X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=ITS%2FAliITSsegmentationSPD.cxx;h=b78ce1225161bf27d8b836ae7219e9df56d2923d;hb=b4ba71822fadca2efdf09f530408d0ebf3222f5f;hp=23da1e76aa5c72653f0ff93246d756241b699e38;hpb=5d3918d642d49f478ca45cbe3f5ebc9910373d11;p=u%2Fmrichter%2FAliRoot.git

diff --git a/ITS/AliITSsegmentationSPD.cxx b/ITS/AliITSsegmentationSPD.cxx
index 23da1e76aa5..b78ce122516 100644
--- a/ITS/AliITSsegmentationSPD.cxx
+++ b/ITS/AliITSsegmentationSPD.cxx
@@ -13,16 +13,50 @@
  * provided "as is" without express or implied warranty.                  *
  **************************************************************************/
 
-#include <TMath.h>
-#include <TF1.h>
-
+/* $Id$ */
+#include <TGeoManager.h>
+#include <TGeoVolume.h>
+#include <TGeoBBox.h>
 #include "AliITSsegmentationSPD.h"
-#include "AliITSgeom.h"
 
+//////////////////////////////////////////////////////
+// Segmentation class for                           //
+// pixels                                           //
+//                                                  //
+//////////////////////////////////////////////////////
+const Int_t AliITSsegmentationSPD::fgkNchipsPerModule = 5;
+const Int_t AliITSsegmentationSPD::fgkNcolumnsPerChip = 32;
 ClassImp(AliITSsegmentationSPD)
 
+//_____________________________________________________________________________
+  AliITSsegmentationSPD::AliITSsegmentationSPD(Option_t *opt): AliITSsegmentation(),
+fNpx(0),
+fNpz(0){
+  // Default constructor
+
+  // Initialization to default values
+  Init();
+
+  // Initialization of detector dimensions from TGeo
+  if(strstr(opt,"TGeo")){
+    if(!gGeoManager){
+      AliError("Geometry is not initialized\n Using hardwired default values");
+      return;
+    }
+    TGeoVolume *v=NULL;
+    v = gGeoManager->GetVolume("ITSSPDlay1-sensor");
+    if(!v){
+      AliWarning("TGeo volume ITSSPDlay1-sensor not found (hint: use v11Hybrid geometry)\n Using hardwired default values");
+    }
+    else {
+      TGeoBBox *s=(TGeoBBox*)v->GetShape();
+      SetDetSize(s->GetDX()*20000.,s->GetDZ()*20000.,s->GetDY()*20000.);
+    }
+  }
+}
 
-Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) {
+//_____________________________________________________________________________
+Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) const {
 // Get column number for each z-coordinate taking into account the 
 // extra pixels in z direction assuming 300 micron sized pixels.
      Float_t col = 0.0;
@@ -31,7 +65,7 @@ Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) {
      return col;
 }
 //_____________________________________________________________________________
-Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) {
+Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) const {
 // same comments as above
 // Get z-coordinate for each colunm number
   Float_t pitchz = 300.0;
@@ -40,12 +74,13 @@ Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) {
   return z;
 }
 //_____________________________________________________________________________
-Float_t AliITSsegmentationSPD::ZpitchFromCol300(Int_t col) {
+Float_t AliITSsegmentationSPD::Zpitch300() const {
   // returns Z pixel pitch for 300 micron pixels.
-  return 300.0;
+
+    return 300.0;
 }
 //_____________________________________________________________________________
-Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) {
+Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) const {
     // hard-wired - keep it like this till we can parametrise 
     // and get rid of AliITSgeomSPD425
     // Get column number for each z-coordinate taking into account the 
@@ -54,15 +89,15 @@ Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) {
     Float_t s,col;
 
     if(z<0||z>fDz){
-	Error("ColFromZ","z=%f outside of range 0.0<=z<fDz=%f",z,fDz);
+	AliError(Form("z=%f outside of range 0.0<=z<fDz=%f",z,fDz));
 	return 0.0; // error
     } // end if outsize of detector
     s = 0.0;
     i = -1;
-    while(z>s){
-	i++;
-	s += fCellSizeZ[i];
-    } // end while
+    do {
+      i++;
+      s += fCellSizeZ[i];
+    } while(z>s);
     s -= fCellSizeZ[i];
     col = (Float_t) i + (z-s)/fCellSizeZ[i];
     return col;
@@ -102,14 +137,14 @@ Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) {
 }
 
