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 1.1.2.1 2000/06/09 21:38:46 morsch
19 AliMUONSegmentationV05 code from AliMUONSegResV05.cxx
23 /////////////////////////////////////////////////////
24 // Segmentation and Response classes version 05 //
25 /////////////////////////////////////////////////////
28 #include "AliMUONSegmentationV05.h"
30 //___________________________________________
31 ClassImp(AliMUONSegmentationV05)
34 void AliMUONSegmentationV05::Init(AliMUONChamber* Chamber)
36 printf("\n Initialise segmentation v05 \n");
38 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
39 // These arrays help in converting from real to pad co-ordinates and
42 // Segmentation is defined by rectangular modules approximating
43 // concentric circles as shown below
45 // PCB module size in cm
46 const Float_t kDxPCB=40, kDyPCB=40;
47 // PCB distribution (7 rows with 1+3 segmentation regions)
48 const Int_t kpcb[7][4] = {{1, 2, 2, 2},
60 // 3 3 3 2 2 | 2 2 3 3 3
61 // 3 3 3 2 2 2 | 2 2 2 3 3 3
62 // 3 3 2 2 1 1 | 1 1 2 2 3 3
63 // 3 3 2 2 1 1 1 | 1 1 1 2 2 3 3
64 // 3 3 2 2 1 1 0 | 0 1 1 2 2 3 3
65 // ------------------------------
66 // 3 3 2 2 1 1 0 | 0 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 | 1 1 2 2 3 3
69 // 3 3 3 2 2 2 | 2 2 2 3 3 3
70 // 3 3 3 2 2 | 2 2 3 3 3
74 // number of pad rows per PCB
76 Int_t nPyPCB=Int_t(kDyPCB/fDpy);
78 // maximum number of pad rows
81 // Calculate padsize along x
84 for (Int_t i=fNsec-2; i>=0; i--){
85 fDpxD[i]=fDpxD[fNsec-1]/fNDiv[i];
86 printf("\n test ---dx %d %f \n",i,fDpxD[i]);
90 // fill the arrays defining the pad segmentation boundaries
92 // loop over pcb module rows
94 for (Int_t irow=0; irow<7; irow++) {
96 // loop over pads along the anode wires
97 for (Int_t i=0; i<=nPyPCB; i++) {
98 // iy counts the padrow
100 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
101 for (Int_t isec=0; isec<4; isec++) {
103 fNpxS[0][iy]=kpcb[irow][0]*Int_t(kDxPCB/fDpxD[0]);
104 fCx[0][iy]=kpcb[irow][0]*kDxPCB;
106 fNpxS[isec][iy]=fNpxS[isec-1][iy]
107 +kpcb[irow][isec]*Int_t(kDxPCB/fDpxD[isec]);
109 fCx[isec][iy]=fCx[isec-1][iy]
110 +kpcb[irow][isec]*kDxPCB;
113 } // pad raws in module
116 for (Int_t iy=1; iy< fNpy; iy++) {
117 printf("\nBoundary %d %f %d %f %d %f %d %f",
118 fNpxS[0][iy], fCx[0][iy],
119 fNpxS[1][iy], fCx[1][iy],
120 fNpxS[2][iy], fCx[2][iy],
121 fNpxS[3][iy], fCx[3][iy]);
127 void AliMUONSegmentationV05::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y)
129 // Returns test point on the pad plane.
130 // Used during determination of the segmoid correction of the COG-method
132 x[0]=(fCx[1][1]+fCx[0][1])/2/TMath::Sqrt(2.);