/*!

\page preview_meshes_page Preview and Compute meshes

Before whole mesh computation it is allowed to see the mesh preview.
When mesh object is already created and all hypotheses assigned,
select your mesh in the <b>Object Browser</b>. From the
\b Mesh menu select \b Preview or click "Preview" button of the
toolbar or activate "Preview" item from pop-up menu.

\image html mesh_precompute.png
<center><em>"Preview" button</em></center>

The Mesh Preview dialog box appears. In this dialog box you can select
preview mode <b>1D mesh</b> or <b>2D mesh</b> depending on assigned
hypotheses to mesh. 

The 1D mesh preview shows as nodes computed on geometry edges

\image html preview_mesh_1D.png

The 2D mesh preview shows edge mesh elements, computed on geometry faces

\image html preview_mesh_2D.png

Pressing <b>Compute</b> button leads to whole mesh computation
process.
During exit from Preview dialog box, the question about storage temporary
created mesh elements appers:

\image html preview_tmp_data.png

Note, that computed temporary mesh elements can be reused during next
mesh computation process.

*/