Communication between generators provising and requesting collision

geometries.

diff --git a/EVGEN/AliGenCocktail.cxx b/EVGEN/AliGenCocktail.cxx
index 4df3228782d4fc2583dc2a172a7ab6aad70034b6..a711aa065fbf49dac04305fa9434722942e0a662 100644 (file)
--- a/EVGEN/AliGenCocktail.cxx
+++ b/EVGEN/AliGenCocktail.cxx
@@ -15,6 +15,9 @@
 
 /*
 $Log$
+Revision 1.14  2002/02/08 16:50:50  morsch
+Add name and title in constructor.
+
 Revision 1.13  2001/10/21 18:35:56  hristov
 Several pointers were set to zero in the default constructors to avoid memory management problems
 
@@ -134,13 +137,17 @@ AddGenerator(AliGenerator *Generator, char* Name, Float_t RateExp)
 //
 // Generate event 
     TIter next(fEntries);
-    AliGenCocktailEntry *entry;
-    AliGenCocktailEntry *e1;
-    AliGenCocktailEntry *e2;
+    AliGenCocktailEntry *entry = 0;
+    AliGenCocktailEntry *preventry = 0;
+    AliGenerator* gen = 0;
+    
+//    AliGenCocktailEntry *e1;
+//    AliGenCocktailEntry *e2;
     TObjArray *partArray = gAlice->Particles();
     //
     // Loop over generators and generate events
     Int_t igen=0;
+    
     while((entry = (AliGenCocktailEntry*)next())) {
        igen++;
        if (igen ==1) {
@@ -148,10 +155,26 @@ AddGenerator(AliGenerator *Generator, char* Name, Float_t RateExp)
        } else {
            entry->SetFirst((partArray->GetEntriesFast())+1);
        }
+//
+//      Handle case in which current generator needs collision geometry from previous generator
+//
+       gen = entry->Generator();
+       if (gen->NeedsCollisionGeometry())
+       {
+           if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
+           {
+               gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
+           } else {
+               Fatal("Generate()", "No Collision Geometry Provided");
+           }
+       }
+       
        entry->Generator()->Generate();
        entry->SetLast(partArray->GetEntriesFast());
+       preventry = entry;
     }  
     next.Reset();
+/*
     while((entry = (AliGenCocktailEntry*)next())) {
        entry->PrintInfo();
     }
@@ -169,6 +192,7 @@ AddGenerator(AliGenerator *Generator, char* Name, Float_t RateExp)
        e1->PrintInfo();
        e2->PrintInfo();
     }
+*/
 }
 
 AliGenCocktailEntry *  AliGenCocktail::FirstGenerator()