      acc_prior_(particles_-&gt;acc_prior_),</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;                  acc_ave_(*particles_-&gt;AverageAcceleration()), n_(particles_-&gt;n_)</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            {</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;                particles_-&gt;registerVariable(<a class="code" href="class_s_p_h_1_1solid__dynamics_1_1_base_fluid