Compilation on Windows/Cygwin
[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>
dd367a14 8#include <TH2.h>
25db2d85 9#include <TH3.h>
116083b1 10#include <TList.h>
9cd015f7 11#include <TTree.h>
12#include <TBranch.h>
13#include <TLeaf.h>
116083b1 14
15#include <AliHeader.h>
16#include <AliStack.h>
17#include <AliLog.h>
04a7657f 18
19#include <AliLog.h>
20#include <AliESD.h>
770a1f1d 21#include <AliESDEvent.h>
04a7657f 22#include <AliESDVertex.h>
23
116083b1 24#include <AliGenEventHeader.h>
25#include <AliGenPythiaEventHeader.h>
26#include <AliGenCocktailEventHeader.h>
27
04a7657f 28//____________________________________________________________________
29ClassImp(AliPWG0Helper)
30
31//____________________________________________________________________
116083b1 32Bool_t AliPWG0Helper::IsEventTriggered(const AliESD* aEsd, Trigger trigger)
33{
34 // see function with ULong64_t argument
35
36 ULong64_t triggerMask = aEsd->GetTriggerMask();
37 return IsEventTriggered(triggerMask, trigger);
38}
39
40//____________________________________________________________________
41Bool_t AliPWG0Helper::IsEventTriggered(ULong64_t triggerMask, Trigger trigger)
04a7657f 42{
43 // check if the event was triggered
44 //
5c495d37 45 // this function needs the branch fTriggerMask
dd367a14 46
47
48 // definitions from p-p.cfg
49 ULong64_t spdFO = (1 << 14);
50 ULong64_t v0left = (1 << 11);
51 ULong64_t v0right = (1 << 12);
04a7657f 52
e9c3977b 53 switch (trigger)
54 {
55 case kMB1:
56 {
dd367a14 57 if (triggerMask & spdFO || ((triggerMask & v0left) || (triggerMask & v0right)))
e9c3977b 58 return kTRUE;
59 break;
60 }
61 case kMB2:
62 {
dd367a14 63 if (triggerMask & spdFO && ((triggerMask & v0left) || (triggerMask & v0right)))
e9c3977b 64 return kTRUE;
65 break;
66 }
67 }
04a7657f 68
69 return kFALSE;
70}
71
72//____________________________________________________________________
116083b1 73Bool_t AliPWG0Helper::IsVertexReconstructed(const AliESD* aEsd)
74{
75 // see function with AliESDVertex argument
76
77 const AliESDVertex* vtxESD = aEsd->GetVertex();
78 return IsVertexReconstructed(vtxESD);
79}
80
81//____________________________________________________________________
82Bool_t AliPWG0Helper::IsVertexReconstructed(const AliESDVertex* vtxESD)
04a7657f 83{
84 // checks if the vertex is reasonable
5c495d37 85 //
86 // this function needs the branches fSPDVertex*
87
116083b1 88 if (!vtxESD)
89 return kFALSE;
04a7657f 90
91 // the vertex should be reconstructed
92 if (strcmp(vtxESD->GetName(), "default")==0)
93 return kFALSE;
94
dd367a14 95 // check Ncontributors
96 if (vtxESD->GetNContributors() <= 0)
97 return kFALSE;
98
04a7657f 99 Double_t vtx_res[3];
100 vtx_res[0] = vtxESD->GetXRes();
101 vtx_res[1] = vtxESD->GetYRes();
102 vtx_res[2] = vtxESD->GetZRes();
103
104 if (vtx_res[2]==0 || vtx_res[2]>0.1)
105 return kFALSE;
106
107 return kTRUE;
108}
109
110//____________________________________________________________________
ebf31fda 111const AliESDVertex* AliPWG0Helper::GetVertex(const AliESDEvent* aEsd, AnalysisMode analysisMode, Bool_t debug)
770a1f1d 112{
113 // Get the vertex from the ESD and returns it if the vertex is valid
114 //
115 // Second argument decides which vertex is used (this selects
116 // also the quality criteria that are applied)
117
118 const AliESDVertex* vertex = 0;
119 Float_t requiredZResolution = -1;
120 if (analysisMode == kSPD || analysisMode == kTPCITS)
121 {
122 vertex = aEsd->GetVertex();
123 requiredZResolution = 0.1;
ebf31fda 124 if (debug)
125 Printf("AliPWG0Helper::GetVertex: Returning SPD vertex");
