Corrections for memory leaks, random numbers, hit number; also some data members...
[u/mrichter/AliRoot.git] / ITS / AliITSsegmentationSDD.cxx
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b0f5e3fc 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
1ca7869b 16#include <TF1.h>
b0f5e3fc 17#include <TMath.h>
18
b0f5e3fc 19#include "AliITSsegmentationSDD.h"
20#include "AliITS.h"
314ba410 21#include "AliITSgeom.h"
d953664a 22#include "AliITSgeomSDD.h"
b0f5e3fc 23#include "AliRun.h"
314ba410 24#include "AliITSresponse.h"
b0f5e3fc 25
b0f5e3fc 26ClassImp(AliITSsegmentationSDD)
2a4239d3 27//----------------------------------------------------------------------
28AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom,
29 AliITSresponse *resp){
b0f5e3fc 30 // constructor
31 fGeom=geom;
03898a57 32 fDriftSpeed=resp->DriftSpeed();
b0f5e3fc 33 fCorr=0;
34 SetDetSize();
e8189707 35 SetPadSize();
36 SetNPads();
b0f5e3fc 37
38}
2a4239d3 39//______________________________________________________________________
b0f5e3fc 40AliITSsegmentationSDD::AliITSsegmentationSDD(){
e8189707 41 // standard constructor
b0f5e3fc 42 fGeom=0;
03898a57 43 fDriftSpeed=0;
b0f5e3fc 44 fCorr=0;
45 SetDetSize();
e8189707 46 SetPadSize();
47 SetNPads();
b0f5e3fc 48
49}
2a4239d3 50//----------------------------------------------------------------------
b0f5e3fc 51void AliITSsegmentationSDD::Init(){
52 // Standard initilisation routine
53
e8189707 54 if(!fGeom) {
314ba410 55 return;
56 //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
e8189707 57 }
b0f5e3fc 58 AliITSgeomSDD *gsdd = (AliITSgeomSDD *) (fGeom->GetShape(3,1,1));
59
60 const Float_t kconv=10000.;
61 fDz = 2.*kconv*gsdd->GetDz();
62 fDx = kconv*gsdd->GetDx();
63 fDy = 2.*kconv*gsdd->GetDy();
64}
65
2a4239d3 66//----------------------------------------------------------------------
b0f5e3fc 67void AliITSsegmentationSDD::
314ba410 68Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){
69 // returns neighbours for use in Cluster Finder routines and the like
b0f5e3fc 70
e8189707 71 if(iX >= fNanodes) printf("iX > fNanodes %d %d\n",iX,fNanodes);
72 if(iZ >= fNsamples) printf("iZ > fNsamples %d %d\n",iZ,fNsamples);
b0f5e3fc 73 *Nlist=4;
74 Xlist[0]=Xlist[1]=iX;
314ba410 75 if(iX && (iX != fNanodes/2)) Xlist[2]=iX-1;
b0f5e3fc 76 else Xlist[2]=iX;
314ba410 77 if ((iX !=fNanodes/2 -1) && (iX != fNanodes)) Xlist[3]=iX+1;
b0f5e3fc 78 else Xlist[3]=iX;
79 if(iZ) Zlist[0]=iZ-1;
80 else Zlist[0]=iZ;
81 if (iZ < fNsamples) Zlist[1]=iZ+1;
82 else Zlist[1]=iZ;
83 Zlist[2]=Zlist[3]=iZ;
b0f5e3fc 84}
2a4239d3 85//----------------------------------------------------------------------
86void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z,
87 Int_t &timebin,Int_t &anode){
03898a57 88// Returns cell coordinates (time sample,anode) incremented by 1 !!!!!
