<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Macro BOOST_UNITS_DEFINE_CONVERSION_OFFSET</title> <link rel="stylesheet" href="boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="boost_units/Reference.html#header.boost.units.absolute_hpp" title="Header <boost/units/absolute.hpp>"> <link rel="prev" href="boost/units/absolute.html" title="Class template absolute"> <link rel="next" href="boost/units/base_dimension.html" title="Class template base_dimension"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../boost.png"></td> <td align="center"><a href="../../index.html">Home</a></td> <td align="center"><a href="../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="boost/units/absolute.html"><img src="../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="boost_units/Reference.html#header.boost.units.absolute_hpp"><img src="../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="boost/units/base_dimension.html"><img src="../../doc/html/images/next.png" alt="Next"></a> </div> <div class="refentry" title="Macro BOOST_UNITS_DEFINE_CONVERSION_OFFSET"> <a name="BOOST_UNITS_DEFINE_CONVERSION_OFFSET"></a><div class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Macro BOOST_UNITS_DEFINE_CONVERSION_OFFSET</span></h2> <p>BOOST_UNITS_DEFINE_CONVERSION_OFFSET</p> </div> <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="emphasis"><em>// In header: <<a class="link" href="boost_units/Reference.html#header.boost.units.absolute_hpp" title="Header <boost/units/absolute.hpp>">boost/units/absolute.hpp</a>> </em></span>BOOST_UNITS_DEFINE_CONVERSION_OFFSET(From, To, type_, value_)</pre></div> <div class="refsect1" title="Description"> <a name="id1926390"></a><h2>Description</h2> <p>Macro to define the offset between two absolute units. Requires the value to be in the destination units e.g </p> <pre class="programlisting"> BOOST_UNITS_DEFINE_CONVERSION_OFFSET(celsius_base_unit, fahrenheit_base_unit, double, 32.0); </pre> <p> <code class="computeroutput">BOOST_UNITS_DEFINE_CONVERSION_FACTOR</code> is also necessary to specify the conversion factor. Like <code class="computeroutput">BOOST_UNITS_DEFINE_CONVERSION_FACTOR</code> this macro defines both forward and reverse conversions so defining, e.g., the conversion from celsius to fahrenheit as above will also define the inverse conversion from fahrenheit to celsius. </p> </div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2003 -2008 Matthias Christian Schabel, 2007-2008 Steven Watanabe<p> Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="boost/units/absolute.html"><img src="../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="boost_units/Reference.html#header.boost.units.absolute_hpp"><img src="../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="boost/units/base_dimension.html"><img src="../../doc/html/images/next.png" alt="Next"></a> </div> </body> </html>