 //_____________________________________________________________________________
-Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) {
+Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) const {
     // same comments as above
     // Get z-coordinate for each colunm number
     Int_t i;
     Float_t z;
 
     if(col<0||col>=fNpz){
-	Error("ZFromCol","col=%d outside of range 0<=col<fNpZ=%d",col,fNpz);
+	AliError(Form("col=%d outside of range 0<=col<fNpZ=%d",col,fNpz));
 	return 0.0; // error
     } // end if outsize of detector
     z = 0.0;
@@ -152,65 +187,57 @@ Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) {
   return z;*/
 }
 //______________________________________________________________________
-Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) {
+Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) const {
     // Get pitch size in z direction for each colunm
 
-   Float_t pitchz = 425;
+   Float_t pitchz = 425.;
     if(col < 0){
 	pitchz = 0.0;
     } else if(col >=  31 && col <=  32) {
-	pitchz = 625;
+	pitchz = 625.;
     } else if(col >=  63 && col <=  64) {
-	pitchz = 625;
+	pitchz = 625.;
     } else if(col >=  95 && col <=  96) {
-	pitchz = 625;
+	pitchz = 625.;
     } else if(col >= 127 && col <= 128) {
-	pitchz = 625;
+	pitchz = 625.;
     } else if(col >= 159 && col <= 160) {
-	pitchz = 625;
+	pitchz = 625.;
     } else if(col>=192){
-	pitchz = 0.0;
+	pitchz = 425.;
     }
     return pitchz;
 }
-//______________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(){
-  // Default constructor
-   fNpx = 0;
-   fNpz = 0;
-   fCorr=0;
-   fGeom = 0;
 
-}
 //______________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm){
-  // Constructor
-   fCorr=0;
-   fNpx = 0;
-   fNpz = 0;
-   Init(); 
-   fGeom = gm;
-
+void AliITSsegmentationSPD::Copy(TObject &obj) const {
+  // protected method. copy this to obj
+  AliITSsegmentation::Copy(obj);
+  ((AliITSsegmentationSPD& ) obj).fNpx  = fNpx;
+  ((AliITSsegmentationSPD& ) obj).fNpz  = fNpz;
+  Int_t i;
+  for(i=0;i<256;i++) 
+         ((AliITSsegmentationSPD& ) obj).fCellSizeX[i] = fCellSizeX[i];
+  for(i=0;i<280;i++) 
+         ((AliITSsegmentationSPD& ) obj).fCellSizeZ[i] = fCellSizeZ[i];
 }
+
 //______________________________________________________________________
-AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(AliITSsegmentationSPD &source){
+AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(const AliITSsegmentationSPD &source){
    // = operator
    if(this==&source) return *this;
-   this->fNpx  = source.fNpx;
-   this->fNpz  = source.fNpz;
-   this->fDx   = source.fDx;
-   this->fDy   = source.fDy;
-   Int_t i;
-   for(i=0;i<256;i++) this->fCellSizeX[i] = source.fCellSizeX[i];
-   for(i=0;i<280;i++) this->fCellSizeZ[i] = source.fCellSizeZ[i];
-   this->fCorr = new TF1(*(source.fCorr));// make a proper copy of the function
-   this->fGeom = source.fGeom; // copy only the pointers.
+   source.Copy(*this);
    return *this;
 }
 //____________________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSsegmentationSPD &source){
+AliITSsegmentationSPD::AliITSsegmentationSPD(const AliITSsegmentationSPD &source) :
+    AliITSsegmentation(source),
+fNpx(0),
+fNpz(0){
+  for(Int_t i=0; i<256; i++)fCellSizeX[i]=0.;
+  for(Int_t i=0; i<280; i++)fCellSizeZ[i]=0.;
   // copy constructor
-   *this = source;
+  source.Copy(*this);
 }
 //----------------------------------------------------------------------
 void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){
@@ -219,7 +246,7 @@ void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){
     Int_t i;
 
     for(i=0;i<256;i++) fCellSizeX[i] = x[i];
-    for(i=0;i<280;i++) fCellSizeX[i] = z[i];
+    for(i=0;i<280;i++) fCellSizeZ[i] = z[i];
     return;
 }
 //----------------------------------------------------------------------
@@ -234,8 +261,8 @@ void AliITSsegmentationSPD::Init300(){
     fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
     fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size
     for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
-    for(i=0;i<fNpz;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns
-    for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
+    for(i=0;i<280;i++) fCellSizeZ[i] = Zpitch300(); // microns
+//    for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
     fDx = 0;
     for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
     fDz = 0;
@@ -245,24 +272,27 @@ void AliITSsegmentationSPD::Init300(){
 
