2 // Main authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007
4 /**************************************************************************
5 * Copyright(c) 1998-2008, ALICE Experiment at CERN, all rights reserved. *
6 * See http://aliceinfo.cern.ch/Offline/AliRoot/License.html for *
7 * full copyright notice. *
8 **************************************************************************/
10 void esd_cascade_init_rectrack(TEveRecTrack& rt, AliExternalTrackParam* tp)
12 Double_t pbuf[3], vbuf[3];
14 rt.fSign = tp->GetSign();
15 tp->GetXYZ(vbuf); rt.fV.Set(vbuf);
16 tp->GetPxPyPz(pbuf); rt.fP.Set(pbuf);
17 // Double_t ep = at->GetP(), mc = at->GetMass();
18 rt.fBeta = 1; // ep/TMath::Sqrt(ep*ep + mc*mc);
21 AliEveCascade* esd_make_cascade(TEveTrackPropagator* rnrStyle, AliESDVertex* primVtx,
22 AliESDtrack* bac, AliESDcascade* cascade, Int_t i)
29 TEveRecCascade rcCascade;
31 Double_t pNeg[3], pPos[3], pV0[3];
32 cascade->GetNPxPyPz(pNeg[0], pNeg[1], pNeg[2]);
34 cascade->GetPPxPyPz(pPos[0], pPos[1], pPos[2]);
38 cascade->GetXYZ(v[0], v[1], v[2]);
41 cascade->GetParamN()->GetXYZ(v); rcV0.fVNeg.Set(v);
42 cascade->GetParamP()->GetXYZ(v); rcV0.fVPos.Set(v);
44 rcV0.fV0Birth.Set(primVtx->GetXv(), primVtx->GetYv(), primVtx->GetZv());
46 Double_t pBac[3], pCascade[3], cv[21]={0.};
47 cascade->GetBPxPyPz(pBac[0], pBac[1], pBac[2]);
48 rcCascade.fPBac.Set(pBac);
49 cascade->GetPxPyPz(pCascade[0], pCascade[1], pCascade[2]);
51 cascade->GetXYZcascade(v[0], v[1], v[2]);
52 rcCascade.fCascadeVCa.Set(v);
54 rcCascade.fCascadeBirth.Set(primVtx->GetXv(), primVtx->GetYv(), primVtx->GetZv());
56 // Simulation data not directly available in AliESDcascade
57 // rcCascade.fDLabel = cascade->GetBindex();
59 // Problem: two following lines are not possible: no GetParamB !!
60 // cascade->GetParamB()->GetXYZ(v); rcCascade.fVBac.Set(v);
61 // esd_cascade_init_rectrack(rcBac, cascade->GetParamB());
62 // Solution: create an AliExternalTrackParam with null cv...
63 AliExternalTrackParam *bParam = new AliExternalTrackParam(v,pBac,cv,cascade->Charge());
64 esd_cascade_init_rectrack(rcBac,bParam);
65 rcBac.fIndex = cascade->GetBindex();
67 AliEveCascade* myCascade = new AliEveCascade(&rcBac, &rcV0, &rcCascade, rnrStyle);
68 myCascade->SetElementName(Form("ESDcascade %d", i));
69 myCascade->SetElementTitle(Form("DCA %f",
70 cascade->GetDcaXiDaughters()));
71 myCascade->SetESDIndex(i);
72 myCascade->SetDaughterDCA(cascade->GetDcaXiDaughters());
78 AliEveCascadeList* esd_cascade()
80 AliESDEvent* esd = AliEveEventManager::AssertESD();
82 AliESDVertex* primVertex = (AliESDVertex*) esd->GetPrimaryVertex();
84 AliEveCascadeList* cont = new AliEveCascadeList("ESD cascade");
85 cont->SetMainColor(3); // green
86 TEveTrackPropagator* rnrStyle = cont->GetPropagator();
87 rnrStyle->SetMagField( 0.1*esd->GetMagneticField() );
89 gEve->AddElement(cont);
92 for (Int_t n=0; n<esd->GetNumberOfCascades(); ++n)
94 AliESDcascade *cascade = esd->GetCascade(n);
96 Int_t bacInd = cascade->GetBindex();
97 AliESDtrack* bacTr = esd->GetTrack(bacInd);
99 AliEveCascade* myCascade = esd_make_cascade(rnrStyle, primVertex, bacTr, cascade, n);
102 gEve->AddElement(myCascade, cont);
107 cont->SetTitle("test");
109 cont->MakeCascades();