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<div class="section" id="fix-lineforce-command">
<span id="index-0"></span><h1>fix lineforce command</h1>
<div class="section" id="syntax">
<h2>Syntax</h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">fix</span> <span class="n">ID</span> <span class="n">group</span><span class="o">-</span><span class="n">ID</span> <span class="n">lineforce</span> <span class="n">x</span> <span class="n">y</span> <span class="n">z</span>
</pre></div>
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<ul class="simple">
<li>ID, group-ID are documented in <a class="reference internal" href="fix.html"><span class="doc">fix</span></a> command</li>
<li>lineforce = style name of this fix command</li>
<li>x y z = direction of line as a 3-vector</li>
</ul>
</div>
<div class="section" id="examples">
<h2>Examples</h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">fix</span> <span class="n">hold</span> <span class="n">boundary</span> <span class="n">lineforce</span> <span class="mf">0.0</span> <span class="mf">1.0</span> <span class="mf">1.0</span>
</pre></div>
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</div>
<div class="section" id="description">
<h2>Description</h2>
<p>Adjust the forces on each atom in the group so that only the component
of force along the linear direction specified by the vector (x,y,z)
remains. This is done by subtracting out components of force in the
plane perpendicular to the line.</p>
<p>If the initial velocity of the atom is 0.0 (or along the line), then
it should continue to move along the line thereafter.</p>
</div>
<div class="section" id="restart-fix-modify-output-run-start-stop-minimize-info">
<h2>Restart, fix_modify, output, run start/stop, minimize info</h2>
<p>No information about this fix is written to <a class="reference internal" href="restart.html"><span class="doc">binary restart files</span></a>. None of the <a class="reference internal" href="fix_modify.html"><span class="doc">fix_modify</span></a> options
are relevant to this fix. No global or per-atom quantities are stored
by this fix for access by various <a class="reference internal" href="Section_howto.html#howto-15"><span class="std std-ref">output commands</span></a>. No parameter of this fix can
be used with the <em>start/stop</em> keywords of the <a class="reference internal" href="run.html"><span class="doc">run</span></a> command.</p>
<p>The forces due to this fix are imposed during an energy minimization,
invoked by the <a class="reference internal" href="minimize.html"><span class="doc">minimize</span></a> command.</p>
</div>
<div class="section" id="restrictions">
<h2>Restrictions</h2>
<blockquote>
<div>none</div></blockquote>
</div>
<div class="section" id="related-commands">
<h2>Related commands</h2>
<p><a class="reference internal" href="fix_planeforce.html"><span class="doc">fix planeforce</span></a></p>
<p><strong>Default:</strong> none</p>
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