1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 Revision 1.2 2000/11/30 07:12:49 alibrary
19 Introducing new Rndm and QA classes
21 Revision 1.1 2000/10/26 14:18:05 morsch
22 Add new AliLegoGenerator classes:
23 AliLegoGeneratorXYZ: carthesian binning
24 AliLegoGeneratorEta: eta-phi binning
28 #include "AliLegoGeneratorEta.h"
31 ClassImp(AliLegoGeneratorEta)
34 //___________________________________________
35 void AliLegoGeneratorEta::Generate()
37 // Create a geantino with kinematics corresponding to the current bins
43 const Int_t kMpart = 0;
44 Float_t orig[3], pmom[3];
45 Float_t t, cost, sint, cosp, sinp;
46 if (fCoor1Bin==-1) fCoor1Bin=fNCoor1;
47 // Prepare for next step
48 if(fCoor1Bin>=fNCoor1-1)
49 if(fCoor2Bin>=fNCoor2-1) {
50 Warning("Generate","End of Lego Generation");
54 printf("Generating rays in eta bin:%d\n",fCoor2Bin);
58 fCurCoor1 = (fCoor1Min+(fCoor1Bin+0.5)*(fCoor1Max-fCoor1Min)/fNCoor1);
59 fCurCoor2 = (fCoor2Min+(fCoor2Bin+0.5)*(fCoor2Max-fCoor2Min)/fNCoor2);
61 Float_t phi = fCurCoor1*TMath::Pi()/180.;
62 Float_t theta = 2.*TMath::ATan(TMath::Exp(-fCurCoor2));
65 cost = TMath::Cos(theta);
66 sint = TMath::Sin(theta);
67 cosp = TMath::Cos(phi);
68 sinp = TMath::Sin(phi);
75 orig[0] = orig[1] = orig[2] = 0;
76 Float_t dalicz = 3000;
78 t = PropagateCylinder(orig,pmom,fRadMin,dalicz);
82 if (TMath::Abs(orig[2]) > fZMax) return;
85 Float_t polar[3]={0.,0.,0.};
87 gAlice->SetTrack(1, 0, kMpart, pmom, orig, polar, 0, kPPrimary, ntr);