--- /dev/null
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+/* $Id$ */
+
+///////////////////////////////////////////////////////////////////////
+// ITS geometry manipulation routines. //
+// Created April 15 1999. //
+// version: 0.0.0 //
+// By: Bjorn S. Nilsen //
+// version: 0.0.1 //
+// Updated May 27 1999. //
+// Added Cylindrical random and global based changes. //
+// //
+// Modified and added functions Feb. 7 2006 //
+///////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////////
+// The local coordinate system by, default, is show in the following
+// figures. Also shown are the ladder numbering scheme.
+//Begin_Html
+/*
+<img src="picts/ITS/AliITSgeomMatrix_L1.gif">
+</pre>
+<br clear=left>
+<font size=+2 color=blue>
+<p>This shows the relative geometry differences between the ALICE Global
+coordinate system and the local detector coordinate system.
+</font>
+<pre>
+
+<pre>
+<img src="picts/ITS/its1+2_convention_front_5.gif">
+</pre>
+<br clear=left>
+<font size=+2 color=blue>
+<p>This shows the front view of the SPDs and the orientation of the local
+pixel coordinate system. Note that the inner pixel layer has its y coordinate
+in the opposite direction from all of the other layers.
+</font>
+<pre>
+
+<pre>
+<img src="picts/ITS/its3+4_convention_front_5.gif">
+</pre>
+<br clear=left>
+<font size=+2 color=blue>
+<p>This shows the front view of the SDDs and the orientation of the local
+pixel coordinate system.
+</font>
+<pre>
+
+<pre>
+<img src="picts/ITS/its5+6_convention_front_5.gif">
+</pre>
+<br clear=left>
+<font size=+2 color=blue>
+<p>This shows the front view of the SSDs and the orientation of the local
+pixel coordinate system.
+</font>
+<pre>
+*/
+//End_Html
+//
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+//
+// version: 0
+// Written by Bjorn S. Nilsen
+//
+// Data Members:
+//
+// TString fVersion
+// Transformation version.
+// Int_t fTrans
+// Flag to keep track of which transformation
+// Int_t fNmodules
+// The total number of modules
+// Int_t fNlayers
+// The number of ITS layers for this geometry. By default this
+// is 6, but can be modified by the creator function if there are
+// more layers defined.
+//
+// TArrayI fNlad
+// A pointer to an array fNlayers long containing the number of
+// ladders for each layer. This array is typically created and filled
+// by the AliITSgeom creator function.
+//
+// TArrayI fNdet
+// A pointer to an array fNlayers long containing the number of
+// active detector volumes for each ladder. This array is typically
+// created and filled by the AliITSgeom creator function.
+//
+// TObjArray fGm containing objects of type AliITSgeomMatrix
+// A pointer to an array of AliITSgeomMatrix classes. One element
+// per module (detector) in the ITS. AliITSgeomMatrix basicly contains
+// all of the necessary information about the detector and it's coordinate
+// transformations.
+//
+////////////////////////////////////////////////////////////////////////
+#include <Riostream.h>
+#include <ctype.h>
+
+#include <TRandom.h>
+#include <TSystem.h>
+#include <TArrayI.h>
+
+#include "AliITSgeom.h"
+#include "AliLog.h"
+
+ClassImp(AliITSgeom)
+
+//______________________________________________________________________
+AliITSgeom::AliITSgeom():
+TObject(),
+fVersion("GEANT"),// Transformation version.
+fTrans(0), // Flag to keep track of which transformation
+fNmodules(0), // The total number of modules
+fNlayers(0), // The number of layers.
+fNlad(), //[] Array of the number of ladders/layer(layer)
+fNdet(), //[] Array of the number of detector/ladder(layer)
+fGm(0,0) // Structure of translation. and rotation.
+{
+ // The default constructor for the AliITSgeom class. It, by default,
+ // sets fNlayers to zero and zeros all pointers.
+ // Do not allocate anything zero everything.
