fprintf(fp," dfr= %e %e %e\n",m[2][0],m[2][1],m[2][2]);
return;
}
-//______________________________________________________________________
-void AliITSgeom::PrintGeom(ostream *wb)const{
- // Stream out an object of class AliITSgeom to standard output.
- // Intputs:
- // ofstream *wb The output streaming buffer.
- // Outputs:
- // none.
- // Return:
- // none.
- Int_t i;
-
- wb->setf(ios::scientific);
- streamsize stsiz = wb->precision();
- *wb << fTrans << " ";
- *wb << fNmodules << " ";
- *wb << fNlayers << " ";
- for(i=0;i<fNlayers;i++) *wb << fNlad[i] << " ";
- for(i=0;i<fNlayers;i++) *wb << fNdet[i] << "\n";
- for(i=0;i<fNmodules;i++) {
- *wb <<setprecision(16) << *(GetGeomMatrix(i)) << "\n";
- } // end for i
- *wb << setprecision (stsiz);
- return;
-}
-//______________________________________________________________________
-// 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:
- // 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:
- // none.
- // Return:
- // 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<fNmodules;i++){
- g = this->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:
- // 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:
- // none.
- // Return:
- // 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<fNmodules;i++){
- g = this->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:
- // 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:
- // none.
- // Return:
- // 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<fNmodules;i++){
- g = this->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:
- // Float_t *stran A 3 element array representing the global
- // translations variances. The elements are r,
- // theta,z in cm/radians.
- // Float_t *srot A 3 element array representing the global rotation
- // angles variances about the three axis x,y,z in
- // radians.
- // Outputs:
- // none.
- // Return:
- // 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<fNmodules;i++){
- g = this->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(const 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).
- //Begin_Html
- /*
- <img src="picts/ITS/AliITSgeomMatrix_T1.gif">
- */
- //End_Html
- // Input:
- // AliITSgeom &source The AliITSgeom class with which to make this
- // a copy of.
- // Output:
- // none.
- // Return:
- // none.
- 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<GetIndexMax();i++){
- GetGeomMatrix(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)const{
// Finds the Detector (Module) that is nearest the point g [cm] in
}
//_______________________________________________________________________
void AliITSgeom::DetLToTrackingV2(Int_t md,Float_t xin,Float_t zin,
- Float_t &yout,Float_t &zout) {
+ Float_t &yout,Float_t &zout) const {
//Conversion from local coordinates on detectors to local
//coordinates used for tracking ("v2")
}
//_______________________________________________________________________
void AliITSgeom::TrackingV2ToDetL(Int_t md,Float_t yin,Float_t zin,
- Float_t &xout,Float_t &zout) {
+ Float_t &xout,Float_t &zout) const {
//Conversion from local coordinates used for tracking ("v2") to
//local detector coordinates
// Inputs:
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff