/**************************************************************************
* 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 *
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* 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. //
// Added function PrintComparison. //
///////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
// The local coordinate system by, default, is show in the following
// figures. Also shown are the ladder numbering scheme.
//Begin_Html
/*
This shows the relative geometry differences between the ALICE Global
coordinate system and the local detector coordinate system.
![]()
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.
![]()
This shows the front view of the SDDs and the orientation of the local pixel coordinate system.
![]()
This shows the front view of the SSDs and the orientation of the local pixel coordinate system.
*/ //End_Html // //////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////// // // version: 0 // Written by Bjorn S. Nilsen // // Data Members: // // 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. // // Int_t *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. // // Int_t *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. // // AliITSgeomMatrix *fGm // 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. // // TObjArray *fShape // A pointer to an array of TObjects containing the detailed shape // information for each type of detector used in the ITS. For example // I have created AliITSgeomSPD, AliITSgeomSDD, and AliITSgeomSSD as // example structures, derived from TObjects, to hold the detector // information. I would recommend that one element in each of these // structures, that which describes the shape of the active volume, // be one of the ROOT classes derived from TShape. In this way it would // be easy to have the display program display the correct active // ITS volumes. See the example classes AliITSgeomSPD, AliITSgeomSDD, // and AliITSgeomSSD for a more detailed example. //////////////////////////////////////////////////////////////////////// #include//#include //#include //#include //#include #include #include #include "AliITSgeom.h" #include "AliITSgeomSPD.h" #include "AliITSgeomSDD.h" #include "AliITSgeomSSD.h" ClassImp(AliITSgeom) //______________________________________________________________________ AliITSgeom::AliITSgeom(){ // The default constructor for the AliITSgeom class. It, by default, // sets fNlayers to zero and zeros all pointers. // Do not allocate anything zero everything. fTrans = 0; // standard GEANT global/local coordinate system. fNlayers = 0; fNlad = 0; fNdet = 0; fGm = 0; fShape = 0; strcpy(fVersion,"test"); return; } //______________________________________________________________________ AliITSgeom::AliITSgeom(Int_t itype,Int_t nlayers,Int_t *nlads,Int_t *ndets, Int_t mods){ // 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. Typicaly the sum of all the // detectors on every layer and ladder. // Outputs: // none Int_t i; fTrans = itype; fNlayers = nlayers; fNlad = new Int_t[nlayers]; fNdet = new Int_t[nlayers]; for(i=0;i AddAt(0,i); strcpy(fVersion,"test"); return; } //______________________________________________________________________ void AliITSgeom::CreatMatrix(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. // Inputs are: // 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 are: // none // 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]. */ 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(fGm->At(mod)!=0) 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 // TObjArray fShape is, by default, handled by the TObjArray destructor. if(fGm!=0){ //for(Int_t i=0;i At(i); fGm->Delete(); delete fGm; } // end if fGm!=0 if(fNlad!=0) delete[] fNlad; if(fNdet!