+ // Inputs:
+ // none.
+ // Outputs:
+ // none.
+ // Return:
+ // a zeroed AliITSgeom object.
+
+ fGm.SetOwner(kTRUE);
+ return;
+}
+
+//______________________________________________________________________
+AliITSgeom::AliITSgeom(Int_t itype,Int_t nlayers,const Int_t *nlads,
+ const Int_t *ndets,Int_t mods):
+TObject(),
+fVersion("GEANT"), // Transformation version.
+fTrans(itype), // Flag to keep track of which transformation
+fNmodules(mods), // The total number of modules
+fNlayers(nlayers), // The number of layers.
+fNlad(nlayers,nlads),//[] Array of the number of ladders/layer(layer)
+fNdet(nlayers,ndets),//[] Array of the number of detector/ladder(layer)
+fGm(mods,0) // Structure of translation. and rotation.
+{
+ // A simple constructor to set basic geometry class variables
+ // Inputs:
+ // Int_t itype the type of transformation kept.
+ // bit 0 => Standard GEANT
+ // bit 1 => ITS tracking
+ // bit 2 => A change in the coordinate system
+ // has been made. others are still to be defined
+ // as needed.
+ // Int_t nlayers The number of ITS layers also set the size of
+ // the arrays
+ // Int_t *nlads an array of the number of ladders for each
+ // layer. This array must be nlayers long.
+ // Int_t *ndets an array of the number of detectors per ladder
+ // for each layer. This array must be nlayers long.
+ // Int_t mods The number of modules. Typically the sum of all the
+ // detectors on every layer and ladder.
+ // Outputs:
+ // none
+ // Return:
+ // A properly inilized AliITSgeom object.
+
+ fGm.SetOwner(kTRUE);
+ return;
+}
+//______________________________________________________________________
+void AliITSgeom::Init(Int_t itype,Int_t nlayers,const Int_t *nlads,
+ const Int_t *ndets,Int_t mods){
+ // A simple Inilizer to set basic geometry class variables
+ // Inputs:
+ // Int_t itype the type of transformation kept.
+ // bit 0 => Standard GEANT
+ // bit 1 => ITS tracking
+ // bit 2 => A change in the coordinate system
+ // has been made. others are still to be defined
+ // as needed.
+ // Int_t nlayers The number of ITS layers also set the size of
+ // the arrays
+ // Int_t *nlads an array of the number of ladders for each
+ // layer. This array must be nlayers long.
+ // Int_t *ndets an array of the number of detectors per ladder
+ // for each layer. This array must be nlayers long.
+ // Int_t mods The number of modules. Typically the sum of all the
+ // detectors on every layer and ladder.
+ // Outputs:
+ // none
+ // Return:
+ // A properly inilized AliITSgeom object.
+
+ fVersion = "GEANT"; // Transformation version.
+ fTrans = itype; // Flag to keep track of which transformation
+ fNmodules = mods; // The total number of modules
+ fNlayers = nlayers; // The number of layers.
+ fNlad.Set(nlayers,nlads);//[] Array of the number of ladders/layer(layer)
+ fNdet.Set(nlayers,ndets);//[] Array of the number of detector/ladder(layer)
+ fGm.Clear();
+ fGm.Expand(mods); // Structure of translation. and rotation.
+ fGm.SetOwner(kTRUE);
+ return;
+}
+//______________________________________________________________________
+void AliITSgeom::CreateMatrix(Int_t mod,Int_t lay,Int_t lad,Int_t det,
+ AliITSDetector idet,const Double_t tran[3],
+ const Double_t rot[10]){
+ // Given the translation vector tran[3] and the rotation matrix rot[1],
+ // this function creates and adds to the TObject Array fGm the
+ // AliITSgeomMatrix object.
