/*! \page split_to_tetra_page Splitting volumes into tetrahedra \n This operation allows to split volumic elements into tetrahedra. 2D mesh is modified accordingly. To split volumes:
  1. Display a mesh or a submesh in the 3D viewer.
  2. In the \b Modification menu select the Split into Tetrahedra item or click "Split into Tetrahedra" button in the toolbar. \image html split_into_tetra_icon.png
    "Split into Tetrahedra" button
    The following dialog box will appear: \image html split_into_tetra.png \par
  3. Click the \b Apply or Apply and Close button to confirm the operation.
*/