updating makefile to include evgen headers to compile systematics selector
[u/mrichter/AliRoot.git] / PWG0 / AliPWG0Helper.cxx
CommitLineData
04a7657f 1/* $Id$ */
2
3#include <AliPWG0Helper.h>
4
5#include <TParticle.h>
6#include <TParticlePDG.h>
847489f7 7#include <TH1.h>
25db2d85 8#include <TH3.h>
04a7657f 9
10#include <AliLog.h>
11#include <AliESD.h>
12#include <AliESDVertex.h>
13
14//____________________________________________________________________
15ClassImp(AliPWG0Helper)
16
17//____________________________________________________________________
18Bool_t AliPWG0Helper::IsEventTriggered(AliESD* aEsd)
19{
20 // check if the event was triggered
21 //
5c495d37 22 // this function needs the branch fTriggerMask
23 //
04a7657f 24 // MB should be
25 // ITS_SPD_GFO_L0 : 32
26 // VZERO_OR_LEFT : 1
27 // VZERO_OR_RIGHT : 2
28
29 ULong64_t triggerMask = aEsd->GetTriggerMask();
30
31 if (triggerMask&32 && ((triggerMask&1) || (triggerMask&2)))
32 return kTRUE;
33
34 return kFALSE;
35}
36
37//____________________________________________________________________
38Bool_t AliPWG0Helper::IsVertexReconstructed(AliESD* aEsd)
39{
40 // checks if the vertex is reasonable
5c495d37 41 //
42 // this function needs the branches fSPDVertex*
43
04a7657f 44
45 const AliESDVertex* vtxESD = aEsd->GetVertex();
46
47 // the vertex should be reconstructed
48 if (strcmp(vtxESD->GetName(), "default")==0)
49 return kFALSE;
50
51 Double_t vtx_res[3];
52 vtx_res[0] = vtxESD->GetXRes();
53 vtx_res[1] = vtxESD->GetYRes();
54 vtx_res[2] = vtxESD->GetZRes();
55
56 if (vtx_res[2]==0 || vtx_res[2]>0.1)
57 return kFALSE;
58
59 return kTRUE;
60}
61
62//____________________________________________________________________
25db2d85 63Bool_t AliPWG0Helper::IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t debug)
04a7657f 64{
65 //
25db2d85 66 // this function checks if a particle from the event generator (i.e. among the nPrim particles in the stack)
67 // shall be counted as a primary particle
68 //
04a7657f 69 // This function or a equivalent should be available in some common place of AliRoot
70 //
71
72 // if the particle has a daughter primary, we do not want to count it
73 if (aParticle->GetFirstDaughter() != -1 && aParticle->GetFirstDaughter() < aTotalPrimaries)
74 {
25db2d85 75 if (debug)
76 printf("Dropping particle because it has a daughter among the primaries.\n");
04a7657f 77 return kFALSE;
78 }
79
80 Int_t pdgCode = TMath::Abs(aParticle->GetPdgCode());
81
82 // skip quarks and gluon
83 if (pdgCode <= 10 || pdgCode == 21)
84 {
25db2d85 85 if (debug)
86 printf("Dropping particle because it is a quark or gluon.\n");
04a7657f 87 return kFALSE;
88 }
89
90 if (strcmp(aParticle->GetName(),"XXX") == 0)
91 {
25db2d85 92 if (debug)
93 printf("WARNING: There is a particle named XXX.\n");
04a7657f 94 return kFALSE;
95 }
96
97 TParticlePDG* pdgPart = aParticle->GetPDG();
98
99 if (strcmp(pdgPart->ParticleClass(),"Unknown") == 0)
100 {
25db2d85 101 if (debug)
102 printf("WARNING: There is a particle with an unknown particle class (pdg code %d).\n", pdgCode);
04a7657f 103 return kFALSE;
104 }
105
106 if (pdgPart->Charge() == 0)
107 {
25db2d85 108 if (debug)
109 printf("Dropping particle because it is not charged.\n");
04a7657f 110 return kFALSE;
111 }
112
113 return kTRUE;
114}
847489f7 115
