<tt>constrainatoms = [ <i>n i<sub>1</sub> i<sub>2</sub> &hellip; i<sub>n</sub> </i> ]</tt>

<p>
When <tt><i>n</i></n></tt> > 0, 
then atoms <tt>i<sub>1</sub> i<sub>2</sub> &hellip; i<sub>n</sub> </i></tt>
will be constrained in the hyperplane perpendicular to <tt>SR2 - SR1</tt>, which are two
configurations set by <tt>setconfig1</tt> and <tt>setconfig2</tt>.

<p>
Also see <tt>constrainedMD</tt>, <tt>constrainedrelax</tt>.
