[u/mrichter/AliRoot.git] / PWGCF / FEMTOSCOPY / AliFemtoUser / AliFemtoYlm.h

////////////////////////////////////////////////////////////////////////////////
//                                                                            //
// AliFemtoYlm - the class to calculate varous components of spherical        //
//  harmonics                                                                 //
//                                                                            //
// Authors: Adam Kisiel kisiel@mps.ohio-state.edu                             //
//                                                                            //
////////////////////////////////////////////////////////////////////////////////

#ifndef ALIFEMTOYLM_H
#define ALIFEMTOYLM_H
#include <cstdlib>
#include <cmath>
#include <complex>
#include <TMath.h>

class AliFemtoYlm {
 public:
  AliFemtoYlm();
  ~AliFemtoYlm();

  AliFemtoYlm(const AliFemtoYlm& aYlm);
  AliFemtoYlm& operator=(const AliFemtoYlm& aYlm);

  static double Legendre(int ell, int emm, double ctheta);
  static void   LegendreUpToYlm(int lmax, double ctheta, double *lbuf);

  static std::complex<double> Ylm(int ell,int m,double theta,double phi);
  static std::complex<double> Ylm(int ell, int m, double x, double y, double z);

  static void YlmUpToL(int lmax, double x, double y, double z, std::complex<double> *ylms);
  static void YlmUpToL(int lmax, double ctheta, double phi, std::complex<double> *ylms);

  static double ReYlm(int ell, int m, double theta, double phi);
  static double ReYlm(int ell, int m, double x, double y, double z);
  static double ImYlm(int ell, int m, double theta, double phi);
  static double ImYlm(int ell, int m, double x, double y, double z);

  static void InitializeYlms();
  
 private:
  static std::complex<double> Ceiphi(double phi);

  static double *fgPrefactors;
  static int    *fgPrefshift;
  static int    *fgPlmshift;
};

#endif
Commit	Line	Data
76ce4b5b	1	////////////////////////////////////////////////////////////////////////////////
	2	// //
	3	// AliFemtoYlm - the class to calculate varous components of spherical //
	4	// harmonics //
	5	// //
	6	// Authors: Adam Kisiel kisiel@mps.ohio-state.edu //
	7	// //
	8	////////////////////////////////////////////////////////////////////////////////
	9
	10	#ifndef ALIFEMTOYLM_H
	11	#define ALIFEMTOYLM_H
	12	#include <cstdlib>
	13	#include <cmath>
	14	#include <complex>
	15	#include <TMath.h>
	16
	17	class AliFemtoYlm {
	18	public:
	19	AliFemtoYlm();
	20	~AliFemtoYlm();
	21
	22	AliFemtoYlm(const AliFemtoYlm& aYlm);
	23	AliFemtoYlm& operator=(const AliFemtoYlm& aYlm);
	24
	25	static double Legendre(int ell, int emm, double ctheta);
	26	static void LegendreUpToYlm(int lmax, double ctheta, double *lbuf);
	27
	28	static std::complex<double> Ylm(int ell,int m,double theta,double phi);
	29	static std::complex<double> Ylm(int ell, int m, double x, double y, double z);
	30
	31	static void YlmUpToL(int lmax, double x, double y, double z, std::complex<double> *ylms);
	32	static void YlmUpToL(int lmax, double ctheta, double phi, std::complex<double> *ylms);
	33
	34	static double ReYlm(int ell, int m, double theta, double phi);
	35	static double ReYlm(int ell, int m, double x, double y, double z);
	36	static double ImYlm(int ell, int m, double theta, double phi);
	37	static double ImYlm(int ell, int m, double x, double y, double z);
	38
	39	static void InitializeYlms();
	40
	41	private:
	42	static std::complex<double> Ceiphi(double phi);
	43
	44	static double *fgPrefactors;
	45	static int *fgPrefshift;
	46	static int *fgPlmshift;
	47	};
	48
	49	#endif