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18 Revision 1.1 2000/10/06 09:00:47 morsch
19 Segmentation class for chambers built out of slats.
23 #include "AliMUONSegmentationSlatN.h"
24 #include "AliMUONSegmentationSlatModuleN.h"
27 #include "TObjArray.h"
31 //___________________________________________
32 ClassImp(AliMUONSegmentationSlatN);
36 AliMUONSegmentationSlatN::AliMUONSegmentationSlatN()
38 // Default constructor
42 Float_t AliMUONSegmentationSlatN::Dpx(Int_t isec) const
45 // Returns y-pad size for given sector isec
49 Float_t AliMUONSegmentationSlatN::Dpy(Int_t isec) const
52 // Returns x-pad size for given sector isec
53 // isec = 100*islat+iregion
58 return Slat(islat)->Dpy(iregion);
63 void AliMUONSegmentationSlatN::GlobalToLocal(
64 Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
67 // Perform local to global transformation for pad coordinates
69 Int_t iytemp = TMath::Abs(iy);
76 // Find slat number (index) and iylocal
77 for (Int_t i=0; i<fNSlats; i++) {
78 if (ix <= Slat(i)->Npx()) {
79 Int_t isec=Slat(i)->Sector(ix,1);
80 iytemp-=Slat(i)->Npy()*(*fNDiv)[isec]/(*fNDiv)[1];
82 if (iytemp <= 0) break;
91 void AliMUONSegmentationSlatN::LocalToGlobal(
92 Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
94 // Local to global transformation for pad coordinates
100 // Find iy global by adding iy offset from slats below
101 for (i=0; i<islat; i++) {
102 if (ixlocal <= Slat(i)->Npx()) {
103 Int_t isec=Slat(i)->Sector(ixlocal,1);
104 iy+=Slat(i)->Npy()*(*fNDiv)[isec]/(*fNDiv)[1];
108 // Perform symmetry transformation
114 void AliMUONSegmentationSlatN::
115 GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
117 // Returns pad coordinates for given set of space coordinates
120 Float_t xlocal, ylocal;
121 // Transform to local coordinates
122 AliMUONSegmentationSlat::GlobalToLocal(x,y,z,islat,xlocal,ylocal);
123 Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
124 // add to local iy offfset from slats below
125 for (i=0; i<islat; i++) {
126 if (ix <= Slat(i)->Npx()) {
127 Int_t isec=Slat(i)->Sector(ix,1);
128 iy+=Slat(i)->Npy()*(*fNDiv)[isec]/(*fNDiv)[1];
131 // Determine sign depending on quadrant
132 ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
133 iy=iy*Int_t(TMath::Sign((Float_t)1.,y));
137 AliMUONSegmentationSlatModule* AliMUONSegmentationSlatN::
140 // Factory method for slat module
141 return new AliMUONSegmentationSlatModuleN();