Fix all atoms that are on one side of a plane specified in crystal coordinate system,
i.e. by Miller indices.
This command allows one to expose crystallograhic planes for visualization.

<p>
Usage: <tt>input = [ <i>ind nx ny nz x0 y0 z0</i> ] makecut</tt>

<p>
<tt><i>ind</i> = 1</tt> or <tt>-1</tt> allows one to easily flip the positive direction
of the plane.
<br>
<tt><i>nx, ny, nz,</i></tt> specify the normal vector of the plane in crystal coordinate
system (i.e. by Miller indices, such as 1 1 -1).  This means that before calling <tt>makecut</tt>
the array <tt>latticesize</tt> must be assigned to the values that were used to create the perfect 
crystal in the first place.  The program needs that information to figure out the relationship
between the crystal coordinate system and the lab coordinate system.
<br>
<tt><i>x0, y0, z0</i></tt> is a point on the plane.

<p>
Also see <tt>removefixedatoms</tt>.


