\r
<h3><a name="quadrangle preference">Quadrangle Preference</a></h3>\r
\r
-<p>This algorithm can be used only together with Quadrangle (Mapping) algorithm. \r
+<p>This hypothesis can be used only together with Quadrangle (Mapping) algorithm. \r
It allows to build quadrangular meshes even if the number of nodes at \r
the opposite edges of a meshed face is not equal, otherwise this mesh \r
- will contain some triangular elements.</p>\r
+ will contain some triangular elements.\r
+<br>This hypothesis has one restriction on its work: the total quantity of\r
+ segments on all four sides of the face must be even (divisible by 2).</p>\r
\r
<p> </p>\r
\r