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 1.2 2000/06/15 07:58:48 morsch
19 Code from MUON-dev joined
21 Revision 1.1.2.1 2000/06/09 21:38:15 morsch
22 AliMUONSegmentationV04 code from AliMUONSegResV04.cxx
26 /////////////////////////////////////////////////////
27 // Segmentation and Response classes version 04 //
28 /////////////////////////////////////////////////////
31 #include "AliMUONSegmentationV04.h"
34 //___________________________________________
35 ClassImp(AliMUONSegmentationV04)
38 void AliMUONSegmentationV04::Init(Int_t chamber)
40 printf("\n Initialise segmentation v04 \n");
42 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
43 // These arrays help in converting from real to pad co-ordinates and
46 // Segmentation is defined by rectangular modules approximating
47 // concentric circles as shown below
49 // PCB module size in cm
50 const Float_t kDxPCB=40, kDyPCB=40;
51 // PCB distribution (7 rows with 1+3 segmentation regions)
52 const Int_t kpcb[7][4] = {{1, 2, 2, 2},
64 // 3 3 3 2 2 | 2 2 3 3 3
65 // 3 3 3 2 2 2 | 2 2 2 3 3 3
66 // 3 3 2 2 1 1 | 1 1 2 2 3 3
67 // 3 3 2 2 1 1 1 | 1 1 1 2 2 3 3
68 // 3 3 2 2 1 1 0 | 0 1 1 2 2 3 3
69 // ------------------------------
70 // 3 3 2 2 1 1 0 | 0 1 1 2 2 3 3
71 // 3 3 2 2 1 1 1 | 1 1 1 2 2 3 3
72 // 3 3 2 2 1 1 | 1 1 2 2 3 3
73 // 3 3 3 2 2 2 | 2 2 2 3 3 3
74 // 3 3 3 2 2 | 2 2 3 3 3
78 // number of pad rows per PCB
80 Int_t nPyPCB=Int_t(kDyPCB/fDpy);
82 // maximum number of pad rows
85 // Calculate padsize along x
88 for (Int_t i=fNsec-2; i>=0; i--){
89 fDpxD[i]=fDpxD[fNsec-1]/fNDiv[i];
90 printf("\n test ---dx %d %f \n",i,fDpxD[i]);
94 // fill the arrays defining the pad segmentation boundaries
96 // loop over pcb module rows
98 for (Int_t irow=0; irow<7; irow++) {
100 // loop over pads along the anode wires
101 for (Int_t i=0; i<=nPyPCB; i++) {
102 // iy counts the padrow
104 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
105 for (Int_t isec=0; isec<4; isec++) {
107 fNpxS[0][iy]=kpcb[irow][0]*Int_t(kDxPCB/fDpxD[0]);
108 fCx[0][iy]=kpcb[irow][0]*kDxPCB;
110 fNpxS[isec][iy]=fNpxS[isec-1][iy]
111 +kpcb[irow][isec]*Int_t(kDxPCB/fDpxD[isec]);
113 fCx[isec][iy]=fCx[isec-1][iy]
114 +kpcb[irow][isec]*kDxPCB;
117 } // pad raws in module
121 void AliMUONSegmentationV04::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y)
123 // Returns test point on the pad plane.
124 // Used during determination of the segmoid correction of the COG-method
126 x[0]=(fCx[1][1]+fCx[0][1])/2/TMath::Sqrt(2.);
128 x[1]=(fCx[2][1]+fCx[1][1])/2/TMath::Sqrt(2.);
130 x[2]=(fCx[3][1]+fCx[2][1])/2/TMath::Sqrt(2.);