Classed moved form libJETANMC to libJETAN.
[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//____________________________________________________________________
e9c3977b 18Bool_t AliPWG0Helper::IsEventTriggered(AliESD* aEsd, Trigger trigger)
04a7657f 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
e9c3977b 31 switch (trigger)
32 {
33 case kMB1:
34 {
35 if (triggerMask&32 || ((triggerMask&1) || (triggerMask&2)))
36 return kTRUE;
37 break;
38 }
39 case kMB2:
40 {
41 if (triggerMask&32 && ((triggerMask&1) || (triggerMask&2)))
42 return kTRUE;
43 break;
44 }
45 }
04a7657f 46
47 return kFALSE;
48}
49
50//____________________________________________________________________
51Bool_t AliPWG0Helper::IsVertexReconstructed(AliESD* aEsd)
52{
53 // checks if the vertex is reasonable
5c495d37 54 //
55 // this function needs the branches fSPDVertex*
56
04a7657f 57
58 const AliESDVertex* vtxESD = aEsd->GetVertex();
59
60 // the vertex should be reconstructed
61 if (strcmp(vtxESD->GetName(), "default")==0)
62 return kFALSE;
63
64 Double_t vtx_res[3];
65 vtx_res[0] = vtxESD->GetXRes();
66 vtx_res[1] = vtxESD->GetYRes();
67 vtx_res[2] = vtxESD->GetZRes();
68
69 if (vtx_res[2]==0 || vtx_res[2]>0.1)
70 return kFALSE;
71
9e952c39 72 // check Ncontributors, if <0 it means error *gna*
73
04a7657f 74 return kTRUE;
75}
76
77//____________________________________________________________________
7584d357 78Bool_t AliPWG0Helper::IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t adebug)
04a7657f 79{
80 //
25db2d85 81 // this function checks if a particle from the event generator (i.e. among the nPrim particles in the stack)
82 // shall be counted as a primary particle
83 //
04a7657f 84 // This function or a equivalent should be available in some common place of AliRoot
85 //
86
87 // if the particle has a daughter primary, we do not want to count it
88 if (aParticle->GetFirstDaughter() != -1 && aParticle->GetFirstDaughter() < aTotalPrimaries)
89 {
7584d357 90 if (adebug)
25db2d85 91 printf("Dropping particle because it has a daughter among the primaries.\n");
04a7657f 92 return kFALSE;
93 }
94
95 Int_t pdgCode = TMath::Abs(aParticle->GetPdgCode());
96
97 // skip quarks and gluon
98 if (pdgCode <= 10 || pdgCode == 21)
99 {
7584d357 100 if (adebug)
25db2d85 101 printf("Dropping particle because it is a quark or gluon.\n");
04a7657f 102 return kFALSE;
103 }
104
105 if (strcmp(aParticle->GetName(),"XXX") == 0)
106 {
7584d357 107 if (adebug)
25db2d85 108 printf("WARNING: There is a particle named XXX.\n");
04a7657f 109 return kFALSE;
110 }
111
112 TParticlePDG* pdgPart = aParticle->GetPDG();
113
114 if (strcmp(pdgPart->ParticleClass(),"Unknown") == 0)
115 {
7584d357 116 if (adebug)
25db2d85 117 printf("WARNING: There is a particle with an unknown particle class (pdg code %d).\n", pdgCode);
04a7657f 118 return kFALSE;
119 }
120
121 if (pdgPart->Charge() == 0)
122 {
7584d357 123 if (adebug)
25db2d85 124 printf("Dropping particle because it is not charged.\n");
04a7657f 125 return kFALSE;
126 }
127
128 return kTRUE;
129}
847489f7 130
131//____________________________________________________________________
29771dc8 132void AliPWG0Helper::CreateProjections(TH3* hist, Bool_t save)
847489f7 133{
134 // create projections of 3d hists to all 2d combinations
135 // the histograms are not returned, just use them from memory or use this to create them in a file
136
137 TH1* proj = hist->Project3D("yx");
138 proj->SetXTitle(hist->GetXaxis()->GetTitle());
