/*! \page split_to_tetra_page Splitting volumes \n This operation allows to split either any volumic elements into tetrahedra or hexahedra into prisms. 2D mesh is modified accordingly. To split volumes:
  1. Display a mesh, a sub-mesh or a group in the 3D viewer.
  2. In the \b Modification menu select the Split Volumes item or click "Split Volumes" button in the toolbar. \image html split_into_tetra_icon.png
    "Split Volumes" button
    The following dialog box will appear: \image html split_into_tetra.png
    First it is possible to select the type of operation: - If \b Tetrahedron button is checked, the operation will split volumes of any type into tetrahedra. - If \b Prism button is checked, the operation will split hexahedra into prisms.
  3. Click \b Apply or Apply and Close button to confirm the operation.
*/