[u/mrichter/AliRoot.git] / FASTSIM / AliFastGlauber.h

#ifndef ALIFASTGLAUBER_H
#define ALIFASTGLAUBER_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$ */
//
// Utility class to make simple Glauber type calculations for collision geometries:
// Impact parameter, production points, reaction plane dependence
//
// Author: andreas.morsch@cern.ch

#include <TObject.h>
class TF1;
class TF2;

class AliFastGlauber : public TObject {
 public:
    AliFastGlauber();
    virtual ~AliFastGlauber(){;}
    void SetWoodSaxonParameters(Double_t r0, Double_t d, Double_t w, Double_t n)
	{fWSr0 = r0; fWSd = d; fWSw = w; fWSn = n;}
    void SetMaxImpact(Float_t bmax = 20.) {fgBMax = bmax;};
    void SetHardCrossSection(Float_t xs = 6.6) {fSigmaHard = xs;}
    
    static Double_t WSb            (Double_t *xx, Double_t *par);
    static Double_t WSbz           (Double_t *xx, Double_t *par);
    static Double_t WSz            (Double_t *xx, Double_t *par);
    static Double_t WSta           (Double_t *xx, Double_t *par);
    static Double_t WStarfi        (Double_t *xx, Double_t *par);
    static Double_t WStaa          (Double_t *xx, Double_t *par);
    static Double_t WSgeo          (Double_t *xx, Double_t *par);
    static Double_t WSbinary       (Double_t *xx, Double_t *par);
    static Double_t WSN            (Double_t *xx, Double_t *par);
    static Double_t WAlmond        (Double_t *xx, Double_t *par);
    static Double_t WPathLength0   (Double_t *xx, Double_t *par);
    static Double_t WPathLength    (Double_t *xx, Double_t *par);
    static Double_t WIntRadius     (Double_t *xx, Double_t *par);
    static Double_t WEnergyDensity (Double_t *xx, Double_t *par);
    
    void Init(Int_t mode = 0);
    void DrawWSb();
    void DrawThickness();
    void DrawOverlap();
    void DrawGeo();
    void DrawBinary();
    void DrawN();    
    void DrawKernel(Double_t b = 0.);
    void DrawAlmond(Double_t b = 0.);
    void DrawPathLength0(Double_t b = 0., Int_t iopt = 0);
    void DrawPathLength(Double_t b, Int_t ni = 1000, Int_t iopt = 0);
    void DrawIntRadius(Double_t b = 0.);
    void DrawEnergyDensity();
    
    Double_t CrossSection(Double_t b1, Double_t b2);
    Double_t FractionOfHardCrossSection(Double_t b1, Double_t b2);
    Double_t Binaries(Double_t b);
    TF2* Kernel()  {return fgWStarfi;}
    TF1* Overlap() {return fgWStaa;}
    void SimulateTrigger(Int_t n);
    void GetRandom(Float_t& b, Float_t& p, Float_t& mult);
    void GetRandom(Int_t& bin, Bool_t& hard);
    Float_t GetRandomImpactParameter(Float_t bmin, Float_t bmax);
 protected:
    static TF1*    fgWSb;            // Wood-Saxon Function (b)
    static TF2*    fgWSbz;           // Wood-Saxon Function (b, z)
    static TF1*    fgWSz;            // Wood-Saxon Function (b = b0, z)
    static TF1*    fgWSta;           // Thickness Function
    static TF2*    fgWStarfi;        // Kernel for Overlap Function
    static TF1*    fgWStaa;          // Overlap Function
    static TF2*    fgWAlmond;        // Interaction Almond
    static TF1*    fgWPathLength0;   // Path Length as a function of phi
    static TF1*    fgWPathLength;    // Path Length as a function of phi
    static TF1*    fgWIntRadius;     // Interaction Radius
    static TF1*    fgWSgeo;          // dSigma/db geometric
    static TF1*    fgWSbinary;       // dSigma/db binary
    static TF1*    fgWSN;            // dN/db binary
    static TF1*    fgWEnergyDensity; // Energy density as a function of impact parameter
    
    Float_t fWSr0;           // Wood-Saxon Parameter r0
    Float_t fWSd;            // Wood-Saxon Parameter d
    Float_t fWSw;            // Wood-Saxon Parameter w
    Float_t fWSn;            // Wood-Saxon Parameter n
    Float_t fSigmaHard;      // Hard Cross Section
    static Float_t fgBMax;   // Maximum Impact Parameter
    
    ClassDef(AliFastGlauber,1) // Event geometry simulation in the Glauber Model
};