139 proj->SetYTitle(hist->GetYaxis()->GetTitle());
29771dc8 140 if (save)
141 proj->Write();
847489f7 142
143 proj = hist->Project3D("zx");
144 proj->SetXTitle(hist->GetXaxis()->GetTitle());
145 proj->SetYTitle(hist->GetZaxis()->GetTitle());
29771dc8 146 if (save)
147 proj->Write();
847489f7 148
149 proj = hist->Project3D("zy");
150 proj->SetXTitle(hist->GetYaxis()->GetTitle());
151 proj->SetYTitle(hist->GetZaxis()->GetTitle());
29771dc8 152 if (save)
153 proj->Write();
847489f7 154}
1afae8ff 155
156//____________________________________________________________________
29771dc8 157void AliPWG0Helper::CreateDividedProjections(TH3* hist, TH3* hist2, const char* axis, Bool_t putErrors, Bool_t save)
1afae8ff 158{
159 // create projections of the 3d hists divides them
160 // axis decides to which plane, if axis is 0 to all planes
161 // the histograms are not returned, just use them from memory or use this to create them in a file
162
163 if (axis == 0)
164 {
29771dc8 165 CreateDividedProjections(hist, hist2, "yx", putErrors, save);
166 CreateDividedProjections(hist, hist2, "zx", putErrors, save);
167 CreateDividedProjections(hist, hist2, "zy", putErrors, save);
1afae8ff 168
169 return;
170 }
171
172 TH1* proj = hist->Project3D(axis);
0ab29cfa 173
174 if (strlen(axis) == 2)
175 {
176 proj->SetYTitle(GetAxisTitle(hist, axis[0]));
177 proj->SetXTitle(GetAxisTitle(hist, axis[1]));
178 }
179 else if (strlen(axis) == 1)
180 proj->SetXTitle(GetAxisTitle(hist, axis[0]));
1afae8ff 181
182 TH1* proj2 = hist2->Project3D(axis);
0ab29cfa 183 if (strlen(axis) == 2)
184 {
185 proj2->SetYTitle(GetAxisTitle(hist2, axis[0]));
186 proj2->SetXTitle(GetAxisTitle(hist2, axis[1]));
187 }
188 else if (strlen(axis) == 1)
189 proj2->SetXTitle(GetAxisTitle(hist2, axis[0]));
1afae8ff 190
191 TH1* division = dynamic_cast<TH1*> (proj->Clone(Form("%s_div_%s", proj->GetName(), proj2->GetName())));
29771dc8 192 //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()));
193 //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 194 division->Divide(proj, proj2, 1, 1, "B");
29771dc8 195 division->SetTitle(Form("%s divided %s", proj->GetTitle(), proj2->GetTitle()));
0ab29cfa 196
197 if (putErrors)
198 {
199 division->Sumw2();
200 if (division->GetDimension() == 1)
201 {
202 Int_t nBins = division->GetNbinsX();
29771dc8 203 for (Int_t i = 1; i <= nBins; ++i)
0ab29cfa 204 if (proj2->GetBinContent(i) != 0)
205 division->SetBinError(i, TMath::Sqrt(proj->GetBinContent(i)) / proj2->GetBinContent(i));
206 }
207 else if (division->GetDimension() == 2)
208 {
209 Int_t nBinsX = division->GetNbinsX();
210 Int_t nBinsY = division->GetNbinsY();
29771dc8 211 for (Int_t i = 1; i <= nBinsX; ++i)
212 for (Int_t j = 1; j <= nBinsY; ++j)
0ab29cfa 213 if (proj2->GetBinContent(i, j) != 0)
214 division->SetBinError(i, j, TMath::Sqrt(proj->GetBinContent(i, j)) / proj2->GetBinContent(i, j));
215 }
216 }
29771dc8 217
218 if (save)
219 {
220 proj->Write();
221 proj2->Write();
222 division->Write();
223 }
1afae8ff 224}
225
92d2d8ad 226//____________________________________________________________________
25db2d85 227const char* AliPWG0Helper::GetAxisTitle(TH3* hist, const char axis)
92d2d8ad 228{
229 // returns the title of the axis given in axis (x, y, z)
230
231 if (axis == 'x')
232 return hist->GetXaxis()->GetTitle();
233 else if (axis == 'y')
234 return hist->GetYaxis()->GetTitle();
235 else if (axis == 'z')
236 return hist->GetZaxis()->GetTitle();
237
238 return 0;
239}