+ // The rot[10] matrix is set up like:
+ /* / rot[0] rot[1] rot[2] \
+ // | rot[3] rot[4] rot[5] |
+ // \ rot[6] rot[7] rot[8] / if(rot[9]!=0) then the Identity matrix
+ // is used regardless of the values in rot[0]-rot[8].
+ */
+ // Inputs:
+ // Int_t mod The module number. The location in TObjArray
+ // Int_t lay The layer where this module is
+ // Int_t lad On which ladder this module is
+ // Int_t det Which detector on this ladder this module is
+ // AliITSDetector idet The type of detector see AliITSgeom.h
+ // Double_t tran[3] The translation vector
+ // Double_t rot[10] The rotation matrix.
+ // Outputs:
+ // none
+ // Return:
+ // none.
+ Int_t id[3];
+ Double_t r[3][3] = {{1.0,0.0,0.0},{0.0,1.0,0.0},{0.0,0.0,1.0}};
+
+ if(mod<0||mod>=fGm.GetSize()){
+ Error("CreateMatrix","mod=%d is out of bounds max value=%d",mod,
+ fGm.GetSize());
+ return;
+ } // end if
+ delete fGm.At(mod);
+ id[0] = lay; id[1] = lad; id[2] = det;
+ if(rot[9]!=0.0) { // null rotation
+ r[0][0] = rot[0]; r[0][1] = rot[1]; r[0][2] = rot[2];
+ r[1][0] = rot[3]; r[1][1] = rot[4]; r[1][2] = rot[5];
+ r[2][0] = rot[6]; r[2][1] = rot[7]; r[2][2] = rot[8];
+ } // end if
+ fGm.AddAt(new AliITSgeomMatrix(idet,id,r,tran),mod);
+}
+//______________________________________________________________________
+AliITSgeom::~AliITSgeom(){
+ // The destructor for the AliITSgeom class. If the arrays fNlad,
+ // fNdet, or fGm have had memory allocated to them, there pointer values
+ // are non zero, then this memory space is freed and they are set
+ // to zero. In addition, fNlayers is set to zero. The destruction of
+ // Inputs:
+ // none.
+ // Outputs:
+ // none.
+ // Return:
+ // none.
+
+ return;
+}
+//______________________________________________________________________
+AliITSgeom::AliITSgeom(const AliITSgeom &source) :
+TObject(source),
+fVersion(source.fVersion), // Transformation version.
+fTrans(source.fTrans), // Flag to keep track of which transformation
+fNmodules(source.fNmodules),// The total number of modules
+fNlayers(source.fNlayers), // The number of layers.
+fNlad(source.fNlad), // Array of the number of ladders/layer(layer)
+fNdet(source.fNdet), // Array of the number of detector/ladder(layer)
+fGm(source.fGm.GetSize(),source.fGm.LowerBound())// Structure of
+ // translation and rotation.
+{
+ // The copy constructor for the AliITSgeom class. It calls the
+ // = operator function. See the = operator function for more details.
+ // Inputs:
+ // AliITSgeom &source The AliITSgeom class with which to make this
+ // a copy of.
+ // Outputs:
+ // none.
+ // Return:
+ // none.
+ Int_t i,n;
+
+ n = source.fGm.GetLast()+1;
+ for(i=source.fGm.LowerBound();i<n;i++){
+ fGm.AddAt(new AliITSgeomMatrix(*((AliITSgeomMatrix*)(
+ source.fGm.At(i)))),i);
+ } // end for i
+ fGm.SetOwner(kTRUE);
+ return;
+}
+//______________________________________________________________________
+AliITSgeom& AliITSgeom::operator=(const AliITSgeom &source){
+ // The = operator function for the AliITSgeom class. It makes an
+ // independent copy of the class in such a way that any changes made
+ // to the copied class will not affect the source class in any way.
+ // This is required for many ITS alignment studies where the copied
+ // class is then modified by introducing some misalignment.
+ // Inputs:
+ // AliITSgeom &source The AliITSgeom class with which to make this
+ // a copy of.
+ // Outputs:
+ // none.