#endif
Commit	Line	Data
5b3a5a5d	1	#ifndef ALIFASTGLAUBER_H
	2	#define ALIFASTGLAUBER_H
	3	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
	6	/* $Id$ */
041f7f97	7	//
	8	// Utility class to make simple Glauber type calculations for collision geometries:
	9	// Impact parameter, production points, reaction plane dependence
	10	//
	11	// Author: andreas.morsch@cern.ch
5b3a5a5d	12
	13	#include <TObject.h>
	14	class TF1;
	15	class TF2;
	16
	17	class AliFastGlauber : public TObject {
	18	public:
	19	AliFastGlauber();
	20	virtual ~AliFastGlauber(){;}
	21	void SetWoodSaxonParameters(Double_t r0, Double_t d, Double_t w, Double_t n)
	22	{fWSr0 = r0; fWSd = d; fWSw = w; fWSn = n;}
041f7f97	23	void SetMaxImpact(Float_t bmax = 20.) {fgBMax = bmax;};
5b3a5a5d	24	void SetHardCrossSection(Float_t xs = 6.6) {fSigmaHard = xs;}
5b3a5a5d	25
2a103154	26	static Double_t WSb (Double_t xx, Double_t par);
	27	static Double_t WSbz (Double_t xx, Double_t par);
	28	static Double_t WSz (Double_t xx, Double_t par);
	29	static Double_t WSta (Double_t xx, Double_t par);
	30	static Double_t WStarfi (Double_t xx, Double_t par);
	31	static Double_t WStaa (Double_t xx, Double_t par);
	32	static Double_t WSgeo (Double_t xx, Double_t par);
	33	static Double_t WSbinary (Double_t xx, Double_t par);
	34	static Double_t WSN (Double_t xx, Double_t par);
	35	static Double_t WAlmond (Double_t xx, Double_t par);
	36	static Double_t WPathLength0 (Double_t xx, Double_t par);
	37	static Double_t WPathLength (Double_t xx, Double_t par);
	38	static Double_t WIntRadius (Double_t xx, Double_t par);
	39	static Double_t WEnergyDensity (Double_t xx, Double_t par);
f3a04204	40
5b3a5a5d	41	void Init(Int_t mode = 0);
	42	void DrawWSb();
	43	void DrawThickness();
	44	void DrawOverlap();
	45	void DrawGeo();
	46	void DrawBinary();
	47	void DrawN();
2a103154	48	void DrawKernel(Double_t b = 0.);
2a103154	49	void DrawAlmond(Double_t b = 0.);
8de7e046	50	void DrawPathLength0(Double_t b = 0., Int_t iopt = 0);
8de7e046	51	void DrawPathLength(Double_t b, Int_t ni = 1000, Int_t iopt = 0);
2a103154	52	void DrawIntRadius(Double_t b = 0.);
2a103154	53	void DrawEnergyDensity();
f3a04204	54
5b3a5a5d	55	Double_t CrossSection(Double_t b1, Double_t b2);
	56	Double_t FractionOfHardCrossSection(Double_t b1, Double_t b2);
	57	Double_t Binaries(Double_t b);
041f7f97	58	TF2* Kernel() {return fgWStarfi;}
041f7f97	59	TF1* Overlap() {return fgWStaa;}
5b3a5a5d	60	void SimulateTrigger(Int_t n);
5b3a5a5d	61	void GetRandom(Float_t& b, Float_t& p, Float_t& mult);
c2140715	62	void GetRandom(Int_t& bin, Bool_t& hard);
5b3a5a5d	63	Float_t GetRandomImpactParameter(Float_t bmin, Float_t bmax);
5b3a5a5d	64	protected:
041f7f97	65	static TF1* fgWSb; // Wood-Saxon Function (b)
	66	static TF2* fgWSbz; // Wood-Saxon Function (b, z)
	67	static TF1* fgWSz; // Wood-Saxon Function (b = b0, z)
	68	static TF1* fgWSta; // Thickness Function
	69	static TF2* fgWStarfi; // Kernel for Overlap Function
	70	static TF1* fgWStaa; // Overlap Function
	71	static TF2* fgWAlmond; // Interaction Almond
	72	static TF1* fgWPathLength0; // Path Length as a function of phi
	73	static TF1* fgWPathLength; // Path Length as a function of phi
	74	static TF1* fgWIntRadius; // Interaction Radius
	75	static TF1* fgWSgeo; // dSigma/db geometric
	76	static TF1* fgWSbinary; // dSigma/db binary
	77	static TF1* fgWSN; // dN/db binary
	78	static TF1* fgWEnergyDensity; // Energy density as a function of impact parameter
5b3a5a5d	79
2a103154	80	Float_t fWSr0; // Wood-Saxon Parameter r0
	81	Float_t fWSd; // Wood-Saxon Parameter d
	82	Float_t fWSw; // Wood-Saxon Parameter w
	83	Float_t fWSn; // Wood-Saxon Parameter n
	84	Float_t fSigmaHard; // Hard Cross Section
041f7f97	85	static Float_t fgBMax; // Maximum Impact Parameter
5b3a5a5d	86
	87	ClassDef(AliFastGlauber,1) // Event geometry simulation in the Glauber Model
	88	};
	89
	90	#endif
	91
	92
	93