Copy constructor implemented.
[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
9e952c39 59 // check Ncontributors, if <0 it means error *gna*
60
04a7657f 61 return kTRUE;
62}
63
64//____________________________________________________________________
7584d357 65Bool_t AliPWG0Helper::IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t adebug)
04a7657f 66{
67 //
25db2d85 68 // this function checks if a particle from the event generator (i.e. among the nPrim particles in the stack)
69 // shall be counted as a primary particle
70 //
04a7657f 71 // This function or a equivalent should be available in some common place of AliRoot
72 //
73
74 // if the particle has a daughter primary, we do not want to count it
75 if (aParticle->GetFirstDaughter() != -1 && aParticle->GetFirstDaughter() < aTotalPrimaries)
76 {
7584d357 77 if (adebug)
25db2d85 78 printf("Dropping particle because it has a daughter among the primaries.\n");
04a7657f 79 return kFALSE;
80 }
81
82 Int_t pdgCode = TMath::Abs(aParticle->GetPdgCode());
83
84 // skip quarks and gluon
85 if (pdgCode <= 10 || pdgCode == 21)
86 {
7584d357 87 if (adebug)
25db2d85 88 printf("Dropping particle because it is a quark or gluon.\n");
04a7657f 89 return kFALSE;
90 }
91
92 if (strcmp(aParticle->GetName(),"XXX") == 0)
93 {
7584d357 94 if (adebug)
25db2d85 95 printf("WARNING: There is a particle named XXX.\n");
04a7657f 96 return kFALSE;
97 }
98
99 TParticlePDG* pdgPart = aParticle->GetPDG();
100
101 if (strcmp(pdgPart->ParticleClass(),"Unknown") == 0)
102 {
7584d357 103 if (adebug)
25db2d85 104 printf("WARNING: There is a particle with an unknown particle class (pdg code %d).\n", pdgCode);
04a7657f 105 return kFALSE;
106 }
107
108 if (pdgPart->Charge() == 0)
109 {
7584d357 110 if (adebug)
25db2d85 111 printf("Dropping particle because it is not charged.\n");
04a7657f 112 return kFALSE;
113 }
114
115 return kTRUE;
116}
847489f7 117
118//____________________________________________________________________
29771dc8 119void AliPWG0Helper::CreateProjections(TH3* hist, Bool_t save)
847489f7 120{
121 // create projections of 3d hists to all 2d combinations
122 // the histograms are not returned, just use them from memory or use this to create them in a file
123
124 TH1* proj = hist->Project3D("yx");
125 proj->SetXTitle(hist->GetXaxis()->GetTitle());
126 proj->SetYTitle(hist->GetYaxis()->GetTitle());
29771dc8 127 if (save)
128 proj->Write();
847489f7 129
130 proj = hist->Project3D("zx");
131 proj->SetXTitle(hist->GetXaxis()->GetTitle());
132 proj->SetYTitle(hist->GetZaxis()->GetTitle());
29771dc8 133 if (save)
134 proj->Write();
847489f7 135
136 proj = hist->Project3D("zy");
137 proj->SetXTitle(hist->GetYaxis()->GetTitle());
138 proj->SetYTitle(hist->GetZaxis()->GetTitle());
29771dc8 139 if (save)
140 proj->Write();
847489f7 141}
1afae8ff 142
143//____________________________________________________________________
29771dc8 144void AliPWG0Helper::CreateDividedProjections(TH3* hist, TH3* hist2, const char* axis, Bool_t putErrors, Bool_t save)
1afae8ff 145{
146 // create projections of the 3d hists divides them
147 // axis decides to which plane, if axis is 0 to all planes
