| 1 | <!-- ******************************************************** --> |
|---|
| 2 | <!-- --> |
|---|
| 3 | <!-- [History] --> |
|---|
| 4 | <!-- Converted to DocBook: Katsuya Amako, Aug-2006 --> |
|---|
| 5 | <!-- --> |
|---|
| 6 | <!-- ******************************************************** --> |
|---|
| 7 | |
|---|
| 8 | <!-- ******************* Section (Level#1) ****************** --> |
|---|
| 9 | <sect1 id="sect.Clhep"> |
|---|
| 10 | <title> |
|---|
| 11 | CLHEP Foundation Library |
|---|
| 12 | </title> |
|---|
| 13 | |
|---|
| 14 | <para> |
|---|
| 15 | <ulink url="http://cern.ch/clhep/"> |
|---|
| 16 | CLHEP |
|---|
| 17 | </ulink> |
|---|
| 18 | is a set of Class Libraries containing many |
|---|
| 19 | basic classes for use in High Energy Physics. |
|---|
| 20 | </para> |
|---|
| 21 | |
|---|
| 22 | <para> |
|---|
| 23 | Both a CLHEP |
|---|
| 24 | <ulink url="http://cern.ch/clhep/manual/RefGuide/"> |
|---|
| 25 | Reference Guide |
|---|
| 26 | </ulink> |
|---|
| 27 | and a |
|---|
| 28 | <ulink url="http://cern.ch/clhep/manual/UserGuide/"> |
|---|
| 29 | User Guide |
|---|
| 30 | </ulink> |
|---|
| 31 | are available. |
|---|
| 32 | </para> |
|---|
| 33 | |
|---|
| 34 | <!-- ******* Bridgehead ******* --> |
|---|
| 35 | <bridgehead renderas='sect4'> |
|---|
| 36 | Origin and current situation of CLHEP |
|---|
| 37 | </bridgehead> |
|---|
| 38 | |
|---|
| 39 | <para> |
|---|
| 40 | CLHEP started in 1992 as a library for fundamental classes |
|---|
| 41 | mostly needed for, and in fact derived from, the MC event generator |
|---|
| 42 | MC++ written in C++. Since then various authors added classes to |
|---|
| 43 | this package, including several contributions made by developers in |
|---|
| 44 | the Geant4 Collaboration. |
|---|
| 45 | </para> |
|---|
| 46 | |
|---|
| 47 | <!-- ******* Bridgehead ******* --> |
|---|
| 48 | <bridgehead renderas='sect4'> |
|---|
| 49 | Geant4 and CLHEP |
|---|
| 50 | </bridgehead> |
|---|
| 51 | |
|---|
| 52 | <para> |
|---|
| 53 | The Geant4 project contributed to the development of CLHEP. The |
|---|
| 54 | random number package, physics units and constants, and some of the |
|---|
| 55 | numeric and geometry classes had their origins in Geant4. |
|---|
| 56 | </para> |
|---|
| 57 | |
|---|
| 58 | <para> |
|---|
| 59 | Geant4 also benefits from the development of CLHEP. In addition |
|---|
| 60 | to the already mentioned classes for random numbers and numerics, |
|---|
| 61 | we use the classes for points, vectors, and planes and their |
|---|
| 62 | transformations in 3D space, and lorentz vectors and their |
|---|
| 63 | transformations. Although these classes have Geant4 names like |
|---|
| 64 | G4ThreeVector, these are just typedefs to the CLHEP classes. |
|---|
| 65 | </para> |
|---|
| 66 | |
|---|
| 67 | |
|---|
| 68 | </sect1> |
|---|