=0) delete[] fNdet; fNlayers = 0; fNlad = 0; fNdet = 0; fGm = 0; return; } //______________________________________________________________________ void AliITSgeom::ReadNewFile(const char *filename){ // It is generaly preferred to define the geometry in AliITSgeom // directly from the GEANT geometry, see AliITSvPPRasymm.cxx for // and example. Under some circumstances this may not be possible. // This function will read in a formatted file for all of the // information needed to define the geometry in AliITSgeom. // Unlike the older file format, this file may contain comments // and the order of the data does not need to be completely // respected. A file can be created using the function WriteNewFile // defined below. // Inputs are: // const char *filename The file name of the file to be read in. // Outputs are: // none Int_t ncmd=9; const char *cmda[]={"Version" ,"fTrans" ,"fNmodules", "fNlayers" ,"fNladers","fNdetectors", "fNDetectorTypes","fShape" ,"Matrix"}; Int_t i,j,lNdetTypes,ldet; char cmd[20],c; AliITSgeomSPD *spd=0; AliITSgeomSDD *sdd=0; AliITSgeomSSD *ssd=0; AliITSgeomMatrix *m=0; ifstream *fp=0; char *filtmp=0; filtmp = gSystem->ExpandPathName(filename); cout << "AliITSgeom, Reading New .det file " << filtmp << endl; fp = new ifstream(filtmp,ios::in); // open file to write while(fp->get(c)!=NULL){ // for ever loop if(c==' ') continue; // remove blanks if(c=='\n') continue; if(c=='#' || c=='!'){for(;fp->get(c)!=NULL,c!='\n';); continue;} if(c=='/'){ fp->get(c);{ if(c=='/'){for(;fp->get(c)!=NULL,c!='\n';);continue;} if(c=='*'){ NotYet: for(;fp->get(c)!=NULL,c!='*';); fp->get(c);{ if(c=='/') continue; goto NotYet; } // } // end if c=='*' } // end if second / } // end if first / fp->putback(c); *fp >> cmd; for(i=0;i > fVersion; break; case 1: // fTrans *fp >> fTrans; break; case 2: // fNModules *fp >> fNmodules; if(fGm!=0){ for(j=0;j GetEntriesFast();j++) delete fGm->At(j); delete fGm; } // end if fGm = new TObjArray(fNmodules,0); break; case 3: // fNlayers *fp >> fNlayers; if(fNlad!=0) delete fNlad; if(fNdet!=0) delete fNdet; fNlad = new Int_t[fNlayers]; fNdet = new Int_t[fNlayers]; break; case 4: // fNladers for(j=0;j > fNlad[j]; break; case 5: // fNdetectors for(j=0;j > fNdet[j]; break; case 6: // fNDetectorTypes *fp >> lNdetTypes; if(fShape!=0){ for(j=0;j GetEntriesFast();j++) delete fShape->At(j); delete fShape; } // end if fShape = new TObjArray(lNdetTypes,0); break; case 7: // fShape *fp >> ldet; if(fShape==0) fShape = new TObjArray(5,0); switch (ldet){ case kSPD : spd = new AliITSgeomSPD(); *fp >> *spd; ReSetShape(ldet,spd); spd = 0; break; case kSDD : case kSDDp: sdd = new AliITSgeomSDD(); *fp >> *sdd; ReSetShape(ldet,sdd); sdd = 0; break; case kSSD : case kSSDp : ssd = new AliITSgeomSSD(); *fp >> *ssd; ReSetShape(ldet,ssd); ssd = 0; break; default: Error("ReadNewFile","Unknown fShape type number=%d c=%c",ldet,c); for(;fp->get(c)==NULL,c!='\n';); // skip to end of line. break; } // end switch break; case 8: // Matrix *fp >> ldet; if(fGm==0) fGm = new TObjArray(2270,0); if(fGm->At(ldet)!=0) delete (fGm->At(ldet)); fGm->AddAt((TObject*)new AliITSgeomMatrix(),ldet); m = (AliITSgeomMatrix*) fGm->At(ldet); *fp >> *m; m = 0; break; default: Error("ReadNewFile","Data line i=%d c=%c",i,c); for(;fp->get(c)==NULL,c!='\n';); // skip this line break; } // end switch i } // end while delete fp; return; } //______________________________________________________________________ void AliITSgeom::WriteNewFile(const char *filename){ // Writes AliITSgeom, AliITSgeomMatrix, and the defined AliITSgeomS*D // classes to a file in a format that is more readable and commendable. // Inputs are: // const char *filename The file name of the file to be write to. // Outputs are: // none ofstream *fp; Int_t i; char *filtmp; filtmp = gSystem->ExpandPathName(filename); cout << "AliITSgeom, Writing New .det file " << filtmp << endl; fp = new ofstream(filtmp,ios::out); // open file to write *fp << "//Comment lines begin with two //, one #, or one !" << endl; *fp << "#Blank lines are skipped including /* and */ sections." << endl; *fp << "!and, in principle the order of the lines is not