148 // the histograms are not returned, just use them from memory or use this to create them in a file
149
150 if (axis == 0)
151 {
29771dc8 152 CreateDividedProjections(hist, hist2, "yx", putErrors, save);
153 CreateDividedProjections(hist, hist2, "zx", putErrors, save);
154 CreateDividedProjections(hist, hist2, "zy", putErrors, save);
1afae8ff 155
156 return;
157 }
158
159 TH1* proj = hist->Project3D(axis);
0ab29cfa 160
161 if (strlen(axis) == 2)
162 {
163 proj->SetYTitle(GetAxisTitle(hist, axis[0]));
164 proj->SetXTitle(GetAxisTitle(hist, axis[1]));
165 }
166 else if (strlen(axis) == 1)
167 proj->SetXTitle(GetAxisTitle(hist, axis[0]));
1afae8ff 168
169 TH1* proj2 = hist2->Project3D(axis);
0ab29cfa 170 if (strlen(axis) == 2)
171 {
172 proj2->SetYTitle(GetAxisTitle(hist2, axis[0]));
173 proj2->SetXTitle(GetAxisTitle(hist2, axis[1]));
174 }
175 else if (strlen(axis) == 1)
176 proj2->SetXTitle(GetAxisTitle(hist2, axis[0]));
1afae8ff 177
178 TH1* division = dynamic_cast<TH1*> (proj->Clone(Form("%s_div_%s", proj->GetName(), proj2->GetName())));
29771dc8 179 //printf("doing axis: %s, x axis has %d %d bins, min %f %f max %f %f\n", axis, division->GetNbinsX(), proj2->GetNbinsX(), division->GetXaxis()->GetBinLowEdge(1), proj2->GetXaxis()->GetBinLowEdge(1), division->GetXaxis()->GetBinUpEdge(division->GetNbinsX()), proj2->GetXaxis()->GetBinUpEdge(proj2->GetNbinsX()));
180 //printf("doing axis: %s, y axis has %d %d bins, min %f %f max %f %f\n", axis, division->GetNbinsY(), proj2->GetNbinsY(), division->GetYaxis()->GetBinLowEdge(1), proj2->GetYaxis()->GetBinLowEdge(1), division->GetYaxis()->GetBinUpEdge(division->GetNbinsY()), proj2->GetYaxis()->GetBinUpEdge(proj2->GetNbinsY()));
9e952c39 181 division->Divide(proj, proj2, 1, 1, "B");
29771dc8 182 division->SetTitle(Form("%s divided %s", proj->GetTitle(), proj2->GetTitle()));
0ab29cfa 183
184 if (putErrors)
185 {
186 division->Sumw2();
187 if (division->GetDimension() == 1)
188 {
189 Int_t nBins = division->GetNbinsX();
29771dc8 190 for (Int_t i = 1; i <= nBins; ++i)
0ab29cfa 191 if (proj2->GetBinContent(i) != 0)
192 division->SetBinError(i, TMath::Sqrt(proj->GetBinContent(i)) / proj2->GetBinContent(i));
193 }
194 else if (division->GetDimension() == 2)
195 {
196 Int_t nBinsX = division->GetNbinsX();
197 Int_t nBinsY = division->GetNbinsY();
29771dc8 198 for (Int_t i = 1; i <= nBinsX; ++i)
199 for (Int_t j = 1; j <= nBinsY; ++j)
0ab29cfa 200 if (proj2->GetBinContent(i, j) != 0)
201 division->SetBinError(i, j, TMath::Sqrt(proj->GetBinContent(i, j)) / proj2->GetBinContent(i, j));
202 }
203 }
29771dc8 204
205 if (save)
206 {
207 proj->Write();
208 proj2->Write();
209 division->Write();
210 }
1afae8ff 211}
212
92d2d8ad 213//____________________________________________________________________
25db2d85 214const char* AliPWG0Helper::GetAxisTitle(TH3* hist, const char axis)
92d2d8ad 215{
216 // returns the title of the axis given in axis (x, y, z)
217
218 if (axis == 'x')
219 return hist->GetXaxis()->GetTitle();
220 else if (axis == 'y')
221 return hist->GetYaxis()->GetTitle();
222 else if (axis == 'z')
223 return hist->GetZaxis()->GetTitle();
224
225 return 0;
226}