Merge branch 'hydro/imps_2015' into V7_dev

[modules/smesh.git] / doc / salome / gui / SMESH / input / quad_from_ma_algo.doc

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 976783d40d419e0ed54b91b78b9017dab38a0ea7..e3df9e4a51cb28f6c1593f70c9c1d25cbb361744 100644 (file)
--- a/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc
+++ b/doc/salome/gui/SMESH/input/quad_from_ma_algo.doc
@@ -3,28 +3,33 @@
 \page quad_from_ma_algo_page Medial Axis Projection Quadrangle meshing algorithm
 
 Medial Axis Projection algorithm can be used for meshing faces with
 \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
 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 "Media Axis between two blue sinuous borders"
+\image html quad_from_ma_medial_axis.png "Medial Axis between two blue sinuous borders"

 
 The Medial Axis is used in two ways:
 <ol>
 
 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>
   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
   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>
 
 */
 </ol>
 
 */