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0ca57c2f | 1 | //-------------------------------------------------------------------------- |
2 | // Units.cc | |
3 | // Author: A. Buckley, D. Grellscheid | |
4 | // | |
5 | // units used by a GenEvent | |
6 | // The default units are set here at compile time. | |
7 | //-------------------------------------------------------------------------- | |
8 | ||
9 | #include "HepMC/Units.h" | |
10 | ||
11 | namespace HepMC { | |
12 | ||
13 | namespace Units { | |
14 | ||
15 | // helper functions | |
16 | std::string name(MomentumUnit m) { | |
17 | switch (m) { | |
18 | case MEV : return "MEV"; | |
19 | case GEV : return "GEV"; | |
20 | default : return "badValue"; | |
21 | } | |
22 | } | |
23 | ||
24 | std::string name(LengthUnit l) { | |
25 | switch (l) { | |
26 | case MM : return "MM"; | |
27 | case CM : return "CM"; | |
28 | default : return "badValue"; | |
29 | } | |
30 | } | |
31 | ||
32 | double conversion_factor(MomentumUnit from, MomentumUnit to) | |
33 | { | |
34 | if ( from == to ) | |
35 | return 1.0; | |
36 | else if ( from == MEV && to == GEV ) | |
37 | return 0.001; | |
38 | else | |
39 | return 1000.0; | |
40 | } | |
41 | ||
42 | double conversion_factor(LengthUnit from, LengthUnit to) | |
43 | { | |
44 | if ( from == to ) | |
45 | return 1.0; | |
46 | else if ( from == MM && to == CM ) | |
47 | return 0.1; | |
48 | else | |
49 | return 10.0; | |
50 | } | |
51 | ||
52 | // if this function fails to compile, rerun configure using --with-length_units | |
53 | LengthUnit default_length_unit() { | |
54 | //return @HEPMC_DEFAULT_LEN_UNIT@ ; | |
55 | return MM ; | |
56 | } | |
57 | ||
58 | // if this function fails to compile, rerun configure using --with-momentum_units | |
59 | MomentumUnit default_momentum_unit() { | |
60 | //return @HEPMC_DEFAULT_MOM_UNIT@ ; | |
61 | return MEV ; | |
62 | } | |
63 | ||
64 | } // Units | |
65 | ||
66 | } // HepMC |