/*!

\page mesh_preferences_page Mesh preferences

In the Mesh module you can set mesh preferences, which can be used in
later sessions with this module.

<h2>General Preferences</h2>

\image html pref21.png

<ul>
<li><b>Automatic Update</b></li>
<ul>
<li>If you toggle <b>Automatic Update</b> checkbox, the model in your
viewer automatically updated whenever you make changes in it.</li>
<li><b>Size limit (elements)</b> - allows to specify the maximum
number of elements in the resulting mesh for which the automatic updating
of the presentation is performed. This option affects only
<b>Compute</b> operation. Zero value means "no limit". Default value
is 500 000 mesh elements.
</ul>
<li><b>Quality Controls</b></li>
<ul>
<li>If you toggle <b>Display entity</b>, both faces and edges of an
object will be displayed in the viewer by default.</li>
<li>If you toggle <b>Use precision</b> checkbox, you can display numbers in
<b>Quality Control</b> diagrams at the necessary level of precision.</li>
<li><b>Number of digits after point</b> - defines precision for <b>Quality Controls</b>. By default, numbers in <b>Quality Control</b>
diagrams are presented as integers.</li>
<li><b>Double nodes tolerance</b> defines the maximal distance between two
mesh nodes, at which they are considered coincident by <b>Double nodes</b>
quality control.
</ul>
<li><b>Display mode</b> - allows to set Wireframe, Shading, Nodes or Shrink
presentation mode as default.</li>
<li><b>Representation of the 2D quadratic elements</b></li>
<ul>
<li><b>Representation of the 2D quadratic elements</b> combobox - allows
to select lines or arcs for representation of quadratic elements.</li>
<li><b>Maximum Angle</b> - maximum deviation angle used by the
application to build arcs. </li>
</ul>
<li><b>Mesh export</b></li>
<ul>
<li>If you toggle <b>Automatically create groups for MED export</b> checkbox,
this operation will be carried out automatically.</li>
<li>If you toggle <b>Automatic renumbering</b> checkbox, the exported
mesh will be renumbered automatically</li>
</ul>
<li><b>Mesh computation</b></li>
<ul>
<li><b>Show a computation result notification</b> combobox allows to
select the notification mode about a mesh computation result.
There are 3 possible modes:</li>
<ul>
<li><b>Never</b> - do not show the result dialog at all;</li>
<li><b>Errors only</b> - the result dialog will be shown if there were
some errors during a mesh computation;</li>
<li><b>Always</b> - show the result dialog after each mesh
computation. This is a default mode.</li>
</ul></ul>
<li><b>Mesh information</b></li>
<ul>
<li><b>Mesh element information</b></li> - Change the way mesh element
information is shown:
<ul>
<li><b>Simple</b> - as a plain text</li>
<li><b>Tree</b> - in a tree-like form</li>
</ul>
<li><b>Automatic nodes compute limit</b></li> - allows to define the size limit for the
mesh groups for which the number of underlying nodes is calculated
automatically. If the group size exceeds the value set in the preferences,
the user will have to press \em Compute button explicitly. Zero value
means "no limit". By default the value is set to 100 000 mesh elements.
</li>
<li><b>Show details on groups in element information tab</b> - when
this option is switched off (default), only names of groups, the node
or element belongs to, are shown in the \ref mesh_element_info_anchor "Info Tab"
tab of "Mesh Information" dialog box. If this option is
switched on, the detail information on groups is shown.</li>
<li><b>Dump base information</b> - Dump base mesh information to the
file, see \ref mesh_infos_page.</li>
<li><b>Dump element information</b> - Dump element information to the
file, see \ref mesh_infos_page.</li>
<li><b>Dump additional information</b> - Dump additional mesh
information to the file, see \ref mesh_infos_page.</li>
</ul>
<li><b>Automatic Parameters</b></li>
<ul>
<li><b>Ratio Bounding Box Diagonal / Max Size</b> - this parameter is
used for automatic meshing: ratio between the bounding box of the
meshed object and the Max Size of segments.</li>
<li><b>Default Number of Segments</b> - allows defining the default
number of segments on each edge</li>
</li></ul>
<li><b>Mesh loading</b></li>
<ul>
<li>If <b>No mesh loading from study file at hypothesis modification</b>
  checkbox is on, the mesh data will not be loaded from the study file
  when a hypothesis is modified. This allows  saving time by omitting
  loading data of a large mesh that is planned to be recomputed with other parameters.</li>
</ul>
<li><b>Input fields precision</b></li>
<ul>
<li><b>Length precision</b> - allows to adjust input precision of coordinates and dimensions.</li>
<li><b>Angular precision</b> - allows to adjust input precision of angles.</li>
<li><b>Length tolerance precision</b> - allows to adjust input precision of tolerance of coordinates and dimensions.</li>
<li><b>Parametric precision</b> - allows to adjust input precision of parametric values.</li>
<li><b>Area precision</b> - allows to adjust input precision of mesh element area.</li>
<li><b>Volume precision</b> - allows to adjust input precision of mesh element volume.</li>
</ul>
<li><b>Preview</b></li>
<ul>
<li><b>Sub-shapes preview chunk size</b> - allows to limit the number
of preview sub-shapes shown in the hypotheses creation dialog boxes,
for example "Reverse Edges" parameter of \ref number_of_segments_anchor "Number of segments" hypothesis. 
</ul>
<li><b>Python Dump</b></li>
<ul>
<li><b>Historical python dump</b> checkbox allows switching between 
  \a Historical and \a Snapshot dump mode. In \a
  Historical mode, Python Dump script includes all commands
  performed by SMESH engine. In \a Snapshot mode, the commands
  relating to objects removed from the Study as well as the commands
  not influencing the current state of meshes are excluded from the script.</li>
</ul>
</ul>

