3 #include <AliPWG0Helper.h>
6 #include <TParticlePDG.h>
12 #include <AliESDVertex.h>
14 //____________________________________________________________________
15 ClassImp(AliPWG0Helper)
17 //____________________________________________________________________
18 Bool_t AliPWG0Helper::IsEventTriggered(AliESD* aEsd, Trigger trigger)
20 // check if the event was triggered
22 // this function needs the branch fTriggerMask
25 // ITS_SPD_GFO_L0 : 32
29 ULong64_t triggerMask = aEsd->GetTriggerMask();
35 if (triggerMask&32 || ((triggerMask&1) || (triggerMask&2)))
41 if (triggerMask&32 && ((triggerMask&1) || (triggerMask&2)))
50 //____________________________________________________________________
51 Bool_t AliPWG0Helper::IsVertexReconstructed(AliESD* aEsd)
53 // checks if the vertex is reasonable
55 // this function needs the branches fSPDVertex*
58 const AliESDVertex* vtxESD = aEsd->GetVertex();
60 // the vertex should be reconstructed
61 if (strcmp(vtxESD->GetName(), "default")==0)
65 vtx_res[0] = vtxESD->GetXRes();
66 vtx_res[1] = vtxESD->GetYRes();
67 vtx_res[2] = vtxESD->GetZRes();
69 if (vtx_res[2]==0 || vtx_res[2]>0.1)
72 // check Ncontributors, if <0 it means error *gna*
77 //____________________________________________________________________
78 Bool_t AliPWG0Helper::IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t adebug)
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
84 // This function or a equivalent should be available in some common place of AliRoot
87 // if the particle has a daughter primary, we do not want to count it
88 if (aParticle->GetFirstDaughter() != -1 && aParticle->GetFirstDaughter() < aTotalPrimaries)
91 printf("Dropping particle because it has a daughter among the primaries.\n");
95 Int_t pdgCode = TMath::Abs(aParticle->GetPdgCode());
97 // skip quarks and gluon
98 if (pdgCode <= 10 || pdgCode == 21)
101 printf("Dropping particle because it is a quark or gluon.\n");
105 if (strcmp(aParticle->GetName(),"XXX") == 0)
108 printf("WARNING: There is a particle named XXX.\n");
112 TParticlePDG* pdgPart = aParticle->GetPDG();
114 if (strcmp(pdgPart->ParticleClass(),"Unknown") == 0)
117 printf("WARNING: There is a particle with an unknown particle class (pdg code %d).\n", pdgCode);
121 if (pdgPart->Charge() == 0)
124 printf("Dropping particle because it is not charged.\n");
131 //____________________________________________________________________
132 void AliPWG0Helper::CreateProjections(TH3* hist, Bool_t save)
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
137 TH1* proj = hist->Project3D("yx");
138 proj->SetXTitle(hist->GetXaxis()->GetTitle());
139 proj->SetYTitle(hist->GetYaxis()->GetTitle());
143 proj = hist->Project3D("zx");
144 proj->SetXTitle(hist->GetXaxis()->GetTitle());
145 proj->SetYTitle(hist->GetZaxis()->GetTitle());
149 proj = hist->Project3D("zy");
150 proj->SetXTitle(hist->GetYaxis()->GetTitle());
151 proj->SetYTitle(hist->GetZaxis()->GetTitle());
156 //____________________________________________________________________
157 void AliPWG0Helper::CreateDividedProjections(TH3* hist, TH3* hist2, const char* axis, Bool_t putErrors, Bool_t save)
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
165 CreateDividedProjections(hist, hist2, "yx", putErrors, save);
166 CreateDividedProjections(hist, hist2, "zx", putErrors, save);
167 CreateDividedProjections(hist, hist2, "zy", putErrors, save);
172 TH1* proj = hist->Project3D(axis);
174 if (strlen(axis) == 2)
176 proj->SetYTitle(GetAxisTitle(hist, axis[0]));
177 proj->SetXTitle(GetAxisTitle(hist, axis[1]));
179 else if (strlen(axis) == 1)
180 proj->SetXTitle(GetAxisTitle(hist, axis[0]));
182 TH1* proj2 = hist2->Project3D(axis);
183 if (strlen(axis) == 2)
185 proj2->SetYTitle(GetAxisTitle(hist2, axis[0]));
186 proj2->SetXTitle(GetAxisTitle(hist2, axis[1]));
188 else if (strlen(axis) == 1)
189 proj2->SetXTitle(GetAxisTitle(hist2, axis[0]));
191 TH1* division = dynamic_cast<TH1*> (proj->Clone(Form("%s_div_%s", proj->GetName(), proj2->GetName())));
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()));
194 division->Divide(proj, proj2, 1, 1, "B");
195 division->SetTitle(Form("%s divided %s", proj->GetTitle(), proj2->GetTitle()));
200 if (division->GetDimension() == 1)
202 Int_t nBins = division->GetNbinsX();
203 for (Int_t i = 1; i <= nBins; ++i)
204 if (proj2->GetBinContent(i) != 0)
205 division->SetBinError(i, TMath::Sqrt(proj->GetBinContent(i)) / proj2->GetBinContent(i));
207 else if (division->GetDimension() == 2)
209 Int_t nBinsX = division->GetNbinsX();
210 Int_t nBinsY = division->GetNbinsY();
211 for (Int_t i = 1; i <= nBinsX; ++i)
212 for (Int_t j = 1; j <= nBinsY; ++j)
213 if (proj2->GetBinContent(i, j) != 0)
214 division->SetBinError(i, j, TMath::Sqrt(proj->GetBinContent(i, j)) / proj2->GetBinContent(i, j));
226 //____________________________________________________________________
227 const char* AliPWG0Helper::GetAxisTitle(TH3* hist, const char axis)
229 // returns the title of the axis given in axis (x, y, z)
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();