New definition of the geometry based on builders and usign Ivana's envelop method...
authormartinez <martinez@f7af4fe6-9843-0410-8265-dc069ae4e863>
Fri, 23 Jan 2004 10:51:56 +0000 (10:51 +0000)
committermartinez <martinez@f7af4fe6-9843-0410-8265-dc069ae4e863>
Fri, 23 Jan 2004 10:51:56 +0000 (10:51 +0000)
MUON/AliMUONv1.cxx
MUON/AliMUONv1.h

index 02850935c7418e80937345c37d34c62bc5121a68..b3d4f49080f76becb52cdfefaf786a3c95b8fd1d 100644 (file)
 /* $Id$ */
 
 /////////////////////////////////////////////////////////
-//  Manager and hits classes for set:MUON version 0    //
+//  Manager and hits classes for set:MUON version 1    //
 /////////////////////////////////////////////////////////
+
 #include <TRandom.h>
 #include <TF1.h>
 #include <TClonesArray.h>
-#include <TLorentzVector.h>   
+#include <TLorentzVector.h> 
+#include <TNode.h> 
+#include <TRandom.h> 
+#include <TTUBE.h>
+#include <TGeoMatrix.h>
 #include <TVirtualMC.h>
 #include <TParticle.h>
 
 #include "AliMUONHit.h"
 #include "AliMUONTriggerCircuit.h"
 #include "AliMUONv1.h"
+#include "AliMUONVGeometryBuilder.h"   
+#include "AliMUONChamberGeometry.h"    
+#include "AliMUONGeometryEnvelope.h"   
+#include "AliMUONGeometryConstituent.h"        
 #include "AliMagF.h"
 #include "AliRun.h"
 #include "AliMC.h"
@@ -40,11 +49,10 @@ ClassImp(AliMUONv1)
  
 //___________________________________________
 AliMUONv1::AliMUONv1() : AliMUON()
-  ,fTrackMomentum(), fTrackPosition()
+  ,fTrackMomentum(), fTrackPosition(),fGlobalTransformation(0) 
 {
 // Constructor
     fChambers   = 0;
-    fStations   = 0;
     fStepManagerVersionOld  = kFALSE;
     fAngleEffect = kTRUE;
     fStepMaxInActiveGas     = 0.6;
@@ -60,9 +68,6 @@ AliMUONv1::AliMUONv1(const char *name, const char *title)
 {
 // Constructor
     // By default include all stations
-    fStations = new Int_t[5];
-    for (Int_t i=0; i<5; i++) fStations[i] = 1;
-
     AliMUONFactory factory;
     factory.Build(this, title);
 
@@ -96,1370 +101,134 @@ AliMUONv1::AliMUONv1(const char *name, const char *title)
     fAngleEffectNorma->SetParameter(1,-6.809e-01);
     fAngleEffectNorma->SetParameter(2,5.151e-02);
     fAngleEffectNorma->SetParameter(3,-1.490e-03);
+
+    // Define the global transformation:
+    // Transformation from the old ALICE coordinate system to a new one:
+    // x->-x, z->-z 
+    TGeoRotation* rotGlobal 
+      = new TGeoRotation("rotGlobal", 90., 180., 90., 90., 180., 0.);
+    fGlobalTransformation = new TGeoCombiTrans(0., 0., 0., rotGlobal);
 }
 
 //___________________________________________
-void AliMUONv1::CreateGeometry()
+AliMUONv1::~AliMUONv1()
 {
-//
-//   Note: all chambers have the same structure, which could be 
-//   easily parameterised. This was intentionally not done in order
-//   to give a starting point for the implementation of the actual 
-//   design of each station. 
-  Int_t *idtmed = fIdtmed->GetArray()-1099;
+// Destructor
 
-//   Distance between Stations
-//
-     Float_t bpar[3];
-     Float_t tpar[3];
-//      Float_t pgpar[10];
-     Float_t zpos1, zpos2, zfpos;
-     // Outer excess and inner recess for mother volume radius
-     // with respect to ROuter and RInner
-     Float_t dframep=.001; // Value for station 3 should be 6 ...
-     // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
-//      Float_t dframep1=.001;
-     Float_t dframep1 = 11.0;
-//      Bool_t frameCrosses=kFALSE;     
-     Bool_t frameCrosses=kTRUE;     
-     Float_t *dum=0;
-     
-//      Float_t dframez=0.9;
-     // Half of the total thickness of frame crosses (including DAlu)
-     // for each chamber in stations 1 and 2:
-     // 3% of X0 of composite material,
-     // but taken as Aluminium here, with same thickness in number of X0
-     Float_t dframez = 3. * 8.9 / 100;
-//      Float_t dr;
-     Float_t dstation;
-
-//
-//   Rotation matrices in the x-y plane  
-     Int_t idrotm[1199];
-//   phi=   0 deg
-     AliMatrix(idrotm[1100],  90.,   0., 90.,  90., 0., 0.);
-//   phi=  90 deg
-     AliMatrix(idrotm[1101],  90.,  90., 90., 180., 0., 0.);
-//   phi= 180 deg
-     AliMatrix(idrotm[1102],  90., 180., 90., 270., 0., 0.);
-//   phi= 270 deg
-     AliMatrix(idrotm[1103],  90., 270., 90.,   0., 0., 0.);
-//
-     Float_t phi=2*TMath::Pi()/12/2;
-
-//
-//   pointer to the current chamber
-//   pointer to the current chamber
-     Int_t idAlu1=idtmed[1103]; // medium 4
-     Int_t idAlu2=idtmed[1104]; // medium 5
-//     Int_t idAlu1=idtmed[1100];
-//     Int_t idAlu2=idtmed[1100];
-     Int_t idAir=idtmed[1100]; // medium 1
-//      Int_t idGas=idtmed[1105]; // medium 6 = Ar-isoC4H10 gas
-     Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
-     
-
-     AliMUONChamber *iChamber, *iChamber1, *iChamber2;
-
-     if (fStations[0]) {
-        
-//********************************************************************
-//                            Station 1                             **
-//********************************************************************
-//  CONCENTRIC
-     // indices 1 and 2 for first and second chambers in the station
-     // iChamber (first chamber) kept for other quanties than Z,
-     // assumed to be the same in both chambers
-     iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[0];
-     iChamber2 =(AliMUONChamber*) (*fChambers)[1];
-     zpos1=iChamber1->Z(); 
-     zpos2=iChamber2->Z();
-     dstation = TMath::Abs(zpos2 - zpos1);
-     // DGas decreased from standard one (0.5)
-     iChamber->SetDGas(0.4); iChamber2->SetDGas(0.4);
-     // DAlu increased from standard one (3% of X0),
-     // because more electronics with smaller pads
-     iChamber->SetDAlu(3.5 * 8.9 / 100.); iChamber2->SetDAlu(3.5 * 8.9 / 100.);
-     zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
-     
-//
-//   Mother volume
-     tpar[0] = iChamber->RInner()-dframep; 
-     tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
-     tpar[2] = dstation/5;
-
-     gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
-     gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);
-     gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
-     gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");     
-// // Aluminium frames
-// // Outer frames
-//      pgpar[0] = 360/12/2;
-//      pgpar[1] = 360.;
-//      pgpar[2] = 12.;
-//      pgpar[3] =   2;
-//      pgpar[4] = -dframez/2;
-//      pgpar[5] = iChamber->ROuter();
-//      pgpar[6] = pgpar[5]+dframep1;
-//      pgpar[7] = +dframez/2;
-//      pgpar[8] = pgpar[5];
-//      pgpar[9] = pgpar[6];
-//      gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
-//      gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
-//      gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
-//      gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
-// //
-// // Inner frame
-//      tpar[0]= iChamber->RInner()-dframep1;
-//      tpar[1]= iChamber->RInner();
-//      tpar[2]= dframez/2;
-//      gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
-//      gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);
-
-//      gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
-//      gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
-//
-// Frame Crosses
-     if (frameCrosses) {
-         // outside gas
-         // security for inside mother volume
-        bpar[0] = (iChamber->ROuter() - iChamber->RInner())
-          * TMath::Cos(TMath::ASin(dframep1 /
-                                  (iChamber->ROuter() - iChamber->RInner())))
-          / 2.0;
-        bpar[1] = dframep1/2;
-        // total thickness will be (4 * bpar[2]) for each chamber,
-        // which has to be equal to (2 * dframez) - DAlu
-        bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
-        gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
-        gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
-        
-        gMC->Gspos("S01B",1,"S01M", -iChamber->RInner()-bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S01B",2,"S01M",  iChamber->RInner()+bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S01B",3,"S01M", 0, -iChamber->RInner()-bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S01B",4,"S01M", 0,  iChamber->RInner()+bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S01B",5,"S01M", -iChamber->RInner()-bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S01B",6,"S01M", +iChamber->RInner()+bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S01B",7,"S01M", 0, -iChamber->RInner()-bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S01B",8,"S01M", 0, +iChamber->RInner()+bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-        
-        gMC->Gspos("S02B",1,"S02M", -iChamber->RInner()-bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S02B",2,"S02M",  iChamber->RInner()+bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S02B",3,"S02M", 0, -iChamber->RInner()-bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S02B",4,"S02M", 0,  iChamber->RInner()+bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S02B",5,"S02M", -iChamber->RInner()-bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S02B",6,"S02M", +iChamber->RInner()+bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S02B",7,"S02M", 0, -iChamber->RInner()-bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S02B",8,"S02M", 0, +iChamber->RInner()+bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-     }
-//
-//   Chamber Material represented by Alu sheet
-     tpar[0]= iChamber->RInner();
-     tpar[1]= iChamber->ROuter();
-     tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
-     gMC->Gsvolu("S01A", "TUBE",  idAlu2, tpar, 3);
-     gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
-     gMC->Gspos("S01A", 1, "S01M", 0., 0., 0.,  0, "ONLY");
-     gMC->Gspos("S02A", 1, "S02M", 0., 0., 0.,  0, "ONLY");
-//     
-//   Sensitive volumes
-     // tpar[2] = iChamber->DGas();
-     tpar[2] = iChamber->DGas()/2;
-     gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
-     gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
-     gMC->Gspos("S01G", 1, "S01A", 0., 0., 0.,  0, "ONLY");
-     gMC->Gspos("S02G", 1, "S02A", 0., 0., 0.,  0, "ONLY");
-//
-// Frame Crosses to be placed inside gas
-     // NONE: chambers are sensitive everywhere
-//      if (frameCrosses) {
-
-//      dr = (iChamber->ROuter() - iChamber->RInner());
-//      bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
-//      bpar[1] = dframep1/2;
-//      bpar[2] = iChamber->DGas()/2;
-//      gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
-//      gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
-        
-//      gMC->Gspos("S01F",1,"S01G", +iChamber->RInner()+bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S01F",2,"S01G", -iChamber->RInner()-bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S01F",3,"S01G", 0, +iChamber->RInner()+bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-//      gMC->Gspos("S01F",4,"S01G", 0, -iChamber->RInner()-bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-        
-//      gMC->Gspos("S02F",1,"S02G", +iChamber->RInner()+bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S02F",2,"S02G", -iChamber->RInner()-bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S02F",3,"S02G", 0, +iChamber->RInner()+bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-//      gMC->Gspos("S02F",4,"S02G", 0, -iChamber->RInner()-bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-//      }
-     }
-     if (fStations[1]) {
-        
-//********************************************************************
-//                            Station 2                             **
-//********************************************************************
-     // indices 1 and 2 for first and second chambers in the station
-     // iChamber (first chamber) kept for other quanties than Z,
-     // assumed to be the same in both chambers
-     iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[2];
-     iChamber2 =(AliMUONChamber*) (*fChambers)[3];
-     zpos1=iChamber1->Z(); 
-     zpos2=iChamber2->Z();
-     dstation = TMath::Abs(zpos2 - zpos1);
-     // DGas and DAlu not changed from standard values
-     zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
-     
-//
-//   Mother volume
-     tpar[0] = iChamber->RInner()-dframep; 
-     tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
-     tpar[2] = dstation/5;
-
-     gMC->Gsvolu("S03M", "TUBE", idAir, tpar, 3);
-     gMC->Gsvolu("S04M", "TUBE", idAir, tpar, 3);
-     gMC->Gspos("S03M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
-     gMC->Gspos("S04M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
-     gMC->Gsbool("S03M", "L3DO");
-     gMC->Gsbool("S03M", "L3O1");
-     gMC->Gsbool("S03M", "L3O2");
-     gMC->Gsbool("S04M", "L3DO");
-     gMC->Gsbool("S04M", "L3O1");
-     gMC->Gsbool("S04M", "L3O2");
-
-// // Aluminium frames
-// // Outer frames
-//      pgpar[0] = 360/12/2;
-//      pgpar[1] = 360.;
-//      pgpar[2] = 12.;
-//      pgpar[3] =   2;
-//      pgpar[4] = -dframez/2;
-//      pgpar[5] = iChamber->ROuter();
-//      pgpar[6] = pgpar[5]+dframep;
-//      pgpar[7] = +dframez/2;
-//      pgpar[8] = pgpar[5];
-//      pgpar[9] = pgpar[6];
-//      gMC->Gsvolu("S03O", "PGON", idAlu1, pgpar, 10);
-//      gMC->Gsvolu("S04O", "PGON", idAlu1, pgpar, 10);
-//      gMC->Gspos("S03O",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S03O",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
-//      gMC->Gspos("S04O",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S04O",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
-// //
-// // Inner frame
-//      tpar[0]= iChamber->RInner()-dframep;
-//      tpar[1]= iChamber->RInner();
-//      tpar[2]= dframez/2;
-//      gMC->Gsvolu("S03I", "TUBE", idAlu1, tpar, 3);
-//      gMC->Gsvolu("S04I", "TUBE", idAlu1, tpar, 3);
-
-//      gMC->Gspos("S03I",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S03I",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
-//      gMC->Gspos("S04I",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
-//      gMC->Gspos("S04I",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
-//
-// Frame Crosses
-     if (frameCrosses) {
-         // outside gas
-         // security for inside mother volume
-        bpar[0] = (iChamber->ROuter() - iChamber->RInner())
-          * TMath::Cos(TMath::ASin(dframep1 /
-                                  (iChamber->ROuter() - iChamber->RInner())))
-          / 2.0;
-        bpar[1] = dframep1/2;
-        // total thickness will be (4 * bpar[2]) for each chamber,
-        // which has to be equal to (2 * dframez) - DAlu
-        bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
-        gMC->Gsvolu("S03B", "BOX", idAlu1, bpar, 3);
-        gMC->Gsvolu("S04B", "BOX", idAlu1, bpar, 3);
-        
-        gMC->Gspos("S03B",1,"S03M", -iChamber->RInner()-bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S03B",2,"S03M", +iChamber->RInner()+bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S03B",3,"S03M", 0, -iChamber->RInner()-bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S03B",4,"S03M", 0, +iChamber->RInner()+bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S03B",5,"S03M", -iChamber->RInner()-bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S03B",6,"S03M", +iChamber->RInner()+bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S03B",7,"S03M", 0, -iChamber->RInner()-bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S03B",8,"S03M", 0, +iChamber->RInner()+bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-        
-        gMC->Gspos("S04B",1,"S04M", -iChamber->RInner()-bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S04B",2,"S04M", +iChamber->RInner()+bpar[0] , 0, zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S04B",3,"S04M", 0, -iChamber->RInner()-bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S04B",4,"S04M", 0, +iChamber->RInner()+bpar[0] , zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S04B",5,"S04M", -iChamber->RInner()-bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S04B",6,"S04M", +iChamber->RInner()+bpar[0] , 0,-zfpos, 
-                   idrotm[1100],"ONLY");
-        gMC->Gspos("S04B",7,"S04M", 0, -iChamber->RInner()-bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-        gMC->Gspos("S04B",8,"S04M", 0, +iChamber->RInner()+bpar[0] ,-zfpos, 
-                   idrotm[1101],"ONLY");
-     }
-//
-//   Chamber Material represented by Alu sheet
-     tpar[0]= iChamber->RInner();
-     tpar[1]= iChamber->ROuter();
-     tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
-     gMC->Gsvolu("S03A", "TUBE", idAlu2, tpar, 3);
-     gMC->Gsvolu("S04A", "TUBE", idAlu2, tpar, 3);
-     gMC->Gspos("S03A", 1, "S03M", 0., 0., 0.,  0, "ONLY");
-     gMC->Gspos("S04A", 1, "S04M", 0., 0., 0.,  0, "ONLY");
-//     
-//   Sensitive volumes
-     // tpar[2] = iChamber->DGas();
-     tpar[2] = iChamber->DGas()/2;
-     gMC->Gsvolu("S03G", "TUBE", idGas, tpar, 3);
-     gMC->Gsvolu("S04G", "TUBE", idGas, tpar, 3);
-     gMC->Gspos("S03G", 1, "S03A", 0., 0., 0.,  0, "ONLY");
-     gMC->Gspos("S04G", 1, "S04A", 0., 0., 0.,  0, "ONLY");
-//
-// Frame Crosses to be placed inside gas 
-     // NONE: chambers are sensitive everywhere
-//      if (frameCrosses) {
-
-//      dr = (iChamber->ROuter() - iChamber->RInner());
-//      bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
-//      bpar[1] = dframep1/2;
-//      bpar[2] = iChamber->DGas()/2;
-//      gMC->Gsvolu("S03F", "BOX", idAlu1, bpar, 3);
-//      gMC->Gsvolu("S04F", "BOX", idAlu1, bpar, 3);
-        
-//      gMC->Gspos("S03F",1,"S03G", +iChamber->RInner()+bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S03F",2,"S03G", -iChamber->RInner()-bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S03F",3,"S03G", 0, +iChamber->RInner()+bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-//      gMC->Gspos("S03F",4,"S03G", 0, -iChamber->RInner()-bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-        
-//      gMC->Gspos("S04F",1,"S04G", +iChamber->RInner()+bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S04F",2,"S04G", -iChamber->RInner()-bpar[0] , 0, 0, 
-//                 idrotm[1100],"ONLY");
-//      gMC->Gspos("S04F",3,"S04G", 0, +iChamber->RInner()+bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-//      gMC->Gspos("S04F",4,"S04G", 0, -iChamber->RInner()-bpar[0] , 0, 
-//                 idrotm[1101],"ONLY");
-//      }
-     }
-     // define the id of tracking media:
-     Int_t idCopper = idtmed[1110];
-     Int_t idGlass  = idtmed[1111];
-     Int_t idCarbon = idtmed[1112];
-     Int_t idRoha   = idtmed[1113];
-
-      // sensitive area: 40*40 cm**2
-     const Float_t ksensLength = 40.; 
-     const Float_t ksensHeight = 40.; 
-     const Float_t ksensWidth  = 0.5; // according to TDR fig 2.120 
-     const Int_t ksensMaterial = idGas;
-     const Float_t kyOverlap   = 1.5; 
-
-     // PCB dimensions in cm; width: 30 mum copper   
-     const Float_t kpcbLength  = ksensLength; 
-     const Float_t kpcbHeight  = 60.; 
-     const Float_t kpcbWidth   = 0.003;   
-     const Int_t   kpcbMaterial= idCopper;
-
-     // Insulating material: 200 mum glass fiber glued to pcb  
-     const Float_t kinsuLength = kpcbLength; 
-     const Float_t kinsuHeight = kpcbHeight; 
-     const Float_t kinsuWidth  = 0.020;   
-     const Int_t kinsuMaterial = idGlass;
-
-     // Carbon fiber panels: 200mum carbon/epoxy skin   
-     const Float_t kpanelLength = ksensLength; 
-     const Float_t kpanelHeight = ksensHeight; 
-     const Float_t kpanelWidth  = 0.020;      
-     const Int_t kpanelMaterial = idCarbon;
-
-     // rohacell between the two carbon panels   
-     const Float_t krohaLength = ksensLength; 
-     const Float_t krohaHeight = ksensHeight; 
-     const Float_t krohaWidth  = 0.5;
-     const Int_t krohaMaterial = idRoha;
-
-     // Frame around the slat: 2 sticks along length,2 along height  
-     // H: the horizontal ones 
-     const Float_t khFrameLength = kpcbLength; 
-     const Float_t khFrameHeight = 1.5; 
-     const Float_t khFrameWidth  = ksensWidth; 
-     const Int_t khFrameMaterial = idGlass;
-
-     // V: the vertical ones 
-     const Float_t kvFrameLength = 4.0; 
-     const Float_t kvFrameHeight = ksensHeight + khFrameHeight; 
-     const Float_t kvFrameWidth  = ksensWidth;
-     const Int_t kvFrameMaterial = idGlass;
-
-     // B: the horizontal border filled with rohacell 
-     const Float_t kbFrameLength = khFrameLength; 
-     const Float_t kbFrameHeight = (kpcbHeight - ksensHeight)/2. - khFrameHeight; 
-     const Float_t kbFrameWidth  = khFrameWidth;
-     const Int_t kbFrameMaterial = idRoha;
-
-     // NULOC: 30 mum copper + 200 mum vetronite (same radiation length as 14mum copper)
-     const Float_t knulocLength = 2.5; 
-     const Float_t knulocHeight = 7.5; 
-     const Float_t knulocWidth  = 0.0030 + 0.0014; // equivalent copper width of vetronite; 
-     const Int_t   knulocMaterial = idCopper;
-
-     const Float_t kslatHeight = kpcbHeight; 
-     const Float_t kslatWidth = ksensWidth + 2.*(kpcbWidth + kinsuWidth + 
-                                              2.* kpanelWidth + krohaWidth);
-     const Int_t kslatMaterial = idAir;
-     const Float_t kdSlatLength = kvFrameLength; // border on left and right 
-
-     Float_t spar[3];  
-     Int_t i, j;
-
-     // the panel volume contains the rohacell
-
-     Float_t twidth = 2 * kpanelWidth + krohaWidth; 
-     Float_t panelpar[3] = { kpanelLength/2., kpanelHeight/2., twidth/2. }; 
-     Float_t rohapar[3] = { krohaLength/2., krohaHeight/2., krohaWidth/2. }; 
-
-     // insulating material contains PCB-> gas-> 2 borders filled with rohacell
-
-     twidth = 2*(kinsuWidth + kpcbWidth) + ksensWidth;  
-     Float_t insupar[3] = { kinsuLength/2., kinsuHeight/2., twidth/2. }; 
-     twidth -= 2 * kinsuWidth; 
-     Float_t pcbpar[3] = { kpcbLength/2., kpcbHeight/2., twidth/2. }; 
-     Float_t senspar[3] = { ksensLength/2., ksensHeight/2., ksensWidth/2. }; 
-     Float_t theight = 2*khFrameHeight + ksensHeight;
-     Float_t hFramepar[3]={khFrameLength/2., theight/2., khFrameWidth/2.}; 
-     Float_t bFramepar[3]={kbFrameLength/2., kbFrameHeight/2., kbFrameWidth/2.}; 
-     Float_t vFramepar[3]={kvFrameLength/2., kvFrameHeight/2., kvFrameWidth/2.}; 
-     Float_t nulocpar[3]={knulocLength/2., knulocHeight/2., knulocWidth/2.}; 
-     Float_t xx;
-     Float_t xxmax = (kbFrameLength - knulocLength)/2.; 
-     Int_t index=0;
-     
-     if (fStations[2]) {
-        
-//********************************************************************
-//                            Station 3                             **
-//********************************************************************
-     // indices 1 and 2 for first and second chambers in the station
-     // iChamber (first chamber) kept for other quanties than Z,
-     // assumed to be the same in both chambers
-     iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[4];
-     iChamber2 =(AliMUONChamber*) (*fChambers)[5];
-     zpos1=iChamber1->Z(); 
-     zpos2=iChamber2->Z();
-     dstation = TMath::Abs(zpos2 - zpos1);
+  delete fGlobalTransformation;
+}
 
+//__________________________________________________
+void AliMUONv1::CreateGeometry()
+{
 //
-//   Mother volume
-     tpar[0] = iChamber->RInner()-dframep; 
-     tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
-     tpar[2] = dstation/5;
-
-     char *slats5Mother = "S05M";
-     char *slats6Mother = "S06M";
-     Float_t zoffs5 = 0;
-     Float_t zoffs6 = 0;
-
-     if (gAlice->GetModule("DIPO")) {
-       slats5Mother="DDIP";
-       slats6Mother="DDIP";
-
-       zoffs5 = TMath::Abs(zpos1);
-       zoffs6 = TMath::Abs(zpos2);
-     }
-
-     else {
-       gMC->Gsvolu("S05M", "TUBE", idAir, tpar, 3);
-       gMC->Gsvolu("S06M", "TUBE", idAir, tpar, 3);
-       gMC->Gspos("S05M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
-       gMC->Gspos("S06M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
-     }
-
-     // volumes for slat geometry (xx=5,..,10 chamber id): 
-     // Sxx0 Sxx1 Sxx2 Sxx3  -->   Slat Mother volumes 
-     // SxxG                          -->   Sensitive volume (gas)
-     // SxxP                          -->   PCB (copper) 
-     // SxxI                          -->   Insulator (vetronite) 
-     // SxxC                          -->   Carbon panel 
-     // SxxR                          -->   Rohacell
-     // SxxH, SxxV                    -->   Horizontal and Vertical frames (vetronite)
-     // SB5x                          -->   Volumes for the 35 cm long PCB
-     // slat dimensions: slat is a MOTHER volume!!! made of air
-
-     // only for chamber 5: slat 1 has a PCB shorter by 5cm!
-
-     Float_t tlength = 35.;
-     Float_t panelpar2[3]  = { tlength/2., panelpar[1],  panelpar[2]}; 
-     Float_t rohapar2[3]   = { tlength/2., rohapar[1],   rohapar[2]}; 
-     Float_t insupar2[3]   = { tlength/2., insupar[1],   insupar[2]}; 
-     Float_t pcbpar2[3]    = { tlength/2., pcbpar[1],    pcbpar[2]}; 
-     Float_t senspar2[3]   = { tlength/2., senspar[1],   senspar[2]}; 
-     Float_t hFramepar2[3] = { tlength/2., hFramepar[1], hFramepar[2]}; 
-     Float_t bFramepar2[3] = { tlength/2., bFramepar[1], bFramepar[2]}; 
-
-     const Int_t knSlats3 = 5;  // number of slats per quadrant
-     const Int_t knPCB3[knSlats3] = {3,3,4,3,2}; // n PCB per slat
-     const Float_t kxpos3[knSlats3] = {31., 40., 0., 0., 0.};
-     Float_t slatLength3[knSlats3]; 
-
-     // create and position the slat (mother) volumes 
-
-     char volNam5[5];
-     char volNam6[5];
-     Float_t xSlat3;
-
-     Float_t spar2[3];
-     for (i = 0; i<knSlats3; i++){
-       slatLength3[i] = kpcbLength * knPCB3[i] + 2. * kdSlatLength; 
-       xSlat3 = slatLength3[i]/2. - kvFrameLength/2. + kxpos3[i]; 
-       if (i==1 || i==0) slatLength3[i] -=  2. *kdSlatLength; // frame out in PCB with circular border 
-       Float_t ySlat31 =  ksensHeight * i - kyOverlap * i; 
-       Float_t ySlat32 = -ksensHeight * i + kyOverlap * i; 
-       spar[0] = slatLength3[i]/2.; 
-       spar[1] = kslatHeight/2.;
-       spar[2] = kslatWidth/2. * 1.01; 
-       // take away 5 cm from the first slat in chamber 5
-       Float_t xSlat32 = 0;
-       if (i==1 || i==2) { // 1 pcb is shortened by 5cm
-        spar2[0] = spar[0]-5./2.;
-        xSlat32 = xSlat3 - 5/2.;
-       }
-       else {
-        spar2[0] = spar[0];
-        xSlat32 = xSlat3;
-       }
-       spar2[1] = spar[1];
-       spar2[2] = spar[2]; 
-       Float_t dzCh3=spar[2] * 1.01;
-       // zSlat to be checked (odd downstream or upstream?)
-       Float_t zSlat = (i%2 ==0)? -spar[2] : spar[2];
-
-       if (gAlice->GetModule("DIPO")) {zSlat*=-1.;}
-
-       sprintf(volNam5,"S05%d",i);
-       gMC->Gsvolu(volNam5,"BOX",kslatMaterial,spar2,3);
-       gMC->Gspos(volNam5, i*4+1,slats5Mother, -xSlat32, ySlat31, zoffs5-zSlat-2.*dzCh3, 0, "ONLY");
-       gMC->Gspos(volNam5, i*4+2,slats5Mother, +xSlat32, ySlat31, zoffs5-zSlat+2.*dzCh3, 0, "ONLY");
-       
-       if (i>0) { 
-        gMC->Gspos(volNam5, i*4+3,slats5Mother,-xSlat32, ySlat32, zoffs5-zSlat-2.*dzCh3, 0, "ONLY");
-        gMC->Gspos(volNam5, i*4+4,slats5Mother,+xSlat32, ySlat32, zoffs5-zSlat+2.*dzCh3, 0, "ONLY");
-       }
-       sprintf(volNam6,"S06%d",i);
-       gMC->Gsvolu(volNam6,"BOX",kslatMaterial,spar,3);
-       gMC->Gspos(volNam6, i*4+1,slats6Mother,-xSlat3, ySlat31, zoffs6-zSlat-2.*dzCh3, 0, "ONLY");
-       gMC->Gspos(volNam6, i*4+2,slats6Mother,+xSlat3, ySlat31, zoffs6-zSlat+2.*dzCh3, 0, "ONLY");
-       if (i>0) { 
-        gMC->Gspos(volNam6, i*4+3,slats6Mother,-xSlat3, ySlat32, zoffs6-zSlat-2.*dzCh3, 0, "ONLY");
-        gMC->Gspos(volNam6, i*4+4,slats6Mother,+xSlat3, ySlat32, zoffs6-zSlat+2.*dzCh3, 0, "ONLY");
-       }
-     }
-
-     // create the panel volume 
-     gMC->Gsvolu("S05C","BOX",kpanelMaterial,panelpar,3);
-     gMC->Gsvolu("SB5C","BOX",kpanelMaterial,panelpar2,3);
-     gMC->Gsvolu("S06C","BOX",kpanelMaterial,panelpar,3);
-
-     // create the rohacell volume 
-
-     gMC->Gsvolu("S05R","BOX",krohaMaterial,rohapar,3);
-     gMC->Gsvolu("SB5R","BOX",krohaMaterial,rohapar2,3);
-     gMC->Gsvolu("S06R","BOX",krohaMaterial,rohapar,3);
-
-     // create the insulating material volume 
-
-     gMC->Gsvolu("S05I","BOX",kinsuMaterial,insupar,3);
-     gMC->Gsvolu("SB5I","BOX",kinsuMaterial,insupar2,3);
-     gMC->Gsvolu("S06I","BOX",kinsuMaterial,insupar,3);
-
-     // create the PCB volume 
-
-     gMC->Gsvolu("S05P","BOX",kpcbMaterial,pcbpar,3);
-     gMC->Gsvolu("SB5P","BOX",kpcbMaterial,pcbpar2,3);
-     gMC->Gsvolu("S06P","BOX",kpcbMaterial,pcbpar,3);
-     // create the sensitive volumes,
-     gMC->Gsvolu("S05G","BOX",ksensMaterial,dum,0);
-     gMC->Gsvolu("S06G","BOX",ksensMaterial,dum,0);
-
-
-     // create the vertical frame volume 
-
-     gMC->Gsvolu("S05V","BOX",kvFrameMaterial,vFramepar,3);
-     gMC->Gsvolu("S06V","BOX",kvFrameMaterial,vFramepar,3);
-
-     // create the horizontal frame volume 
-
-     gMC->Gsvolu("S05H","BOX",khFrameMaterial,hFramepar,3);
-     gMC->Gsvolu("SB5H","BOX",khFrameMaterial,hFramepar2,3);
-     gMC->Gsvolu("S06H","BOX",khFrameMaterial,hFramepar,3);
-
-     // create the horizontal border volume 
-
-     gMC->Gsvolu("S05B","BOX",kbFrameMaterial,bFramepar,3);
-     gMC->Gsvolu("SB5B","BOX",kbFrameMaterial,bFramepar2,3);
-     gMC->Gsvolu("S06B","BOX",kbFrameMaterial,bFramepar,3);
-
-     index=0; 
-     for (i = 0; i<knSlats3; i++){
-       sprintf(volNam5,"S05%d",i);
-       sprintf(volNam6,"S06%d",i);
-       Float_t xvFrame  = (slatLength3[i] - kvFrameLength)/2.;
-       Float_t xvFrame2  = xvFrame;
-       if ( i==1 || i ==2 ) xvFrame2 -= 5./2.;
-       // position the vertical frames 
-       if (i!=1 && i!=0) { 
-        gMC->Gspos("S05V",2*i-1,volNam5, xvFrame2, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S05V",2*i  ,volNam5,-xvFrame2, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S06V",2*i-1,volNam6, xvFrame, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S06V",2*i  ,volNam6,-xvFrame, 0., 0. , 0, "ONLY");
-       }       
-       // position the panels and the insulating material 
-       for (j=0; j<knPCB3[i]; j++){
-        index++;
-        Float_t xx = ksensLength * (-knPCB3[i]/2.+j+.5); 
-        Float_t xx2 = xx + 5/2.; 
-        
-        Float_t zPanel = spar[2] - panelpar[2]; 
-        if ( (i==1 || i==2) && j == knPCB3[i]-1) { // 1 pcb is shortened by 5cm 
-          gMC->Gspos("SB5C",2*index-1,volNam5, xx, 0., zPanel , 0, "ONLY");
-          gMC->Gspos("SB5C",2*index  ,volNam5, xx, 0.,-zPanel , 0, "ONLY");
-          gMC->Gspos("SB5I",index    ,volNam5, xx, 0., 0      , 0, "ONLY");
-        }
-        else if ( (i==1 || i==2) && j < knPCB3[i]-1) {
-          gMC->Gspos("S05C",2*index-1,volNam5, xx2, 0., zPanel , 0, "ONLY");
-          gMC->Gspos("S05C",2*index  ,volNam5, xx2, 0.,-zPanel , 0, "ONLY");
-          gMC->Gspos("S05I",index    ,volNam5, xx2, 0., 0 , 0, "ONLY");
-        }
-        else {
-          gMC->Gspos("S05C",2*index-1,volNam5, xx, 0., zPanel , 0, "ONLY");
-          gMC->Gspos("S05C",2*index  ,volNam5, xx, 0.,-zPanel , 0, "ONLY");
-          gMC->Gspos("S05I",index    ,volNam5, xx, 0., 0 , 0, "ONLY");
-        }
-        gMC->Gspos("S06C",2*index-1,volNam6, xx, 0., zPanel , 0, "ONLY");
-        gMC->Gspos("S06C",2*index  ,volNam6, xx, 0.,-zPanel , 0, "ONLY");
-        gMC->Gspos("S06I",index,volNam6, xx, 0., 0 , 0, "ONLY");
-       } 
-     }
-     
-     // position the rohacell volume inside the panel volume
-     gMC->Gspos("S05R",1,"S05C",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("SB5R",1,"SB5C",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S06R",1,"S06C",0.,0.,0.,0,"ONLY"); 
-
-     // position the PCB volume inside the insulating material volume
-     gMC->Gspos("S05P",1,"S05I",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("SB5P",1,"SB5I",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S06P",1,"S06I",0.,0.,0.,0,"ONLY"); 
-     // position the horizontal frame volume inside the PCB volume
-     gMC->Gspos("S05H",1,"S05P",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("SB5H",1,"SB5P",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S06H",1,"S06P",0.,0.,0.,0,"ONLY"); 
-     // position the sensitive volume inside the horizontal frame volume
-     gMC->Gsposp("S05G",1,"S05H",0.,0.,0.,0,"ONLY",senspar,3); 
-     gMC->Gsposp("S05G",1,"SB5H",0.,0.,0.,0,"ONLY",senspar2,3); 
-     gMC->Gsposp("S06G",1,"S06H",0.,0.,0.,0,"ONLY",senspar,3); 
-     // position the border volumes inside the PCB volume
-     Float_t yborder = ( kpcbHeight - kbFrameHeight ) / 2.; 
-     gMC->Gspos("S05B",1,"S05P",0., yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S05B",2,"S05P",0.,-yborder,0.,0,"ONLY"); 
-     gMC->Gspos("SB5B",1,"SB5P",0., yborder,0.,0,"ONLY"); 
-     gMC->Gspos("SB5B",2,"SB5P",0.,-yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S06B",1,"S06P",0., yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S06B",2,"S06P",0.,-yborder,0.,0,"ONLY"); 
-
-     // create the NULOC volume and position it in the horizontal frame
-
-     gMC->Gsvolu("S05N","BOX",knulocMaterial,nulocpar,3);
-     gMC->Gsvolu("S06N","BOX",knulocMaterial,nulocpar,3);
-     index = 0;
-     Float_t xxmax2 = xxmax - 5./2.;
-     for (xx = -xxmax; xx<=xxmax; xx+=2*knulocLength) { 
-       index++; 
-       gMC->Gspos("S05N",2*index-1,"S05B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S05N",2*index  ,"S05B", xx, 0., kbFrameWidth/4., 0, "ONLY");
-       if (xx > -xxmax2 && xx< xxmax2) {
-        gMC->Gspos("S05N",2*index-1,"SB5B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
-        gMC->Gspos("S05N",2*index  ,"SB5B", xx, 0., kbFrameWidth/4., 0, "ONLY");
-       }
-       gMC->Gspos("S06N",2*index-1,"S06B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S06N",2*index  ,"S06B", xx, 0., kbFrameWidth/4., 0, "ONLY");
-     }
-     
-     // position the volumes approximating the circular section of the pipe
-     Float_t yoffs = ksensHeight/2. - kyOverlap; 
-     Float_t epsilon = 0.001; 
-     Int_t ndiv=6;
-     Float_t divpar[3];
-     Double_t dydiv= ksensHeight/ndiv;
-     Double_t ydiv = yoffs -dydiv;
-     Int_t imax=0; 
-     imax = 1; 
-     Float_t rmin = 33.; 
-     Float_t z1 = spar[2], z2=2*spar[2]*1.01; 
-     if (gAlice->GetModule("DIPO")) {z1*=-1.;}
-     for (Int_t idiv=0;idiv<ndiv; idiv++){ 
-       ydiv+= dydiv;
-       Float_t xdiv = 0.; 
-       if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
-       divpar[0] = (kpcbLength-xdiv)/2.; 
-       divpar[1] = dydiv/2. - epsilon;
-       divpar[2] = ksensWidth/2.; 
-       Float_t xvol=(kpcbLength+xdiv)/2.+1.999;
-       Float_t yvol=ydiv + dydiv/2.; 
-       //printf ("y ll = %f y ur = %f \n",yvol - divpar[1], yvol + divpar[1]); 
-       gMC->Gsposp("S05G",imax+4*idiv+1,slats5Mother,-xvol, yvol, zoffs5-z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S06G",imax+4*idiv+1,slats6Mother,-xvol, yvol, zoffs6-z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S05G",imax+4*idiv+2,slats5Mother,-xvol,-yvol, zoffs5-z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S06G",imax+4*idiv+2,slats6Mother,-xvol,-yvol, zoffs6-z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S05G",imax+4*idiv+3,slats5Mother,+xvol, yvol, zoffs5-z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S06G",imax+4*idiv+3,slats6Mother,+xvol, yvol, zoffs6-z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S05G",imax+4*idiv+4,slats5Mother,+xvol,-yvol, zoffs5-z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S06G",imax+4*idiv+4,slats6Mother,+xvol,-yvol, zoffs6-z1+z2, 0, "ONLY",divpar,3);
-     }
-     }
-     
- if (fStations[3]) {
-
-//********************************************************************
-//                            Station 4                             **
-//********************************************************************
-     // indices 1 and 2 for first and second chambers in the station
-     // iChamber (first chamber) kept for other quanties than Z,
-     // assumed to be the same in both chambers
-     iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[6];
-     iChamber2 =(AliMUONChamber*) (*fChambers)[7];
-     zpos1=iChamber1->Z(); 
-     zpos2=iChamber2->Z();
-     dstation = TMath::Abs(zpos2 - zpos1);
-//      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2; // not used any more
-     
+// Construct geometry using geometry builders.
 //
-//   Mother volume
-     tpar[0] = iChamber->RInner()-dframep; 
-     tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
-     tpar[2] = dstation/4;
-
-     gMC->Gsvolu("S07M", "TUBE", idAir, tpar, 3);
-     gMC->Gsvolu("S08M", "TUBE", idAir, tpar, 3);
-     gMC->Gspos("S07M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
-     gMC->Gspos("S08M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
-     
 
-     const Int_t knSlats4 = 6;  // number of slats per quadrant
-     const Int_t knPCB4[knSlats4] = {4,4,5,5,4,3}; // n PCB per slat
-     const Float_t kxpos4[knSlats4] = {38.5, 40., 0., 0., 0., 0.};
-     Float_t slatLength4[knSlats4];     
-
-     // create and position the slat (mother) volumes 
-
-     char volNam7[5];
-     char volNam8[5];
-     Float_t xSlat4;
-     Float_t ySlat4;
-
-     for (i = 0; i<knSlats4; i++){
-       slatLength4[i] = kpcbLength * knPCB4[i] + 2. * kdSlatLength; 
-       xSlat4 = slatLength4[i]/2. - kvFrameLength/2. + kxpos4[i]; 
-       if (i==1) slatLength4[i] -=  2. *kdSlatLength; // frame out in PCB with circular border 
-       ySlat4 =  ksensHeight * i - kyOverlap *i;
-       
-       spar[0] = slatLength4[i]/2.; 
-       spar[1] = kslatHeight/2.;
-       spar[2] = kslatWidth/2.*1.01; 
-       Float_t dzCh4=spar[2]*1.01;
-       // zSlat to be checked (odd downstream or upstream?)
-       Float_t zSlat = (i%2 ==0)? spar[2] : -spar[2]; 
-       sprintf(volNam7,"S07%d",i);
-       gMC->Gsvolu(volNam7,"BOX",kslatMaterial,spar,3);
-       gMC->Gspos(volNam7, i*4+1,"S07M",-xSlat4, ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
-       gMC->Gspos(volNam7, i*4+2,"S07M",+xSlat4, ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
-       if (i>0) { 
-        gMC->Gspos(volNam7, i*4+3,"S07M",-xSlat4,-ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
-        gMC->Gspos(volNam7, i*4+4,"S07M",+xSlat4,-ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
-       }
-       sprintf(volNam8,"S08%d",i);
-       gMC->Gsvolu(volNam8,"BOX",kslatMaterial,spar,3);
-       gMC->Gspos(volNam8, i*4+1,"S08M",-xSlat4, ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
-       gMC->Gspos(volNam8, i*4+2,"S08M",+xSlat4, ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
-       if (i>0) { 
-        gMC->Gspos(volNam8, i*4+3,"S08M",-xSlat4,-ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
-        gMC->Gspos(volNam8, i*4+4,"S08M",+xSlat4,-ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
-       }
-     }
-     
+  for (Int_t i=0; i<fGeometryBuilders->GetEntriesFast(); i++) {
 
-     // create the panel volume 
-     gMC->Gsvolu("S07C","BOX",kpanelMaterial,panelpar,3);
-     gMC->Gsvolu("S08C","BOX",kpanelMaterial,panelpar,3);
-
-     // create the rohacell volume 
-
-     gMC->Gsvolu("S07R","BOX",krohaMaterial,rohapar,3);
-     gMC->Gsvolu("S08R","BOX",krohaMaterial,rohapar,3);
-
-     // create the insulating material volume 
+    // Get the builder
+    AliMUONVGeometryBuilder* builder
+      = (AliMUONVGeometryBuilder*)fGeometryBuilders->At(i);
 
-     gMC->Gsvolu("S07I","BOX",kinsuMaterial,insupar,3);
-     gMC->Gsvolu("S08I","BOX",kinsuMaterial,insupar,3);
-
-     // create the PCB volume 
-
-     gMC->Gsvolu("S07P","BOX",kpcbMaterial,pcbpar,3);
-     gMC->Gsvolu("S08P","BOX",kpcbMaterial,pcbpar,3);
-     // create the sensitive volumes,
-
-     gMC->Gsvolu("S07G","BOX",ksensMaterial,dum,0);
-     gMC->Gsvolu("S08G","BOX",ksensMaterial,dum,0);
-
-     // create the vertical frame volume 
-
-     gMC->Gsvolu("S07V","BOX",kvFrameMaterial,vFramepar,3);
-     gMC->Gsvolu("S08V","BOX",kvFrameMaterial,vFramepar,3);
-
-     // create the horizontal frame volume 
-
-     gMC->Gsvolu("S07H","BOX",khFrameMaterial,hFramepar,3);
-     gMC->Gsvolu("S08H","BOX",khFrameMaterial,hFramepar,3);
-
-     // create the horizontal border volume 
-
-     gMC->Gsvolu("S07B","BOX",kbFrameMaterial,bFramepar,3);
-     gMC->Gsvolu("S08B","BOX",kbFrameMaterial,bFramepar,3);
-
-     index=0; 
-     for (i = 0; i<knSlats4; i++){
-       sprintf(volNam7,"S07%d",i);
-       sprintf(volNam8,"S08%d",i);
-       Float_t xvFrame  = (slatLength4[i] - kvFrameLength)/2.;
-       // position the vertical frames 
-       if (i!=1 && i!=0) { 
-        gMC->Gspos("S07V",2*i-1,volNam7, xvFrame, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S07V",2*i  ,volNam7,-xvFrame, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S08V",2*i-1,volNam8, xvFrame, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S08V",2*i  ,volNam8,-xvFrame, 0., 0. , 0, "ONLY");
-       }
-       // position the panels and the insulating material 
-       for (j=0; j<knPCB4[i]; j++){
-        index++;
-        Float_t xx = ksensLength * (-knPCB4[i]/2.+j+.5); 
-
-        Float_t zPanel = spar[2] - panelpar[2]; 
-        gMC->Gspos("S07C",2*index-1,volNam7, xx, 0., zPanel , 0, "ONLY");
-        gMC->Gspos("S07C",2*index  ,volNam7, xx, 0.,-zPanel , 0, "ONLY");
-        gMC->Gspos("S08C",2*index-1,volNam8, xx, 0., zPanel , 0, "ONLY");
-        gMC->Gspos("S08C",2*index  ,volNam8, xx, 0.,-zPanel , 0, "ONLY");
-
-        gMC->Gspos("S07I",index,volNam7, xx, 0., 0 , 0, "ONLY");
-        gMC->Gspos("S08I",index,volNam8, xx, 0., 0 , 0, "ONLY");
-       } 
-     }
-
-     // position the rohacell volume inside the panel volume
-     gMC->Gspos("S07R",1,"S07C",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S08R",1,"S08C",0.,0.,0.,0,"ONLY"); 
-
-     // position the PCB volume inside the insulating material volume
-     gMC->Gspos("S07P",1,"S07I",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S08P",1,"S08I",0.,0.,0.,0,"ONLY"); 
-     // position the horizontal frame volume inside the PCB volume
-     gMC->Gspos("S07H",1,"S07P",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S08H",1,"S08P",0.,0.,0.,0,"ONLY"); 
-     // position the sensitive volume inside the horizontal frame volume
-     gMC->Gsposp("S07G",1,"S07H",0.,0.,0.,0,"ONLY",senspar,3); 
-     gMC->Gsposp("S08G",1,"S08H",0.,0.,0.,0,"ONLY",senspar,3); 
-     // position the border volumes inside the PCB volume
-     Float_t yborder = ( kpcbHeight - kbFrameHeight ) / 2.; 
-     gMC->Gspos("S07B",1,"S07P",0., yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S07B",2,"S07P",0.,-yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S08B",1,"S08P",0., yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S08B",2,"S08P",0.,-yborder,0.,0,"ONLY"); 
-
-     // create the NULOC volume and position it in the horizontal frame
-
-     gMC->Gsvolu("S07N","BOX",knulocMaterial,nulocpar,3);
-     gMC->Gsvolu("S08N","BOX",knulocMaterial,nulocpar,3);
-     index = 0;
-     for (xx = -xxmax; xx<=xxmax; xx+=2*knulocLength) { 
-       index++; 
-       gMC->Gspos("S07N",2*index-1,"S07B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S07N",2*index  ,"S07B", xx, 0., kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S08N",2*index-1,"S08B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S08N",2*index  ,"S08B", xx, 0., kbFrameWidth/4., 0, "ONLY");
-     }
-
-     // position the volumes approximating the circular section of the pipe
-     Float_t yoffs = ksensHeight/2. - kyOverlap; 
-     Float_t epsilon = 0.001; 
-     Int_t ndiv=6;
-     Float_t divpar[3];
-     Double_t dydiv= ksensHeight/ndiv;
-     Double_t ydiv = yoffs -dydiv;
-     Int_t imax=0; 
-     imax = 1; 
-     Float_t rmin = 40.; 
-     Float_t z1 = -spar[2], z2=2*spar[2]*1.01; 
-     for (Int_t idiv=0;idiv<ndiv; idiv++){ 
-       ydiv+= dydiv;
-       Float_t xdiv = 0.; 
-       if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
-       divpar[0] = (kpcbLength-xdiv)/2.; 
-       divpar[1] = dydiv/2. - epsilon;
-       divpar[2] = ksensWidth/2.; 
-       Float_t xvol=(kpcbLength+xdiv)/2.+1.999;
-       Float_t yvol=ydiv + dydiv/2.;
-       gMC->Gsposp("S07G",imax+4*idiv+1,"S07M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S08G",imax+4*idiv+1,"S08M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S07G",imax+4*idiv+2,"S07M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S08G",imax+4*idiv+2,"S08M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S07G",imax+4*idiv+3,"S07M", xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S08G",imax+4*idiv+3,"S08M", xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S07G",imax+4*idiv+4,"S07M", xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S08G",imax+4*idiv+4,"S08M", xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
-     }
-
-
-
-
-
- }
-
- if (fStations[4]) {
-     
-
-//********************************************************************
-//                            Station 5                             **
-//********************************************************************
-     // indices 1 and 2 for first and second chambers in the station
-     // iChamber (first chamber) kept for other quanties than Z,
-     // assumed to be the same in both chambers
-     iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[8];
-     iChamber2 =(AliMUONChamber*) (*fChambers)[9];
-     zpos1=iChamber1->Z(); 
-     zpos2=iChamber2->Z();
-     dstation = TMath::Abs(zpos2 - zpos1);
-//      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2; // not used any more
-     
-//
-//   Mother volume
-     tpar[0] = iChamber->RInner()-dframep; 
-     tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
-     tpar[2] = dstation/5.;
-
-     gMC->Gsvolu("S09M", "TUBE", idAir, tpar, 3);
-     gMC->Gsvolu("S10M", "TUBE", idAir, tpar, 3);
-     gMC->Gspos("S09M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
-     gMC->Gspos("S10M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
-
-
-     const Int_t knSlats5 = 7;  // number of slats per quadrant
-     const Int_t knPCB5[knSlats5] = {5,5,6,6,5,4,3}; // n PCB per slat
-     const Float_t kxpos5[knSlats5] = {38.5, 40., 0., 0., 0., 0., 0.};
-     Float_t slatLength5[knSlats5]; 
-     char volNam9[5];
-     char volNam10[5];
-     Float_t xSlat5;
-     Float_t ySlat5;
-
-     for (i = 0; i<knSlats5; i++){
-       slatLength5[i] = kpcbLength * knPCB5[i] + 2. * kdSlatLength; 
-       xSlat5 = slatLength5[i]/2. - kvFrameLength/2. +kxpos5[i]; 
-       if (i==1 || i==0) slatLength5[i] -=  2. *kdSlatLength; // frame out in PCB with circular border 
-       ySlat5 = ksensHeight * i - kyOverlap * i; 
-       spar[0] = slatLength5[i]/2.; 
-       spar[1] = kslatHeight/2.;
-       spar[2] = kslatWidth/2. * 1.01; 
-       Float_t dzCh5=spar[2]*1.01;
-       // zSlat to be checked (odd downstream or upstream?)
-       Float_t zSlat = (i%2 ==0)? -spar[2] : spar[2]; 
-       sprintf(volNam9,"S09%d",i);
-       gMC->Gsvolu(volNam9,"BOX",kslatMaterial,spar,3);
-       gMC->Gspos(volNam9, i*4+1,"S09M",-xSlat5, ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
-       gMC->Gspos(volNam9, i*4+2,"S09M",+xSlat5, ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
-       if (i>0) { 
-          gMC->Gspos(volNam9, i*4+3,"S09M",-xSlat5,-ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
-          gMC->Gspos(volNam9, i*4+4,"S09M",+xSlat5,-ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
-       }
-       sprintf(volNam10,"S10%d",i);
-       gMC->Gsvolu(volNam10,"BOX",kslatMaterial,spar,3);
-       gMC->Gspos(volNam10, i*4+1,"S10M",-xSlat5, ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
-       gMC->Gspos(volNam10, i*4+2,"S10M",+xSlat5, ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
-       if (i>0) { 
-          gMC->Gspos(volNam10, i*4+3,"S10M",-xSlat5,-ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
-          gMC->Gspos(volNam10, i*4+4,"S10M",+xSlat5,-ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
-       }
-     }
-
-     // create the panel volume 
-     gMC->Gsvolu("S09C","BOX",kpanelMaterial,panelpar,3);
-     gMC->Gsvolu("S10C","BOX",kpanelMaterial,panelpar,3);
+    // Create geometry with each builder
+    if (builder) {
+      builder->CreateGeometry();
+      builder->SetTransformations();
+    }
+  }
 
-     // create the rohacell volume 
+  for (Int_t j=0; j<AliMUONConstants::NCh(); j++) {
 
-     gMC->Gsvolu("S09R","BOX",krohaMaterial,rohapar,3);
-     gMC->Gsvolu("S10R","BOX",krohaMaterial,rohapar,3);
+    AliMUONChamberGeometry* geometry = Chamber(j).GetGeometry();
 
-     // create the insulating material volume 
+    if (!geometry) continue;
+          // Skip chambers with not defined geometry  
+         
+    // Loop over envelopes
+    const TObjArray* kEnvelopes = geometry->GetEnvelopes();
+    for (Int_t k=0; k<kEnvelopes->GetEntriesFast(); k++) {
+
+      // Get envelope
+      AliMUONGeometryEnvelope* env = (AliMUONGeometryEnvelope*)kEnvelopes->At(k);
+      const TGeoCombiTrans* kEnvTrans = env->GetTransformation();
+
+      if (env->IsVirtual() && env->GetConstituents()->GetEntriesFast() == 0 ) {
+        // virtual envelope + nof constituents = 0 
+        //         => not allowed;
+        //            empty virtual envelope has no sense 
+        Fatal("CreateGeometry", "Virtual envelope must have constituents.");
+        return;
+      }
 
-     gMC->Gsvolu("S09I","BOX",kinsuMaterial,insupar,3);
-     gMC->Gsvolu("S10I","BOX",kinsuMaterial,insupar,3);
+      if (!env->IsVirtual() && env->GetConstituents()->GetEntriesFast() > 0 ) {
+        // non virtual envelope + nof constituents > 0 
+        //        => not allowed;
+        //           use VMC to place constituents
+        Fatal("CreateGeometry", "Non virtual envelope cannot have constituents.");
+        return;
+      }
 
-     // create the PCB volume 
+      if (!env->IsVirtual() && env->GetConstituents()->GetEntriesFast() == 0 ) {
+        // non virtual envelope + nof constituents = 0 
+        //        => place envelope in ALICE by composed transformation:
+        //           Tglobal * Tch * Tenv
+
+        // Compound chamber transformation with the envelope one
+        TGeoHMatrix total 
+         = (*fGlobalTransformation) * 
+           (*geometry->GetTransformation()) * 
+           (*kEnvTrans);
+        PlaceVolume(env->GetName(), geometry->GetMotherVolume(),
+                   env->GetCopyNo(), total, 0, 0);
+      }
 
-     gMC->Gsvolu("S09P","BOX",kpcbMaterial,pcbpar,3);
-     gMC->Gsvolu("S10P","BOX",kpcbMaterial,pcbpar,3);
-     // create the sensitive volumes,
-
-     gMC->Gsvolu("S09G","BOX",ksensMaterial,dum,0);
-     gMC->Gsvolu("S10G","BOX",ksensMaterial,dum,0);
-
-     // create the vertical frame volume 
-
-     gMC->Gsvolu("S09V","BOX",kvFrameMaterial,vFramepar,3);
-     gMC->Gsvolu("S10V","BOX",kvFrameMaterial,vFramepar,3);
-
-     // create the horizontal frame volume 
-
-     gMC->Gsvolu("S09H","BOX",khFrameMaterial,hFramepar,3);
-     gMC->Gsvolu("S10H","BOX",khFrameMaterial,hFramepar,3);
-
-     // create the horizontal border volume 
-
-     gMC->Gsvolu("S09B","BOX",kbFrameMaterial,bFramepar,3);
-     gMC->Gsvolu("S10B","BOX",kbFrameMaterial,bFramepar,3);
-
-     index=0; 
-     for (i = 0; i<knSlats5; i++){
-       sprintf(volNam9,"S09%d",i);
-       sprintf(volNam10,"S10%d",i);
-       Float_t xvFrame  = (slatLength5[i] - kvFrameLength)/2.;
-       // position the vertical frames 
-       if (i!=1 && i!=0) { 
-        gMC->Gspos("S09V",2*i-1,volNam9, xvFrame, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S09V",2*i  ,volNam9,-xvFrame, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S10V",2*i-1,volNam10, xvFrame, 0., 0. , 0, "ONLY");
-        gMC->Gspos("S10V",2*i  ,volNam10,-xvFrame, 0., 0. , 0, "ONLY");
-       }
-       
-       // position the panels and the insulating material 
-       for (j=0; j<knPCB5[i]; j++){
-        index++;
-        Float_t xx = ksensLength * (-knPCB5[i]/2.+j+.5); 
-
-        Float_t zPanel = spar[2] - panelpar[2]; 
-        gMC->Gspos("S09C",2*index-1,volNam9, xx, 0., zPanel , 0, "ONLY");
-        gMC->Gspos("S09C",2*index  ,volNam9, xx, 0.,-zPanel , 0, "ONLY");
-        gMC->Gspos("S10C",2*index-1,volNam10, xx, 0., zPanel , 0, "ONLY");
-        gMC->Gspos("S10C",2*index  ,volNam10, xx, 0.,-zPanel , 0, "ONLY");
-
-        gMC->Gspos("S09I",index,volNam9, xx, 0., 0 , 0, "ONLY");
-        gMC->Gspos("S10I",index,volNam10, xx, 0., 0 , 0, "ONLY");
-       } 
-     }
-
-     // position the rohacell volume inside the panel volume
-     gMC->Gspos("S09R",1,"S09C",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S10R",1,"S10C",0.,0.,0.,0,"ONLY"); 
-
-     // position the PCB volume inside the insulating material volume
-     gMC->Gspos("S09P",1,"S09I",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S10P",1,"S10I",0.,0.,0.,0,"ONLY"); 
-     // position the horizontal frame volume inside the PCB volume
-     gMC->Gspos("S09H",1,"S09P",0.,0.,0.,0,"ONLY"); 
-     gMC->Gspos("S10H",1,"S10P",0.,0.,0.,0,"ONLY"); 
-     // position the sensitive volume inside the horizontal frame volume
-     gMC->Gsposp("S09G",1,"S09H",0.,0.,0.,0,"ONLY",senspar,3); 
-     gMC->Gsposp("S10G",1,"S10H",0.,0.,0.,0,"ONLY",senspar,3); 
-     // position the border volumes inside the PCB volume
-     Float_t yborder = ( kpcbHeight - kbFrameHeight ) / 2.; 
-     gMC->Gspos("S09B",1,"S09P",0., yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S09B",2,"S09P",0.,-yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S10B",1,"S10P",0., yborder,0.,0,"ONLY"); 
-     gMC->Gspos("S10B",2,"S10P",0.,-yborder,0.,0,"ONLY"); 
-
-     // create the NULOC volume and position it in the horizontal frame
-
-     gMC->Gsvolu("S09N","BOX",knulocMaterial,nulocpar,3);
-     gMC->Gsvolu("S10N","BOX",knulocMaterial,nulocpar,3);
-     index = 0;
-     for (xx = -xxmax; xx<=xxmax; xx+=2*knulocLength) { 
-       index++; 
-       gMC->Gspos("S09N",2*index-1,"S09B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S09N",2*index  ,"S09B", xx, 0., kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S10N",2*index-1,"S10B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
-       gMC->Gspos("S10N",2*index  ,"S10B", xx, 0., kbFrameWidth/4., 0, "ONLY");
-     }
-     // position the volumes approximating the circular section of the pipe
-     Float_t yoffs = ksensHeight/2. - kyOverlap; 
-     Float_t epsilon = 0.001; 
-     Int_t ndiv=6;
-     Float_t divpar[3];
-     Double_t dydiv= ksensHeight/ndiv;
-     Double_t ydiv = yoffs -dydiv;
-     Int_t imax=0; 
-     //     for (Int_t islat=0; islat<knSlats3; islat++) imax += knPCB3[islat]; 
-     imax = 1; 
-     Float_t rmin = 40.; 
-     Float_t z1 = spar[2], z2=2*spar[2]*1.01; 
-     for (Int_t idiv=0;idiv<ndiv; idiv++){ 
-       ydiv+= dydiv;
-       Float_t xdiv = 0.; 
-       if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
-       divpar[0] = (kpcbLength-xdiv)/2.; 
-       divpar[1] = dydiv/2. - epsilon;
-       divpar[2] = ksensWidth/2.; 
-       Float_t xvol=(kpcbLength+xdiv)/2. + 1.999;
-       Float_t yvol=ydiv + dydiv/2.;
-       gMC->Gsposp("S09G",imax+4*idiv+1,"S09M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S10G",imax+4*idiv+1,"S10M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S09G",imax+4*idiv+2,"S09M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S10G",imax+4*idiv+2,"S10M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S09G",imax+4*idiv+3,"S09M", +xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S10G",imax+4*idiv+3,"S10M", +xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S09G",imax+4*idiv+4,"S09M", +xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
-       gMC->Gsposp("S10G",imax+4*idiv+4,"S10M", +xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
-     }
-
- }
-//********************************************************************
-//                            Trigger                               **
-//******************************************************************** 
- /* 
-    zpos1 and zpos2 are the middle of the first and second
-    planes of station 1 (+1m for second station):
-    zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
-    zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
-    zposxm and zposxp= middles of gaz gaps within a detection plane
-    rem: the total thickness accounts for 1 mm of al on both
-    side of the RPCs (see zpos1 and zpos2)
- */
-
-// vertical gap between right and left chambers (kDXZERO*2=4cm)
- const Float_t kDXZERO=2.; 
-// main distances for chamber definition in first plane/first station
- const Float_t kXMIN=34.;       
- const Float_t kXMED=51.;                                
- const Float_t kXMAX=272.; 
-// kXMAX will become 255. in real life. segmentation to be updated accordingly
-// (see fig.2-4 & 2-5 of Local Trigger Board PRR)
- const Float_t kYMIN=34.;                              
- const Float_t kYMAX=51.;                              
-// inner/outer radius of flange between beam shield. and chambers (1/station)
- const Float_t kRMIN[2]={50.,50.};
- const Float_t kRMAX[2]={64.,68.};
-// z position of the middle of the gas gap in mother vol 
- const Float_t kZm=-3.6;
- const Float_t kZp=+3.6;     
- iChamber1 = (AliMUONChamber*) (*fChambers)[10];     
- zpos1 = iChamber1->Z();
+      if (env->IsVirtual() && env->GetConstituents()->GetEntriesFast() > 0 ) {
+        // virtual envelope + nof constituents > 0 
+        //         => do not place envelope and place constituents
+        //            in ALICE by composed transformation:
+        //            Tglobal * Tch * Tenv * Tconst   
+
+        for  (Int_t l=0; l<env->GetConstituents()->GetEntriesFast(); l++) {
+          AliMUONGeometryConstituent* constituent
+            = (AliMUONGeometryConstituent*)env->GetConstituents()->At(l);
+
+          // Compound chamber transformation with the envelope one + the constituent one
+          TGeoHMatrix total 
+           = (*fGlobalTransformation) *
+             (*geometry->GetTransformation()) * 
+             (*kEnvTrans) * 
+             (*constituent->GetTransformation());
+
+          PlaceVolume(constituent->GetName(), geometry->GetMotherVolume(),
+                     constituent->GetCopyNo(), total,
+                      constituent->GetNpar(), constituent->GetParam());
+        }
+      }
+    } 
+  }
+}
+//__________________________________________________________________
+Int_t  AliMUONv1::GetChamberId(Int_t volId) const
+{
+// Check if the volume with specified  volId is a sensitive volume (gas) 
+// of some chamber and returns the chamber number;
+// if not sensitive volume - return 0.
+// ---
 
-// ratio of zpos1m/zpos1p and inverse for first plane
- Float_t zmp=(zpos1+3.6)/(zpos1-3.6);
- Float_t zpm=1./zmp;
- Int_t icount=0; // chamber counter (0 1 2 3)
- for (Int_t istation=0; istation<2; istation++) { // loop on stations   
-     for (Int_t iplane=0; iplane<2; iplane++) {          // loop on detection planes
-        
-        Int_t iVolNum=1; // counter Volume Number
-        icount = Int_t(iplane*TMath::Power(2,0))+
-            Int_t(istation*TMath::Power(2,1));
-        
-        char volPlane[5]; 
-        sprintf(volPlane,"SM%d%d",istation+1,iplane+1);
-        
-        iChamber = (AliMUONChamber*) (*fChambers)[10+icount];
-        Float_t zpos = iChamber->Z();       
-        
-// mother volume 
-        tpar[0] = iChamber->RInner(); 
-        tpar[1] = iChamber->ROuter(); 
-        tpar[2] = 4.0;    
-        gMC->Gsvolu(volPlane,"TUBE",idAir,tpar,3);
-        
-// Flange between beam shielding and RPC 
-        tpar[0]= kRMIN[istation];
-        tpar[1]= kRMAX[istation];
-        tpar[2]= 4.0;
-        
-        char volFlange[5];
-        sprintf(volFlange,"SF%dA",icount+1);    
-        gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     //Al
-        gMC->Gspos(volFlange,1,volPlane,0.,0.,0.,0,"MANY");
-        
-// scaling factor
-        Float_t zRatio = zpos / zpos1;
-        
-// chamber prototype
-        tpar[0]= 0.;
-        tpar[1]= 0.;
-        tpar[2]= 0.;
-        
-        char volAlu[5]; // Alu
-        char volBak[5]; // Bakelite
-        char volGaz[5]; // Gas streamer
-        
-        sprintf(volAlu,"SC%dA",icount+1);
-        sprintf(volBak,"SB%dA",icount+1);
-        sprintf(volGaz,"SG%dA",icount+1);
-        
-        gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);           // Al
-        gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);     // Bakelite
-        gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);     // Gas streamer
-        
-// chamber type A
-        tpar[0] = -1.;
-        tpar[1] = -1.;
-        
-        Float_t xA=(kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
-        Float_t yAm=0.;
-        Float_t yAp=0.;
-        
-        tpar[2] = 0.1;    
-        gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
-        tpar[2] = 0.3;
-        gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
-        
-        tpar[2] = 0.4;
-        tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
-        tpar[1] = kYMIN*zRatio;
-        
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xA,yAm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xA,yAp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsbool(volAlu,volFlange);
-        
-// chamber type B    
-        Float_t tpar1save=tpar[1];
-        Float_t y1msave=yAm;
-        Float_t y1psave=yAp;
-        
-        tpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
-        tpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
-        
-        Float_t xB=(kDXZERO+kXMIN)*zRatio+tpar[0];
-        Float_t yBp=(y1msave+tpar1save)*zpm+tpar[1];
-        Float_t yBm=(y1psave+tpar1save)*zmp+tpar[1];    
-
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xB, yBp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xB, yBm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xB,-yBp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xB,-yBm,-kZm,0,"ONLY",tpar,3);
-        
-// chamber type C (note : same Z than type B)
-        tpar1save=tpar[1];
-        y1msave=yBm;
-        y1psave=yBp;
-        
-        tpar[0] = (kXMAX/2)*zRatio;
-        tpar[1] = (kYMAX/2)*zRatio;
-        
-        Float_t xC=kDXZERO*zRatio+tpar[0];
-        Float_t yCp=(y1psave+tpar1save)*1.+tpar[1];
-        Float_t yCm=(y1msave+tpar1save)*1.+tpar[1];
-        
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,-xC, yCp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, xC, yCm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,-xC,-yCp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, xC,-yCm,-kZm,0,"ONLY",tpar,3);
-                
-// chamber type D, E and F (same size)        
-        tpar1save=tpar[1];
-        y1msave=yCm;
-        y1psave=yCp;
-        
-        tpar[0] = (kXMAX/2.)*zRatio;
-        tpar[1] =  kYMIN*zRatio;
-        
-        Float_t xD=kDXZERO*zRatio+tpar[0];
-        Float_t yDp=(y1msave+tpar1save)*zpm+tpar[1];
-        Float_t yDm=(y1psave+tpar1save)*zmp+tpar[1];
-        
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yDm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yDp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yDm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yDp,-kZp,0,"ONLY",tpar,3);
-        
-        tpar1save=tpar[1];
-        y1msave=yDm;
-        y1psave=yDp;
-        Float_t yEp=(y1msave+tpar1save)*zpm+tpar[1];
-        Float_t yEm=(y1psave+tpar1save)*zmp+tpar[1];
-        
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yEp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yEm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yEp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yEm,-kZm,0,"ONLY",tpar,3);
-        
-        tpar1save=tpar[1];
-        y1msave=yEm;
-        y1psave=yEp;
-        Float_t yFp=(y1msave+tpar1save)*zpm+tpar[1];
-        Float_t yFm=(y1psave+tpar1save)*zmp+tpar[1];
-        
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yFm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yFp,-kZp,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yFm,-kZm,0,"ONLY",tpar,3);
-        gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yFp,-kZp,0,"ONLY",tpar,3);
-
-// Positioning plane in ALICE     
-        gMC->Gspos(volPlane,1,"ALIC",0.,0.,zpos,0,"ONLY");
-        
-     } // end loop on detection planes
- } // end loop on stations
+/*
+  for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++)
+    if (volId==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()) return i;
+*/
+  for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++)
+    if ( ((AliMUONChamber*)(*fChambers)[i-1])->IsSensId(volId) ) return i;
 
+  return 0;
 }
-
-//___________________________________________
+//________________________________________________________________
 void AliMUONv1::CreateMaterials()
 {
+
   // *** DEFINITION OF AVAILABLE MUON MATERIALS *** 
   //
   //     Ar-CO2 gas (80%+20%)
@@ -1575,10 +344,94 @@ void AliMUONv1::CreateMaterials()
              fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
     AliMedium(14, "Rohacell          ", 34, 0, iSXFLD, sXMGMX, tmaxfd, 
              fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
+
+
+
+  //.Materials specific to stations
+  // created via builders
+  
+  for (Int_t i=0; i<fGeometryBuilders->GetEntriesFast(); i++) {
+
+    // Get the builder
+    AliMUONVGeometryBuilder* builder
+      = (AliMUONVGeometryBuilder*)fGeometryBuilders->At(i);
+
+    // Create materials with each builder
+    if (builder) builder->CreateMaterials();
+  }
 }
 
-//___________________________________________
+//______________________________________________________________________________
+void AliMUONv1::PlaceVolume(const TString& name, const TString& mName, 
+                            Int_t copyNo, const TGeoHMatrix& matrix, 
+                           Int_t npar, Double_t* param) const
+{
+// Place the volume specified by name with the given transformation matrix
+// ---
+
+  // Do not apply global transformation 
+  // if mother volume == DDIP
+  // (as it is applied on this volume)
+  TGeoHMatrix transform(matrix);
+  if (mName == TString("DDIP")) {
+    transform = (*fGlobalTransformation) * transform;
+               // To be changed to (*fGlobalTransformation).inverse()
+              // when available in TGeo
+              // To make this correct also for a general case when
+              // (*fGlobalTransformation) * *fGlobalTransformation) != 1
+  }           
+     
+  // Decompose transformation
+  const Double_t* xyz = transform.GetTranslation();
+  const Double_t* rm = transform.GetRotationMatrix();
+       
+  //cout << "Got translation: "
+  //     << xyz[0] << " " << xyz[1] << " " << xyz[2] << endl;
+       
+  //cout << "Got rotation: "
+  //     << rm[0] << " " << rm[1] << " " << rm[2] << endl
+  //     << rm[3] << " " << rm[4] << " " << rm[5] << endl
+  //     << rm[6] << " " << rm[7] << " " << rm[8] << endl;
+
+  // Check for presence of rotation
+  // (will be nice to be available in TGeo)
+  const Double_t kTolerance = 1e-04;
+  Bool_t isRotation = true; 
+  if (TMath::Abs(rm[0] - 1.) < kTolerance &&
+      TMath::Abs(rm[1] - 0.) < kTolerance &&
+      TMath::Abs(rm[2] - 0.) < kTolerance &&
+      TMath::Abs(rm[3] - 0.) < kTolerance &&
+      TMath::Abs(rm[4] - 1.) < kTolerance &&
+      TMath::Abs(rm[5] - 0.) < kTolerance &&
+      TMath::Abs(rm[6] - 0.) < kTolerance &&
+      TMath::Abs(rm[7] - 0.) < kTolerance &&
+      TMath::Abs(rm[8] - 1.) < kTolerance) isRotation = false; 
+
+  Int_t krot = 0;
+  if (isRotation) {
+    TGeoRotation rot;
+    rot.SetMatrix(const_cast<Double_t*>(transform.GetRotationMatrix()));
+    Double_t theta1, phi1, theta2, phi2, theta3, phi3;
+    rot.GetAngles(theta1, phi1, theta2, phi2, theta3, phi3);
+       
+    //cout << "angles: " 
+    //     << theta1 << " " << phi1 << " "
+    //     << theta2 << " " << phi2 << " "
+    //     << theta3 << " " << phi3 << endl;
+       
+    AliMatrix(krot, theta1, phi1, theta2, phi2, theta3, phi3);
+  }    
+       
+  // Place the volume in ALIC
+  if (npar == 0) 
+    gMC->Gspos(name, copyNo, mName, xyz[0], xyz[1], xyz[2] , krot, "ONLY");
+  else 
+    gMC->Gsposp(name, copyNo, mName, xyz[0], xyz[1], xyz[2] , krot, "ONLY",
+                param, npar);
+
+} 
 
+//___________________________________________
 void AliMUONv1::Init()
 {
    // 
@@ -1591,6 +444,20 @@ void AliMUONv1::Init()
        ( (AliMUONChamber*) (*fChambers)[i])->Init();
    }
    
+   //
+   // Set the chamber (sensitive region) GEANT identifier
+   //
+   for (Int_t i=0; i<fGeometryBuilders->GetEntriesFast(); i++) {
+
+    // Get the builder
+    AliMUONVGeometryBuilder* builder
+      = (AliMUONVGeometryBuilder*)fGeometryBuilders->At(i);
+
+    // Set sesitive volumes with each builder
+    if (builder) builder->SetSensitiveVolumes();
+  }
+
+/*
    //
    // Set the chamber (sensitive region) GEANT identifier
    ((AliMUONChamber*)(*fChambers)[0])->SetGid(gMC->VolId("S01G"));
@@ -1612,7 +479,7 @@ void AliMUONv1::Init()
    ((AliMUONChamber*)(*fChambers)[11])->SetGid(gMC->VolId("SG2A"));
    ((AliMUONChamber*)(*fChambers)[12])->SetGid(gMC->VolId("SG3A"));
    ((AliMUONChamber*)(*fChambers)[13])->SetGid(gMC->VolId("SG4A"));
-
+*/
    if(fDebug) printf("\n%s: Finished Init for version 1 - CPC chamber type\n",ClassName());
 
    //cp 
@@ -1622,22 +489,8 @@ void AliMUONv1::Init()
    }
    if(fDebug) printf("%s: Finished Init for Trigger Circuits\n",ClassName());
    //cp
-
 }
 
-//_______________________________________________________________________________
-Int_t  AliMUONv1::GetChamberId(Int_t volId) const
-{
-// Check if the volume with specified  volId is a sensitive volume (gas) 
-// of some chamber and returns the chamber number;
-// if not sensitive volume - return 0.
-// ---
-
-  for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++)
-    if (volId==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()) return i;
-
-  return 0;
-}
 //_______________________________________________________________________________
 void AliMUONv1::StepManager()
 {
@@ -1654,23 +507,21 @@ void AliMUONv1::StepManager()
   
   // Only gas gap inside chamber
   // Tag chambers and record hits when track enters 
-  Int_t   idvol=-1;
+  static Int_t   idvol=-1;
   Int_t   iChamber=0;
   Int_t   id=0;
   Int_t   copy;
   const  Float_t kBig = 1.e10;
 
+
+  //
+  // Only gas gap inside chamber
+  // Tag chambers and record hits when track enters 
   id=gMC->CurrentVolID(copy);
-  // printf("id == %d \n",id);
-  for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++) {
-    if(id==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()) {
-      iChamber = i;
-      idvol  = i-1;
-    }
-  }
-  if (idvol == -1) {
-    return;
-  }
+  iChamber = GetChamberId(id);
+  idvol = iChamber -1;
+
+  if (idvol == -1) return;
 
    if( gMC->IsTrackEntering() ) {
      Float_t theta = fTrackMomentum.Theta();
@@ -1692,7 +543,7 @@ void AliMUONv1::StepManager()
   
 //   if (GetDebug()) {
 //     Info("StepManager Step","iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
-//      iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg, mass, fStepSum[idvol], gMC->Edep());
+//       iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg, mass, fStepSum[idvol], gMC->Edep());
 //     Info("StepManager Step","Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(), fTrackMomentum.Z()) ;
 //     gMC->TrackPosition(fTrackPosition);
 //     Info("StepManager Step","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
@@ -1705,16 +556,16 @@ void AliMUONv1::StepManager()
        (fStepSum[idvol]>fStepMaxInActiveGas) ) {
     
     if   ( gMC->IsTrackExiting() || 
-          gMC->IsTrackStop() || 
-          gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
+           gMC->IsTrackStop() || 
+           gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
 
     gMC->TrackPosition(fTrackPosition);
     Float_t theta = fTrackMomentum.Theta();
     Float_t phi   = fTrackMomentum.Phi();
     
     TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi),
-                              fStepSum[idvol]/2.*sin(theta)*sin(phi),
-                              fStepSum[idvol]/2.*cos(theta),0.0       );
+                               fStepSum[idvol]/2.*sin(theta)*sin(phi),
+                               fStepSum[idvol]/2.*cos(theta),0.0       );
     //     if (GetDebug()) 
     //       Info("StepManager Exit","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
     //     if (GetDebug()) 
@@ -1741,16 +592,16 @@ void AliMUONv1::StepManager()
       // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
       sigmaEffectThetadegrees =  sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg);  // For 5mm gap  
       if ( (iChamber==1)  ||  (iChamber==2) )  
-       sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
+        sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
       yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
     }
     }
     
     // One hit per chamber
     GetMUONData()->AddHit(fIshunt, gAlice->GetMCApp()->GetCurrentTrackNumber(), iChamber, ipart, 
-                         fTrackPosition.X(), fTrackPosition.Y()+yAngleEffect, fTrackPosition.Z(), 0.0, 
-                         fTrackMomentum.P(),theta, phi, fStepSum[idvol], fDestepSum[idvol],
-                         fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z());
+                          fTrackPosition.X(), fTrackPosition.Y()+yAngleEffect, fTrackPosition.Z(), 0.0, 
+                          fTrackMomentum.P(),theta, phi, fStepSum[idvol], fDestepSum[idvol],
+                          fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z());
 //     if (GetDebug()){
 //       Info("StepManager Exit","Particle exiting from chamber %d",iChamber);
 //       Info("StepManager Exit","StepSum %f eloss geant %g ",fStepSum[idvol],fDestepSum[idvol]);
@@ -1766,7 +617,7 @@ void AliMUONv1::StepManagerOld()
 {
   // Old Stepmanager for the chambers
   Int_t          copy, id;
-  static Int_t   idvol;
+  static Int_t   idvol =-1;
   static Int_t   vol[2];
   Int_t          ipart;
   TLorentzVector pos;
@@ -1818,8 +669,8 @@ void AliMUONv1::StepManagerOld()
       Double_t ty = mom[1]/pmom;
       Double_t tz = mom[2]/pmom;
       Double_t s  = ((AliMUONChamber*)(*fChambers)[idvol])
-         ->ResponseModel()
-         ->Pitch()/tz;
+          ->ResponseModel()
+          ->Pitch()/tz;
       theta   = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
       phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
       hits[0] = Float_t(ipart);         // Geant3 particle type
@@ -1853,13 +704,13 @@ void AliMUONv1::StepManagerOld()
       
 
      //  if(idvol < AliMUONConstants::NTrackingCh()) {
-//       //
-//       //  Initialize hit position (cursor) in the segmentation model 
-//       ((AliMUONChamber*) (*fChambers)[idvol])
-//           ->SigGenInit(pos[0], pos[1], pos[2]);
+//        //
+//        //  Initialize hit position (cursor) in the segmentation model 
+//        ((AliMUONChamber*) (*fChambers)[idvol])
+//            ->SigGenInit(pos[0], pos[1], pos[2]);
 //       } else {
-//       //geant3->Gpcxyz();
-//       //printf("In the Trigger Chamber #%d\n",idvol-9);
+//        //geant3->Gpcxyz();
+//        //printf("In the Trigger Chamber #%d\n",idvol-9);
 //       }
   }
   eloss2+=destep;
@@ -1883,33 +734,33 @@ void AliMUONv1::StepManagerOld()
 
       if(idvol < AliMUONConstants::NTrackingCh()) {
 // tracking chambers
-         x0 = 0.5*(xhit+pos[0]);
-         y0 = 0.5*(yhit+pos[1]);
-         z0 = 0.5*(zhit+pos[2]);
+          x0 = 0.5*(xhit+pos[0]);
+          y0 = 0.5*(yhit+pos[1]);
+          z0 = 0.5*(zhit+pos[2]);
       } else {
 // trigger chambers
-         x0 = xhit;
-         y0 = yhit;
-         z0 = 0.;
+          x0 = xhit;
+          y0 = yhit;
+          z0 = 0.;
       }
       
 
       //      if (eloss >0)  MakePadHits(x0,y0,z0,eloss,tof,idvol);
       
-         
+          
       hits[6] = tlength;   // track length
       hits[7] = eloss2;    // de/dx energy loss
 
 
       //      if (fNPadHits > (Int_t)hits[8]) {
-      //         hits[8] = hits[8]+1;
-      //         hits[9] = 0: // PadHits does not exist anymore (Float_t) fNPadHits;
+      //          hits[8] = hits[8]+1;
+      //          hits[9] = 0: // PadHits does not exist anymore (Float_t) fNPadHits;
       //}
 //
 //    new hit 
       
       new(lhits[fNhits++]) 
-         AliMUONHit(fIshunt, gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
+          AliMUONHit(fIshunt, gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
       eloss = 0; 
       //
       // Check additional signal generation conditions 
@@ -1921,7 +772,7 @@ void AliMUONv1::StepManagerOld()
        ((AliMUONChamber*) (*fChambers)[idvol])->SigGenCond(pos[0], pos[1], pos[2]))
   {
       ((AliMUONChamber*) (*fChambers)[idvol])
-         ->SigGenInit(pos[0], pos[1], pos[2]);
+          ->SigGenInit(pos[0], pos[1], pos[2]);
       
       Float_t localPos[3];
       Float_t globalPos[3] = {pos[0], pos[1], pos[2]};
@@ -1930,7 +781,7 @@ void AliMUONv1::StepManagerOld()
       eloss    += destep;
 
       // if (eloss > 0 && idvol < AliMUONConstants::NTrackingCh())
-      //       MakePadHits(0.5*(xhit+pos[0]),0.5*(yhit+pos[1]),pos[2],eloss,tof,idvol);
+      //        MakePadHits(0.5*(xhit+pos[0]),0.5*(yhit+pos[1]),pos[2],eloss,tof,idvol);
       xhit     = pos[0];
       yhit     = pos[1]; 
       zhit     = pos[2];
@@ -1943,5 +794,3 @@ void AliMUONv1::StepManagerOld()
       tlength += step ;
   }
 }
-
-
index 2e2c7649000bab1bcc8cfa4b36dbcdd81e2bbb8d..21d0e3d0f4a0509972fe3db2defb87a57420faf5 100644 (file)
@@ -4,10 +4,9 @@
  * See cxx source for full Copyright notice                               */
 
 /* $Id$ */
-/* $Id$ */
 
 /////////////////////////////////////////////////////////
-//  Manager and hits classes for set:MUON version 0    //
+//  Manager and hits classes for set:MUON version 1    //
 /////////////////////////////////////////////////////////
  
 #include "TLorentzVector.h"
 #include "AliMUON.h"
 
 class TF1;
+class TGeoCombiTrans;
+
+class TString;
+class TGeoHMatrix;
 
 class AliMUONv1 : public AliMUON {
 public:
    AliMUONv1();
    AliMUONv1(const char *name, const char *title);
-   virtual  ~AliMUONv1() {}
+   virtual  ~AliMUONv1();
    virtual void   CreateGeometry();
    virtual void   CreateMaterials();
    virtual void   Init();
@@ -34,7 +37,6 @@ public:
    void SetStepMaxInActiveGas(Float_t StepMax)
      {fStepMaxInActiveGas = StepMax; }
 protected:
-   Int_t*  fStations;              //! allow to externally set which station to create
    Bool_t  fStepManagerVersionOld; // Version of StepManager, Default is false
    Bool_t  fAngleEffect; // Angle Effect along wires, Default is true
    Float_t fStepMaxInActiveGas;    // Step max in active gas default 0.6cm
@@ -49,7 +51,13 @@ protected:
    TF1 *          fElossRatio;    // Ratio of particle mean eloss with respect MIP's 
    TF1 *          fAngleEffect10; // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers)  
    TF1 *          fAngleEffectNorma;// Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis)
+   TGeoCombiTrans* fGlobalTransformation; // global transformation 
+                                  // applied to the whole geometry 
 private:
+   // method
+   void PlaceVolume(const TString& name, const TString& mName, Int_t copyNo, 
+             const TGeoHMatrix& matrix, Int_t npar, Double_t* param) const;
+
    ClassDef(AliMUONv1,1)  // MUON Detector class Version 1