770a1f1d 126 }
127 else if (analysisMode == kTPC)
128 {
129 vertex = aEsd->GetPrimaryVertex();
130 requiredZResolution = 0.6;
ebf31fda 131 if (debug)
132 Printf("AliPWG0Helper::GetVertex: Returning vertex from tracks");
770a1f1d 133 }
134 else
135 Printf("AliPWG0Helper::GetVertex: ERROR: Invalid second argument %d", analysisMode);
136
ebf31fda 137 if (!vertex) {
138 if (debug)
139 Printf("AliPWG0Helper::GetVertex: No vertex found in ESD");
770a1f1d 140 return 0;
ebf31fda 141 }
770a1f1d 142
143 // check Ncontributors
ebf31fda 144 if (vertex->GetNContributors() <= 0) {
145 if (debug)
146 Printf("AliPWG0Helper::GetVertex: NContributors() <= 0");
770a1f1d 147 return 0;
ebf31fda 148 }
770a1f1d 149
150 // check resolution
151 Double_t zRes = vertex->GetZRes();
152
ebf31fda 153 if (zRes == 0 || zRes > requiredZResolution) {
154 if (debug)
155 Printf("AliPWG0Helper::GetVertex: Resolution too poor %f (required: %f", zRes, requiredZResolution);
770a1f1d 156 return 0;
ebf31fda 157 }
158
159 if (debug)
160 Printf("AliPWG0Helper::GetVertex: Returning valid vertex");
770a1f1d 161
162 return vertex;
163}
164
165//____________________________________________________________________
7584d357 166Bool_t AliPWG0Helper::IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t adebug)
04a7657f 167{
168 //
25db2d85 169 // this function checks if a particle from the event generator (i.e. among the nPrim particles in the stack)
170 // shall be counted as a primary particle
171 //
04a7657f 172 // This function or a equivalent should be available in some common place of AliRoot
173 //
dd367a14 174 // WARNING: Call this function only for particles that are among the particles from the event generator!
175 // --> stack->Particle(id) with id < stack->GetNprimary()
04a7657f 176
177 // if the particle has a daughter primary, we do not want to count it
178 if (aParticle->GetFirstDaughter() != -1 && aParticle->GetFirstDaughter() < aTotalPrimaries)
179 {
7584d357 180 if (adebug)
25db2d85 181 printf("Dropping particle because it has a daughter among the primaries.\n");
04a7657f 182 return kFALSE;
183 }
184
185 Int_t pdgCode = TMath::Abs(aParticle->GetPdgCode());
186
187 // skip quarks and gluon
188 if (pdgCode <= 10 || pdgCode == 21)
189 {
7584d357 190 if (adebug)
25db2d85 191 printf("Dropping particle because it is a quark or gluon.\n");
04a7657f 192 return kFALSE;
193 }
194
195 if (strcmp(aParticle->GetName(),"XXX") == 0)
196 {
7584d357 197 if (adebug)
25db2d85 198 printf("WARNING: There is a particle named XXX.\n");
04a7657f 199 return kFALSE;
200 }
201
202 TParticlePDG* pdgPart = aParticle->GetPDG();
203
204 if (strcmp(pdgPart->ParticleClass(),"Unknown") == 0)
205 {
7584d357 206 if (adebug)
25db2d85 207 printf("WARNING: There is a particle with an unknown particle class (pdg code %d).\n", pdgCode);
04a7657f 208 return kFALSE;
209 }
210
211 if (pdgPart->Charge() == 0)
212 {
7584d357 213 if (adebug)
25db2d85 214 printf("Dropping particle because it is not charged.\n");
04a7657f 215 return kFALSE;
216 }
217
218 return kTRUE;
219}
847489f7 220
221//____________________________________________________________________
29771dc8 222void AliPWG0Helper::CreateProjections(TH3* hist, Bool_t save)
847489f7 223{
224 // create projections of 3d hists to all 2d combinations
225 // the histograms are not returned, just use them from memory or use this to create them in a file
226
227 TH1* proj = hist->Project3D("yx");
228 proj->SetXTitle(hist->GetXaxis()->GetTitle());
229 proj->SetYTitle(hist->GetYaxis()->GetTitle());
29771dc8 230 if (save)
231 proj->Write();
847489f7 232
