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 // Simple particle gun.
19 // Momentum, phi and theta of the partice as well as the particle type can be set.
20 // If fExplicit is true the user set momentum vector is used,
21 // otherwise it is calculated.
22 // andreas.morsch@cern.ch
26 #include "AliGenFixed.h"
31 //_____________________________________________________________________________
32 AliGenFixed::AliGenFixed()
38 // Default constructor
40 for (Int_t i = 0; i < 3; i++) fP[i] = 0.;
44 //_____________________________________________________________________________
45 AliGenFixed::AliGenFixed(Int_t npart)
51 // Standard constructor
54 fTitle="Fixed Particle Generator";
55 for (Int_t i = 0; i < 3; i++) fP[i] = 0.;
58 //_____________________________________________________________________________
59 void AliGenFixed::Generate()
62 // Generate one trigger
64 Float_t polar[3]= {0,0,0};
66 fP[0] = fPMin * TMath::Cos(fPhiMin) * TMath::Sin(fThetaMin);
67 fP[1] = fPMin * TMath::Sin(fPhiMin) * TMath::Sin(fThetaMin);
68 fP[2] = fPMin * TMath::Cos(fThetaMin);
72 Float_t o[3] = {0., 0., 0.};
74 if(fVertexSmear == kPerEvent) {
76 for (j = 0;j < 3; j++) o[j] = fVertex[j];
80 for(i = 0; i < fNpart; i++)
81 PushTrack(fTrackIt, -1, fIpart, fP, o , polar, time, kPPrimary, nt);