important" < GetEntriesFast() << endl; for(i=0;i GetEntriesFast();i++){ if(!IsShapeDefined(i)) continue; // only print out used shapes. switch (i){ case kSPD : *fp << "fShape " << (Int_t) kSPD << " "; *fp << *((AliITSgeomSPD*)(fShape->At(i))); break; case kSDD : *fp << "fShape " << (Int_t) kSDD << " "; *fp << *((AliITSgeomSDD*)(fShape->At(i))); break; case kSSD : case kSSDp : *fp << "fShape " << i << " "; *fp << *((AliITSgeomSSD*)(fShape->At(i))); break; default: Error("AliITSgeom::WriteNewFile","Unknown Shape value"); } // end switch (i) } // end for i for(i=0;i ExpandPathName(filename); cout << "AliITSgeom reading old .det file " << filtmp << endl; fShape = 0; strcpy(fVersion,"DefauleV5"); pf = fopen(filtmp,"r"); fNlayers = 6; // set default number of ladders TryAgain: fNlad = new Int_t[fNlayers]; fNdet = new Int_t[fNlayers]; fNmodules = 0; // find the number of ladders and detectors in this geometry. for(i=0;i lm) lm = l; if(l<1 || l>fNlayers) { printf("error in file %s layer=%d min. is 1 max is %d\n", filename,l,fNlayers); continue; }// end if l fNmodules++; if(l<=fNlayers&&fNlad[l-1]fNlayers){ delete[] fNlad; delete[] fNdet; fNlayers = lm; goto TryAgain; } // end if lm>fNlayers // counted the number of ladders and detectors now allocate space. fGm = new TObjArray(fNmodules,0); // Set up Shapes for a default configuration of 6 layers. fTrans = 0; // standard GEANT global/local coordinate system. // prepare to read in transforms lm = 0; // reuse lm as counter of modules. rewind(pf); // start over reading file while(fgets(buf,200,pf)!=NULL){ // for ever loop for(i=0;i<200;i++)if(buf[i]!=' '){ // remove blank spaces. buff = &(buf[i]); break; } // end for i // remove blank lines and comments. if(buff[0]=='\n'||buff[0]=='#'||buff[0]=='!'|| (buff[0]=='/'&&buff[1]=='/')) continue; x = y = z = o = p = q = r = s = t = 0.0; sscanf(buff,"%d %d %d %f %f %f %f %f %f %f %f %f", &l,&a,&d,&x,&y,&z,&o,&p,&q,&r,&s,&t); if(l<1 || l>fNlayers) { printf("error in file %s layer=%d min. is 1 max is %d/n", filename,l,fNlayers); continue; }// end if l id[0] = l;id[1] = a;id[2] = d; tran[0] = tran[1] = tran[2] = 0.0; tran[0] = (Double_t)x;tran[1] = (Double_t)y;tran[2] = (Double_t)z; rot6[0] = rot6[1] = rot6[2] = rot6[3] = rot6[4] = rot6[5] =0.0; rot6[0] = (Double_t)o;rot6[1] = (Double_t)p;rot6[2] = (Double_t)q; rot6[3] = (Double_t)r;rot6[4] = (Double_t)s;rot6[5] = (Double_t)t; switch (l){ case 1: case 2: // layer 1 or2 SPD fGm->AddAt(new AliITSgeomMatrix(rot6,kSPD,id,tran),lm++); break; case 3: case 4: // layer 3 or 4 SDD fGm->AddAt(new AliITSgeomMatrix(rot6,kSDD,id,tran),lm++); break; case 5: case 6: // layer 5 or 6 SSD fGm->AddAt(new AliITSgeomMatrix(rot6,kSSD,id,tran),lm++); break; } // end switch } // end while ever loop fclose(pf); } //______________________________________________________________________ AliITSgeom::AliITSgeom(const AliITSgeom &source) : TObject(source){ // The copy constructor for the AliITSgeom class. It calls the // = operator function. See the = operator function for more details. // Inputs are: // AliITSgeom &source The AliITSgeom class with which to make this // a copy of. // Outputs are: // none. *this = source; // Just use the = operator for now. 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 are: // AliITSgeom &source The AliITSgeom class with which to make this // a copy of. // Outputs are: // 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. if(this->fGm != 0){ for(i=0;i fNmodules;i++) delete this->fGm->At(i); delete this->fGm; } // end if fGm != 0 if(fNlad != 0) delete[] fNlad; if(fNdet != 0) delete[] fNdet; this->fTrans = source.fTrans; this->fNmodules = source.fNmodules; this->fNlayers = source.fNlayers; this->fNlad = new Int_t[fNlayers]; for(i=0;i fNlayers;i++) this->fNlad[i] = source.fNlad[i]; this->fNdet = new Int_t[fNlayers]; for(i=0;i fNlayers;i++) this->fNdet[i] = source.fNdet[i]; this->fShape = new TObjArray(*(source.fShape));//This does not make a proper copy. this->fGm = new