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<title>PHPC - nBody project: /media/lmunier/Data/EPFL/Master/2eme_annee/Semestre_2/Parallel_and_High_Performance_Computing/phpc_nBody/src/main.cpp File Reference</title>
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<div class="textblock"><code>#include &quot;<a class="el" href="constants_8hpp_source.html">constants.hpp</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="Cell_8hpp_source.html">Cell.hpp</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="Particle_8hpp_source.html">Particle.hpp</a>&quot;</code><br />
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<tr class="memitem:a82700db82ee07ab77812675eb242adcb"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="main_8cpp.html#a82700db82ee07ab77812675eb242adcb">generate_data</a> (<a class="el" href="classTree_1_1Cell.html">Cell</a>&lt; Type &gt; *root, Type vec)</td></tr>
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<tr class="memitem:a681cb8052eaf74bf6a20944463e1245c"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="main_8cpp.html#a681cb8052eaf74bf6a20944463e1245c">update_load</a> (<a class="el" href="classTree_1_1AbstractType.html">AbstractType</a>&lt; Type &gt; *head, <a class="el" href="classTree_1_1AbstractType.html">AbstractType</a>&lt; Type &gt; *part_loaded=nullptr)</td></tr>
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<tr class="memitem:a67b3a1e4c0de5efc1349aa76ab16c3d4"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="main_8cpp.html#a67b3a1e4c0de5efc1349aa76ab16c3d4">update_particles_pos</a> (<a class="el" href="classTree_1_1AbstractType.html">AbstractType</a>&lt; Type &gt; *root, int iter, const string &amp;dir)</td></tr>
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Variables</h2></td></tr>
<tr class="memitem:a29673983ae2c3b096df5467c9a6aedef"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="main_8cpp.html#a29673983ae2c3b096df5467c9a6aedef">NB_PARTICLES</a></td></tr>
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<tr class="memitem:a57c2e3242b5c1609c3fdef7adc393ad5"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="main_8cpp.html#a57c2e3242b5c1609c3fdef7adc393ad5">SIDE</a></td></tr>
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<tr class="memitem:a6787ce3acaff08051d67ce0709e88983"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="main_8cpp.html#a6787ce3acaff08051d67ce0709e88983">SHIFT</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><dl class="section author"><dt>Author</dt><dd>Munier Louis </dd></dl>
<dl class="section date"><dt>Date</dt><dd>30.05.19 </dd></dl>
<dl class="section version"><dt>Version</dt><dd>1.0</dd></dl>
<p>Main file of the nBody project. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a466be6c0c04ce5721743fb4ad809327f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a466be6c0c04ce5721743fb4ad809327f">&#9670;&nbsp;</a></span>barnes_hut()</h2>
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<div class="memproto">
<div class="memtemplate">
template&lt;typename Type &gt; </div>
<table class="memname">
<tr>
<td class="memname">void barnes_hut </td>
<td>(</td>
<td class="paramtype">Type&#160;</td>
<td class="paramname"><em>vec_dim</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const string &amp;&#160;</td>
<td class="paramname"><em>dir</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Barnes hut part of the algorithm.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">Type</td><td>of the vector, 2D or 3D (and int, float, etc ...) </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">vec_dim</td><td>vector of the dimensions of the overall area where particles are generated </td></tr>
<tr><td class="paramname">dir</td><td>to have filepath where write all the values if needed </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="a82700db82ee07ab77812675eb242adcb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a82700db82ee07ab77812675eb242adcb">&#9670;&nbsp;</a></span>generate_data()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename Type &gt; </div>
<table class="memname">
<tr>
<td class="memname">void generate_data </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classTree_1_1Cell.html">Cell</a>&lt; Type &gt; *&#160;</td>
<td class="paramname"><em>root</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">Type&#160;</td>
<td class="paramname"><em>vec</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Generate NB_PARTICLES particles and call function to store them.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">Type</td><td>of the vector, 2D or 3D (and int, float, etc ...) </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">root</td><td>pointer to initial Cell of the tree to construct </td></tr>
<tr><td class="paramname">vec</td><td>vector to give the Type of the vector to the template function </td></tr>
</table>
</dd>
</dl>
<p>Generate random coordinate for a new particle and shift it if it stays in boundaries to stress application</p>
<p>Initialize quadtree/octree</p>
<p>Create new particle</p>
</div>
</div>
<a id="a0ddf1224851353fc92bfbff6f499fa97"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0ddf1224851353fc92bfbff6f499fa97">&#9670;&nbsp;</a></span>main()</h2>
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<td class="memname">int main </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>argc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>argv</em>[]&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>If PRINT is defined, generate a csv file to display animation of the result in external software (e.g. paraview).</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">Type</td><td>of the vector, 2D or 3D (and int, float, etc ...) </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">particle</td><td>pointer on the particle to write in csv file </td></tr>