233 proj = hist->Project3D("zx");
234 proj->SetXTitle(hist->GetXaxis()->GetTitle());
235 proj->SetYTitle(hist->GetZaxis()->GetTitle());
29771dc8 236 if (save)
237 proj->Write();
847489f7 238
239 proj = hist->Project3D("zy");
240 proj->SetXTitle(hist->GetYaxis()->GetTitle());
241 proj->SetYTitle(hist->GetZaxis()->GetTitle());
29771dc8 242 if (save)
243 proj->Write();
847489f7 244}
1afae8ff 245
246//____________________________________________________________________
29771dc8 247void AliPWG0Helper::CreateDividedProjections(TH3* hist, TH3* hist2, const char* axis, Bool_t putErrors, Bool_t save)
1afae8ff 248{
249 // create projections of the 3d hists divides them
250 // axis decides to which plane, if axis is 0 to all planes
251 // the histograms are not returned, just use them from memory or use this to create them in a file
252
253 if (axis == 0)
254 {
29771dc8 255 CreateDividedProjections(hist, hist2, "yx", putErrors, save);
256 CreateDividedProjections(hist, hist2, "zx", putErrors, save);
257 CreateDividedProjections(hist, hist2, "zy", putErrors, save);
1afae8ff 258
259 return;
260 }
261
262 TH1* proj = hist->Project3D(axis);
0ab29cfa 263
264 if (strlen(axis) == 2)
265 {
266 proj->SetYTitle(GetAxisTitle(hist, axis[0]));
267 proj->SetXTitle(GetAxisTitle(hist, axis[1]));
268 }
269 else if (strlen(axis) == 1)
270 proj->SetXTitle(GetAxisTitle(hist, axis[0]));
1afae8ff 271
272 TH1* proj2 = hist2->Project3D(axis);
0ab29cfa 273 if (strlen(axis) == 2)
274 {
275 proj2->SetYTitle(GetAxisTitle(hist2, axis[0]));
276 proj2->SetXTitle(GetAxisTitle(hist2, axis[1]));
277 }
278 else if (strlen(axis) == 1)
279 proj2->SetXTitle(GetAxisTitle(hist2, axis[0]));
1afae8ff 280
281 TH1* division = dynamic_cast<TH1*> (proj->Clone(Form("%s_div_%s", proj->GetName(), proj2->GetName())));
29771dc8 282 //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()));
283 //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 284 division->Divide(proj, proj2, 1, 1, "B");
29771dc8 285 division->SetTitle(Form("%s divided %s", proj->GetTitle(), proj2->GetTitle()));
0ab29cfa 286
287 if (putErrors)
288 {
289 division->Sumw2();
290 if (division->GetDimension() == 1)
291 {
292 Int_t nBins = division->GetNbinsX();
29771dc8 293 for (Int_t i = 1; i <= nBins; ++i)
0ab29cfa 294 if (proj2->GetBinContent(i) != 0)
295 division->SetBinError(i, TMath::Sqrt(proj->GetBinContent(i)) / proj2->GetBinContent(i));
296 }
297 else if (division->GetDimension() == 2)
298 {
299 Int_t nBinsX = division->GetNbinsX();
300 Int_t nBinsY = division->GetNbinsY();
29771dc8 301 for (Int_t i = 1; i <= nBinsX; ++i)
302 for (Int_t j = 1; j <= nBinsY; ++j)
0ab29cfa 303 if (proj2->GetBinContent(i, j) != 0)
304 division->SetBinError(i, j, TMath::Sqrt(proj->GetBinContent(i, j)) / proj2->GetBinContent(i, j));
305 }
306 }
29771dc8 307
308 if (save)
309 {
310 proj->Write();
311 proj2->Write();
312 division->Write();
313 }
1afae8ff 314}
315
92d2d8ad 316//____________________________________________________________________
25db2d85 317const char* AliPWG0Helper::GetAxisTitle(TH3* hist, const char axis)
92d2d8ad 318{
319 // returns the title of the axis given in axis (x, y, z)
320
321 if (axis == 'x')
322 return hist->GetXaxis()->GetTitle();
323 else if (axis == 'y')
324 return hist->GetYaxis()->GetTitle();
325 else if (axis == 'z')
326 return hist->GetZaxis()->GetTitle();
327
328 return 0;
329}
116083b1 330
331//____________________________________________________________________
332Int_t AliPWG0Helper::GetPythiaEventProcessType(AliHeader* aHeader, Bool_t adebug) {
333 //
334 // get the process type of the event.