<h2>Mesh Preferences</h2>

\image html pref22.png

<ul>
<li><b>Nodes</b></li>
<ul>
<li><b>Color</b> -  allows to select the color of nodes. Click on the
colored line to access to the <b>Select Color</b> dialog box.</li>
<li><b>Type of marker</b> - allows to define the shape of nodes.</li>
<li><b>Scale of marker</b> - allows to define the size of nodes.</li>
</ul>
<li><b>Elements</b></li>
<ul>
<li><b>Surface color</b>  - allows to select the surface color of elements
(seen in Shading mode). Click on the colored line to access to the <b>Select Color</b> dialog box.</li>
<li><b>Back surface color</b> - allows to select the interior surface color
of elements. Use the slider to select the color generated basing on  
the <b>Surface color</b> by changing its brightness and saturation.</li>
<li><b>Outline color</b> - allows to select the color of element
borders. Click on the colored line to access to the <b>Select Color</b> dialog box.</li>
<li><b>Wireframe color</b> - allows to select the color of borders of
elements in the wireframe mode. Click on the colored line to access to the <b>Select Color</b> dialog box.</li>
<li><b>Width</b> - allows to define the width of lines (edges and borders of elements).</li>
<li><b>Shrink coef.</b> - allows to define relative space of elements
compared to gaps between them in shrink mode.</li>
</ul>
<li><b>Orientation of Faces</b> - allows to define the behavior of
<b>Orientation of faces</b> functionality</li>
<ul>
<li> \b Color - allows to define the color of orientation vertors;</li>
<li> \b Scale - allows to define the size of orientation vectors;</li> 
<li> <b> 3D Vector </b> checkbox allows to choose between 2D planar
and 3D vectors.</li>
</ul>
</ul>

<br><h2>Selection Preferences</h2>

\image html pref23.png

<ul>
<li><b>Selection</b> - performed with mouse-indexing (preselection)
and left-clicking on an object, whose appearance changes as defined in
the <b>Preferences</b>.</li>
<ul>
<li><b>Object Color</b> -  allows to select the color of mesh (edges and
borders of meshes) of the selected entity. Click on the colored line
to access to the <b>Select Color</b> dialog
box.</li>
<li><b>Element color</b> - allows to select the color of surface of selected
elements (seen in Shading mode). Click on the colored line to access
to the <b>Select Color</b> dialog box.</li>
</ul>
<li><b>Preselection</b> - performed with mouse-indexing on an object,
whose appearance changes as defined in the <b>Preferences</b>.</li>
<ul>
<li><b>Highlight Color</b> -  allows to select the color of mesh (edges and
borders of meshes) of the entity . Click on the colored line to access
to the <b>Select Color</b> dialog box.</li>
</ul>
<li><b>Precision</b> - in this menu you can set the value of precision
used for <b>Nodes</b>, <b>Elements</b> and <b>Objects</b>.</li>
</ul>

<br><h2>Scalar Bar Preferences</h2>

\image html pref24.png

<ul>
<li><b>Font</b> - in this menu you can set type, face and color for
the font of <b>Title</b> and <b>Labels</b>.</li>
<li><b>Colors & Labels</b> - in this menu you can set the <b>number of
colors</b> and the <b>number of labels</b> in use.</li>
<li><b>Orientation</b> - here you can choose between vertical and
horizontal orientation of the <b>Scalar Bar</b></li>.
<li><b>Origin & Size Vertical & Horizontal</b> - allows to define
placement (<b>X</b> and <b>Y</b>) and lookout (<b>Width</b> and
<b>Height</b>) of Scalar Bars</li>
<ul>
<li><b>X</b>: abscissa of the point of origin (from the left
side)</li>
<li><b>Y</b>: ordinate of the origin of the bar (from the bottom)</li>
</ul>
<li><b>Distribution</b> in this menu you can Show/Hide distribution histogram of the values of the <b>Scalar Bar</b> and specify the <b>Coloring Type</b> of the histogram</li>
<ul>
<li><b>Multicolor</b> the histogram is colored as <b>Scalar Bar</b></li>
<li><b>Monocolor</b> the histogram is colored as selected with <b>Distribution color</b> selector</li>
</ul>
</ul>

*/