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d810d0de | 1 | // $Id$ |
2 | // Main authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007 | |
3 | ||
4 | /************************************************************************** | |
5 | * Copyright(c) 1998-2008, ALICE Experiment at CERN, all rights reserved. * | |
6 | * See http://aliceinfo.cern.ch/Offline/AliRoot/License.html for * | |
51346b82 | 7 | * full copyright notice. * |
d810d0de | 8 | **************************************************************************/ |
cb4245bb | 9 | |
c46fd838 | 10 | // To use when per-line id is supported |
cb4245bb | 11 | |
c46fd838 | 12 | class TrackletId : public TObject |
13 | { | |
14 | public: | |
15 | // label, phi, theta | |
16 | // virtual void Print(const Option_t* opt="") {} | |
17 | }; | |
18 | ||
84aff7a4 | 19 | TEveStraightLineSet* esd_spd_tracklets(Float_t rad=8) |
c46fd838 | 20 | { |
d810d0de | 21 | AliESDEvent * esd = AliEveEventManager::AssertESD(); |
d80678e8 | 22 | AliESDVertex * pv = esd->GetPrimaryVertexSPD(); |
c46fd838 | 23 | AliMultiplicity* mul = esd->GetMultiplicity(); |
24 | ||
25 | Double_t pvx[3], pve[3]; | |
26 | pv->GetXYZ(pvx); | |
27 | pv->GetSigmaXYZ(pve); | |
28 | ||
4a74a340 | 29 | TEveStraightLineSet* ls = new TEveStraightLineSet("SPD tracklets"); |
c46fd838 | 30 | |
31 | for (Int_t i=0; i<mul->GetNumberOfTracklets(); ++i) | |
32 | { | |
33 | using namespace TMath; | |
34 | Float_t dr[3]; | |
4a74a340 | 35 | Float_t phi = mul->GetPhi(i); |
723492dc | 36 | dr[0] = rad*Cos(phi); |
37 | dr[1] = rad*Sin(phi); | |
c46fd838 | 38 | dr[2] = rad/Tan(mul->GetTheta(i)); |
39 | ls->AddLine(pvx[0], pvx[1], pvx[2], | |
40 | pvx[0]+dr[0], pvx[1]+dr[1], pvx[2]+dr[2]); | |
41 | } | |
42 | ||
84aff7a4 | 43 | gEve->AddElement(ls); |
44 | gEve->Redraw3D(); | |
c46fd838 | 45 | |
46 | return ls; | |
47 | } |