BOSS_7.0.2: /home/bes3soft/bes3soft/Boss/7.0.2/dist/7.0.2/Reconstruction/MdcPatRec/MdcRecoUtil/MdcRecoUtil-00-01-08/MdcRecoUtil/DifExternal.h Source File

00001 //--------------------------------------------------------------------------
00002 // File and Version Information:
00003 //      $Id: DifExternal.h,v 1.2 2009/12/23 02:59:56 zhangy Exp $
00004 //
00005 // Description:
00006 //      Class Header for |DifExternal|
00007 //      Define some useful constants
00008 //
00009 // Environment:
00010 //      Software developed for the BaBar Detector at the SLAC B-Factory.
00011 //
00012 // Author List:
00013 //      A. Snyder
00014 //
00015 // Copyright Information:
00016 //      Copyright (C) 1996      SLAC
00017 // 
00018 // History:
00019 //      Migration for BESIII MDC
00020 //
00021 //------------------------------------------------------------------------
00022 
00023 #ifndef DifExternal_H
00024 #define DifExternal_H
00025 
00026 #include "MdcRecoUtil/DifNumber.h"
00027 #include "MdcRecoUtil/DifVector.h"
00028 #include "MdcRecoUtil/DifPoint.h"
00029 #include "MdcRecoUtil/DifComplex.h"
00030 
00031 extern const DifNumber one;
00032 extern const DifNumber zero;
00033 
00034 extern const DifVector xhat;
00035 extern const DifVector yhat;
00036 extern const DifVector zhat;
00037 extern const DifVector nullVec;
00038 
00039 extern const DifPoint origin;
00040 
00041 extern const DifComplex I;
00042 
00043 #endif
00044 
00045 
00046 
00047 
00048 
00049 
00050 
00051