# Radial Quadrangle 1D-2DΒΆ

This algorithm applies to the meshing of 2D shapes under the following conditions: the face must be a full ellipse or a part of ellipse (i.e. the number of edges is less or equal to 3 and one of them is an ellipse curve). The resulting mesh consists of triangles (near the center point) and quadrangles.

This algorithm is optionally parametrized by the hypothesis indicating the number of mesh layers along the radius. The distribution of layers can be set with any 1D Hypothesis. If the face boundary includes radial edges, this distribution is applied to the longest radial edge. If the face boundary does not include radial edges, this distribution is applied to the longest virtual radial edge. The distribution is applied to the longest radial edge starting from its end lying on the elliptic curve.

If no own hypothesis of the algorithm is assigned, any local or global hypothesis is used by the algorithm to discretize edges.

If no 1D hypothesis is assigned to an edge, Default Number of Segments preferences parameter is used to discretize the edge.

**Radial Quadrangle 2D mesh on the top and the bottom faces of a cylinder**

**Radial Quadrangle 2D mesh on a part of circle**

**See also** a sample TUI Script.