TObjArray(this->fNmodules,0); for(i=0;i fNmodules;i++){ this->fGm->AddAt(new AliITSgeomMatrix(*( (AliITSgeomMatrix*)(source.fGm->At(i)))),i); } // end for i return *this; } //______________________________________________________________________ Int_t AliITSgeom::GetModuleIndex(Int_t lay,Int_t lad,Int_t det){ // 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 are: // 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 are: // 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 =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 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){ // 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 are: // Int_t index The module index number, starting from zero. // Outputs are: // 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. 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]; } return; // The old way kept for posterity. /* Int_t i,j,k; j = 0; for(k=0;k index)break; } // end for k lay = k+1; i = index -j + fNdet[k]*fNlad[k]; j = 0; for(k=0;k i)break; } // end for k lad = k+1; det = 1+i-fNdet[lay-1]*k; return; */ } //______________________________________________________________________ Int_t AliITSgeom::GetStartDet(Int_t dtype){ // 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 are: // Int_t dtype A detector type number. 0 for SPD, 1 for SDD, and 2 for SSD. // outputs: // return the module index for the first occurance 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){ // 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 are: // Int_t dtype A detector type number. 0 for SPD, 1 for SDD, and 2 for SSD. // outputs are: // return the module index for the last occurance of that detector type. switch(dtype){ case 0: return GetLastSPD(); break; case 1: return GetLastSDD(); break; case 2: return GetLastSSD(); break; default: Warning("GetLastDet","undefined detector type %d",dtype); return 0; } // end switch Warning("GetLastDet","undefined detector type %d",dtype); return 0; } //______________________________________________________________________ void AliITSgeom::PrintComparison(FILE *fp,AliITSgeom *other){ // This function was primarily created for diagnostic reasons. It // print to a file pointed to by the file pointer fp the difference // between two AliITSgeom classes. The format of the file is basicly, // define d? to be the difference between the same element of the two // classes. For example dfrx = this->GetGeomMatrix(i)->frx // - other->GetGeomMatrix(i)->frx. // if(at least one of dfx0, dfy0, dfz0,dfrx,dfry,dfrz are non zero) then // print layer ladder detector dfx0 dfy0 dfz0 dfrx dfry dfrz // if(at least one of the 9 elements of dfr[] are non zero) then print // layer ladder detector dfr[0] dfr[1] dfr[2] // dfr[3] dfr[4] dfr[5] // dfr[6] dfr[7] dfr[8] // Only non zero values are printed to save space. The differences are // typical written to a file because there are usually a lot of numbers // printed out and it is usually easier to read them in some nice editor // rather than zooming quickly past you on a screen. fprintf is used to // do the printing. The fShapeIndex difference is not printed at this time. // Inputs are: // FILE *fp A file pointer to an opened file for writing in which // the results of the comparison will be written. // AliITSgeom *other The other AliITSgeom class to which this one is // being compared. // outputs are: // none Int_t i,j,idt[3],ido[3]; Double_t tt[3],to[3]; // translation Double_t rt[3],ro[3]; // phi in radians Double_t mt[3][3],mo[3][3]; // matrixes AliITSgeomMatrix *gt,*go; Bool_t t; for(i=0;i fNmodules;i++){ gt = this->GetGeomMatrix(i); go = other->GetGeomMatrix(i); gt->GetIndex(idt); go->GetIndex(ido); t = kFALSE; for(i=0;i<3;i++) t = t&&idt[i]!=ido[i]; if(t) fprintf(fp,"%4.4d %1.1d %2.2d %2.2d %1.1d %2.2d %2.2d\n",i, idt[0],idt[1],idt[2],ido[0],ido[1],ido[2]); gt->GetTranslation(tt); go->GetTranslation(to); gt->GetAngles(rt); go->GetAngles(ro); t = kFALSE; for(i=0;i<3;i++) t = t&&tt[i]!