2011

Toolbar: Drafting tool set ➤ Closed Shapes tool group (expanded) ➤
Region
Menu: Draw ➤ Region
Summary
Regions are two-dimensional areas you create from closed shapes or loops.
Closed polylines, lines, and curves are valid selections. Curves include circular
arcs, circles, elliptical arcs, ellipses, and splines.
You can combine several regions into a single, complex region.
Closed 2D and exploded planar 3D polylines in the selection set are converted
to separate regions and then converts polylines, lines, and curves to form
closed planar loops (outer boundaries and holes of a region). If more than two
curves share an endpoint, the resulting region might be arbitrary.
The boundary of the region consists of end-connected curves where each point
shares only two edges. All intersections and self-intersecting curves are rejected.
If a selected polyline has been smoothed by either the Spline or Fit option of
PEDIT, the resulting region contains the line or arc geometry of the smoothed
polyline. The polyline is not converted to a spline object.
REGION deletes the original objects after converting them to regions unless
the system variable DELOBJ is set to 0. If the original objects were hatched,
hatch associativity is lost. To restore associativity, rehatch the region.
872 | Chapter 18 R Commands