X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=ITS%2FAliITSsegmentationSPD.cxx;h=f1f1d2eb1ce59acac1e25569e813d78f2a975bf9;hb=69e406a75103fa07021c452da6ea770a8ed6b342;hp=69b0d4340ebf60a89182973348bb6a6d0383d2d6;hpb=b0f5e3fcf84ecedb50df35ebe629b44bafc15bc0;p=u%2Fmrichter%2FAliRoot.git

diff --git a/ITS/AliITSsegmentationSPD.cxx b/ITS/AliITSsegmentationSPD.cxx
index 69b0d4340eb..f1f1d2eb1ce 100644
--- a/ITS/AliITSsegmentationSPD.cxx
+++ b/ITS/AliITSsegmentationSPD.cxx
@@ -13,14 +13,28 @@
  * provided "as is" without express or implied warranty.                  *
  **************************************************************************/
 
-#include <TMath.h>
-
 #include "AliITSsegmentationSPD.h"
-
+//#include "AliITSgeom.h"
+//////////////////////////////////////////////////////
+// Segmentation class for                           //
+// pixels                                           //
+//                                                  //
+//////////////////////////////////////////////////////
 ClassImp(AliITSsegmentationSPD)
 
+//_____________________________________________________________________________
+  AliITSsegmentationSPD::AliITSsegmentationSPD(): AliITSsegmentation(),
+fNpx(0),
+fNpz(0){
+  // Default constructor
+  for(Int_t k=0; k<256; k++){
+    fCellSizeX[k] = 0.;
+    fCellSizeZ[k] = 0.;
+  }
+}
 
-Float_t 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;
@@ -29,7 +43,7 @@ Float_t ColFromZ300(Float_t z) {
      return col;
 }
 //_____________________________________________________________________________
-Float_t 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;
@@ -38,17 +52,36 @@ Float_t ZFromCol300(Int_t col) {
   return z;
 }
 //_____________________________________________________________________________
-Float_t ZpitchFromCol300(Int_t col) {
+Float_t AliITSsegmentationSPD::ZpitchFromCol300(Int_t col) const {
   // returns Z pixel pitch for 300 micron pixels.
-  return 300.0;
+
+    col = 0; // done to remove unused variable warning.
+    return 300.0;
 }
 //_____________________________________________________________________________
-Float_t ColFromZ(Float_t z) {
-// 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 
-// extra pixels in z direction 
-
+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 
+    // extra pixels in z direction 
+    Int_t i;
+    Float_t s,col;
+
+    if(z<0||z>fDz){
+	Error("ColFromZ","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
+    s -= fCellSizeZ[i];
+    col = (Float_t) i + (z-s)/fCellSizeZ[i];
+    return col;
+
+/*
   Float_t col = 0;
   Float_t pitchz = 425;
   if( z < 13175) {
@@ -79,14 +112,26 @@ Float_t ColFromZ(Float_t z) {
   } else if( z < 83600) {  
     col = 161 + (z - 70425)/pitchz;
   }   
-  return col;
+  return TMath::Abs(col);*/
 }
 
 //_____________________________________________________________________________
-Float_t ZFromCol(Int_t col) {
-// same comments as above
-// Get z-coordinate for each colunm number
-
+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);
+	return 0.0; // error
+    } // end if outsize of detector
+    z = 0.0;
+    for(i=0;i<col;i++) z += fCellSizeZ[i];
+    z += 0.5*fCellSizeZ[col];
+    return z;
+
+/* 
   Float_t pitchz = 425;
   Float_t z = 0;
   if( col >=0 && col <= 30 ) {  
@@ -116,81 +161,94 @@ Float_t ZFromCol(Int_t col) {
     z = 69175 + (col -159 + 0.5)*pitchz;    
   } else if( col >= 161 && col <= 191) {  
     z = 70425 + (col -161 + 0.5)*pitchz;    
-  }   
+  }
 
-  return z;
+  return z;*/
 }
-
-Float_t ZpitchFromCol(Int_t col) {
-// Get pitch size in z direction for each colunm
-
-  Float_t pitchz = 425;
-  if( col >=32 && col <= 33 ) {  
-    pitchz = 625;
-  } else if( col >= 64 && col <= 65) {  
-    pitchz = 625;
-  } else if( col >= 96 && col <= 97) {  
-    pitchz = 625;
-  } else if( col >= 128 && col <= 129) {  
-    pitchz = 625;
-  } else if( col >= 160 && col <= 161) {  
-    pitchz = 625;
-  }   
-  return pitchz;
+//______________________________________________________________________
+Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) const {
+    // Get pitch size in z direction for each colunm
+
+   Float_t pitchz = 425.;
+    if(col < 0){
+	pitchz = 0.0;
+    } else if(col >=  31 && col <=  32) {
+	pitchz = 625.;
+    } else if(col >=  63 && col <=  64) {
+	pitchz = 625.;
+    } else if(col >=  95 && col <=  96) {
+	pitchz = 625.;
+    } else if(col >= 127 && col <= 128) {
+	pitchz = 625.;
+    } else if(col >= 159 && col <= 160) {
+	pitchz = 625.;
+    } else if(col>=192){
+	pitchz = 425.;
+    }
+    return pitchz;
 }
-
-AliITSsegmentationSPD::AliITSsegmentationSPD(){
-  // Default constructor
-   fNpx = 0;
-   fNpz = 0;
-   fCorr=0;
-   fGeom = 0;
-
-}
-//____________________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm){
+//______________________________________________________________________
+AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm):
+fNpx(0),
+fNpz(0){
   // Constructor
    fCorr=0;
-   fNpx = 0;
-   fNpz = 0;
    Init(); 
    fGeom = gm;
 
