New version of AliGeVSim code. New class for flow afterburner (S.Radomski)

[u/mrichter/AliRoot.git] / EVGEN / AliGenGeVSim.h

diff --git a/EVGEN/AliGenGeVSim.h b/EVGEN/AliGenGeVSim.h
index e81faee28e2daa0fe6fdba4df4d9a1a8745c6f6b..d7895f26275871096cae67be889f899cb1337e7f 100644 (file)
--- a/EVGEN/AliGenGeVSim.h
+++ b/EVGEN/AliGenGeVSim.h
@@ -1,49 +1,92 @@
 #ifndef ALIGENGEVSIM_H
 #define ALIGENGEVSIM_H
 
-#include "TObjArray.h"
-#include "TF1.h"
-#include "TF2.h"
-#include "AliGenerator.h"
-#include "AliGeVSimParticle.h"
+////////////////////////////////////////////////////////////////////////////////
+//
+// AliGenGeVSim is a class implementing simple Monte-Carlo event generator for 
+// testing algorythms and detector performance.
+//
+// In this event generator particles are generated from thermal distributions 
+// without any dynamics and addicional constrains. Distribution parameters like
+// multiplicity, particle type yields, inverse slope parameters, flow coeficients 
+// and expansion velocities are expleicite defined by the user.
+//
+// GeVSim contains four thermal distributions the same as
+// MevSim event generator developed for STAR experiment.
+//
+// In addition custom distributions can be used be the mean of TF2 function
+// named "gevsimPtY". 
+//  
+// Azimuthal distribution is deconvoluted from (Pt,Y) distribution
+// and is described by two Fourier coefficients representing 
+// Directed and Elliptical flow. 
+// 
+// To apply flow to event ganerated by an arbitraly event generator
+// refer to AliGenAfterBurnerFlow class.
+// For examples, parameters and testing macros refer to:
+// http:/home.cern.ch/radomski
+//  
+// Author:
+// Sylwester Radomski,
+// GSI, March 2002
+//  
+// S.Radomski@gsi.de
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TFormula;
+class TF1;
+class TF2;
+class TObjArray;
+class AliGeVSimParticle;
 
 
 class AliGenGeVSim : public AliGenerator {
 
+ public:
+  
+  AliGenGeVSim();
+  AliGenGeVSim(Int_t model, Float_t psi);
+  
+  virtual ~AliGenGeVSim();
+  
+  /////////////////////////////////////////////////////////////////
+  
+  void AddParticleType(AliGeVSimParticle *part);
+  
+  void Init();
+  void Generate();
+  
+  /////////////////////////////////////////////////////////////////
+  
+ private:
+  
   Int_t   fModel;            // Selected model (1-5)
   Float_t fPsi;              // Reaction Plane angle (0-2pi)
-
+  
   TF1 *fPtFormula;           // Pt formula for model (1)
   TF1 *fYFormula;            // Y formula for model (1)
   TF2 *fPtYFormula[4];       // Pt,Y formulae for model (2)-(4) and custom
   TF1 *fPhiFormula;          // phi formula 
-
+  
   TObjArray *fPartTypes;     // Registered particles
-
+  
   void InitFormula();        
+  void DetermineReactionPlane();
+ 
+  TFormula* DetermineModel();
+ 
   //void PlotDistributions();
   
   Bool_t CheckPtYPhi(Float_t pt, Float_t y, Float_t phi);
   Bool_t CheckP(Float_t p[3]);
-
+  
   Float_t FindScaler(Int_t paramId, Int_t pdg);
-
- public:
-
-  AliGenGeVSim();
-  AliGenGeVSim(Int_t model, Float_t psi);
-
-  virtual ~AliGenGeVSim();
-
-  /////////////////////////////////////////////////////////////////
-
-  void AddParticleType(AliGeVSimParticle *part);
   
-  void Init();
-  void Generate();
-
   /////////////////////////////////////////////////////////////////
 
+ public:
+
   ClassDef(AliGenGeVSim, 1)
 
 };