=to[i]; if(t) fprintf(fp,"%1.1d %2.2d %2.2d dTrans=%f %f %f drot=%f %f %f\n", idt[0],idt[1],idt[2], tt[0]-to[0],tt[1]-to[1],tt[2]-to[2], rt[0]-ro[0],rt[1]-ro[1],rt[2]-ro[2]); t = kFALSE; gt->GetMatrix(mt); go->GetMatrix(mo); for(i=0;i<3;i++)for(j=0;j<3;j++) t = mt[i][j] != mo[i][j]; if(t){ fprintf(fp,"%1.1d %2.2d %2.2d dfr= %e %e %e\n", idt[0],idt[1],idt[2], mt[0][0]-mo[0][0],mt[0][1]-mo[0][1],mt[0][2]-mo[0][2]); fprintf(fp," dfr= %e %e %e\n", mt[1][0]-mo[1][0],mt[1][1]-mo[1][1],mt[1][2]-mo[1][2]); fprintf(fp," dfr= %e %e %e\n", mt[2][0]-mo[2][0],mt[2][1]-mo[2][1],mt[2][2]-mo[2][2]); } // end if t } // end for i return; } //______________________________________________________________________ void AliITSgeom::PrintData(FILE *fp,Int_t lay,Int_t lad,Int_t det){ // 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 are: // 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 are: // 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; } //______________________________________________________________________ ofstream & AliITSgeom::PrintGeom(ofstream &rb){ // Stream out an object of class AliITSgeom to standard output. // Intputs are: // ofstream &rb The output streaming buffer. // Outputs are: // ofstream &rb The output streaming buffer. Int_t i; rb.setf(ios::scientific); rb << fTrans << " "; rb << fNmodules << " "; rb << fNlayers << " "; for(i=0;i GetEntries()< GetEntries();i++) if(fShape->At(i)!=0) switch (i){ case kSPD: rb << kSPD <<","<< (AliITSgeomSPD*)(fShape->At(kSPD)); break; case kSDD: rb << kSDD <<","<< (AliITSgeomSDD*)(fShape->At(kSDD)); break; case kSSD: rb << kSSD <<","<< (AliITSgeomSSD*)(fShape->At(kSSD)); break; case kSSDp: rb << kSSDp <<","<< (AliITSgeomSSD*)(fShape->At(kSSDp)); break; case kSDDp: rb << kSDDp <<","<< (AliITSgeomSDD*)(fShape->At(kSDDp)); break; } // end for i / switch return rb; } //______________________________________________________________________ ifstream & AliITSgeom::ReadGeom(ifstream &rb){ // Stream in an object of class AliITSgeom from standard input. // Intputs are: // ifstream &rb The input streaming buffer. // Outputs are: // ifstream &rb The input streaming buffer. Int_t i,j; fNlad = new Int_t[fNlayers]; fNdet = new Int_t[fNlayers]; if(fGm!=0){ for(i=0;i > fTrans >> fNmodules >> fNlayers; fNlad = new Int_t[fNlayers]; fNdet = new Int_t[fNlayers]; for(i=0;i > fNlad[i]; for(i=0;i > fNdet[i]; fGm = new TObjArray(fNmodules,0); for(i=0;i AddAt(new AliITSgeomMatrix,i); rb >> *(GetGeomMatrix(i)); } // end for i rb >> i; fShape = new TObjArray(i); for(i=0;i GetEntries();i++) { rb >> j; switch (j){ case kSPD:{ AliITSgeomSPD *s = new AliITSgeomSPD(); rb >> *s; fShape->AddAt(s,kSPD);} break; case kSDD:{ AliITSgeomSDD *s = new AliITSgeomSDD(); rb >> *s; fShape->AddAt(s,kSDD);} break; case kSSD:{ AliITSgeomSSD *s = new AliITSgeomSSD(); rb >> *s; fShape->AddAt(s,kSSD);} break; case kSSDp:{ AliITSgeomSSD *s = new AliITSgeomSSD(); rb >> *s; fShape->AddAt(s,kSSDp);} break; case kSDDp:{ AliITSgeomSDD *s = new AliITSgeomSDD(); rb >> *s; fShape->AddAt(s,kSDDp);} break; } // end switch } // end for i return rb; } //______________________________________________________________________ // The following routines modify the transformation of "this" // geometry transformations in a number of different ways. //______________________________________________________________________ void AliITSgeom::GlobalChange(const Float_t *tran,const Float_t *rot){ // This function performs a Cartesian translation and rotation of // the full ITS from its default position by an amount determined by // the three element arrays tran and rot. If every element // of tran and rot are zero then there is no change made // the geometry. The change is global in that the exact same translation // and rotation is done to every detector element in the exact same way. // The units of the translation are those of the Monte Carlo, usually cm, // and those of the rotation are in radians. The elements