Introducing Header instead of Log
[u/mrichter/AliRoot.git] / STEER / AliLegoGeneratorPhiZ.cxx
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6872c613 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
fb17acd4 16/* $Header$ */
6872c613 17
18#include "AliLegoGeneratorPhiZ.h"
19#include "AliRun.h"
20
21ClassImp(AliLegoGeneratorPhiZ)
22
23
24//___________________________________________
25void AliLegoGeneratorPhiZ::Generate()
26{
27// Create a geantino with kinematics corresponding to the current bins
28// Here: Coor1 = Z
29// Coor2 = phi.
30
31 //
32 // Rootinos are 0
33 const Int_t kMpart = 0;
34 Float_t orig[3], pmom[3];
35 Float_t t, cosp, sinp;
36 if (fCoor1Bin==-1) fCoor1Bin=fNCoor1;
37 // Prepare for next step
38 if(fCoor1Bin>=fNCoor1-1)
39 if(fCoor2Bin>=fNCoor2-1) {
40 Warning("Generate","End of Lego Generation");
41 return;
42 } else {
43 fCoor2Bin++;
39974533 44 printf("Generating rays in Phi-bin:%d\n",fCoor2Bin);
6872c613 45 fCoor1Bin=0;
46 } else fCoor1Bin++;
6872c613 47 fCurCoor1 = (fCoor1Min+(fCoor1Bin+0.5)*(fCoor1Max-fCoor1Min)/fNCoor1);
48 fCurCoor2 = (fCoor2Min+(fCoor2Bin+0.5)*(fCoor2Max-fCoor2Min)/fNCoor2);
49
d55c1573 50 Float_t phi = fCurCoor2*TMath::Pi()/180.;
6872c613 51
52 cosp = TMath::Cos(phi);
53 sinp = TMath::Sin(phi);
54
55 pmom[0] = cosp;
56 pmom[1] = sinp;
57 pmom[2] = 0.;
58
59 // --- Where to start
60 orig[0] = orig[1] = orig[2] = 0;
d55c1573 61 orig[2] = fCurCoor1;
6872c613 62
63 Float_t dalicz = 3000;
64 if (fRadMin > 0) {
65 t = PropagateCylinder(orig,pmom,fRadMin,dalicz);
899c7749 66 orig[0] += pmom[0]*t;
67 orig[1] += pmom[1]*t;
68 orig[2] += pmom[2]*t;
6872c613 69 if (TMath::Abs(orig[2]) > fZMax) return;
70 }
71
72 Float_t polar[3]={0.,0.,0.};
73 Int_t ntr;
9e1a0ddb 74 gAlice->SetTrack(1, -1, kMpart, pmom, orig, polar, 0, kPPrimary, ntr);
6872c613 75
76}