[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                               */

/* $Id$ */

#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.) {fbMax = 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.);
    void DrawPathLength(Double_t b, Int_t ni = 1000);
    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 fWStarfi;}
    TF1* Overlap() {return fWStaa;}
    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*    fWSb;            // Wood-Saxon Function (b)
    static TF2*    fWSbz;           // Wood-Saxon Function (b, z)
    static TF1*    fWSz;            // Wood-Saxon Function (b = b0, z)
    static TF1*    fWSta;           // Thickness Function
    static TF2*    fWStarfi;        // Kernel for Overlap Function
    static TF1*    fWStaa;          // Overlap Function
    static TF2*    fWAlmond;        // Interaction Almond
    static TF1*    fWPathLength0;   // Path Length as a function of phi
    static TF1*    fWPathLength;    // Path Length as a function of phi
    static TF1*    fWIntRadius;     // Interaction Radius
    static TF1*    fWSgeo;          // dSigma/db geometric
    static TF1*    fWSbinary;       // dSigma/db binary
    static TF1*    fWSN;            // dN/db binary
    static TF1*    fWEnergyDensity; // 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 fbMax;    // 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	/* $Id$ */
	7
	8	#include <TObject.h>
	9	class TF1;
	10	class TF2;
	11
	12	class AliFastGlauber : public TObject {
	13	public:
	14	AliFastGlauber();
	15	virtual ~AliFastGlauber(){;}
	16	void SetWoodSaxonParameters(Double_t r0, Double_t d, Double_t w, Double_t n)
	17	{fWSr0 = r0; fWSd = d; fWSw = w; fWSn = n;}
	18	void SetMaxImpact(Float_t bmax = 20.) {fbMax = bmax;};
	19	void SetHardCrossSection(Float_t xs = 6.6) {fSigmaHard = xs;}
	20
2a103154	21	static Double_t WSb (Double_t xx, Double_t par);
	22	static Double_t WSbz (Double_t xx, Double_t par);
	23	static Double_t WSz (Double_t xx, Double_t par);
	24	static Double_t WSta (Double_t xx, Double_t par);
	25	static Double_t WStarfi (Double_t xx, Double_t par);
	26	static Double_t WStaa (Double_t xx, Double_t par);
	27	static Double_t WSgeo (Double_t xx, Double_t par);
	28	static Double_t WSbinary (Double_t xx, Double_t par);
	29	static Double_t WSN (Double_t xx, Double_t par);
	30	static Double_t WAlmond (Double_t xx, Double_t par);
	31	static Double_t WPathLength0 (Double_t xx, Double_t par);
	32	static Double_t WPathLength (Double_t xx, Double_t par);
	33	static Double_t WIntRadius (Double_t xx, Double_t par);
	34	static Double_t WEnergyDensity (Double_t xx, Double_t par);
f3a04204	35
5b3a5a5d	36	void Init(Int_t mode = 0);
	37	void DrawWSb();
	38	void DrawThickness();
	39	void DrawOverlap();
	40	void DrawGeo();
	41	void DrawBinary();
	42	void DrawN();
2a103154	43	void DrawKernel(Double_t b = 0.);
	44	void DrawAlmond(Double_t b = 0.);
	45	void DrawPathLength0(Double_t b = 0.);
f3a04204	46	void DrawPathLength(Double_t b, Int_t ni = 1000);
2a103154	47	void DrawIntRadius(Double_t b = 0.);
2a103154	48	void DrawEnergyDensity();
f3a04204	49
5b3a5a5d	50	Double_t CrossSection(Double_t b1, Double_t b2);
	51	Double_t FractionOfHardCrossSection(Double_t b1, Double_t b2);
	52	Double_t Binaries(Double_t b);
	53	TF2* Kernel() {return fWStarfi;}
	54	TF1* Overlap() {return fWStaa;}
	55	void SimulateTrigger(Int_t n);
	56	void GetRandom(Float_t& b, Float_t& p, Float_t& mult);
c2140715	57	void GetRandom(Int_t& bin, Bool_t& hard);
5b3a5a5d	58	Float_t GetRandomImpactParameter(Float_t bmin, Float_t bmax);
5b3a5a5d	59	protected:
2a103154	60	static TF1* fWSb; // Wood-Saxon Function (b)
	61	static TF2* fWSbz; // Wood-Saxon Function (b, z)
	62	static TF1* fWSz; // Wood-Saxon Function (b = b0, z)
	63	static TF1* fWSta; // Thickness Function
	64	static TF2* fWStarfi; // Kernel for Overlap Function
	65	static TF1* fWStaa; // Overlap Function
	66	static TF2* fWAlmond; // Interaction Almond
	67	static TF1* fWPathLength0; // Path Length as a function of phi
	68	static TF1* fWPathLength; // Path Length as a function of phi
	69	static TF1* fWIntRadius; // Interaction Radius
	70	static TF1* fWSgeo; // dSigma/db geometric
	71	static TF1* fWSbinary; // dSigma/db binary
	72	static TF1* fWSN; // dN/db binary
	73	static TF1* fWEnergyDensity; // Energy density as a function of impact parameter
5b3a5a5d	74
2a103154	75	Float_t fWSr0; // Wood-Saxon Parameter r0
	76	Float_t fWSd; // Wood-Saxon Parameter d
	77	Float_t fWSw; // Wood-Saxon Parameter w
	78	Float_t fWSn; // Wood-Saxon Parameter n
	79	Float_t fSigmaHard; // Hard Cross Section
5b3a5a5d	80	static Float_t fbMax; // Maximum Impact Parameter
	81
	82	ClassDef(AliFastGlauber,1) // Event geometry simulation in the Glauber Model
	83	};
	84
	85	#endif
	86
	87
	88