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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 /* $Id$ */
17
18 #include "AliMUONChamberTrigger.h"
19 #include "AliMUONSegmentationTrigger.h"
20 #include "AliMUONResponseTrigger.h"
21 #include "AliMUONResponseTriggerV1.h"
22 #include <TObjArray.h>
23 #include <TMath.h>
24 #include <Riostream.h>
25
26 ClassImp(AliMUONChamberTrigger)
27
28 //-------------------------------------------
29
30 AliMUONChamberTrigger::AliMUONChamberTrigger()
31 {
32 // Default constructor
33 }
34
35
36 AliMUONChamberTrigger::AliMUONChamberTrigger(Int_t id) : AliMUONChamber(id)
37 {
38 // Constructor using chamber id
39 }
40
41 //-------------------------------------------
42 void AliMUONChamberTrigger::DisIntegration(Float_t /*eloss*/, Float_t tof, 
43                                            Float_t xhit, Float_t yhit, Float_t zhit, 
44                                            Int_t& nnew,
45                                            Float_t newclust[6][500]) 
46 {
47 //    
48 //  Generates pad hits (simulated cluster) 
49 //  using the segmentation and the response model
50
51   Int_t twentyNano;
52   if (tof<75*TMath::Power(10,-9)) {
53     twentyNano=1;
54   } else {
55     twentyNano=100;
56   }
57
58   Float_t qp;
59   nnew=0;
60   for (Int_t i=1; i<=fnsec; i++) {
61     AliSegmentation * segmentation=
62       (AliSegmentation*) (*fSegmentation)[i-1];
63     
64 // Find the module & strip Id. which has fired
65     Int_t ix,iy;
66     
67     segmentation->GetPadI(xhit,yhit,0,ix,iy);
68     segmentation->SetPad(ix,iy);
69
70 // treatment of GEANT hits w/o corresponding strip (due to the fact that
71 // the 2 geometries are computed in a very slightly different way) 
72     if (ix==0&&iy==0) {
73       printf("AliMUONChamberTrigger hit w/o strip %f %f \n",xhit,yhit);
74     } else {          
75       // --- store signal information for this strip
76       newclust[0][nnew]=1.;                       // total charge
77       newclust[1][nnew]=ix;                       // ix-position of pad
78       newclust[2][nnew]=iy;                       // iy-position of pad
79       newclust[3][nnew]=twentyNano;               // time of flight
80       newclust[4][nnew]=segmentation->ISector();  // sector id
81       newclust[5][nnew]=(Float_t) i;              // counter
82       nnew++;
83
84 // cluster-size if AliMUONResponseTriggerV1, nothing if AliMUONResponseTrigger
85       if (((AliMUONResponseTrigger*) fResponse)->SetGenerCluster()) {
86   
87         // set hits
88         segmentation->SetHit(xhit,yhit,zhit);
89         // get the list of nearest neighbours
90         Int_t nList, xList[10], yList[10];
91         segmentation->Neighbours(ix,iy,&nList,xList,yList);
92         
93         qp = 0;
94         for (Int_t j=0; j<nList; j++){       // loop over neighbours      
95           if (xList[j]!=0) {                 // existing neighbour          
96             if (j==0||j==5||qp!=0) {         // built-up cluster-size
97               
98               // neighbour real coordinates (just for checks here)
99               Float_t x,y,z;
100               segmentation->GetPadC(xList[j],yList[j],x,y,z);
101               // set pad (fx fy & fix fiy are the current pad coord. & Id.)
102               segmentation->SetPad(xList[j],yList[j]);    
103               // get the chamber (i.e. current strip) response
104               qp=fResponse->IntXY(segmentation);          
105               
106               if (qp > 0.5) {           
107                 // --- store signal information for neighbours 
108                 newclust[0][nnew]=qp;                      // total charge
109                 newclust[1][nnew]=segmentation->Ix();      // ix-pos. of pad
110                 newclust[2][nnew]=segmentation->Iy();      // iy-pos. of pad
111                 newclust[3][nnew]=twentyNano;              // time of flight
112                 newclust[4][nnew]=segmentation->ISector(); // sector id
113                 newclust[5][nnew]=(Float_t) i;             // counter
114                 nnew++;
115               } // qp > 0.5 
116             } // built-up cluster-size
117           } // existing neighbour
118         } // loop over neighbours
119       } // endif hit w/o strip
120     } // loop over planes
121   } // if AliMUONResponseTriggerV1
122 }
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