f B %f | fThetaA %7.6f(%5.2f)\n", fA,fB, fThetaA,fThetaA*TMath::RadToDeg());
1963b290 163 printf(" fOK : X %8.3f: Y %8.3f \n", fOK.X(), fOK.Y());
e52475ed 164 printf(" fOK1 : X %8.3f: Y %8.3f (in SM, ieta=2)\n", fOK1.X(), fOK1.Y());
165 printf(" fOK2 : X %8.3f: Y %8.3f (in SM, ieta=1)\n\n", fOK2.X(), fOK2.Y());
166 fOK.Dump();
1963b290 167 }
168 }
169}
25ab8a31 170
171Double_t AliEMCALShishKebabTrd1Module::GetThetaInDegree() const
172{
173 return fTheta*TMath::RadToDeg();
174}
175
176Double_t AliEMCALShishKebabTrd1Module::GetEtaOfCenterOfModule() const
177{
178 return -TMath::Log(TMath::Tan(fOK.Phi()/2.));
179}