   </span><span class="keyword">def</span><span> </span><span class="declaration-name">specular</span><span>(</span><span class="identifier">n</span><span>: </span><span class="identifier">vec3</span><span>, </span><span class="identifier">l</span><span>: </span><span class="identifier">vec3</span><span>, </span><span class="identifier">e</span><span>: </span><span class="identifier">vec3</span><span>, </span><span class="identifier">s</span><span>: </span><span class="type-name">Float</span><span>): </span