Event server (Mihai)
[u/mrichter/AliRoot.git] / STEER / 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
acd84897 16/* $Id$ */
6872c613 17
116cbefd 18//-------------------------------------------------------------------------
116cbefd 19// Lego generator in Phi - Z bins
5d8718b8 20// Uses geantino rays to check the material distributions and detector's
21// geometry
22// Author: A.Morsch
116cbefd 23//-------------------------------------------------------------------------
24
6872c613 25#include "AliLegoGeneratorPhiZ.h"
26#include "AliRun.h"
5d12ce38 27#include "AliMC.h"
21bf7095 28#include "AliLog.h"
6872c613 29
30ClassImp(AliLegoGeneratorPhiZ)
31
32
33//___________________________________________
34void AliLegoGeneratorPhiZ::Generate()
35{
36// Create a geantino with kinematics corresponding to the current bins
37// Here: Coor1 = Z
38// Coor2 = phi.
39
40 //
41 // Rootinos are 0
42 const Int_t kMpart = 0;
43 Float_t orig[3], pmom[3];
44 Float_t t, cosp, sinp;
45 if (fCoor1Bin==-1) fCoor1Bin=fNCoor1;
46 // Prepare for next step
47 if(fCoor1Bin>=fNCoor1-1)
48 if(fCoor2Bin>=fNCoor2-1) {
21bf7095 49 AliWarning("End of Lego Generation");
6872c613 50 return;
51 } else {
52 fCoor2Bin++;
21bf7095 53 AliDebug(1, Form("Generating rays in Phi-bin:%d",fCoor2Bin));
6872c613 54 fCoor1Bin=0;
55 } else fCoor1Bin++;
6872c613 56 fCurCoor1 = (fCoor1Min+(fCoor1Bin+0.5)*(fCoor1Max-fCoor1Min)/fNCoor1);
57 fCurCoor2 = (fCoor2Min+(fCoor2Bin+0.5)*(fCoor2Max-fCoor2Min)/fNCoor2);
58
d55c1573 59 Float_t phi = fCurCoor2*TMath::Pi()/180.;
6872c613 60
61 cosp = TMath::Cos(phi);
62 sinp = TMath::Sin(phi);
63
64 pmom[0] = cosp;
65 pmom[1] = sinp;
66 pmom[2] = 0.;
67
68 // --- Where to start
69 orig[0] = orig[1] = orig[2] = 0;
d55c1573 70 orig[2] = fCurCoor1;
6872c613 71
72 Float_t dalicz = 3000;
73 if (fRadMin > 0) {
74 t = PropagateCylinder(orig,pmom,fRadMin,dalicz);
899c7749 75 orig[0] += pmom[0]*t;
76 orig[1] += pmom[1]*t;
77 orig[2] += pmom[2]*t;
6872c613 78 if (TMath::Abs(orig[2]) > fZMax) return;
79 }
80
81 Float_t polar[3]={0.,0.,0.};
82 Int_t ntr;
5d12ce38 83 gAlice->GetMCApp()->PushTrack(1, -1, kMpart, pmom, orig, polar, 0, kPPrimary, ntr);
6872c613 84
85}