X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=doc%2Fsalome%2Fgui%2FSMESH%2Finput%2Fquad_from_ma_algo.doc;h=6a90f376e4e63b7de1e9bba8c631fbf7815c1c2a;hb=512d3547bc726e9bb5732b1d0692e1141ca258e1;hp=80c3f59aaf4fd6eb256865742c0d7d660d1379e3;hpb=23d90107acec5e54ded86d9f309fe5cb42720b78;p=modules%2Fsmesh.git

diff --git a/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc b/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc
index 80c3f59aa..6a90f376e 100644
--- a/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc
+++ b/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc
@@ -5,13 +5,18 @@
 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"
 
@@ -22,9 +27,9 @@ The Medial Axis is used in two ways:
   Axis.</li>
 <li> If there is no sub-meshes on the sinuous borders, then a part of
   the Medial Axis that can be mapped to both borders is discretized
-  using a hypothesis assigned to the face or its ancestor shapes,
+  using a 1D hypothesis assigned to the face or its ancestor shapes,
   and the division points are mapped from the Medial Axis to the both
-  borders.</li>
+  borders to find positions of nodes.</li>
 </ol>
 
 */