<tr><td class="paramname">iter</td><td>iteration to change filename </td></tr>
<tr><td class="paramname">dir</td><td>to have filepath where write all the valuesMain function, compute time to solve problem and store size of the overall area where particle are studied.</td></tr>
<tr><td class="paramname">argc</td><td>default input in c++ main function </td></tr>
<tr><td class="paramname">argv</td><td>default input in c++ main function </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>success if no errors are reached </dd></dl>
<p>Print all the parameters</p>
</div>
</div>
<a id="a681cb8052eaf74bf6a20944463e1245c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a681cb8052eaf74bf6a20944463e1245c">&#9670;&nbsp;</a></span>update_load()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename Type &gt; </div>
<table class="memname">
<tr>
<td class="memname">void update_load </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classTree_1_1AbstractType.html">AbstractType</a>&lt; Type &gt; *&#160;</td>
<td class="paramname"><em>head</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classTree_1_1AbstractType.html">AbstractType</a>&lt; Type &gt; *&#160;</td>
<td class="paramname"><em>part_loaded</em> = <code>nullptr</code>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Update the load applied to a particle by implementation a Depth First Search on the quadtree/octree data-structure.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">Type</td><td>of the vector, 2D or 3D (and int, float, etc ...) </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">head</td><td>pointer to the current cell of the tree </td></tr>
<tr><td class="paramname">part_loaded</td><td>pointer to the current particle for which the load is computed </td></tr>
</table>
</dd>
</dl>
<p>If next element is empty</p>
<p>If next element is a particle</p>
<p>If next element is a cell</p>
</div>
</div>
<a id="a67b3a1e4c0de5efc1349aa76ab16c3d4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a67b3a1e4c0de5efc1349aa76ab16c3d4">&#9670;&nbsp;</a></span>update_particles_pos()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename Type &gt; </div>
<table class="memname">
<tr>
<td class="memname">void update_particles_pos </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classTree_1_1AbstractType.html">AbstractType</a>&lt; Type &gt; *&#160;</td>
<td class="paramname"><em>root</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>iter</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const string &amp;&#160;</td>
<td class="paramname"><em>dir</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Update position and velocity for each particle. Generate a csv file with all the position if needed.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">Type</td><td>of the vector, 2D or 3D (and int, float, etc ...) </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">root</td><td>pointer on the node of the previous cell </td></tr>
<tr><td class="paramname">iter</td><td>current iteration of the solution </td></tr>
<tr><td class="paramname">dir</td><td>to have filepath where write all the values if needed </td></tr>
</table>
</dd>
</dl>
<p>If next element is empty</p>
</div>
</div>
<a id="acede08ae497ad465159938748e860d6e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#acede08ae497ad465159938748e860d6e">&#9670;&nbsp;</a></span>update_particles_tree()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename Type &gt; </div>
<table class="memname">
<tr>
<td class="memname">void update_particles_tree </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classTree_1_1AbstractType.html">AbstractType</a>&lt; Type &gt; *&#160;</td>
<td class="paramname"><em>root</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Update the current quadtree/octree datastructure with the new position of each particle if they pass to an other cell.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">Type</td><td>of the vector, 2D or 3D (and int, float, etc ...) </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">root</td><td>pointer on the node of the previous cell </td></tr>
</table>
</dd>
</dl>
<p>If next element is empty or is already deleted</p>
<p>If next element is a particle</p>
<p>If next element is a cell</p>
</div>
</div>
<h2 class="groupheader">Variable Documentation</h2>
<a id="a29673983ae2c3b096df5467c9a6aedef"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a29673983ae2c3b096df5467c9a6aedef">&#9670;&nbsp;</a></span>NB_PARTICLES</h2>
<div class="memitem">
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<table class="memname">
<tr>
<td class="memname">int NB_PARTICLES</td>
</tr>
</table>
</div><div class="memdoc">
<p>number of particles for the project </p>
</div>
</div>
<a id="a6787ce3acaff08051d67ce0709e88983"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6787ce3acaff08051d67ce0709e88983">&#9670;&nbsp;</a></span>SHIFT</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">float SHIFT</td>
</tr>
</table>
</div><div class="memdoc">
<p>Shift value to unbalanced uniformity of particles creation </p>
</div>
</div>
<a id="a57c2e3242b5c1609c3fdef7adc393ad5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a57c2e3242b5c1609c3fdef7adc393ad5">&#9670;&nbsp;</a></span>SIDE</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">float SIDE</td>
</tr>
</table>
</div><div class="memdoc">
<p>side of the area considered for the project </p>
</div>
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