Medial Axis Projection algorithm can be used for meshing faces with
sinuous borders and having channel-like shape, for which is it
difficult to define 1D hypotheses so that generated quadrangles to be
-of good shape.
+of good shape. The algorithm can be also applied to faces with ring
+topology, which can be viewed as a closed 'channel'. In the latter
+case radial discretization of a ring can be specified by
+using <em>Number of Layers</em> or <em>Distribution of Layers</em>
+hypothesis.
-\image html quad_from_ma_mesh.png "A mesh of a river model"
+\image html quad_from_ma_mesh.png "A mesh of a river model to the left and of a ring-face to the right"
The algorithm assures good shape of quadrangles by constructing Medial
Axis between sinuous borders of the face and using it to
-discretize the borders.
+discretize the borders. (Shape of quadrangles can be not perfect at
+locations where opposite sides of a 'channel' are far from being parallel.)
\image html quad_from_ma_medial_axis.png "Medial Axis between two blue sinuous borders"
