/*! \page skew_page Skew \n \b Skew mesh quality criterion reflects the angle between the lines that join opposite sides of a quadrangle element or the greatest angle between a median and a midline in a triangle element. This mesh quality criterion can be applied to elements composed of 4 and 3 nodes (quadrangles and triangles). \image html image27.jpg <em>To apply the Skew quality criterion to your mesh:</em> <ol> <li>Display your mesh in the viewer.</li> <li>Choose <b>Controls > Face Controls > Skew</b> or click <em>"Skew"</em> button of the toolbar. \image html image40.png <center><em>"Skew" button </em></center> Your mesh will be displayed in the viewer with its elements colored according to the applied mesh quality control criterion: \image html image93.jpg </li> </ol> <br><b>See Also</b> a sample TUI Script of a \ref tui_skew "Skew quality control" operation. */