/*! \page aspect_ratio_page Aspect Ratio \n The <b>Aspect Ratio</b> quality criterion for mesh elements reveals the degree of conformity of a mesh element to the regular element of its type (with all edges having the same length). - The <b>Aspect Ratio</b> of a \b triangle 2D element consisting of 3 nodes is calculated by the formula: \image html formula4.png - The <b>Aspect Ratio</b> of a \b quadrangle 2D element consisting of 4 nodes is calculated using The Verdict Geometric Quality Library available within VTK. The calculation formula is: \image html formula5.png <em>To apply the Aspect Ratio quality criterion to your mesh:</em> <ol> <li>Display your mesh in the viewer.</li> <li>Choose <b>Controls > Face Controls > Aspect Ratio</b> or click <em>"Aspect Ratio"</em> button in the toolbar. <center> \image html image37.png <em>"Aspect Ratio" 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 image94.jpg </li> </ol> <br><b>See Also</b> a sample TUI Script of an \ref tui_aspect_ratio "Aspect Ratio quality control" operation. */