                 this.stiff = 0;
                <span class="keyword">end</span>
            <span class="keyword">end</span>
        <span class="keyword">end</span>

        <span class="comment">%------------------------------------------------------------------</span>
        <span class="keyword">function</span> this = evalForce(this,int)
            <span class="comment">% Force modulus (elastic contribution only)</span>
            f = this.stiff * int.kinemat.ovlp_t;

            <span class="comme