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/******************************************************************************
*
*
*
* Copyright (C) 1997-2015 by Dimitri van Heesch.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation under the terms of the GNU General Public License is hereby
* granted. No representations are made about the suitability of this software
* for any purpose. It is provided "as is" without express or implied warranty.
* See the GNU General Public License for more details.
*
* Documents produced by Doxygen are derivative works derived from the
* input used in their production; they are not affected by this license.
*
*/
/*! \page formulas Including formulas
Doxygen allows you to put \LaTeX formulas in the
output (this works only for the HTML, \LaTeX and RTF output. To be able to include
formulas (as images) in the HTML and RTF documentation, you will also need to
have the following tools installed
<ul>
<li>\c latex: the \LaTeX compiler, needed to parse the formulas.
To test I have used the teTeX 1.0 distribution.
<li>\c dvips: a tool to convert DVI files to PostScript files
I have used version 5.92b from Radical Eye software for testing.
<li>\c gs: the GhostScript interpreter for converting PostScript files
to bitmaps. I have used Aladdin GhostScript 8.0 for testing.
</ul>
For the HTML output there is also an alternative solution using
<a href="https://www.mathjax.org">MathJax</a> which does not
require the above tools. If you enable \ref cfg_use_mathjax "USE_MATHJAX" in
the configuration then the latex formulas will be copied to the HTML "as is" and a
client side javascript will parse them and turn them into (interactive) images.
There are three ways to include formulas in the documentation.
<ol>
<li>Using in-text formulas that appear in the running text.
These formulas should be put between a pair of \\f\$
commands, so
\verbatim
The distance between \f$(x_1,y_1)\f$ and \f$(x_2,y_2)\f$ is
\f$\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\f$.
\endverbatim results in:
The distance between \f$(x_1,y_1)\f$ and \f$(x_2,y_2)\f$ is
\f$\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\f$.
<br>
<li>Unnumbered displayed formulas that are centered on a separate line.
These formulas should be put between \\f[ and \\f] commands.
An example:
\verbatim
\f[
|I_2|=\left| \int_{0}^T \psi(t)
\left\{
u(a,t)-
\int_{\gamma(t)}^a
\frac{d\theta}{k(\theta,t)}
\int_{a}^\theta c(\xi)u_t(\xi,t)\,d\xi
\right\} dt
\right|
\f]
\endverbatim
results in:
\f[
|I_2|=\left| \int_{0}^T \psi(t)
\left\{
u(a,t)-
\int_{\gamma(t)}^a
\frac{d\theta}{k(\theta,t)}
\int_{a}^\theta c(\xi)u_t(\xi,t)\,d\xi
\right\} dt
\right|
\f]
<li>Formulas or other latex elements that are not in a math
environment can be specified using \\f{environment}, where
\c environment is the name of the \LaTeX environment,
the corresponding end command is \\f}. Here is an example for an
equation array
\verbatim
\f{eqnarray*}{
g &=& \frac{Gm_2}{r^2} \\
&=& \frac{(6.673 \times 10^{-11}\,\mbox{m}^3\,\mbox{kg}^{-1}\,
\mbox{s}^{-2})(5.9736 \times 10^{24}\,\mbox{kg})}{(6371.01\,\mbox{km})^2} \\
&=& 9.82066032\,\mbox{m/s}^2
\f}
\endverbatim
which results in:
\f{eqnarray*}
g &=& \frac{Gm_2}{r^2} \\
&=& \frac{(6.673 \times 10^{-11}\,\mbox{m}^3\,\mbox{kg}^{-1}\,
\mbox{s}^{-2})(5.9736 \times 10^{24}\,\mbox{kg})}{(6371.01\,\mbox{km})^2} \\
&=& 9.82066032\,\mbox{m/s}^2
\f}
</ol>
For the first two commands one should make sure formulas contain
valid commands in \LaTeX's math-mode. For the third command
the section should contain valid command for the specific environment.
\warning Currently, doxygen is not very fault tolerant in recovering
from typos in formulas. It may be necessary to remove the
files <code>formula.repository</code> that are written to the html, rtf etc. directories to
get rid of an incorrect formula as well as the <code>form_*</code> files.
To have the possibility to define your own \LaTeX commands, for e.g. formula building blocks
or consistent writing of certain words, the configuration option \ref cfg_formula_macrofile "FORMULA_MACROFILE"
can be used. to supply a file with \LaTeX commands.
This file can contain \LaTeX `\newcommand` and `\renewcommand` commands and they are included
formulas (image version and MathJax version) as well as in the generated \LaTeX output (for PDF generation).<br>
The `\newcommand` (and `\renewcommand`) are restricted to a version without optional
parameters so only the following types are supported:
```
\newcommand{\cmd}{replacement}
\newcommand{\cmd}[nr]{replacement}
```
e.g.
```
\newcommand{\E}{\mathrm{E}}
\newcommand{\ccSum}[3]{\sum_{#1}^{#2}{#3}}
```
\htmlonly
Go to the <a href="tables.html">next</a> section or return to the
<a href="index.html">index</a>.
\endhtmlonly
*/
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