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DifExternal.h
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1//--------------------------------------------------------------------------
2// File and Version Information:
3// $Id: DifExternal.h,v 1.2 2009/12/23 02:59:56 zhangy Exp $
4//
5// Description:
6// Class Header for |DifExternal|
7// Define some useful constants
8//
9// Environment:
10// Software developed for the BaBar Detector at the SLAC B-Factory.
11//
12// Author List:
13// A. Snyder
14//
15// Copyright Information:
16// Copyright (C) 1996 SLAC
17//
18// History:
19// Migration for BESIII MDC
20//
21//------------------------------------------------------------------------
22
23#ifndef DifExternal_H
24#define DifExternal_H
25
26#include "MdcRecoUtil/DifNumber.h"
27#include "MdcRecoUtil/DifVector.h"
28#include "MdcRecoUtil/DifPoint.h"
29#include "MdcRecoUtil/DifComplex.h"
30
31extern const DifNumber one;
32extern const DifNumber zero;
33
34extern const DifVector xhat;
35extern const DifVector yhat;
36extern const DifVector zhat;
37extern const DifVector nullVec;
38
39extern const DifPoint origin;
40
41extern const DifComplex I;
42
43#endif
44
45
46
47
48
49
50
51
yhat
const DifVector yhat
nullVec
const DifVector nullVec
I
const DifComplex I
xhat
const DifVector xhat
origin
const DifPoint origin
zero
const DifNumber zero
zhat
const DifVector zhat