+ // Return:
+ // *this The a new copy of source.
+ Int_t i;
+
+ if(this == &source) return *this; // don't assign to ones self.
+
+ // if there is an old structure allocated delete it first.
+ this->fGm.Clear();
+
+ this->fVersion = source.fVersion;
+ this->fTrans = source.fTrans;
+ this->fNmodules = source.fNmodules;
+ this->fNlayers = source.fNlayers;
+ this->fNlad = source.fNlad;
+ this->fNdet = source.fNdet;
+ this->fGm.Expand(this->fNmodules);
+ for(i=source.fGm.LowerBound();i<source.fGm.GetLast();i++){
+ fGm.AddAt(new AliITSgeomMatrix(*((AliITSgeomMatrix*)(
+ source.fGm.At(i)))),i);
+ } // end for i
+ fGm.SetOwner(kTRUE);
+ return *this;
+}
+//______________________________________________________________________
+Int_t AliITSgeom::GetModuleIndex(Int_t lay,Int_t lad,Int_t det)const{
+ // This routine computes the module index number from the layer,
+ // ladder, and detector numbers. The number of ladders and detectors
+ // per layer is determined when this geometry package is constructed,
+ // see AliITSgeom(const char *filename) for specifics.
+ // Inputs:
+ // Int_t lay The layer number. Starting from 1.
+ // Int_t lad The ladder number. Starting from 1.
+ // Int_t det The detector number. Starting from 1.
+ // Outputs:
+ // none.
+ // Return:
+ // the module index number, starting from zero.
+ Int_t i,j,k,id[3];
+
+ i = fNdet[lay-1] * (lad-1) + det - 1;
+ j = 0;
+ for(k=0;k<lay-1;k++) j += fNdet[k]*fNlad[k];
+ i = i+j;
+ if(i>=fNmodules) return -1;
+ GetGeomMatrix(i)->GetIndex(id);
+ if(id[0]==lay&&id[1]==lad&&id[2]==det) return i;
+ // Array of modules fGm is not in expected order. Search for this index
+ for(i=0;i<fNmodules;i++){
+ GetGeomMatrix(i)->GetIndex(id);
+ if(id[0]==lay&&id[1]==lad&&id[2]==det) return i;
+ } // end for i
+ // This layer ladder and detector combination does not exist return -1.
+ return -1;
+}
+//______________________________________________________________________
+void AliITSgeom::GetModuleId(Int_t index,Int_t &lay,Int_t &lad,Int_t &det)
+const{
+ // This routine computes the layer, ladder and detector number
+ // given the module index number. The number of ladders and detectors
+ // per layer is determined when this geometry package is constructed,
+ // see AliITSgeom(const char *filename) for specifics.
+ // Inputs:
+ // Int_t index The module index number, starting from zero.
+ // Outputs:
+ // Int_t lay The layer number. Starting from 1.
+ // Int_t lad The ladder number. Starting from 1.
+ // Int_t det The detector number. Starting from 1.
+ // Return:
+ // none.
+ Int_t id[3];
+ AliITSgeomMatrix *g = GetGeomMatrix(index);
+
+ if (g == 0x0){
+ Error("GetModuleId","Can not get GeoMatrix for index = %d",index);
+ lay = -1; lad = -1; det = -1;
+ }else{
+ g->GetIndex(id);
+ lay = id[0]; lad = id[1]; det = id[2];
+ }// End if
+ return;
+ // The old way kept for posterity.
+/*
+ Int_t i,j,k;
+ j = 0;
+ for(k=0;k<fNlayers;k++){
+ j += fNdet[k]*fNlad[k];
+ if(j>index)break;
+ } // end for k
+ lay = k+1;
+ i = index -j + fNdet[k]*fNlad[k];
+ j = 0;
+ for(k=0;k<fNlad[lay-1];k++){
+ j += fNdet[lay-1];
+ if(j>i)break;
+ } // end for k
+ lad = k+1;
+ det = 1+i-fNdet[lay-1]*k;
+ return;
+*/
+}
+//______________________________________________________________________
+Int_t AliITSgeom::GetNDetTypes(Int_t &max)const{
+ // Finds and returns the number of detector types used and the
+ // maximum detector type value. Only counts id >=0 (no undefined
+ // values. See AliITSgeom.h for list of AliITSDetecor enumerated types.
