Dear all. <div><br></div><div>I am working on a metadynamics study. I want to define a collective variable as the distance from an atom to a plane. I have two questions:</div><div>(1) one can define a plane by its normal vector, see</div><div><a href="https://manual.cp2k.org/cp2k-2022_1-branch_with_links/CP2K_INPUT/FORCE_EVAL/SUBSYS/COLVAR/ANGLE_PLANE_PLANE/PLANE.html#list_NORMAL_VECTOR">CP2K_INPUT / FORCE_EVAL / SUBSYS / COLVAR / ANGLE_PLANE_PLANE / PLANE</a><br></div><div>keyword </div><div><br></div><div>NORMAL_VECTOR {Real} {Real} {Real}<br><em>Alternatively to 3 atoms/points one can define one of the two, planes by defining its NORMAL vector.</em> <br></div><div><br></div><div><b>my question</b>: since it's not a fixed vector, how to define a fixed plane?</div><div><br></div><div>(2)the manual emphasizes that </div><div><em>"At least one plane must be defined through atoms."</em><br></div><div><br></div><div><b>my question</b>: for what reason at least one plane must be defined thru atoms? why can't I define all planes thru normal vectors?</div><div><br></div><div>Thanks! </div><div>Alh.</div>
<p></p>
-- <br />
You received this message because you are subscribed to the Google Groups "cp2k" group.<br />
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp2k+unsubscribe@googlegroups.com">cp2k+unsubscribe@googlegroups.com</a>.<br />
To view this discussion on the web visit <a href="https://groups.google.com/d/msgid/cp2k/2667b068-3478-4d28-8f78-0cb40df96879n%40googlegroups.com?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/cp2k/2667b068-3478-4d28-8f78-0cb40df96879n%40googlegroups.com</a>.<br />