Coding conventions (Laurent)
[u/mrichter/AliRoot.git] / MUON / AliMUONResponseTriggerV1.cxx
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e087fe7f 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
30178c30 16/* $Id$ */
e087fe7f 17
30178c30 18#include <TMath.h>
19#include <TRandom.h>
e087fe7f 20
21#include "AliMUONResponseTriggerV1.h"
337c9041 22#include "AliMUONGeometrySegmentation.h"
e087fe7f 23
24ClassImp(AliMUONResponseTriggerV1)
25
26//------------------------------------------------------------------
30178c30 27AliMUONResponseTriggerV1::AliMUONResponseTriggerV1()
28 : AliMUONResponseTrigger()
29{
e087fe7f 30// default constructor
31 Float_t hv=9.2;
32 SetParameters(hv);
33}
34
35//------------------------------------------------------------------
30178c30 36AliMUONResponseTriggerV1::AliMUONResponseTriggerV1(Float_t hv)
37 : AliMUONResponseTrigger()
38{
e087fe7f 39// Constructor
40 SetParameters(hv);
41}
42
43//------------------------------------------------------------------
44void AliMUONResponseTriggerV1::SetParameters(Float_t hv){
45// initialize parameters accoring to HV
46// (see V.Barret B.Espagnon and P.Rosnet Alice/note xxx)
47 fA = 6.089 * hv - 52.70;
48 fB = 2.966;
49 fC = 4.3e-4 * hv - 3.5e-3;
50}
51
52//------------------------------------------------------------------
53Int_t AliMUONResponseTriggerV1::SetGenerCluster(){
54// Set the GenerCluster parameter and return 1
55 fGenerCluster = gRandom->Rndm();
56 return 1;
57}
58
59//------------------------------------------------------------------
85fec35d 60Float_t AliMUONResponseTriggerV1::IntXY(Int_t idDE, AliMUONGeometrySegmentation * segmentation) const
61{
337c9041 62// Returns 1 or 0 if the current strip is fired or not
63// get the "parameters" needed to evaluate the strip response
64// x1 : hit x(y) position
65// x2 : x(y) coordinate of the main strip
66// x3 : current strip real x(y) coordinate
67// x4 : dist. between x(y) hit pos. and the closest border of the current strip
68
69 Float_t x1,x2,x3,x4;
70 segmentation->IntegrationLimits(idDE, x1,x2,x3,x4);
71 Float_t theta = 0.; // incident angle to be implemented
72
73 return (fGenerCluster < FireStripProb(x4,theta)) ? 1:0;
74}
e087fe7f 75
76//------------------------------------------------------------------
85fec35d 77Float_t AliMUONResponseTriggerV1::FireStripProb(Float_t x4, Float_t theta)
78const
79{
e087fe7f 80// parametrisation of the probability that a strip neighbour of the main
81// strip is fired (V.Barret B.Espagnon and P.Rosnet Alice/note xxx)
82// WARNING : need to convert x4 from cm to mm
83
84 return
85 (TMath::Cos(theta)*fA/(fA+TMath::Cos(theta)*TMath::Power(x4*10.,fB))+fC)/
86 (TMath::Cos(theta)+fC);
87}
88