of tran // are tran[0] = x, tran[1] = y, and tran[2] = z. // The elements of rot are rot[0] = rx, rot[1] = ry, and // rot[2] = rz. A change in x will move the hole ITS in the ALICE // global x direction, the same for a change in y. A change in z will // result in a translation of the ITS as a hole up or down the beam line. // A change in the angles will result in the inclination of the ITS with // respect to the beam line, except for an effective rotation about the // beam axis which will just rotate the ITS as a hole about the beam axis. // Intputs are: // Float_t *tran A 3 element array representing the global translations. // the elements are x,y,z in cm. // Float_t *rot A 3 element array representing the global rotation // angles about the three axis x,y,z in radians // Outputs are: // none. Int_t i,j; Double_t t[3],r[3]; AliITSgeomMatrix *g; fTrans = (fTrans && 0xfffd) + 2; // set bit 1 true. for(i=0;i GetGeomMatrix(i); g->GetTranslation(t); g->GetAngles(r); for(j=0;j<3;j++){ t[j] += tran[j]; r[j] += rot[j]; } // end for j g->SetTranslation(t); g->SetAngles(r); } // end for i return; } //______________________________________________________________________ void AliITSgeom::GlobalCylindericalChange(const Float_t *tran, const Float_t *rot){ // This function performs a cylindrical translation and rotation of // each ITS element by a fixed about in radius, rphi, and z from its // default position by an amount determined by the three element arrays // tran and rot. If every element of tran and // rot are zero then there is no change made the geometry. The // change is global in that the exact same distance change in translation // and rotation is done to every detector element in the exact same way. // The units of the translation are those of the Monte Carlo, usually cm, // and those of the rotation are in radians. The elements of tran // are tran[0] = r, tran[1] = rphi, and tran[2] = z. // The elements of rot are rot[0] = rx, rot[1] = ry, and // rot[2] = rz. A change in r will results in the increase of the // radius of each layer by the same about. A change in rphi will results in // the rotation of each layer by a different angle but by the same // circumferential distance. A change in z will result in a translation // of the ITS as a hole up or down the beam line. A change in the angles // will result in the inclination of the ITS with respect to the beam // line, except for an effective rotation about the beam axis which will // just rotate the ITS as a hole about the beam axis. // Intputs are: // Float_t *tran A 3 element array representing the global translations. // the elements are r,theta,z in cm/radians. // Float_t *rot A 3 element array representing the global rotation // angles about the three axis x,y,z in radians // Outputs are: // none. Int_t i,j; Double_t t[3],ro[3],r,r0,phi,rphi; AliITSgeomMatrix *g; fTrans = (fTrans && 0xfffd) + 2; // set bit 1 true. for(i=0;i GetGeomMatrix(i); g->GetTranslation(t); g->GetAngles(ro); r = r0= TMath::Hypot(t[1],t[0]); phi = TMath::ATan2(t[1],t[0]); rphi = r0*phi; r += tran[0]; rphi += tran[1]; phi = rphi/r0; t[0] = r*TMath::Cos(phi); t[1] = r*TMath::Sin(phi); t[2] += tran[2]; for(j=0;j<3;j++){ ro[j] += rot[j]; } // end for j g->SetTranslation(t); g->SetAngles(ro); } // end for i return; } //______________________________________________________________________ void AliITSgeom::RandomChange(const Float_t *stran,const Float_t *srot){ // This function performs a Gaussian random displacement and/or // rotation about the present global position of each active // volume/detector of the ITS. The sigma of the random displacement // is determined by the three element array stran, for the // x y and z translations, and the three element array srot, // for the three rotation about the axis x y and z. // Intputs are: // Float_t *stran A 3 element array representing the global translations // variances. The elements are x,y,z in cm. // Float_t *srot A 3 