 //------------------------------
 void AliITSsegmentationSPD::Init(){
-// Initialize infromation for 6 read out chip 425X50 micron pixel SPD 
-// detectors. This chip is 150 microns thick by 1.28 cm in x by 8.375 cm
-// long. It has 256  50 micron pixels in x and 197 mostly 425 micron size
-// pixels in z. The two pixels between each readout chip are 625 microns long.
-
-    //const Float_t kconv=10000.;
-    Int_t i;
-    fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
-    fNpz = 192; // The number of Z pixel Cell same as in fCellSizeZ array size
-    for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
-    for(i=0;i<fNpz;i++) fCellSizeZ[i] = ZpitchFromCol(i); // microns
-    for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
-    fDx = 0;
-    for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
-    fDz = 0;
-    for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i];
-    fDy = 300.0; //microns  SPD sensitive layer thickness
-    //printf(" AliITSsegmentationSPD - Init: fNpx fNpz fDx fDz %d %d %f %f\n",fNpx, fNpz, fDx, fDz);
+// Initialize information for 5 read out chip 425X50 micron pixel SPD 
+// detectors (ladder).
+// Each readout chip is 150 micron thick.
+// The ladder sensor is 200 micron thick by 1.28 cm in x by 6.96 cm in z.
+// It has 256 50 micron pixels in x and 160 mostly 425 micron pixels in z.
+// The two pixels at boundary between two adjacent readout chips are 
+// 625 micron long.
+
+  Float_t bx[256],bz[280];
+  Int_t i;
+  SetNPads(256,160);  // Number of Bins in x and z
+  for(i=000;i<256;i++) bx[i] =  50.0; // in x all are 50 microns.
+  for(i=000;i<160;i++) bz[i] = 425.0; // most are 425 microns except below
+  for(i=160;i<280;i++) bz[i] =   0.0; // Outside of detector.
+  bz[ 31] = bz[ 32] = 625.0; // first chip boundary
+  bz[ 63] = bz[ 64] = 625.0; // first chip boundary
+  bz[ 95] = bz[ 96] = 625.0; // first chip boundary
+  bz[127] = bz[128] = 625.0; // first chip boundary
+  bz[160] = 425.0; // Set so that there is no zero pixel size for fNz.
+  SetBinSize(bx,bz); 
+  SetDetSize(12800,69600,200);  // full lengths (x,z,y) in microns 
 
 }
 //------------------------------
@@ -274,30 +304,21 @@ void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){
     fNpz=p2;
 
 }
-//------------------------------
-void AliITSsegmentationSPD::SetDetSize(Float_t p1, Float_t p2, Float_t p3){
-  // for SPD this function should be used ONLY when a beam test setup 
-  // configuration is studied
-
-    fDx=p1;
-    fDz=p2;
-    fDy=p3;
 
-}
 //------------------------------
-Float_t AliITSsegmentationSPD::Dpx(Int_t i){
+Float_t AliITSsegmentationSPD::Dpx(Int_t i) const {
     //returs x pixel pitch for a give pixel
     if(i<0||i>=256) return 0.0;
     return fCellSizeX[i];
 }
 //------------------------------
-Float_t AliITSsegmentationSPD::Dpz(Int_t i){
+Float_t AliITSsegmentationSPD::Dpz(Int_t i) const {
     // returns z pixel pitch for a give pixel
     if(i<0||i>=280) return 0.0;
     return fCellSizeZ[i];
 }
 //------------------------------
-void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz){
+void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz) const {
 //  Returns pixel coordinates (ix,iz) for given real local coordinates (x,z)
 //
 
@@ -319,7 +340,7 @@ void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz){
 }
 
 //------------------------------
-void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z){
+void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z) const{
 //  local transformation of real local coordinates (x,z)
 //
 
@@ -333,7 +354,7 @@ void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z){
 
 }
 //------------------------------
-void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z){
+void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z) const {
     // Transform from pixel to real local coordinates
 
