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<THIS PAGE NEEDS TO BE REWRITTEN.

IT'S CURRENTLY COMMENTED OUT in CH_tasks.xml and xmlfilelist />

<section id="Section-Tasks-Interfaces">

<title>Interfaces</title>

<para>

The Interfaces Page allows a user to define interfaces on the

&micro;. The layout of the page is similar to the Skeleton

Boundaries Page.

</para>

<para>

Interfaces are similar to skeleton or mesh boundaries in many

respects. When a mesh is created, an element is defined for

each edge belonging to an interface. Each edge element, or

edgement, can contribute to the stiffness matrix if a material

with interface properties such as surface tension is assigned to

the interface. Certain boundary conditions can also be assigned

directly to interfaces. One can also go to the Skeleton

Boundaries page and create a new skeleton boundary based on an

interface definition. In contrast to normal skeleton boundaries,

interfaces (and skeleton boundaries based on these interfaces)

may correspond to a disconnected set of edges in the &mesh;.

</para>

<para>

<xref linkend="Figure-SkelBdyPage"/> illustrates the Interfaces

Page. The Microstructure Chooser at the top selects the &micro;

whose interface definitions are to be edited. The <link

linkend="Section-Interfaces-InterfaceList">Interface List

Pane</link> on the left lists all of the interfaces defined in

the current microstructure, and provides buttons for editing

them. The Interface details pane on the right shows information

about the interface selected in the list.

</para>

<figure id="Figure-InterfacesPage">

<title>The Interfaces Page (TODO: Screen grab for actual interfaces page.)</title>

<mediaobject>

<imageobject>

<imagedata fileref="FIGURES/gui/skelbdy_page.png"

format="PNG"/>

</imageobject>

</mediaobject>

</figure>

<section id="Section-Interfaces-InterfaceList">

<title>The Interfaces List Pane</title>

<para>

Clicking on the name of an interface in the Interfaces pane on

the left column of the page selects that interface and

displays information about it in the Interface details pane on

the right column.

</para>

<para>

The five buttons below the list manipulate interfaces:

<itemizedlist>

<listitem>

<para>

The <link

linkend="MenuItem-OOF.Microstructure.Interface.New"><guibutton>New</guibutton></link>

button defines a new interface given a pixel group, a

material, pairs of pixel groups, or pairs of

materials. The name of the interface will always be

unique from any name in the list of skeleton boundaries

in the same &micro;. The addition of a new interface

causes the &mesh; to be rebuilt.

</para>

</listitem>

<listitem>

<para>

The <link

linkend="MenuItem-OOF.Microstructure.Interface.Rename"><guibutton>Rename</guibutton></link>

button renames the currently selected interface.

</para>

</listitem>

<listitem>

<para>

The <link

linkend="MenuItem-OOF.Microstructure.Interface.Delete"><guibutton>Delete</guibutton></link>

button deletes the currently selected interface from the

&micro;. The removal of an interface causes the &mesh;

to be rebuilt.

</para>

</listitem>

<listitem>

<para>

The <link

linkend="MenuItem-OOF.Material.Interface.Assign"><guibutton>Assign

interface material</guibutton></link> button assigns an

interface material to the interface. When a &mesh; gets

created for the &micro;, the material becomes associated

with the edge &elems; that belong to the interface.

</para>

</listitem>

<listitem>

<para>

The <link

linkend="MenuItem-OOF.Material.Interface.Remove"><guibutton>Remove

material</guibutton></link> button removes or unassigns

any interface material from the interface.

</para>

</listitem>

</itemizedlist>

</para>

</section>

</section>

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