+ // Inputs:
+ // none.
+ // Outputs:
+ // The maximum detector type used
+ // Return:
+ // The number of detector types used
+ Int_t i,*n,id;
+
+ max = -1;
+ for(i=0;i<GetIndexMax();i++){
+ id = GetModuleType(i);
+ if(id>max) max=id;
+ } // end for i
+ n = new Int_t[max+1];
+ for(i=0;i<max;i++) n[i] = 0;
+ for(i=0;i<GetIndexMax();i++){
+ id = GetModuleType(i);
+ if(id>-1)n[id]++; // note id=-1 => undefined.
+ } // end for i
+ id = 0;
+ for(i=0;i<max;i++) if(n[i]!=0) id++;
+ delete[] n;
+ return id+1;
+}
+//______________________________________________________________________
+Int_t AliITSgeom::GetNDetTypes(TArrayI &maxs,AliITSDetector *types)const{
+ // Finds and returns the number of detector types used and the
+ // number of each detector type. Only counts id >=0 (no undefined
+ // values. See AliITSgeom.h for list of AliITSDetecor enumerated types.
+ // Inputs:
+ // none.
+ // Outputs:
+ // The maximum detector type used
+ // Return:
+ // The number of detector types used
+ Int_t i,j,*n,id,max;
+
+ max = -1;
+ for(i=0;i<GetIndexMax();i++){
+ id = GetModuleType(i);
+ if(id>max) max=id;
+ } // end for i
+ n = new Int_t[max+1];
+ for(i=0;i<max;i++) n[i] = 0;
+ for(i=0;i<GetIndexMax();i++){
+ id = GetModuleType(i);
+ if(id>-1)n[id]++; // note id=-1 => undefined.
+ } // end for i
+ id = 0;
+ for(i=0;i<=max;i++) if(n[i]!=0) id++;
+ maxs.Set(id);
+ j = 0;
+ for(i=0;i<=max;i++) if(n[i]!=0){
+ maxs[j] = n[i];
+ types[j++] = (AliITSDetector) i;
+ } // end for i/end if
+ delete[] n;
+ return id;
+}
+//______________________________________________________________________
+Int_t AliITSgeom::GetStartDet(Int_t dtype)const{
+ // returns the starting module index value for a give type of detector id.
+ // This assumes that the detector types are different on different layers
+ // and that they are not mixed up.
+ // Inputs:
+ // Int_t dtype A detector type number. 0 for SPD, 1 for SDD,
+ // and 2 for SSD.
+ // Outputs:
+ // none.
+ // Return:
+ // the module index for the first occurrence of that detector type.
+
+ switch(dtype){
+ case 0:
+ return GetModuleIndex(1,1,1);
+ break;
+ case 1:
+ return GetModuleIndex(3,1,1);
+ break;
+ case 2:
+ return GetModuleIndex(5,1,1);
+ break;
+ default:
+ Warning("GetStartDet","undefined detector type %d",dtype);
+ return 0;
+ } // end switch
+
+ Warning("GetStartDet","undefined detector type %d",dtype);
+ return 0;
+}
+//______________________________________________________________________
+Int_t AliITSgeom::GetLastDet(Int_t dtype)const{
+ // returns the last module index value for a give type of detector id.
+ // This assumes that the detector types are different on different layers
+ // and that they are not mixed up.
+ // Inputs:
+ // Int_t dtype A detector type number. 0 for SPD, 1 for SDD,
+ // and 2 for SSD.
