[u/mrichter/AliRoot.git] / TEvtGen / EvtGenBase / EvtDiLog.hh

// $Id: EvtDiLog.hh,v 1.1 2009/02/18 21:21:33 ryd Exp $
#ifndef EVTGENBASE_EVTDILOG_HH 
#define EVTGENBASE_EVTDILOG_HH 1

// Include files

/** @namespace EvtDiLog EvtDiLog.hh EvtGenBase/EvtDiLog.hh
 *  Dilogarithm function (replaces CERNLIB DDILOG)
 *
 *  @author Patrick Robbe
 *  @date   2007-01-23
 */
namespace EvtDiLog {
  double DiLog( double x ) ;

  // constants for computation
  static const double Z1 = 1. ;
  static const double HF = Z1 / 2. ;
  static const double PI = 3.14159265358979324 ;
  static const double PI3 = PI * PI / 3. ;
  static const double PI6 = PI * PI / 6. ;
  static const double PI12 = PI * PI / 12. ;
  static const double C[ 20 ]  = {
    0.42996693560813697 ,
    0.40975987533077105 , 
    -0.01858843665014592 ,
    0.00145751084062268 ,
    -0.00014304184442340 ,
    0.00001588415541880 ,
    -0.00000190784959387 ,
    0.00000024195180854 ,
    -0.00000003193341274 ,
    0.00000000434545063 ,
    -0.00000000060578480 ,
    0.00000000008612098 ,
    -0.00000000001244332 ,
    0.00000000000182256 ,
    -0.00000000000027007 ,
    0.00000000000004042 ,
    -0.00000000000000610 ,
    0.00000000000000093 ,
    -0.00000000000000014 ,
    0.00000000000000002 } ;
}
#endif // EVTGENBASE_EVTDILOG_HH
Commit	Line	Data
da0e9ce3	1	// $Id: EvtDiLog.hh,v 1.1 2009/02/18 21:21:33 ryd Exp $
	2	#ifndef EVTGENBASE_EVTDILOG_HH
	3	#define EVTGENBASE_EVTDILOG_HH 1
	4
	5	// Include files
	6
	7	/** @namespace EvtDiLog EvtDiLog.hh EvtGenBase/EvtDiLog.hh
	8	* Dilogarithm function (replaces CERNLIB DDILOG)
	9	*
	10	* @author Patrick Robbe
	11	* @date 2007-01-23
	12	*/
	13	namespace EvtDiLog {
	14	double DiLog( double x ) ;
	15
	16	// constants for computation
	17	static const double Z1 = 1. ;
	18	static const double HF = Z1 / 2. ;
	19	static const double PI = 3.14159265358979324 ;
	20	static const double PI3 = PI * PI / 3. ;
	21	static const double PI6 = PI * PI / 6. ;
	22	static const double PI12 = PI * PI / 12. ;
	23	static const double C[ 20 ] = {
	24	0.42996693560813697 ,
	25	0.40975987533077105 ,
	26	-0.01858843665014592 ,
	27	0.00145751084062268 ,
	28	-0.00014304184442340 ,
	29	0.00001588415541880 ,
	30	-0.00000190784959387 ,
	31	0.00000024195180854 ,
	32	-0.00000003193341274 ,
	33	0.00000000434545063 ,
	34	-0.00000000060578480 ,
	35	0.00000000008612098 ,
	36	-0.00000000001244332 ,
	37	0.00000000000182256 ,
	38	-0.00000000000027007 ,
	39	0.00000000000004042 ,
	40	-0.00000000000000610 ,
	41	0.00000000000000093 ,
	42	-0.00000000000000014 ,
	43	0.00000000000000002 } ;
	44	}
	45	#endif // EVTGENBASE_EVTDILOG_HH