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                <a class="pilcrow" href="#section-20">&#182;</a>
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              <p>Setup the angular range from -π/2 to π/2 to create a “half moon” effect.</p>

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            <div class="content"><div class='highlight'><pre>    angular_range: [-<span class="hljs-built_in">Math</span>.PI/<span class="hljs-number">2</span>, <span class="hljs-built_in">Math</span>