89// for given real local coordinates (x,z)
b0f5e3fc 90
91 // expects x, z in cm
92
93 const Float_t kconv=10000; // cm->um
94
b0f5e3fc 95 Int_t na = fNanodes/2;
96 Float_t driftpath=fDx-TMath::Abs(kconv*x);
03898a57 97 timebin=(Int_t)(driftpath/fDriftSpeed/fTimeStep);
98 anode=(Int_t)(kconv*(z/fPitch + na/2));
b0f5e3fc 99 if (x > 0) anode += na;
100
101 timebin+=1;
102 anode+=1;
103
104}
2a4239d3 105//----------------------------------------------------------------------
106void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode,
107 Float_t &x ,Float_t &z){
b0f5e3fc 108 // Transform from cell to real local coordinates
b0f5e3fc 109 // returns x, z in cm
110
03898a57 111 // the +0.5 means that an # and time bin # should start from 0 !!!
b0f5e3fc 112 const Float_t kconv=10000; // um->cm
03898a57 113 // the +0.5 means that an # and time bin # should start from 0 !!!
b0f5e3fc 114
b0f5e3fc 115 Int_t na = fNanodes/2;
03898a57 116 Float_t driftpath=(timebin+0.5)*fTimeStep*fDriftSpeed;
b0f5e3fc 117 if (anode >= na) x=(fDx-driftpath)/kconv;
118 else x = -(fDx-driftpath)/kconv;
119 if (anode >= na) anode-=na;
03898a57 120 z=((anode+0.5)*fPitch-fDz/2)/kconv;
b0f5e3fc 121
122}
2a4239d3 123//----------------------------------------------------------------------
e8189707 124void AliITSsegmentationSDD::GetPadTxz(Float_t &x,Float_t &z){
125 // Get anode and time bucket as floats - numbering from 0
126
127 // expects x, z in cm
128
129 const Float_t kconv=10000; // cm->um
130
2a4239d3 131 Float_t x0=x;
2a4239d3 132 Int_t na = fNanodes/2;
e8189707 133 Float_t driftpath=fDx-TMath::Abs(kconv*x);
03898a57 134 x=driftpath/fDriftSpeed/fTimeStep;
2a4239d3 135 z=kconv*z/fPitch + (float)na/2;
136 if (x0 < 0) x = -x;
e8189707 137
138}
2a4239d3 139//----------------------------------------------------------------------
b0f5e3fc 140void AliITSsegmentationSDD::GetLocal(Int_t module,Float_t *g ,Float_t *l){
141 // returns local coordinates from global
142 if(!fGeom) {
314ba410 143 return;
144 //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
b0f5e3fc 145 }
146 fGeom->GtoL(module,g,l);
147}
2a4239d3 148//----------------------------------------------------------------------
b0f5e3fc 149void AliITSsegmentationSDD::GetGlobal(Int_t module,Float_t *l ,Float_t *g){
150 // return global coordinates from local
151 if(!fGeom) {
314ba410 152 return;
153 //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
b0f5e3fc 154 }
155
156 fGeom->LtoG(module,l,g);
157
158}
f5d698b9 159//----------------------------------------------------------------------
160void AliITSsegmentationSDD::Print(){
161 // Print SDD segmentation Parameters
162
163 cout << "**************************************************" << endl;
164 cout << " Silicon Drift Detector Segmentation Parameters " << endl;
165 cout << "**************************************************" << endl;
166 cout << "Number of Time Samples: " << fNsamples << endl;
167 cout << "Number of Anodes: " << fNanodes << endl;
168 cout << "Time Step (ns): " << fTimeStep << endl;
169 cout << "Anode Pitch (um): " << fPitch << endl;
170 cout << "Full Detector Width (x): " << fDx << endl;
171 cout << "Half Detector Length (z): " << fDz << endl;
172 cout << "Full Detector Thickness (y): " << fDy << endl;
173 cout << "**************************************************" << endl;
174
175}
5752a110 176//______________________________________________________________________
177
178//______________________________________________________________________
179void AliITSsegmentationSDD::LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz){
180// Transformation from Geant detector centered local coordinates (cm) to
181// time bucket numbers ix and anode number iz.
182// Input:
183// Float_t x detector local coordinate x in cm with respect to the
184// center of the sensitive volume.
185// Float_t z detector local coordinate z in cm with respect to the
186// center of the sensitive volulme.
187// Output:
188// Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples.
189// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
190// A value of -1 for ix or iz indecates that this point is outside of the
191// detector segmentation as defined.
192// This segmentation geometry can be discribed as the following:
193// {assumes 2*Dx()=7.0cm Dz()=7.5264cm, Dpx()=25ns,
194// res->DeriftSpeed()=7.3mic/ns, Dpz()=512. For other values a only the
195// specific numbers will change not their layout.}
196//
197// 0 191 0
198// 0 |----------------------|---------------------| 256
199// | a time-bins | time-bins a |
200// | n | n |
201// | o |___________________o_|__> X
202// | d | d |
203// | e | e |
204// | s | s |
205// 255 |----------------------|---------------------| 511
206// |
207// V
208// Z
209 Float_t dx,dz,tb;
210 const Float_t kconv = 1.0E-04; // converts microns to cm.
211
212 ix = -1; // default values
213 iz = -1; // default values
214 dx = -kconv*Dx(); // lower left edge in cm.
215 dz = -0.5*kconv*Dz(); // lower left edge in cm.
216 if(x<dx || x>-dx) return; // outside of defined volume.
217 if(z<dz || z>-dz) return; // outside of defined volume.
03898a57 218 tb = fDriftSpeed*fTimeStep*kconv; // compute size of time bin.
5752a110 219 if(x>0) dx = -(dx + x)/tb; // distance from + side in time bin units
220 else dx = (x - dx)/tb; // distance from - side in time bin units
221 dz = (z - dz)/(kconv*fPitch); // distance in z in anode pitch units
222 ix = (Int_t) dx; // time bin
223 iz = (Int_t) dz; // anode
224 if(x>0) iz += Npz()/2; // if x>0 then + side anodes values.
225 return; // Found ix and iz, return.
226}
227//______________________________________________________________________
228void AliITSsegmentationSDD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z)
229{
230// Transformation from Detector time bucket and anode coordiantes to Geant
231// detector centerd local coordinates (cm).
232// Input:
233// Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples.
234// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
235// Output:
236// Float_t x detector local coordinate x in cm with respect to the
237// center of the sensitive volume.
238// Float_t z detector local coordinate z in cm with respect to the
239// center of the sensitive volulme.
240// If ix and or iz is outside of the segmentation range a value of -Dx()
241// or -0.5*Dz() is returned.
242// This segmentation geometry can be discribed as the following:
243// {assumes 2*Dx()=7.0cm Dz()=7.5264cm, Dpx()=25ns,
244// res->DeriftSpeed()=7.3mic/ns, Dpz()=512. For other values a only the
245// specific numbers will change not their layout.}
246//
247// 0 191 0
248// 0 |----------------------|---------------------| 256
249// | a time-bins | time-bins a |
250// | n | n |
251// | o |___________________o_|__> X
252// | d | d |
253// | e | e |
254// | s | s |
255// 255 |----------------------|---------------------| 511
256// |
257// V
258// Z
259 Int_t i,j;
260 Float_t tb;
261 const Float_t kconv = 1.0E-04; // converts microns to cm.
262
263 if(iz>=Npz()/2) x = kconv*Dx(); // default value for +x side.
264 else x = -kconv*Dx(); // default value for -x side.
265 z = -0.5*kconv*Dz(); // default value.
266 if(ix<0 || ix>=Npx()) return; // outside of detector
267 if(iz<0 || iz>=Npz()) return; // outside of detctor
03898a57 268 tb = fDriftSpeed*fTimeStep*kconv; // compute size of time bin.
5752a110 269 if(iz>=Npz()/2) tb *= -1.0; // for +x side decrement frmo Dx().
270 for(i=0;i<ix;i++) x += tb; // sum up to cell ix-1
271 x += 0.5*tb; // add 1/2 of cell ix for center location.
272 if(iz>=Npz()/2) iz -=Npz()/2;// If +x side don't count anodes from -x side.
273 for(j=0;j<iz;j++) z += kconv*fPitch; // sum up cell iz-1
274 z += 0.5*kconv*fPitch; // add 1/2 of cell iz for center location.
275 return; // Found x and z, return.
276}