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 Revision 1.4 2000/10/03 21:48:07 morsch
19 Adopt to const declaration of some of the methods in AliSegmentation.
21 Revision 1.3 2000/06/29 12:34:09 morsch
22 AliMUONSegmentation class has been made independent of AliMUONChamber. This makes
23 it usable with any other geometry class. The link to the object to which it belongs is
24 established via an index. This assumes that there exists a global geometry manager
25 from which the pointer to the parent object can be obtained (in our case gAlice).
27 Revision 1.2 2000/06/15 07:58:48 morsch
28 Code from MUON-dev joined
30 Revision 1.1.2.1 2000/06/09 21:38:46 morsch
31 AliMUONSegmentationV05 code from AliMUONSegResV05.cxx
35 /////////////////////////////////////////////////////
36 // Segmentation and Response classes version 05 //
37 /////////////////////////////////////////////////////
40 #include "AliMUONSegmentationV05.h"
42 #include "AliMUONChamber.h"
46 //___________________________________________
47 ClassImp(AliMUONSegmentationV05)
50 void AliMUONSegmentationV05::Init(Int_t chamber)
52 printf("\n Initialise Segmentation V05 \n");
54 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
55 // These arrays help in converting from real to pad co-ordinates and
58 // Segmentation is defined by rectangular modules approximating
59 // concentric circles as shown below
61 // PCB module size in cm
62 const Float_t kDxPCB=40, kDyPCB=40;
63 // PCB distribution (7 rows with 1+3 segmentation regions)
64 const Int_t kpcb[7][4] = {{1, 2, 2, 2},
76 // 3 3 3 2 2 | 2 2 3 3 3
77 // 3 3 3 2 2 2 | 2 2 2 3 3 3
78 // 3 3 2 2 1 1 | 1 1 2 2 3 3
79 // 3 3 2 2 1 1 1 | 1 1 1 2 2 3 3
80 // 3 3 2 2 1 1 0 | 0 1 1 2 2 3 3
81 // ------------------------------
82 // 3 3 2 2 1 1 0 | 0 1 1 2 2 3 3
83 // 3 3 2 2 1 1 1 | 1 1 1 2 2 3 3
84 // 3 3 2 2 1 1 | 1 1 2 2 3 3
85 // 3 3 3 2 2 2 | 2 2 2 3 3 3
86 // 3 3 3 2 2 | 2 2 3 3 3
90 // number of pad rows per PCB
92 Int_t nPyPCB=Int_t(kDyPCB/fDpy);
94 // maximum number of pad rows
97 // Calculate padsize along x
98 (*fDpxD)[fNsec-1]=fDpx;
100 for (Int_t i=fNsec-2; i>=0; i--){
101 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
105 // fill the arrays defining the pad segmentation boundaries
107 // loop over pcb module rows
109 for (Int_t irow=0; irow<7; irow++) {
111 // loop over pads along the anode wires
112 for (Int_t i=0; i<=nPyPCB; i++) {
113 // iy counts the padrow
115 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
116 for (Int_t isec=0; isec<4; isec++) {
118 fNpxS[0][iy]=kpcb[irow][0]*Int_t(kDxPCB/(*fDpxD)[0]);
119 fCx[0][iy]=kpcb[irow][0]*kDxPCB;
121 fNpxS[isec][iy]=fNpxS[isec-1][iy]
122 +kpcb[irow][isec]*Int_t(kDxPCB/(*fDpxD)[isec]);
124 fCx[isec][iy]=fCx[isec-1][iy]
125 +kpcb[irow][isec]*kDxPCB;
128 } // pad raws in module
131 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
132 fChamber=&(pMUON->Chamber(chamber));
136 void AliMUONSegmentationV05::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) const
138 // Returns test point on the pad plane.
139 // Used during determination of the segmoid correction of the COG-method
141 x[0]=(fCx[1][1]+fCx[0][1])/2/TMath::Sqrt(2.);