 }
-//____________________________________________________________________________
-AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(AliITSsegmentationSPD &source){
+//______________________________________________________________________
+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=(const AliITSsegmentationSPD &source){
    // = operator
-   Int_t i;
    if(this==&source) return *this;
-   this->fNpx  = source.fNpx;
-   this->fNpz  = source.fNpz;
-   this->fDx   = source.fDx;
-   this->fDy   = source.fDy;
-   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){
   // copy constructor
-   *this = source;
+  source.Copy(*this);
 }
-//------------------------------
+//----------------------------------------------------------------------
+void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){
+    // Fills the array of pixel sizes in x, microns
+    // The input array x must have 256 elements.
+    Int_t i;
+
+    for(i=0;i<256;i++) fCellSizeX[i] = x[i];
+    for(i=0;i<280;i++) fCellSizeZ[i] = z[i];
+    return;
+}
+//----------------------------------------------------------------------
 void AliITSsegmentationSPD::Init300(){
 // Initialize infromation for 6 read out chip 300X50 micron pixel SPD 
 // detectors. This chip is 150 microns thick by 1.28 cm in x by 8.37 cm
 // long. It has 256  50 micron pixels in x and 279 300 micron size
 // pixels in z.
 
-    Int_t i;
     //const Float_t kconv=10000.;
+    Int_t i;
     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] = ZpitchFromCol300(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;
@@ -205,23 +263,23 @@ void AliITSsegmentationSPD::Init(){
 // 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.
 
-    Int_t i;
     //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
+    for(i=0;i<280;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);
+    //printf(" AliITSsegmentationSPD - Init: fNpx fNpz fDx fDz %d %d %f %f\n",fNpx, fNpz, fDx, fDz);
 
 }
 //------------------------------
-void AliITSsegmentationSPD::SetNCells(Int_t p1, Int_t p2){
+void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){
   // for SPD this function should be used ONLY when a beam test setup 
   // configuration is studied
 
@@ -229,28 +287,21 @@ void AliITSsegmentationSPD::SetNCells(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){
-   //returs x pixel pitch for a give pixel
-   return fCellSizeX[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){
-  // returns z pixel pitch for a give pixel
-   return ZpitchFromCol(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::GetCellIxz(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)
 //
 
@@ -262,12 +313,9 @@ void AliITSsegmentationSPD::GetCellIxz(Float_t &x,Float_t &z,Int_t &ix,Int_t &iz
     // different segmentation on z
     iz = (Int_t)(ColFromZ(z) + 1);
 
-    x /= dpx;
-    z = ColFromZ(z);
 
     if (iz >  fNpz) iz= fNpz;
     if (ix >  fNpx) ix= fNpx;
-
     /*
     if (iz < -fNpz) iz= -fNpz;
     if (ix < -fNpx) ix=-fNpx;
@@ -275,7 +323,21 @@ void AliITSsegmentationSPD::GetCellIxz(Float_t &x,Float_t &z,Int_t &ix,Int_t &iz
 }
 
 //------------------------------
-void AliITSsegmentationSPD::GetCellCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z){
+void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z) const{
+//  local transformation of real local coordinates (x,z)
+//
+
+    // expects x, z in microns
+
+    // same segmentation on x
+    Float_t dpx=Dpx(0);
+
+    x /= dpx;
+    z = ColFromZ(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
@@ -289,7 +351,7 @@ void AliITSsegmentationSPD::GetCellCxz(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;
@@ -318,3 +380,113 @@ Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){
     Xlist[7]=iX+1;
     Zlist[7]=iZ-1;
 }
+//______________________________________________________________________
+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.
+
+    dx = -0.5*kconv*Dx();
+    dz = -0.5*kconv*Dz();
+    ix = -1;
+    iz = -1;
+    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 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 kFALSE; // outside z range.
+    ix = i;
+    iz = j;
+    return kTRUE; // Found ix and iz, return.
+}
+//______________________________________________________________________
+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).
+// 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:
+// 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.
+// If ix and or iz is outside of the segmentation range a value of -0.5*Dx()
+// or -0.5*Dz() is returned.
+    Int_t i,j;
+    const Float_t kconv = 1.0E-04; // converts microns to cm.
+
+    x = -0.5*kconv*Dx(); // default value.
+    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
+    x += 0.5*kconv*fCellSizeX[ix]; // add 1/2 of cell ix for center location.
+    for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1
+    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.
+}