/span> fill, <span class="at">alpha =</span> alpha)</span>
<span id="cb25-3"><a href="#cb25-3" aria-hidden="true" tabindex="-1"></a>}</span>
<span id="cb25-4"><a href="#cb25-4" aria-hidden="true" tabindex="-1"></a>poly1 <span class="ot">&lt;-</span> <span class="fu">polygon_layer</span>(<span class="at">x =</span> <span class="fu">c</span>(<span class="dv">1</span>, <span class="dv">0</span>, <span class="dv">0</span>), <span class="at">y =</span> <span class="fu">c</span>(<span class="dv">0</span>, <span c