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| 2 | <TITLE>
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| 4 |
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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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| 8 |
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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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| 13 | <IMG SRC="../../../../resources/html/IconsGIF/Previous.gif" ALT="Previous"></A>
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| 14 | <A HREF="templateLib.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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