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| 5 | <BODY> |
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| 6 | <TABLE WIDTH="100%"><TR> |
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| 7 | <TD> |
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| 9 | |
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| 10 | <A HREF="index.html"> |
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| 11 | <IMG SRC="../../../../resources/html/IconsGIF/Contents.gif" ALT="Contents"></A> |
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| 12 | <A HREF="histogramming.html"> |
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| 16 | </TD> |
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| 17 | <TD ALIGN="Right"> |
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| 18 | <FONT SIZE="-1" COLOR="#238E23"> |
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| 19 | <B>Geant4 User's Guide</B> |
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| 20 | <BR> |
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| 21 | <B>For Application Developers</B> |
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| 22 | <BR> |
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| 23 | <B>Appendix</B> |
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| 24 | </FONT> |
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| 25 | </TD> |
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| 26 | </TR></TABLE> |
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| 27 | <BR><BR> |
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| 28 | |
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| 29 | <P ALIGN="Center"> |
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| 30 | <FONT SIZE="+3" COLOR="#238E23"> |
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| 31 | <A name="10.3"> |
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| 32 | <B>10.3 CLHEP Foundation Library</B></A> |
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| 33 | </FONT> |
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| 34 | <BR><BR> |
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| 35 | |
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| 36 | <HR ALIGN="Center" SIZE="7%"> |
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| 37 | <BR><BR> |
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| 38 | |
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| 39 | <p> |
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| 40 | <A HREF="http://cern.ch/clhep"> |
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| 41 | CLHEP</A> <A HREF="#CLHEP-home">[1]</a> is a set of Class Libraries |
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| 42 | containing many basic classes for use in High Energy Physics. |
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| 43 | </p> |
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| 44 | <p> |
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| 45 | Both a CLHEP |
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| 46 | <A HREF="http://cern.ch/clhep/manual/RefGuide"> |
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| 47 | Reference Guide</A> <A HREF="#CLHEP-ref">[2]</a> and a |
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| 48 | <A HREF="http://cern.ch/clhep/manual/UserGuide"> |
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| 49 | User Guide</A> <A HREF="#CLHEP-man">[3]</a> are available. |
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| 50 | </p> |
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| 51 | |
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| 52 | <b>Origin and current situation of CLHEP</b> |
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| 53 | <p> |
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| 54 | CLHEP started in 1992 as a library for fundamental classes mostly |
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| 55 | needed for, and in fact derived from, the MC event generator MC++ |
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| 56 | written in C++. Since then various authors added classes to this |
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| 57 | package, including several contributions made by developers |
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| 58 | in the Geant4 Collaboration. |
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| 59 | </p> |
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| 60 | <br> |
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| 61 | |
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| 62 | <b>Geant4 and CLHEP</b> |
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| 63 | <p> |
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| 64 | The Geant4 project contributed to the development of CLHEP. |
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| 65 | The random number package, physics units and constants, and some of |
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| 66 | the numeric and geometry classes had their origins in Geant4. |
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| 67 | </p> |
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| 68 | <p> |
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| 69 | Geant4 also benefits from the development of CLHEP. In addition to |
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| 70 | the already mentioned classes for random numbers and numerics, we |
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| 71 | use the classes for points, vectors, and planes and their transformations |
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| 72 | in 3D space, and lorentz vectors and their transformations. Although |
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| 73 | these classes have Geant4 names like G4ThreeVector, these are just |
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| 74 | typedefs to the CLHEP classes. |
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| 75 | </p> |
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| 76 | <P> </P> |
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| 77 | |
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| 78 | <HR> |
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| 79 | |
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| 80 | <table> |
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| 81 | <tr><td valign=top><a name="CLHEP-home">[1]</a> |
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| 82 | <td><a href="http://cern.ch/clhep"> |
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| 83 | cern.ch/clhep</a> |
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| 84 | <tr><td valign=top><a name="CLHEP-ref">[2]</a> |
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| 85 | <td><a href="http://cern.ch/clhep/manual/RefGuide"> |
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| 86 | cern.ch/clhep/manual/RefGuide</a> |
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| 87 | <tr><td valign=top><a name="CLHEP-man">[3]</a> |
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| 88 | <td><a href="http://cern.ch/clhep/manual/UserGuide"> |
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| 89 | cern.ch/clhep/manual/UserGuide</a> |
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| 90 | </table> |
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| 91 | |
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| 92 | <HR> |
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| 93 | <A HREF="../../../../Authors/html/subjectsToAuthors.html"> |
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| 94 | <I>About the authors</I></A> |
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| 95 | |
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| 96 | </BODY> |
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| 97 | </HTML> |
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