minimize rigid {<minimize-rigid-statement>} end
<minimize-rigid-statement> :==
?
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drop=<real>
Expected initial drop in total energy. Default=0.001
tolerance=<real>
Tolerence for early termination of minimization. If the norm
of the gradient of the total energy falls below this value
minimization will stop. Default=0.0001
group=<atom-selection>
Selects atoms that will form a rigid group during minimization,
multiple specification define multiple rigid groups. The group
selections must be disjoint. The default group consists of all
free atoms. This default is overwritten as soon as a group statement
is issued.
translation=<logical>
If false the last group is not translated. If true all groups
are translated. Default=true
Only atoms selected in groups are moved. The target function is the
total energy. Therefore, desired energy terms (such as packing energy,
structure factor difference) should be selectively turned on or
off before invoking this procedure.