an>
        <span class="n">point_dim</span><span class="p">:</span> <span class="nb">int</span><span class="o">=</span><span class="kc">None</span>
        <span class="p">)</span><span class="o">-&gt;</span><span class="n">Tuple</span><span class="p">[</span><span class="n">Tensor</span><span class="p">,</span> <span class="n">Tensor</span><span class="p">,</span> <span class="nb">int</span><span class="p">,</span> <span class="nb">int</span><span class="p">]:</span>
    <span class="sd">&quot;&quot;&quot