pdepoly(x,y) draws a polygon
with corner coordinates defined by
If the PDE app is not active, it is automatically started, and the
polygon is drawn in an empty geometry model.
The optional argument
label assigns a name
to the polygon (otherwise a default name is chosen).
The state of the Geometry Description matrix inside the PDE
app is updated to include the polygon. You can export the Geometry
Description matrix from the PDE app by using the Export
Geometry Description option from the Draw menu.
For a details on the format of the Geometry Description matrix, see
pdepoly([-1 0 0 1 1 -1],[0 0 1 1 -1 -1]);
creates the L-shaped membrane geometry as one polygon.