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<title>GAMGI Interfaces: Atom Modify</title>
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<h1>Atom Modify</h1>
<div id="notebook">
<ul>
<li><a href="modify_element.html">Element</a></li>
<li><a href="modify_property.html">Property</a></li>
<li><a href="modify_analysis.html">Analysis</a></li>
<li><a href="modify_position.html">Position</a></li>
<li><a href="modify_view.html">View</a></li>
<li><span>Length</span></li>
<li><a href="modify_angle.html">Angle</a></li>
</ul>
</div>
<div class="contents">
Change here <b>Length</b> properties between atoms and other objects.
<h3>Property</h3>
The supported <b>Length</b> properties, the same as for <b>Atom->Measure</b>,
are listed below. Atoms and other objects may belong to different parents
and may be bonded or not. Only objects in the current layer can be chosen.
<p/>
An easy technique to select the objects is to click the mouse
sucessively over their visual representations, in the sequence
shown in the dialog.
<p/><b>2-Atom Distance</b><p/>
The distance between Atom1 and Atom2.
<p/><b>Atom 2-Atom Distance</b><p/>
The distance between Atom1 and the direction defined by Atom2-Atom3.
<p/><b>Atom 3-Atom Distance</b><p/>
The distance between Atom1 and the plane defined by Atom2-Atom3-Atom4.
<p/><b>Atom Direction Distance</b><p/>
The distance between an Atom and a Direction.
<p/><b>Atom Plane Distance</b><p/>
The distance between an Atom and a Plane.
<h3>Value</h3>
After selecting the property and the objects, set <b>Value</b>
to the desired length and press <b>Ok</b> to activate the change.
An error is shown when some of the objects are not recognized,
or when the changing direction cannot be determined.
<p/>
For all properties, of all the objects selected by users only
the first atom is actually translated. Atoms bonded to the first
atom are also translated, as long as they are not bonded by cyclic
structures to any of the other selected objects (without this
restriction, all atoms in a ring would be translated!).
<p/>
For all properties, the direction between the first atom and the
other objects is always preserved. <b>Value</b> can take negative
values, in which case the first atom and the other modified atoms
are reflected to the other side of the reference objects.
<p/>
When a calculation ends, GAMGI keeps the objects identification.
To start a new calculation, just click the mouse over a new object:
GAMGI automatically cleans the previous data and inserts the new
object identification. When a new property or page is chosen,
previous data is automatically removed.
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