     // returns x, z in microns
@@ -347,7 +368,7 @@ void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z){
 }
 //------------------------------
 void AliITSsegmentationSPD::
-Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){
+Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const {
   // returns the neighbouring pixels for use in Cluster Finders and the like.
   /*
     *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1;
@@ -377,19 +398,24 @@ Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){
     Zlist[7]=iZ-1;
 }
 //______________________________________________________________________
-void AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz){
-// Transformation from Geant detector centered local coordinates (cm) to
-// Pixel cell numbers ix and iz.
-// Input:
-// Float_t   x        detector local coordinate x in cm with respect to the
-//                    center of the sensitive volume.
-// Float_t   z        detector local coordinate z in cm with respect to the
-//                    center of the sensitive volulme.
-// Output:
-// Int_t    ix        detector x cell coordinate. Has the range 0<=ix<fNpx.
-// Int_t    iz        detector z cell coordinate. Has the range 0<=iz<fNpz.
-//   A value of -1 for ix or iz indecates that this point is outside of the
-// detector segmentation as defined.
+Bool_t AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z,
+                                         Int_t &ix,Int_t &iz) const {
+    // Transformation from Geant detector centered local coordinates (cm) to
+    // Pixel cell numbers ix and iz.
+    // Input:
+    //    Float_t   x        detector local coordinate x in cm with respect to
+    //                       the center of the sensitive volume.
+    //    Float_t   z        detector local coordinate z in cm with respect to
+    //                       the center of the sensitive volulme.
+    // Output:
+    //    Int_t    ix        detector x cell coordinate. Has the range 
+    //                       0<=ix<fNpx.
+    //    Int_t    iz        detector z cell coordinate. Has the range 
+    //                       0<=iz<fNpz.
+    // Return:
+    //   kTRUE if point x,z is inside sensitive volume, kFALSE otherwise.
+    //   A value of -1 for ix or iz indecates that this point is outside of the
+    //   detector segmentation as defined.
     Int_t i,j;
     Float_t dx,dz;
     const Float_t kconv = 1.0E-04; // converts microns to cm.
@@ -398,24 +424,24 @@ void AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz){
     dz = -0.5*kconv*Dz();
     ix = -1;
     iz = -1;
-    if(x<dx) return; // outside x range.
-    if(z<dz) return; // outside z range.
+    if(x<dx) return kFALSE; // outside x range.
+    if(z<dz) return kFALSE; // outside z range.
     for(i=0;i<Npx();i++){
 	dx += kconv*fCellSizeX[i];
 	if(x<dx) break;
     } // end for i
-    if(i>=Npx()) return; // outside x range.
+    if(i>=Npx()) return kFALSE; // outside x range.
     for(j=0;j<Npz();j++){
 	dz += kconv*fCellSizeZ[j];
 	if(z<dz) break;
     } // end for j
-    if(j>=Npz()) return; // outside z range.
+    if(j>=Npz()) return kFALSE; // outside z range.
     ix = i;
     iz = j;
-    return; // Found ix and iz, return.
+    return kTRUE; // Found ix and iz, return.
 }
 //______________________________________________________________________
-void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z)
+void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const
 {
 // Transformation from Detector cell coordiantes to Geant detector centerd 
 // local coordinates (cm).
@@ -442,3 +468,99 @@ void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z)
     z += 0.5*kconv*fCellSizeZ[iz]; // add 1/2 of cell iz for center location.
     return; // Found x and z, return.
 }
+//______________________________________________________________________
+void AliITSsegmentationSPD::CellBoundries(Int_t ix,Int_t iz,
+					  Double_t &xl,Double_t &xu,
+					  Double_t &zl,Double_t &zu) const
+{
+// Transformation from Detector cell coordiantes to Geant detector centerd 
+// local coordinates (cm).
+// Input:
+// Int_t    ix        detector x cell coordinate. Has the range 0<=ix<fNpx.
+// Int_t    iz        detector z cell coordinate. Has the range 0<=iz<fNpz.
+// Output:
+// Double_t   xl       detector local coordinate cell lower bounds x in cm
+//                    with respect to the center of the sensitive volume.
+// Double_t   xu       detector local coordinate cell upper bounds x in cm 
+//                    with respect to the center of the sensitive volume.
+// Double_t   zl       detector local coordinate lower bounds z in cm with
+//                    respect to the center of the sensitive volulme.
+// Double_t   zu       detector local coordinate upper bounds z in cm with 
+//                    respect to the center of the sensitive volulme.
+// If ix and or iz is outside of the segmentation range a value of -0.5*Dx()
+// and -0.5*Dx() or -0.5*Dz() and -0.5*Dz() are returned.
+    Int_t i,j;
+    const Float_t kconv = 1.0E-04; // converts microns to cm.
+    Float_t x,z;
+
+    xl = xu = x = -0.5*kconv*Dx(); // default value.
+    zl = zu = z = -0.5*kconv*Dz(); // default value.
+    if(ix<0 || ix>=Npx()) return; // outside of detector
+    if(iz<0 || iz>=Npz()) return; // outside of detctor
+    for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1
+    xl = x;
+    x += kconv*fCellSizeX[ix];
+    xu = x;
+    for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1
+    zl = z;
+    z += kconv*fCellSizeZ[iz];
+    zu = z;
+    return; // Found x and z, return.
+}
+//----------------------------------------------------------------------
+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;
+}
+//----------------------------------------------------------------------