116//____________________________________________________________________
25db2d85 117void AliPWG0Helper::CreateProjections(TH3* hist)
847489f7 118{
119 // create projections of 3d hists to all 2d combinations
120 // the histograms are not returned, just use them from memory or use this to create them in a file
121
122 TH1* proj = hist->Project3D("yx");
123 proj->SetXTitle(hist->GetXaxis()->GetTitle());
124 proj->SetYTitle(hist->GetYaxis()->GetTitle());
125
126 proj = hist->Project3D("zx");
127 proj->SetXTitle(hist->GetXaxis()->GetTitle());
128 proj->SetYTitle(hist->GetZaxis()->GetTitle());
129
130 proj = hist->Project3D("zy");
131 proj->SetXTitle(hist->GetYaxis()->GetTitle());
132 proj->SetYTitle(hist->GetZaxis()->GetTitle());
133}
1afae8ff 134
135//____________________________________________________________________
0ab29cfa 136void AliPWG0Helper::CreateDividedProjections(TH3* hist, TH3* hist2, const char* axis, Bool_t putErrors)
1afae8ff 137{
138 // create projections of the 3d hists divides them
139 // axis decides to which plane, if axis is 0 to all planes
140 // the histograms are not returned, just use them from memory or use this to create them in a file
141
142 if (axis == 0)
143 {
0ab29cfa 144 CreateDividedProjections(hist, hist2, "yx", putErrors);
145 CreateDividedProjections(hist, hist2, "zx", putErrors);
146 CreateDividedProjections(hist, hist2, "zy", putErrors);
1afae8ff 147
148 return;
149 }
150
151 TH1* proj = hist->Project3D(axis);
0ab29cfa 152
153 if (strlen(axis) == 2)
154 {
155 proj->SetYTitle(GetAxisTitle(hist, axis[0]));
156 proj->SetXTitle(GetAxisTitle(hist, axis[1]));
157 }
158 else if (strlen(axis) == 1)
159 proj->SetXTitle(GetAxisTitle(hist, axis[0]));
1afae8ff 160
161 TH1* proj2 = hist2->Project3D(axis);
0ab29cfa 162 if (strlen(axis) == 2)
163 {
164 proj2->SetYTitle(GetAxisTitle(hist2, axis[0]));
165 proj2->SetXTitle(GetAxisTitle(hist2, axis[1]));
166 }
167 else if (strlen(axis) == 1)
168 proj2->SetXTitle(GetAxisTitle(hist2, axis[0]));
1afae8ff 169
170 TH1* division = dynamic_cast<TH1*> (proj->Clone(Form("%s_div_%s", proj->GetName(), proj2->GetName())));
171 division->Divide(proj2);
0ab29cfa 172
173 if (putErrors)
174 {
175 division->Sumw2();
176 if (division->GetDimension() == 1)
177 {
178 Int_t nBins = division->GetNbinsX();
179 for (Int_t i = 0; i <= nBins; ++i)
180 if (proj2->GetBinContent(i) != 0)
181 division->SetBinError(i, TMath::Sqrt(proj->GetBinContent(i)) / proj2->GetBinContent(i));
182 }
183 else if (division->GetDimension() == 2)
184 {
185 Int_t nBinsX = division->GetNbinsX();
186 Int_t nBinsY = division->GetNbinsY();
187 for (Int_t i = 0; i <= nBinsX; ++i)
188 for (Int_t j = 0; j <= nBinsY; ++j)
189 if (proj2->GetBinContent(i, j) != 0)
190 division->SetBinError(i, j, TMath::Sqrt(proj->GetBinContent(i, j)) / proj2->GetBinContent(i, j));
191 }
192 }
1afae8ff 193}
194
92d2d8ad 195//____________________________________________________________________
25db2d85 196const char* AliPWG0Helper::GetAxisTitle(TH3* hist, const char axis)
92d2d8ad 197{
198 // returns the title of the axis given in axis (x, y, z)
199
200 if (axis == 'x')
201 return hist->GetXaxis()->GetTitle();
202 else if (axis == 'y')
203 return hist->GetYaxis()->GetTitle();
204 else if (axis == 'z')
205 return hist->GetZaxis()->GetTitle();
206
207 return 0;
208}