X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=doc%2Fsalome%2Fgui%2FSMESH%2Finput%2Fquad_from_ma_algo.doc;h=f7312ee12393f7a392b1b8205d51bfab885d9d62;hb=90e0893c89027a434e832eb72eeac85391b909e9;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..f7312ee12 100644
--- a/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc
+++ b/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc
@@ -3,28 +3,34 @@
 \page quad_from_ma_algo_page Medial Axis Projection Quadrangle meshing algorithm
 
 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.
+sinuous borders and a channel-like shape, for which it can be
+difficult to define 1D hypotheses such that to obtain a good shape of
+resulting quadrangles. 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
+The algorithm provides proper 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"
 
 The Medial Axis is used in two ways:
 <ol>
-<li>If there is a sub-mesh on either sinuous border, then the nodes of
+<li>If there is a sub-mesh on a sinuous border, then the nodes of
   this border are mapped to the opposite border via the Medial
   Axis.</li>
-<li> If there is no sub-meshes on the sinuous borders, then a part of
+<li> If there are no sub-meshes on sinuous borders, then the 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,
-  and the division points are mapped from the Medial Axis to the both
-  borders.</li>
+  using a 1D hypothesis assigned to the face or its ancestor shapes,
+  and the division points are mapped from the Medial Axis to both
+  borders to find positions of nodes.</li>
 </ol>
 
+\image html quad_from_ma_ring_mesh.png "Mesh depends on defined sub-meshes: to the left - sub-meshes on both wires, to the right - a sub-mesh on internal wire only"
 */