<strong>rgl</strong> requires that <a href="https://www.xquartz.org/" class="external-link">XQuartz</a> be installed. After installing XQuartz, it‚Äôs necessary either to log out of and back into your macOS account or to reboot your Mac.</p>
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<div class="section level2">
<h2 id="topics-">Topics üç™<a class="anchor" aria-label="anchor" href="#topics-"></a>
</h2>
<p>The functions in this package are grouped under the following topics</p>
<ol style="list-style-type: decimal">
<li>
<strong>Conv