335 //
336
337 // can only read pythia headers, either directly or from cocktalil header
338 AliGenPythiaEventHeader* pythiaGenHeader = dynamic_cast<AliGenPythiaEventHeader*>(aHeader->GenEventHeader());
339
340 if (!pythiaGenHeader) {
341
342 AliGenCocktailEventHeader* genCocktailHeader = dynamic_cast<AliGenCocktailEventHeader*>(aHeader->GenEventHeader());
343 if (!genCocktailHeader) {
344 printf("AliPWG0Helper::GetProcessType : Unknown header type (not Pythia or Cocktail). \n");
345 return -1;
346 }
347
348 TList* headerList = genCocktailHeader->GetHeaders();
349 if (!headerList) {
350 return -1;
351 }
352
353 for (Int_t i=0; i<headerList->GetEntries(); i++) {
354 pythiaGenHeader = dynamic_cast<AliGenPythiaEventHeader*>(headerList->At(i));
355 if (pythiaGenHeader)
356 break;
357 }
358
359 if (!pythiaGenHeader) {
360 printf("AliPWG0Helper::GetProcessType : Could not find Pythia header. \n");
361 return -1;
362 }
363 }
364
365 if (adebug) {
366 printf("AliPWG0Helper::GetProcessType : Pythia process type found: %d \n",pythiaGenHeader->ProcessType());
367 }
368
369 return pythiaGenHeader->ProcessType();
370}
371
372//____________________________________________________________________
373TParticle* AliPWG0Helper::FindPrimaryMother(AliStack* stack, Int_t label)
374{
375 //
376 // Finds the first mother among the primary particles of the particle identified by <label>,
377 // i.e. the primary that "caused" this particle
378 //
379
380 Int_t motherLabel = FindPrimaryMotherLabel(stack, label);
381 if (motherLabel < 0)
382 return 0;
383
384 return stack->Particle(motherLabel);
385}
386
387//____________________________________________________________________
388Int_t AliPWG0Helper::FindPrimaryMotherLabel(AliStack* stack, Int_t label)
389{
390 //
391 // Finds the first mother among the primary particles of the particle identified by <label>,
392 // i.e. the primary that "caused" this particle
393 //
394 // returns its label
395 //
396
397 Int_t nPrim = stack->GetNprimary();
398
399 while (label >= nPrim)
400 {
401 //printf("Particle %d (pdg %d) is not a primary. Let's check its mother %d\n", label, mother->GetPdgCode(), mother->GetMother(0));
402
403 TParticle* particle = stack->Particle(label);
404 if (!particle)
405 {
406 AliDebugGeneral("FindPrimaryMother", AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack.", label));
407 return -1;
408 }
409
410 // find mother
411 if (particle->GetMother(0) < 0)
412 {
413 AliDebugGeneral("FindPrimaryMother", AliLog::kError, Form("UNEXPECTED: Could not find mother of secondary particle %d.", label));
414 return -1;
415 }
416
417 label = particle->GetMother(0);
418 }
419
420 return label;
421}
9cd015f7 422
423void AliPWG0Helper::SetBranchStatusRecursive(TTree* tree, char *bname, Bool_t status, Bool_t debug)
424{
425 // Function to switch on/off all data members of a top level branch
426 // this is needed for branches without a trailing dot ".", for those
427 // the root functionality with regular expressions does not work.
428 // Usage e.g.
429 // chain->SetBranchStatus("*", 0);
430 // SetBranchStatusRecursive(chain,"SPDVertex",1);
431 // You need to give the full name of the top level branch zou want to access
432 //==========================================================================
433 // Author Christian.Klein-Boesing@cern.ch
434
435 if (!tree)
436 return;
437
438 TBranch *br = tree->GetBranch(bname);
439 if(!br) {
440 Printf("AliPWG0Helper::SetBranchStatusRecursive: Branch %s not found", bname);
441 }
442
443 TObjArray *leaves = tree->GetListOfLeaves();
444 Int_t nleaves = leaves->GetEntries();
445 TLeaf *leaf = 0;
446 TBranch *branch = 0;
447 TBranch *mother = 0;
448 for (Int_t i=0;i<nleaves;i++) {
449 // the matched entry e.g. SPDVertex is its own Mother
450 leaf = (TLeaf*)leaves->UncheckedAt(i);
451 branch = (TBranch*)leaf->GetBranch();
452 mother = branch->GetMother();
453 if (mother==br){
454 if (debug)
455 Printf(">>>> AliPWG0Helper::SetBranchStatusRecursive: Setting status %s %s to %d", mother->GetName(), leaf->GetName(), status);
456 if (status) branch->ResetBit(kDoNotProcess);
457 else branch->SetBit(kDoNotProcess);
458 }
459 }
460}
dd367a14 461
462//____________________________________________________________________
463void AliPWG0Helper::NormalizeToBinWidth(TH1* hist)
464{
465 //
466 // normalizes a 1-d histogram to its bin width
467 //
468
469 for (Int_t i=1; i<=hist->GetNbinsX(); ++i)
470 {
471 hist->SetBinContent(i, hist->GetBinContent(i) / hist->GetBinWidth(i));
472 hist->SetBinError(i, hist->GetBinError(i) / hist->GetBinWidth(i));
473 }
474}
475
476//____________________________________________________________________
477void AliPWG0Helper::NormalizeToBinWidth(TH2* hist)
478{
479 //
480 // normalizes a 2-d histogram to its bin width (x width * y width)
481 //
482
483 for (Int_t i=1; i<=hist->GetNbinsX(); ++i)
484 for (Int_t j=1; j<=hist->GetNbinsY(); ++j)
485 {
486 Double_t factor = hist->GetXaxis()->GetBinWidth(i) * hist->GetYaxis()->GetBinWidth(j);
487 hist->SetBinContent(i, j, hist->GetBinContent(i, j) / factor);
488 hist->SetBinError(i, j, hist->GetBinError(i, j) / factor);
489 }
490}