+++ /dev/null
-.. _warping_page:
-
-*******
-Warping
-*******
-
-.. image:: ../images/image24.gif
- :align: center
-
-**Warping** indicates that a face is not planar and is applied only to
-2D elements with 4 nodes. This quality control criterion is based on a
-projection plane created by:
-
-#. bisecting the four element edges,
-#. creating a point on the plane at the vector average of the corners, where the x-axis extends from the point to the bisector on edge 2.
-
-The plane normal is in the direction of the cross product of the
-x-axis and the vector from the origin to the bisector of edge 3. Every
-corner of the quad will then be a distance *h* from the plane. The
-length of each half edge is measured and the shortest length is
-assigned *l*. The warp angle is the arcsine of the ratio of the
-projection height *h* to the half edge length *l*.
-
-*To apply the Warping quality criterion to your mesh:*
-
-.. |img| image:: ../images/image39.png
-
-#. Display your mesh in the viewer.
-#. Choose **Controls > Face Controls > Warping Angle** or click *"Warping angle"* button |img| of the toolbar.
-
- Your mesh will be displayed in the viewer with its elements colored according to the applied mesh quality control criterion:
-
- .. image:: ../images/image97.jpg
- :align: center
-
-
-**See Also** a sample TUI Script of a :ref:`tui_warping` filter.
