+//----------------------------------------------------------------------
+Int_t AliITSsegmentationSPD::GetChipFromChannel(Int_t, Int_t iz) const {
+ // returns chip number (in range 0-4) starting from channel number
+ if(iz>=fNpz || iz<0 ){
+ AliWarning("Bad cell number");
+ return -1;
+ }
+ Int_t theChip=iz/fgkNcolumnsPerChip;
+ return theChip;
+}
+//----------------------------------------------------------------------
+Int_t AliITSsegmentationSPD::GetChipFromLocal(Float_t, Float_t zloc) const {
+ // returns chip number (in range 0-4) starting from local coordinates
+ Int_t ix0,iz;
+ if (!LocalToDet(0,zloc,ix0,iz)) {
+ AliWarning("Bad local coordinate");
+ return -1;
+ }
+ return GetChipFromChannel(ix0,iz);
+}
+//----------------------------------------------------------------------
+Int_t AliITSsegmentationSPD::GetChipsInLocalWindow(Int_t* array, Float_t zmin, Float_t zmax, Float_t, Float_t) const {
+ // returns the number of chips containing a road defined by given local coordinate limits
+
+ const Float_t kconv = 1.0E-04; // converts microns to cm.
+
+ if (zmin>zmax) {
+ AliWarning("Bad coordinate limits: zmin>zmax!");
+ return -1;
+ }
+
+ Int_t nChipInW = 0;
+
+ Float_t zminDet = -0.5*kconv*Dz();
+ Float_t zmaxDet = 0.5*kconv*Dz();
+ if(zmin<zminDet) zmin=zminDet;
+ if(zmax>zmaxDet) zmax=zmaxDet;
+
+ Int_t n1 = GetChipFromLocal(0,zmin);
+ array[nChipInW] = n1;
+ nChipInW++;
+
+ Int_t n2 = GetChipFromLocal(0,zmax);
+
+ if(n2!=n1){
+ Int_t imin=TMath::Min(n1,n2);
+ Int_t imax=TMath::Max(n1,n2);
+ for(Int_t ichip=imin; ichip<=imax; ichip++){
+ if(ichip==n1) continue;
+ array[nChipInW]=ichip;
+ nChipInW++;
+ }
+ }
+
+ return nChipInW;
+}
+//----------------------------------------------------------------------