X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=doc%2Fsalome%2Fgui%2FSMESH%2Finput%2F2d_meshing_hypo.doc;h=d72e4d50459e39613ca3ac0bca641acd810f497a;hb=9c2ce3dffb1f26145f6ab49ebe9c9bb61254725b;hp=05ab6dd362b8301c7068ee1429325fe0a82086f5;hpb=79b1ac2b6df9117f16f11d444b1f165d477a1813;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 05ab6dd36..d72e4d504 100644
--- a/doc/salome/gui/SMESH/input/2d_meshing_hypo.doc
+++ b/doc/salome/gui/SMESH/input/2d_meshing_hypo.doc
@@ -6,7 +6,7 @@
 <ul>
 <li>\ref max_element_area_anchor "Max Element Area"</li>
 <li>\ref length_from_edges_anchor "Length from Edges"</li>
-<li>\ref quadrangle_preference_anchor "Quadrangle Preference"</li>
+<li>\ref hypo_quad_params_anchor "Quadrangle parameters"</li>
 </ul>
 
 <br>
@@ -21,7 +21,9 @@ which will compose the mesh of these 2D faces.
 
 \image html a-maxelarea.png
 
-\image html max_el_area.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 
 \ref tui_max_element_area "Maximum Element Area" hypothesis
@@ -38,14 +40,63 @@ length calculated as an average edge length for a given wire.
 \ref tui_length_from_edges "Length from Edges" hypothesis operation.
 
 <br>
-\anchor quadrangle_preference_anchor
-<h2>Quadrangle Preference</h2>
+\anchor hypo_quad_params_anchor
+<h2>Quadrangle parameters</h2>
+
+\image html hypo_quad_params_dialog.png "Quadrangle parameters creation/edition dialog"
+
+<b>Quadrangle parameters</b> is a hypothesis for Quadrangle (Mapping).
+
+<b>Base vertex</b> parameter allows using Quadrangle (Mapping)
+algorithm for meshing of triangular faces. In this case it is
+necessary to select the vertex, which will be used as the fourth edge
+(degenerated).
+
+\image html hypo_quad_params_1.png "A face built from 3 edges"
+
+\image html hypo_quad_params_res.png "The resulting mesh"
+
+This parameter can be also used to mesh a segment of a circular face.
+Please, consider that there is a limitation on the selection of the
+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"
+
+In this case, selection of a wrong vertex for the <b>Base vertex</b>
+parameter 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_2.png "The resulting meshes"
+
+<b>Type</b> parameter is used on faces with a different number of
+segments on opposite sides to define the algorithm of transition
+between them. The following types are available:
+
+<ul>
+<li><b>Standard</b> is the default case, when both triangles and quadrangles
+    are possible in the transition area along the finer meshed sides.</li>
+<li><b>Triangle preference</b> forces building only triangles in the
+    transition area along the finer meshed sides.
+    <i>This type corresponds to <b>Triangle Preference</b> additional
+    hypothesis, which is obsolete now.</i></li>
+<li><b>Quadrangle preference</b> forces building only quadrangles in the
+    transition area along the finer meshed sides. This hypothesis has a
+    restriction: the total quantity of segments on all
+    four sides of the face must be even (divisible by 2).</li>
+    <i>This type corresponds to <b>Quadrangle Preference</b>
+    additional hypothesis, which is obsolete now.</i></li>
+<li><b>Quadrangle preference (reversed)</b> works in the same way and
+with the same restriction as <b>Quadrangle preference</b>, but
+    the transition area is located along the coarser meshed sides.</li>
+<li><b>Reduced</b> type forces building only quadrangles and the transition
+    between the sides is made gradually, layer by layer. This type has
+    a limitation on the number of segments: one pair of opposite sides must have
+    the same number of segments, the other pair must have an even difference
+    between the numbers of segments on the sides.</li>
+</ul>
+
+<b>See Also</b> a sample TUI Script of a 
+\ref tui_quadrangle_parameters "Quadrangle Parameters" hypothesis.
 
-This algorithm can be used only together with Quadrangle (Mapping)
-algorithm. It allows to build quadrangular meshes even if the number
-of nodes at the opposite edges of a meshed face is not equal,
-otherwise this mesh will contain some triangular elements.
 <br>
-This hypothesis has one restriction on its work: the total quantity of
-segments on all four sides of the face must be even (divisible by 2).
 */