="comment">% mpData - material point structured array. Function requires:</span>
0019 <span class="comment">%           mpM   : material point mass</span>
0020 <span class="comment">%           nIN   : nodes linked to the material point</span>
0021 <span class="comment">%           Svp   : basis functions for the material point</span>
0022 <span class="comment">%           fp    : point forces at material points</span>
0023 <span class="comment">%-------------------------------------------------------------