t from base object</span>
            <span class="comment">% Assumption: cutoff ratio applies to particle radius</span>
            <span class="keyword">switch</span> (this.pwInteractionType(p,w))
                <span class="keyword">case</span> 1
                    this.kinpw_sph_line.setRelPos(p,w);
                    <span class="keyword">if</span> (addVL &amp;&amp; this.kinpw_sph_line.separ &lt; this.verlet_dist)
                        p.verlet_w(end+1) = w;
                    <span class="keywor