element array representing the global rotation // angles variances about the three axis x,y,z in radians. // Outputs are: // none. Int_t i,j; Double_t t[3],r[3]; AliITSgeomMatrix *g; fTrans = (fTrans && 0xfffd) + 2; // set bit 1 true. for(i=0;i GetGeomMatrix(i); g->GetTranslation(t); g->GetAngles(r); for(j=0;j<3;j++){ t[j] += gRandom->Gaus(0.0,stran[j]); r[j] += gRandom->Gaus(0.0, srot[j]); } // end for j g->SetTranslation(t); g->SetAngles(r); } // end for i return; } //______________________________________________________________________ void AliITSgeom::RandomCylindericalChange(const Float_t *stran, const Float_t *srot){ // This function performs a Gaussian random displacement and/or // rotation about the present global position of each active // volume/detector of the ITS. The sigma of the random displacement // is determined by the three element array stran, for the // r rphi and z translations, and the three element array srot, // for the three rotation about the axis x y and z. This random change // in detector position allow for the simulation of a random uncertainty // in the detector positions of the ITS. // Intputs are: // Float_t *stran A 3 element array representing the global translations // variances. The elements are r,theta,z in cm/readians. // Float_t *srot A 3 element array representing the global rotation // angles variances about the three axis x,y,z in radians. // Outputs are: // none. Int_t i,j; Double_t t[3],ro[3],r,r0,phi,rphi; TRandom ran; AliITSgeomMatrix *g; fTrans = (fTrans && 0xfffd) + 2; // set bit 1 true. for(i=0;i GetGeomMatrix(i); g->GetTranslation(t); g->GetAngles(ro); r = r0= TMath::Hypot(t[1],t[0]); phi = TMath::ATan2(t[1],t[0]); rphi = r0*phi; r += ran.Gaus(0.0,stran[0]); rphi += ran.Gaus(0.0,stran[1]); phi = rphi/r0; t[0] = r*TMath::Cos(phi); t[1] = r*TMath::Sin(phi); t[2] += ran.Gaus(0.0,stran[2]); for(j=0;j<3;j++){ ro[j] += ran.Gaus(0.0, srot[j]); } // end for j g->SetTranslation(t); g->SetAngles(ro); } // end for i return; } //______________________________________________________________________ void AliITSgeom::GeantToTracking(AliITSgeom &source){ // Copy the geometry data but change it to go between the ALICE // Global coordinate system to that used by the ITS tracking. A slightly // different coordinate system is used when tracking. This coordinate // system is only relevant when the geometry represents the cylindrical // ALICE ITS geometry. For tracking the Z axis is left alone but X-> -Y // and Y-> X such that X always points out of the ITS cylinder for every // layer including layer 1 (where the detectors are mounted upside down). // Inputs are: // AliITSgeom &source The AliITSgeom class with which to make this // a copy of. // Outputs are: // return *this The a new copy of source. //Begin_Html /* */ //End_Html Int_t i,j,k,l,id[3]; Double_t r0[3][3],r1[3][3]; Double_t a0[3][3] = {{0.,+1.,0.},{-1.,0.,0.},{0.,0.,+1.}}; Double_t a1[3][3] = {{0.,-1.,0.},{+1.,0.,0.},{0.,0.,+1.}}; *this = source; // copy everything for(i=0;i
GetIndex(id); GetGeomMatrix(i)->GetMatrix(r0); if(id[0]==1){ // Layer 1 is treated different from the others. for(j=0;j<3;j++) for(k=0;k<3;k++){ r1[j][k] = 0.; for(l=0;l<3;l++) r1[j][k] += a0[j][l]*r0[l][k]; } // end for j,k }else{ for(j=0;j<3;j++) for(k=0;k<3;k++){ r1[j][k] = 0.; for(l=0;l<3;l++) r1[j][k] += a1[j][l]*r0[l][k]; } // end for j,k } // end if GetGeomMatrix(i)->SetMatrix(r1); } // end for i this->fTrans = (this->fTrans && 0xfffe) + 1; // set bit 0 true. return; } //______________________________________________________________________ Int_t AliITSgeom::GetNearest(const Double_t g[3],Int_t lay){ // 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 are: // Double_t g[3] The ALICE Cartesean 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. // Outputs are: // 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 Distance2(g)) Distance2(g); if(d a;e--){dn[e] = dn[e-1];in[e] = in[e-1];} dn[a] = d; in[a] = i; } // end if d