| df725edf |
1 | /************************************************************************** |
| 2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
| 3 | * * |
| 4 | * Author: The ALICE Off-line Project. * |
| 5 | * Contributors are mentioned in the code where appropriate. * |
| 6 | * * |
| 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 | **************************************************************************/ |
| 15 | |
| 16 | /* |
| 17 | $Log$ |
| 18 | */ |
| 19 | |
| 20 | #include "AliGenDoubleScan.h" |
| 21 | #include <stdlib.h> |
| 22 | #include "AliRun.h" |
| 23 | ClassImp(AliGenDoubleScan) |
| 24 | |
| 25 | AliGenDoubleScan::AliGenDoubleScan() |
| 26 | :AliGenScan(-1) |
| 27 | { |
| 28 | } |
| 29 | |
| 30 | AliGenDoubleScan::AliGenDoubleScan(Int_t npart) |
| 31 | :AliGenScan(npart) |
| 32 | { |
| 33 | } |
| 34 | |
| 35 | //____________________________________________________________ |
| 36 | AliGenDoubleScan::~AliGenDoubleScan() |
| 37 | {} |
| 38 | |
| 39 | //____________________________________________________________ |
| 40 | void AliGenDoubleScan::Generate() |
| 41 | { |
| 42 | // |
| 43 | // Generate one trigger |
| 44 | // |
| 45 | |
| 46 | Float_t polar[3]= {0,0,0}; |
| 47 | // |
| 48 | Float_t origin[3]; |
| 49 | Float_t p[3]; |
| 50 | Int_t nt; |
| 51 | Float_t pmom, theta, phi; |
| 52 | // |
| 53 | Float_t random[6]; |
| 54 | Float_t dx,dy,dz; |
| 55 | |
| 56 | // |
| 57 | if (fNy > 0) { |
| 58 | dx=(fXmax-fXmin)/fNx; |
| 59 | } else { |
| 60 | dx=1e10; |
| 61 | } |
| 62 | |
| 63 | if (fNy > 0) { |
| 64 | dy=(fYmax-fYmin)/fNy; |
| 65 | } else { |
| 66 | dy=1e10; |
| 67 | } |
| 68 | |
| 69 | if (fNz > 0) { |
| 70 | dz=(fZmax-fZmin)/fNz; |
| 71 | } else { |
| 72 | dz=1e10; |
| 73 | } |
| 74 | for (Int_t ix=0; ix<fNx; ix++) { |
| 75 | for (Int_t iy=0; iy<fNy; iy++) { |
| 76 | for (Int_t iz=0; iz<fNz; iz++){ |
| 77 | gMC->Rndm(random,6); |
| 78 | origin[0]=fXmin+ix*dx+2*(random[0]-0.5)*fOsigma[0]; |
| 79 | origin[1]=fYmin+iy*dy+2*(random[1]-0.5)*fOsigma[1]; |
| 80 | origin[2]=fZmin+iz*dz+2*(random[2]-0.5)*fOsigma[2]; |
| 81 | pmom=fPMin+random[3]*(fPMax-fPMin); |
| 82 | theta=fThetaMin+random[4]*(fThetaMax-fThetaMin); |
| 83 | phi=fPhiMin+random[5]*(fPhiMax-fPhiMin); |
| 84 | p[0] = pmom*TMath::Cos(phi)*TMath::Sin(theta); |
| 85 | p[1] = pmom*TMath::Sin(phi)*TMath::Sin(theta); |
| 86 | p[2] = pmom*TMath::Cos(theta); |
| 87 | gAlice->SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,"Primary",nt); |
| 88 | // |
| 89 | // Generate 2nd particle at distance fDistance from the first |
| 90 | // |
| 91 | gMC->Rndm(random,6); |
| 92 | Float_t phi2=2.*TMath::Pi()*random[0]; |
| 93 | Float_t dx =fDistance*TMath::Sin(phi2); |
| 94 | Float_t dy =fDistance*TMath::Cos(phi2); |
| 95 | origin[0]=origin[0]+dx; |
| 96 | origin[1]=origin[1]+dy; |
| 97 | pmom=fPMin+random[1]*(fPMax-fPMin); |
| 98 | theta=fThetaMin+random[2]*(fThetaMax-fThetaMin); |
| 99 | phi=fPhiMin+random[3]*(fPhiMax-fPhiMin); |
| 100 | p[0] = pmom*TMath::Cos(phi)*TMath::Sin(theta); |
| 101 | p[1] = pmom*TMath::Sin(phi)*TMath::Sin(theta); |
| 102 | p[2] = pmom*TMath::Cos(theta); |
| 103 | gAlice->SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,"Primary",nt); |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | |
| 110 | |
| 111 | |
| 112 | |
| 113 | |
| 114 | |
| 115 | |
| 116 | |
| 117 | |
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| 120 | |
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