lass="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">pos_f</span><span class="p">[</span><span class="n">v</span><span class="p">][</span><span class="mi">0</span><span class="p">],</span><span class="bp">self</span><span class="o">.</span><span class="n">delta</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">f</span><span class="p">[</span><span class="n">v</span><span class="p">])</span></div>


<div class="viewcode-block" 