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  <h1>Welcome to Yade - Open Source Discrete Element Method</h1>
   <p style="font-weight: bold">
	The Yade project is a strong community based entirely on peaceful international cooperations. This diverse foundation has bound us to many brilliant scientisits from Ukraine and Russia who are unjustly affected by the current hostilities perpetrated by Russia on Ukraine. 
	We, the Yade developers and users, hope for the immediate cessation of agression followed by the prompt restoration of peace in Ukraine. We stand with the people of Ukraine, the citizens of Russia, and the thousands of Russian scientists who <a href="https://access2perspectives.org/2022/02/an-open-letter-from-russian-scientists-and-science-journalists-against-the-war-with-ukraine/">vehemently protest this war.</a> As these scientists point out, this unlawful invasion puts many innocent lives at risk in both Ukraine and Russia. Without a doubt, we will continue to keep these Ukranians and Russians in our thoughts as we await a peaceful conclusion ahead. 
  </p>  
  <p>
	Yade is an extensible open-source framework for discrete numerical models, focused on the Discrete Element Method. The computation parts are written in c++ using a flexible object model and allowing independent implementation of new algorithms and interfaces. Python is used for rapid and concise scene construction, simulation control, postprocessing and debugging.
  </p>
  Yade is located at <a href="https://yade-dem.org">yade-dem.org</a>, which contains <a href="https://www.yade-dem.org/doc/">this documentation</a> and <a href="https://www.yade-dem.org/wiki/">wiki</a>. Development is kindly hosted on <a href="http://www.launchpad.net/yade">launchpad</a> and <a href="https://gitlab.com/yade-dev"> GitLab </a>; they are used for <a href="https://gitlab.com/yade-dev/trunk">source code</a>, <a href="https://gitlab.com/yade-dev/trunk/issues">bug tracking</a> and <a href="https://launchpad.net/yade/+download">source</a> downloads</a> and more. Building, regression tests and packages distribution are hosted on servers of the <a href="http://geomec.net/newsletter/">Grenoble Geomechanics group</a>  at <a href="https://www.3sr-grenoble.fr/spip.php?rubrique1">Laboratoire 3SR</a>, <a href="https://gricad.univ-grenoble-alpes.fr">UMS Gricad</a> and <a href="https://pg.edu.pl/">Gdańsk University of Technology</a>.
  </p>
  <p>
  Yade supports <a href="{{ pathto("HighPrecisionReal") }}#installation"> high precision calculations</a> (following this <a href="https://www.sciencedirect.com/science/article/pii/S0010465521002794">publication</a>) and Python 3 (see <a href="{{ pathto("installation") }}#python-2-backward-compatibility"> backward compatibility</a> for Python 2). The development branch is on <a href="https://gitlab.com/yade-dev/trunk">GitLab</a>.
  </p>
  <p>
   This documentation describes Yade version {{ version }}, see <a href="https://gitlab.com/yade-dev/trunk/-/releases">changelogs</a>. You can also <a href="http://yade-dem.org/doc/Yade.pdf">download a PDF version</a> of this documentation. 
  </p>
  
  <h2>Acknowledging Yade</h2>

<p style="margin-left: 30px">
     Please make sure you read the <a href="{{ pathto("citing") }}">"Acknowledging Yade"</a> section if you plan to use Yade for publications.
</p>

 <h2>Documentation</h2>

  <table class="contentstable" align="center" style="margin-left: 30px">
    <tr>
      <td width="50%">
        <p class="biglink"><a class="biglink" href="{{ pathto("introduction") }}">Introduction</a><br/>
           <span class="linkdescr">getting familiar with Yade</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("tutorial") }}">Tutorial</a><br/>
           <span class="linkdescr">first steps with practical <a class="link" href="{{ pathto("tutorial-examples") }}">examples</a></span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("user") }}">User's Manual</a><br/>
           <span class="linkdescr">functionality guide and description</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("prog") }}">Programmer's Manual</a><br/>
           <span class="linkdescr">understanding and modifying the internals of Yade</span></p>
      </td>
      <td width="50%">
        <p class="biglink"><a class="biglink" href="{{ pathto("formulation") }}">DEM Formulation</a><br/>
           <span class="linkdescr">the Discrete Element Method (DEM)</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("yade.wrapper") }}">Class reference</a><br/>
           <span class="linkdescr">simulation building blocks, c++ &amp; python</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("modules") }}">Yade modules</a><br/>
           <span class="linkdescr">python modules extending Yade</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("FEMxDEM") }}">Multiscale FEMxDEM</a><br/>
           <span class="linkdescr">Parallel coupling using Escript and Yade</span></p>
      </td>
    </tr>
    <tr>
      <td width="50%">
        <p class="biglink"><a class="biglink" href="{{ pathto("references") }}">References</a><br/>
           <span class="linkdescr">articles cited in the documentation</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("installation") }}">Installation</a><br/>
           <span class="linkdescr">from binaries and sources</span></p>
       <p class="biglink"><a class="biglink" href="{{ pathto("index-toctree") }}">Full contents</a><br/>
           <span class="linkdescr">with all the details</span></p>
      </td>
      <td width="50%">
        <p class="biglink"><a class="biglink" href="{{ pathto("genindex") }}">Index</a><br/>
           <span class="linkdescr">all functions, classes, attributes</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("search") }}">Search</a><br/>
           <span class="linkdescr">search the documentation</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("yadeTechArchive") }}">Yade Technical Archive</a><br/>
           <span class="linkdescr">documents written by and for the Yade community</span></p>
      </td>
    </tr>
  </table>

 <h2>Yade Community</h2>
 
 <table class="contentstable" align="center" style="margin-left: 30px">
    <tr>
      <td width="50%">
        <p class="biglink"><a class="biglink" href="https://yade-dem.org/wiki/Authors_and_contributors">Authors and contributors</a><br/>
           <span class="linkdescr">information about the people working on Yade</span></p>
        <p class="biglink"><a class="biglink" href="https://yade-dem.org/doc/user.html#getting-in-touch-with-yade-community">Public support and Discussions</a><br/>
           <span class="linkdescr">Getting help, getting in touch</span></p>
        <p class="biglink"><a class="biglink" href="https://www.yade-dem.org/doc/publications.html">Publications</a><br/>
           <span class="linkdescr">on Yade itself or done with Yade</span></p>
        <p class="biglink"><a class="biglink" href="https://yade-dem.org/doc/tutorial-more-examples.html">Screenshots and videos</a><br/>
          <span class="linkdescr">Simulation examples; feel free to add yours.</span></p>
      </td>
      <td width="50%">
        <p class="biglink"><a class="biglink" href="https://discord.gg/rku35YXZJd">Discord server</a><br/>
           <span class="linkdescr">A place to meet, chat, and collaborate</span></p>
        <p class="biglink"><a class="biglink" href="https://twitter.com/YadeDEM">Twitter account</a><br/>
           <span class="linkdescr">Follow Yade news and interact with us</span></p>
        <p class="biglink"><a class="biglink" href={{ pathto("consulting") }}>Paid support and Consulting</a><br/>
           <span class="linkdescr">Need professional help?</span></p>
        <p class="biglink"><a class="biglink" href="{{ pathto("events") }}">Yade community events</a><br/>
            <span class="linkdescr">community events</span></p>
      </td>
    </tr>
 </table>
 
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