From bd38690aec44177d0c8fe80024b0ea8bf98389cc Mon Sep 17 00:00:00 2001
From: mtadel <mtadel@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Fri, 24 Oct 2008 16:28:40 +0000
Subject: [PATCH] From Andrea - new macro for visualization of heavy-flavour
 decays.

---
 EVE/alice-macros/aod_HF.C | 150 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 EVE/alice-macros/aod_HF.C

diff --git a/EVE/alice-macros/aod_HF.C b/EVE/alice-macros/aod_HF.C
new file mode 100644
index 00000000000..38e30e74203
--- /dev/null
+++ b/EVE/alice-macros/aod_HF.C
@@ -0,0 +1,150 @@
+// $Id: esd_V0.C 26897 2008-06-25 23:58:36Z mtadel $
+// Main authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007
+
+/**************************************************************************
+ * Copyright(c) 1998-2008, ALICE Experiment at CERN, all rights reserved. *
+ * See http://aliceinfo.cern.ch/Offline/AliRoot/License.html for          *
+ * full copyright notice.                                                 *
+ **************************************************************************/
+
+void esd_v0_init_rectrack(TEveRecTrack& rt, AliExternalTrackParam* tp)
+{
+  Double_t      pbuf[3], vbuf[3];
+
+  rt.fSign = tp->GetSign();
+  tp->GetXYZ(vbuf);     rt.fV.Set(vbuf);
+  tp->GetPxPyPz(pbuf);  rt.fP.Set(pbuf);
+  // Double_t ep = at->GetP(), mc = at->GetMass();
+  rt.fBeta = 1; // ep/TMath::Sqrt(ep*ep + mc*mc);
+}
+
+AliEveV0* aod_make_HF(TEveTrackPropagator* rnrStyle, AliESDVertex* primVtx,
+		      AliESDtrack* neg, AliESDtrack* pos, AliAODRecoDecayHF* rd, Int_t i)
+{
+  TEveRecTrack  rcPos;
+  TEveRecTrack  rcNeg;
+  TEveRecV0     rcV0;
+
+  Double_t p[3];
+  p[0]=rd->PxProng(0);  p[1]=rd->PyProng(0);  p[2]=rd->PzProng(0);
+  rcV0.fPPos.Set(p);
+  p[0]=rd->PxProng(1);  p[1]=rd->PyProng(1);  p[2]=rd->PzProng(1);
+  rcV0.fPNeg.Set(p);
+
+  p[0]=rd->Px();  p[1]=rd->Py();  p[2]=rd->Pz();
+
+  Double_t v[3] = {rd->Xv(),rd->Yv(),rd->Zv()}
+  printf("vertex %f %f %f\n",v[0],v[1],v[2]);
+  rcV0.fVCa.Set(v);
+
+  neg->GetXYZ(v);  rcV0.fVNeg.Set(v);
+  pos->GetXYZ(v);  rcV0.fVPos.Set(v);
+
+  rcV0.fV0Birth.Set(primVtx->GetXv(), primVtx->GetYv(), primVtx->GetZv());
+
+  // Simulation data not directly available in AliESDv0
+  //rcV0.fDLabel[0] = v0->GetNindex();
+  //rcV0.fDLabel[1] = v0->GetPindex();
+
+  esd_v0_init_rectrack(rcNeg, neg);
+  //rcNeg.fIndex = v0->GetNindex();
+  esd_v0_init_rectrack(rcPos, pos);
+  //rcPos.fIndex = v0->GetPindex();
+
+  AliEveV0* myD0 = new AliEveV0(&rcNeg, &rcPos, &rcV0, rnrStyle);
+  myD0->SetElementName(Form("D0->Kpi %d", i));
+  myD0->SetElementTitle(Form("CosPointingAngle %f",
+                             rd->CosPointingAngle()));
+  //myV0->SetESDIndex(i);
+  //myV0->SetOnFlyStatus(v0->GetOnFlyStatus());
+  //myV0->SetDaughterDCA(v0->GetDcaV0Daughters());
+
+  return myD0;
+}
+
+
+AliEveV0List* aod_HF()
+{
+  AliAODEvent* aod = AliEveEventManager::AssertAOD();
+  AliESDEvent* esd = AliEveEventManager::AssertESD();
+
+  AliESDVertex* primVertex = (AliESDVertex*) esd->GetPrimaryVertex();
+
+  AliEveV0List* cont = new AliEveV0List("AOD HF vertices");
+  cont->SetMainColor(2);
+  TEveTrackPropagator* rnrStyle = cont->GetPropagator();
+  rnrStyle->SetMagField( 0.1*aod->GetMagneticField() );
+
+  gEve->AddElement(cont);
+
+
+  TEvePointSet* pointsD0toKpi = new TEvePointSet("D0->Kpi vertex locations");
+
+  // load D0->Kpi candidates
+  TClonesArray *arrayD0toKpi = 
+    (TClonesArray*)aod->GetList()->FindObject("D0toKpi"); 
+     
+  // load 3prong candidates
+  TClonesArray *array3Prong = 
+    (TClonesArray*)aod->GetList()->FindObject("Charm3Prong"); 
+
+
+  Int_t countD0 = 0;
+  for (Int_t iD0toKpi=0; iD0toKpi<arrayD0toKpi->GetEntriesFast(); iD0toKpi++) {
+    AliAODRecoDecayHF2Prong *rd = (AliAODRecoDecayHF2Prong*)arrayD0toKpi->UncheckedAt(iD0toKpi);
+    Bool_t unsetvtx=kFALSE;
+    if(!rd->GetOwnPrimaryVtx()) {
+      rd->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
+      unsetvtx=kTRUE;
+    }
+
+    AliESDtrack* negTr = esd->GetTrack(rd->GetProngID(0));
+    AliESDtrack* posTr = esd->GetTrack(rd->GetProngID(1));
+
+    AliVVertex *secv = rd->GetSecondaryVtx();
+    negTr->PropagateToDCA((AliESDVertex*)secv,aod->GetMagneticField(),100.);
+    posTr->PropagateToDCA((AliESDVertex*)secv,aod->GetMagneticField(),100.);
+
+    AliEveV0* myD0 = aod_make_HF(rnrStyle,primVertex,negTr,posTr,rd,iD0toKpi);
+    if (myD0) {
+      gEve->AddElement(myD0,cont);
+      countD0++;
+    }
+
+    pointsD0toKpi->SetNextPoint(rd->Xv(),rd->Yv(),rd->Zv());
+    pointsD0toKpi->SetPointId(rd);
+
+    if(unsetvtx) rd->UnsetOwnPrimaryVtx();
+  }
+
+  cont->SetTitle("test");
+
+  cont->MakeV0s();
+  gEve->Redraw3D();
+
+  pointsD0toKpi->SetTitle(Form("N=%d",pointsD0toKpi->Size()));
+  pointsD0toKpi->SetMarkerStyle(4);
+  pointsD0toKpi->SetMarkerSize(1.5);
+  pointsD0toKpi->SetMarkerColor(kViolet);
+
+  gEve->AddElement(pointsD0toKpi);
+  gEve->Redraw3D();
+
+  return cont;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-- 
2.39.3