             contact_vel_n_.push_back(&amp;(contact_particles_[k]-&gt;vel_));</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;                    contact_p_.push_back(&amp;(contact_particles_[k]-&gt;p_));</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;                    riemann_solvers_.push_back(RiemannSolverType(*contact_material_[k], *contact_material_[k]));</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span