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 2001/01/26 21:25:48 morsch
19 Empty default constructors and.
21 Revision 1.3 2000/10/22 16:55:43 morsch
22 Use only x-symmetry in global to local transformations and delegation.
24 Revision 1.2 2000/10/09 14:06:18 morsch
25 Some type cast problems of type (TMath::Sign((Float_t)1.,x)) corrected (P.H.)
27 Revision 1.1 2000/10/06 09:00:47 morsch
28 Segmentation class for chambers built out of slats.
32 #include "AliMUONSegmentationSlatN.h"
33 #include "AliMUONSegmentationSlatModuleN.h"
36 #include "TObjArray.h"
38 #include <Riostream.h>
40 //___________________________________________
41 ClassImp(AliMUONSegmentationSlatN);
43 AliMUONSegmentationSlatN::AliMUONSegmentationSlatN()
45 // Default constructor
49 AliMUONSegmentationSlatN::AliMUONSegmentationSlatN(Int_t nsec)
50 : AliMUONSegmentationSlat(nsec)
52 // Non default constructor
56 Float_t AliMUONSegmentationSlatN::Dpx(Int_t isec) const
59 // Returns y-pad size for given sector isec
63 Float_t AliMUONSegmentationSlatN::Dpy(Int_t isec) const
66 // Returns x-pad size for given sector isec
67 // isec = 100*islat+iregion
72 return Slat(islat)->Dpy(iregion);
77 void AliMUONSegmentationSlatN::GlobalToLocal(
78 Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
81 // Perform local to global transformation for pad coordinates
90 // Find slat number (index) and iylocal
91 for (Int_t i=0; i<fNSlats; i++) {
92 if (ix <= Slat(i)->Npx()) {
93 Int_t isec=Slat(i)->Sector(ix,1);
94 iytemp-=Slat(i)->Npy()*(*fNDiv)[isec]/(*fNDiv)[1];
96 if (iytemp <= 0) break;
104 void AliMUONSegmentationSlatN::LocalToGlobal(
105 Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
107 // Local to global transformation for pad coordinates
113 // Find iy global by adding iy offset from slats below
114 for (i=0; i<islat; i++) {
115 if (ixlocal <= Slat(i)->Npx()) {
116 Int_t isec=Slat(i)->Sector(ixlocal,1);
117 iy+=Slat(i)->Npy()*(*fNDiv)[isec]/(*fNDiv)[1];
121 // Perform symmetry transformation
126 void AliMUONSegmentationSlatN::
127 GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
129 // Returns pad coordinates for given set of space coordinates
132 Float_t xlocal, ylocal;
133 // Transform to local coordinates
134 AliMUONSegmentationSlat::GlobalToLocal(x,y,z,islat,xlocal,ylocal);
135 Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
136 // add to local iy offfset from slats below
137 for (i=0; i<islat; i++) {
138 if (ix <= Slat(i)->Npx()) {
139 Int_t isec=Slat(i)->Sector(ix,1);
140 iy+=Slat(i)->Npy()*(*fNDiv)[isec]/(*fNDiv)[1];
143 // Determine sign depending on quadrant
144 ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
147 AliMUONSegmentationSlatModule* AliMUONSegmentationSlatN::
150 // Factory method for slat module
151 return new AliMUONSegmentationSlatModuleN(4);