+ // Outputs:
+ // Return:
+ // the module index for the last occurrence of that detector type.
+
+ switch((AliITSDetector)dtype){
+ case kSPD:
+ return GetModuleIndex(3,1,1)-1;
+ break;
+ case kSDD:
+ return GetModuleIndex(5,1,1)-1;
+ break;
+ case kSSD:
+ return GetIndexMax()-1;
+ break;
+ case kSSDp: case kSDDp: case kND:
+ default:
+ Warning("GetLastDet","undefined detector type %d",dtype);
+ return 0;
+ } // end switch
+
+ Warning("GetLastDet","undefined detector type %d",dtype);
+ return 0;
+}
+
+//______________________________________________________________________
+void AliITSgeom::PrintData(FILE *fp,Int_t lay,Int_t lad,Int_t det)const{
+ // This function prints out the coordinate transformations for
+ // the particular detector defined by layer, ladder, and detector
+ // to the file pointed to by the File pointer fp. fprintf statements
+ // are used to print out the numbers. The format is
+ // layer ladder detector Trans= fx0 fy0 fz0 rot= frx fry frz
+ // Shape=fShapeIndex
+ // dfr= fr[0] fr[1] fr[2]
+ // dfr= fr[3] fr[4] fr[5]
+ // dfr= fr[6] fr[7] fr[8]
+ // By indicating which detector, some control over the information
+ // is given to the user. The output it written to the file pointed
+ // to by the file pointer fp. This can be set to stdout if you want.
+ // Inputs:
+ // FILE *fp A file pointer to an opened file for
+ // writing in which the results of the
+ // comparison will be written.
+ // Int_t lay The layer number. Starting from 1.
+ // Int_t lad The ladder number. Starting from 1.
+ // Int_t det The detector number. Starting from 1.
+ // Outputs:
+ // none
+ // Return:
+ // none.
+ AliITSgeomMatrix *gt;
+ Double_t t[3],r[3],m[3][3];
+
+ gt = this->GetGeomMatrix(GetModuleIndex(lay,lad,det));
+ gt->GetTranslation(t);
+ gt->GetAngles(r);
+ fprintf(fp,"%1.1d %2.2d %2.2d Trans=%f %f %f rot=%f %f %f Shape=%d\n",
+ lay,lad,det,t[0],t[1],t[2],r[0],r[1],r[2],
+ gt->GetDetectorIndex());
+ gt->GetMatrix(m);
+ fprintf(fp," dfr= %e %e %e\n",m[0][0],m[0][1],m[0][2]);
+ fprintf(fp," dfr= %e %e %e\n",m[1][0],m[1][1],m[1][2]);
+ fprintf(fp," dfr= %e %e %e\n",m[2][0],m[2][1],m[2][2]);
+ return;
+}
+
+//______________________________________________________________________
+Int_t AliITSgeom::GetNearest(const Double_t g[3],Int_t lay)const{
+ // Finds the Detector (Module) that is nearest the point g [cm] in
+ // ALICE Global coordinates. If layer !=0 then the search is restricted
+ // to Detectors (Modules) in that particular layer.
+ // Inputs:
+ // Double_t g[3] The ALICE Cartesian global coordinate from which the
+ // distance is to be calculated with.
+ // Int_t lay The layer to restrict the search to. If layer=0 then
+ // all layers are searched. Default is lay=0.
+ // Output:
+ // none.
+ // Return:
+ // The module number representing the nearest module.
+ Int_t i,l,a,e,in=0;
+ Double_t d,dn=1.0e10;
+ Bool_t t=lay!=0; // skip if lay = 0 default value check all layers.
