X-Git-Url: http://git.salome-platform.org/gitweb/?p=modules%2Fsmesh.git;a=blobdiff_plain;f=doc%2Fsalome%2Fgui%2FSMESH%2Finput%2Fsewing_meshes.doc;h=8b7bb76c4848d79807fc7b993fe88b10fd4cfadb;hp=c3afbf1e07fe43515666cba75520fda59eac46a9;hb=02ac54c6f33c5437c1d2204d704cf3da6fd31a8e;hpb=0635c9fc80f67d1e5dc0e94ec85f487286a92070

diff --git a/doc/salome/gui/SMESH/input/sewing_meshes.doc b/doc/salome/gui/SMESH/input/sewing_meshes.doc
index c3afbf1e0..8b7bb76c4 100644
--- a/doc/salome/gui/SMESH/input/sewing_meshes.doc
+++ b/doc/salome/gui/SMESH/input/sewing_meshes.doc
@@ -2,7 +2,7 @@
 
 \page sewing_meshes_page Sewing meshes
 
-\n In SMESH you can sew elements of  different meshes. The current
+\n In SMESH you can sew elements of a mesh. The current
 functionality allows you to sew:
 <ul>
 <li>\ref free_borders_anchor "Free borders"</li>
@@ -13,7 +13,7 @@ functionality allows you to sew:
 
 \image html sewing.png "Sewing button"
 
-<em>To sew elements of different meshes:</em>
+<em>To sew elements of a mesh:</em>
 <ol>
 <li>From the \b Modification menu choose the \b Transformation item
 and from its sub-menu select the \b Sewing item.</li>
@@ -27,7 +27,13 @@ the type of sewing operation you would like to perform.</li>
 \anchor free_borders_anchor
 <h2>Sew free borders</h2>
 
-This functionality allows you to unite two free borders of a 2D mesh.
+This functionality allows you to unite free borders of a 2D mesh.
+
+There are two working modes: \a Automatic and \a Manual. In the \b
+Automatic mode, the program finds free borders coincident within a
+certain tolerance and sew them. Optionally it is possible to adjust
+the found free borders before sewing. In the \b Manual mode you are to
+define borders to sew by picking three nodes of each border.
 
 \image html sewing1.png
 
@@ -50,6 +56,16 @@ corresponding end nodes of two borders will be merged. Intermediate
 nodes of two borders will be either merged or inserted into faces of
 the opposite border.
 
+In practice the borders to sew often coincide and in this case it is
+difficult to specify the first and the last nodes of a border since
+they coincide with the first and the last nodes of the other
+border. To cope with this,
+\ref merging_nodes_page "merge" coincident nodes into one
+beforehand. Two figures below illustrate this approach.
+\image html sew_using_merge.png "Merge coincident nodes which are difficult to distinguish"
+<br>
+\image html sew_after_merge.png "After merging nodes it is easy to specify border nodes"
+
 The sewing algorithm is as follows:
 <ol>
 <li>The parameter (U) of each node within a border is computed. So
@@ -158,4 +174,4 @@ nodes in 3D viewer or define them by its id.
 <b>See Also</b> a sample TUI Script of a 
 \ref tui_sew_side_elements "Sew Side Elements" operation.  
 
-*/
\ No newline at end of file
+*/