X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=doc%2Fsalome%2Fgui%2FSMESH%2Finput%2F2d_meshing_hypo.doc;h=dd42e9962c130c5b30361c1751e2f5a1643db6ef;hb=refs%2Ftags%2FV5_1_3_patch03;hp=31538fc42b859e3a2b2834c519f234fba943ee30;hpb=55510e5ccd337f72bb1caa755b131cf0916d91b3;p=modules%2Fsmesh.git

diff --git a/doc/salome/gui/SMESH/input/2d_meshing_hypo.doc b/doc/salome/gui/SMESH/input/2d_meshing_hypo.doc
index 31538fc42..dd42e9962 100644
--- a/doc/salome/gui/SMESH/input/2d_meshing_hypo.doc
+++ b/doc/salome/gui/SMESH/input/2d_meshing_hypo.doc
@@ -23,6 +23,8 @@ which will compose the mesh of these 2D faces.
 
 \image html a-maxelarea.png
 
+\n
+
 \image html max_el_area.png "In this example, Max. element area is very small compared to the 1D hypothesis"
 
 <b>See Also</b> a sample TUI Script of a 
@@ -43,16 +45,26 @@ length calculated as an average edge length for a given wire.
 \anchor hypo_quad_params_anchor
 <h2>Quadrangle parameters</h2>
 
-<b>Quadrangle parameters</b> is a general hypothesis for
-Quadrangle (Mapping). This hypothesis gives a possibility
-of using Quadrangle (Mapping) mechanism for faces built on 3 edges. 
-The hypothesis requires some vertex to be selected from the face; this vertex will be
-used as degenerated edge. The resulting mesh will include several triangles near this
-vertex. Hypothesis construction and resulting mesh is displayed at the following figures:
+<b>Quadrangle parameters</b> is a hypothesis for
+Quadrangle (Mapping), which allows using this algorithm for meshing of
+triangular faces.In this case it is necessary to select the <b>Base vertex</b> 
+used as a degenerated edge.
+
+\image html hypo_quad_params_1.png "A face built from 3 edges"
+
+\image html hypo_quad_params_res.png "The resulting mesh"
+
+This hypothesis can be also used to mesh a segment of a circular face.
+Please, consider that there is a limitation on the selectiion of the degenerated
+vertex for the faces built with the angle > 180 degrees (see the picture).
+
+\image html hypo_quad_params_2.png "3/4 of a circular face"
 
-\image html hypo_quad_params_1.png
+In this case, selection of a wrong vertex for the <b>Quadrangle parameters</b>
+hypothesis will generate a wrong mesh. The picture below
+shows the good (left) and the bad (right) results of meshing.
 
-\image html hypo_quad_params_res.png
+\image html hypo_quad_params_res_2.png "The resulting meshes"
 
 <br>
 \anchor quadrangle_preference_anchor