+
+ for(i=0;i<fNmodules;i++){
+ if(t){GetModuleId(i,l,a,e);if(l!=lay) continue;}
+ if((d=GetGeomMatrix(i)->Distance2(g))<dn){
+ dn = d;
+ in = i;
+ } // end if
+ } // end for i
+ return in;
+}
+//______________________________________________________________________
+void AliITSgeom::GetNearest27(const Double_t g[3],Int_t n[27],Int_t lay)const{
+ // Finds 27 Detectors (Modules) that are nearest the point g [cm] in
+ // ALICE Global coordinates. If layer !=0 then the search is restricted
+ // to Detectors (Modules) in that particular layer. The number 27 comes
+ // from including the nearest detector and all those around it (up, down,
+ // left, right, forwards, backwards, and the corners).
+ // Input:
+ // Double_t g[3] The ALICE Cartesian global coordinate from which the
+ // distance is to be calculated with.
+ // Int_t lay The layer to restrict the search to. If layer=0 then
+ // all layers are searched. Default is lay=0.
+ // Output:
+ // Int_t n[27] The module number representing the nearest 27 modules
+ // in order.
+ // Return:
+ // none.
+ Int_t i,l,a,e,in[27]={0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,};
+ Double_t d,dn[27]={1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,
+ 1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,
+ 1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,
+ 1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,1.0e10,
+ 1.0e10,1.0e10,1.0e10};
+ Bool_t t=(lay!=0); // skip if lay = 0 default value check all layers.
+
+ for(i=0;i<fNmodules;i++){
+ if(t){GetModuleId(i,l,a,e);if(l!=lay) continue;}
+ for(a=0;a<27;a++){
+ d = GetGeomMatrix(i)->Distance2(g);
+ if(d<dn[a]){
+ for(e=26;e>a;e--){dn[e] = dn[e-1];in[e] = in[e-1];}
+ dn[a] = d; in[a] = i;
+ } // end if d<dn[i]
+ } // end for a
+ } // end for i
+ for(i=0;i<27;i++) n[i] = in[i];
+}
+//_______________________________________________________________________
+void AliITSgeom::DetLToTrackingV2(Int_t md,Float_t xin,Float_t zin,
+ Float_t &yout,Float_t &zout) const {
+
+ //Conversion from local coordinates on detectors to local
+ //coordinates used for tracking ("v2")
+ // Inputs:
+ // Int_t md Module number
+ // Float_t xin Standard local coordinate x
+ // Float_t zin Standard local coordinate z
+ // Output:
+ // Float_t yout Tracking local coordinate y
+ // Float_t zout Tracking local coordinate z
+ // Return:
+ // none.
+ Float_t x,y,z;
+ Double_t rt[9],al;
+
+ GetTrans(md,x,y,z);
+ GetRotMatrix(md,rt);
+ al = TMath::ATan2(rt[1],rt[0])+TMath::Pi();
+ yout = -(-xin+(x*((Float_t)TMath::Cos(al))+y*((Float_t)TMath::Sin(al))));
+ if(md<(GetModuleIndex(2,1,1))) yout *= -1;
+ zout = -zin+z;
+}
+//_______________________________________________________________________
+void AliITSgeom::TrackingV2ToDetL(Int_t md,Float_t yin,Float_t zin,
+ Float_t &xout,Float_t &zout) const {
+ //Conversion from local coordinates used for tracking ("v2") to
+ //local detector coordinates
+ // Inputs:
+ // Int_t md Module number
+ // Float_t yin Tracking local coordinate y
+ // Float_t zin Tracking local coordinate z
+ // Output:
+ // Float_t xout Standard local coordinate x
+ // Float_t zout Standard local coordinate z
+ // Return:
+ // none.
+ Float_t x,y,z;
+ Double_t rt[9],al;
+
+ GetTrans(md,x,y,z);
+ GetRotMatrix(md,rt);
+ al = TMath::ATan2(rt[1],rt[0])+TMath::Pi();
+ xout = yin;
+ if(md<(GetModuleIndex(2,1,1))) xout = -xout;
+ xout += (x*((Float_t)TMath::Cos(al))+y*((Float_t)TMath::Sin(al)));
+ zout = -zin+z;
+}
+//----------------------------------------------------------------------
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff