If run with debug option (from gAlice) geantinos are sent back and volume sequence...

Can be very verbous in some cases.

diff --git a/STEER/AliLego.cxx b/STEER/AliLego.cxx
index 100341940bb87c44ce11423512e2318c0930255e..2ad65e12ee603c0b75b749298bc06b5147f4c4dc 100644 (file)
--- a/STEER/AliLego.cxx
+++ b/STEER/AliLego.cxx
@@ -15,6 +15,9 @@
 
 /*
 $Log$
+Revision 1.21  2000/12/15 10:33:59  morsch
+Invert coordinates to make meaningful zylindrical plots.
+
 Revision 1.20  2000/11/30 07:12:48  alibrary
 Introducing new Rndm and QA classes
 
@@ -94,10 +97,15 @@ Introduction of the Copyright and cvs Log
 #include "TMath.h"
 
 #include "AliLego.h"
+#include "AliDebugVolume.h"
+#include "AliRun.h"
 #include "AliLegoGenerator.h"
 #include "AliConst.h"
 #include "AliMC.h"
 #include "TH2.h"
+#include "TString.h"
+#include "TClonesArray.h"
+
 
 ClassImp(AliLego)
 
@@ -134,6 +142,14 @@ AliLego::AliLego(const char *title, Int_t ntheta, Float_t thetamin,
                        ntheta,thetamin,thetamax,nphi,phimin,phimax);
    fHistGcm2 = new TH2F("hgcm2","g/cm2 length map",        
                        ntheta,thetamin,thetamax,nphi,phimin,phimax);
+//
+   fStepBack      = 0;
+   fStepsBackward = 0;
+   fStepsForward  = 0;
+   fStepBack      = 0;
+   fVolumesFwd     = new TClonesArray("AliDebugVolume",1000);
+   fVolumesBwd     = new TClonesArray("AliDebugVolume",1000);
+   fDebug = gAlice->GetDebug();
 }
 
 AliLego::AliLego(const char *title, AliLegoGenerator* generator)
@@ -156,6 +172,15 @@ AliLego::AliLego(const char *title, AliLegoGenerator* generator)
                        n2, c2min, c2max, n1, c1min, c1max);
    fHistGcm2 = new TH2F("hgcm2","g/cm2 length map",        
                        n2, c2min, c2max, n1, c1min, c1max);
+//
+//
+   fStepBack       = 0;
+   fStepsBackward  = 0;
+   fStepsForward   = 0;
+   fStepBack       = 0;
+   fVolumesFwd     = new TClonesArray("AliDebugVolume",1000);
+   fVolumesBwd     = new TClonesArray("AliDebugVolume",1000);
+   fDebug = gAlice->GetDebug();
 }
 
 //___________________________________________
@@ -168,6 +193,8 @@ AliLego::~AliLego()
   delete fHistAbso;
   delete fHistGcm2;
   delete fGener;
+  if (fVolumesFwd) delete fVolumesFwd;
+  if (fVolumesBwd) delete fVolumesBwd;
 }
 
 //___________________________________________
@@ -179,6 +206,7 @@ void AliLego::BeginEvent()
   fTotRadl = 0;
   fTotAbso = 0;
   fTotGcm2 = 0;
+  fErrorCondition = 0;
 }
 
 //___________________________________________
@@ -221,65 +249,179 @@ void AliLego::Copy(AliLego &lego) const
 }
 
 //___________________________________________
-void AliLego::StepManager()
-{
+void AliLego::StepManager() {
 // called from AliRun::Stepmanager from gustep.
 // Accumulate the 3 parameters step by step
-  
-   static Float_t t;
-   Float_t a,z,dens,radl,absl;
-   Int_t i;
-   
-   Float_t step  = gMC->TrackStep();
-       
-   Float_t vect[3], dir[3];
-   TLorentzVector pos, mom;
-
-   gMC->CurrentMaterial(a,z,dens,radl,absl);
-   
-   if (z < 1) return;
+    static Float_t t;
+    Float_t a,z,dens,radl,absl;
+    Int_t i, id, copy;
+    const char* vol;
+    static Float_t vect[3], dir[3];
     
+    TString tmp1, tmp2;
+    copy = 1;
+    id  = gMC->CurrentVolID(copy);
+    vol = gMC->VolName(id);
+    Float_t step  = gMC->TrackStep();
+//    strcpy(tmp,vol);
+
+   TLorentzVector pos, mom; 
    gMC->TrackPosition(pos);  
    gMC->TrackMomentum(mom);
-// --- See if we have to stop now
-   if (TMath::Abs(pos[2]) > fGener->ZMax()  || 
-       pos[0]*pos[0] +pos[1]*pos[1] > fGener->RadMax()*fGener->RadMax()) {
-     if (!gMC->IsNewTrack()) {
-       // Not the first step, add past contribution
-       fTotAbso += t/absl;
-       fTotRadl += t/radl;
-       fTotGcm2 += t*dens;
-//       Int_t copy;
-//       Int_t id = gMC->CurrentVolID(copy);
-//       char* vol = gMC->VolName(id);
-       
-//       printf("\n %f %f %f %f %s  ", fTotRadl, vect[0], vect[1], vect[2], vol);
+   
+   Int_t status = 0;
+   if (gMC->IsTrackEntering()) status = 1;
+   if (gMC->IsTrackExiting())  status = 2;       
 
-     }
-     gMC->StopTrack();
-     return;
-   }
+  if (! fStepBack) {
+//
+// Normal Forward stepping
+//
+      if (fDebug) {
+//
+// store volume if different from previous
+//
+         
+         if (fStepsForward > 0) {
+             AliDebugVolume* tmp = (AliDebugVolume*) (*fVolumesFwd)[fStepsForward-1];         
+//           if (!tmp->IsEqual(vol, copy))
+//           {
+                 TClonesArray &lvols = *fVolumesFwd;
+                 new(lvols[fStepsForward++]) 
+                     AliDebugVolume(vol,copy,step,pos[0], pos[1], pos[2], status);
+//           } 
+         } else {
+             TClonesArray &lvols = *fVolumesFwd;
+             new(lvols[fStepsForward++]) 
+                 AliDebugVolume(vol,copy,step,pos[0], pos[1], pos[2], status);
+         }
+      } // Debug
+//
+// Get current material properties
 
+      gMC->CurrentMaterial(a,z,dens,radl,absl);
+      
+      if (z < 1) return;
+      
+// --- See if we have to stop now
+       if (TMath::Abs(pos[2]) > fGener->ZMax()  || 
+          pos[0]*pos[0] +pos[1]*pos[1] > fGener->RadMax()*fGener->RadMax()) {
+          if (!gMC->IsNewTrack()) {
+              // Not the first step, add past contribution
+              fTotAbso += t/absl;
+              fTotRadl += t/radl;
+              fTotGcm2 += t*dens;
+
+              if (fDebug) {
+//
+//  generate "mirror" particle flying back
+//
+                  fStepsBackward = fStepsForward;
+              
+                  Float_t pmom[3], orig[3];
+                  Float_t polar[3] = {0.,0.,0.};
+                  Int_t ntr;
+                  pmom[0] = -dir[0];
+                  pmom[1] = -dir[1];      
+                  pmom[2] = -dir[2];
+                  orig[0] =  vect[0];
+                  orig[1] =  vect[1];     
+                  orig[2] =  vect[2];
+                  
+                  gAlice->SetTrack(1, gAlice->CurrentTrack(), 
+                                   0, pmom, orig, polar, 0., kPNoProcess, ntr);
+              } // debug
+              
+          } // not a new track !
+
+          fStepBack = 1;
+          gMC->StopTrack();
+          return;
+       } // outside scoring region ?
+       
 // --- See how long we have to go
-   for(i=0;i<3;++i) {
-     vect[i]=pos[i];
-     dir[i]=mom[i];
-   }
-
-   t  = fGener->PropagateCylinder(vect,dir,fGener->RadMax(),fGener->ZMax());
-
-   if(step) {
-     fTotAbso += step/absl;
-     fTotRadl += step/radl;
-     fTotGcm2 += step*dens;
-//     Int_t copy;
-//     Int_t id = gMC->CurrentVolID(copy);
-//     char* vol = gMC->VolName(id);
-//     printf("\n %f %f %f %f %s %f ", fTotRadl, vect[0], vect[1], vect[2], vol, t);
-   }
+       for(i=0;i<3;++i) {
+          vect[i]=pos[i];
+          dir[i]=mom[i];
+       }
+       
+       t  = fGener->PropagateCylinder(vect,dir,fGener->RadMax(),fGener->ZMax());
+       
+       if(step) {
+          fTotAbso += step/absl;
+          fTotRadl += step/radl;
+          fTotGcm2 += step*dens;
+       }
+       
+
+  } else {
+      if (fDebug) {
+//
+// Geometry debugging
+// Fly back and compare volume sequence
+//
+         if (fStepsBackward < fStepsForward) {
+             AliDebugVolume* tmp = (AliDebugVolume*) (*fVolumesBwd)[fStepsBackward];          
+             if (tmp->IsEqual(vol, copy)) {
+//               return;
+             }
+         } 
+           
+         fStepsBackward--;
+         
+         if (fStepsBackward < 0) {
+             gMC->StopTrack();
+             if (fErrorCondition) {
+                 //
+                 // Dump volume sequence in case of error
+                 //
+                 printf("\n Dumping Volume Sequence:");
+                 printf("\n ==============================================");
+                 
+                 for (i = fStepsForward-1; i>=0; i--)
+                 {
+                 AliDebugVolume* tmp1 = (AliDebugVolume*) (*fVolumesFwd)[i];
+                 AliDebugVolume* tmp2 = (AliDebugVolume*) (*fVolumesBwd)[i];                 
+                 
+                 printf("\n Volume Fwd: %3d: %5s (%3d) step: %12.5e (x,y,z) (%12.5e %12.5e %12.5e) status: %9s\n"
+                        , i, 
+                        tmp1->GetName(), tmp1->CopyNumber(), tmp1->Step(), tmp1->X(), tmp1->Y(), tmp1->Z(), tmp1->Status());
+                 
+                 printf("\n Volume Bwd: %3d: %5s (%3d) step: %12.5e (x,y,z) (%12.5e %12.5e %12.5e) status: %9s\n"
+                        , i, 
+                        tmp2->GetName(), tmp2->CopyNumber(), tmp2->Step(), tmp2->X(), tmp2->Y(), tmp2->Z(), tmp2->Status());
+                 
+                 printf("\n ............................................................................\n");
+                 }
+                 printf("\n ==============================================\n");
+             }
+             fVolumesFwd->Delete();
+             fVolumesBwd->Delete();
+             fStepBack        = 0;
+             fStepsForward    = 0;
+             fStepsBackward   = 0;               
+             fErrorCondition  = 0;
+             return;
+         }
+         
+         TClonesArray &lvols = *fVolumesBwd;
+         new(lvols[fStepsBackward]) AliDebugVolume(vol,copy,step,pos[0], pos[1], pos[2], status);
+         
+         AliDebugVolume* tmp = (AliDebugVolume*) (*fVolumesFwd)[fStepsBackward];
+         if (! (tmp->IsEqual(vol, copy)) && (!fErrorCondition)) 
+         {
+             printf("\n Problem at (x,y,z): %d %f %f %f, volumes: %s %s step: %f\n", 
+                    fStepsBackward, pos[0], pos[1], pos[2], tmp->GetName(), vol, step);
+             fErrorCondition = 1;
+         } 
+      } // Debug
+  } // bwd/fwd
 }
 
 
 
 
 
+
+
+

diff --git a/STEER/AliLego.h b/STEER/AliLego.h
index 46adc7a4b7eac957b44a2d6dcc5eba4bd129186a..9e0b918dc6a21dc77b227635c26eaa86918b8102 100644 (file)
--- a/STEER/AliLego.h
+++ b/STEER/AliLego.h
@@ -15,8 +15,8 @@
 
 #include "TNamed.h"
 class TH2F;
-
 class AliLegoGenerator;
+class TClonesArray;
 
 class AliLego : public TNamed  {
 
@@ -35,16 +35,22 @@ public:
   virtual void  FinishRun();
   virtual AliLego &operator=(const AliLego &lego) 
   {lego.Copy(*this);return(*this);}
-  
 private:
    AliLegoGenerator *fGener;     //Lego generator
-   Float_t    fTotRadl;          //Total Radiation length
-   Float_t    fTotAbso;          //Total absorption length
-   Float_t    fTotGcm2;          //Total G/CM2 traversed
+   Float_t    fTotRadl;          //!Total Radiation length
+   Float_t    fTotAbso;          //!Total absorption length
+   Float_t    fTotGcm2;          //!Total G/CM2 traversed
    TH2F      *fHistRadl;         //Radiation length map 
    TH2F      *fHistAbso;         //Interaction length map
    TH2F      *fHistGcm2;         //g/cm2 length map
    TH2F      *fHistReta;         //Radiation length map as a function of eta
+   TClonesArray *fVolumesFwd;    //!Volume sequence forward
+   TClonesArray *fVolumesBwd;    //!Volume sequence backward   
+   Int_t      fStepBack;         //!Flag for backstepping
+   Int_t      fStepsBackward;    //!Counts steps forward
+   Int_t      fStepsForward;     //!Counts steps backward
+   Int_t      fErrorCondition;   //!Error condition flag
+   Int_t      fDebug;            // Debug Flag
    
   ClassDef(AliLego,1) //Utility class to compute and draw Radiation Length Map
 
@@ -52,3 +58,14 @@ private:
 
 
 #endif
+
+
+
+
+
+
+
+
+
+
+