polyline is a connected sequence of segments created as a single
object. You can create straight line segments, arc segments, or
a combination of the two.
Polylines are ideal for applications including
- Contour lines for topographic, isobaric,
and other scientific applications
- Wiring diagrams and printed cicuit board
- Process and piping diagrams
- Extrusion profiles
and extrusion paths for 3D solid modeling
Polylines can be created
with several commands including PLINE, RECTANG, POLYGON, DONUT, BOUNDARY, and REVCLOUD. All of these
commands result in a LWPOLYLINE (lightweight polyline) object type.
With the 3DPOLY command, you
can create non-planar polylines that result in a POLYLINE object
type. Fewer options are available with 3D polylines.
After you create a polyline,
you can edit it using grips or PEDIT. You can use EXPLODE to convert
polylines to individual line and arc segments.
You can convert a
spline-fit polyline created with PEDIT into a true spline object
Create Wide Polylines
You can draw polylines of various
widths by using the Width and Halfwidth options. You can set the
width of individual segments and make them taper gradually from
one width to another. These options become available after you specify
a starting point for the polyline.
The Width and Halfwidth options set the width
of the next polyline segments you draw. Widths greater than zero
produce wide lines, which are filled if Fill mode is on and outlined
if Fill mode is off.
Intersections of adjacent wide segments are
usually beveled. However, nontangent arc segments, acute angles,
or segments that use a dash-dot linetype are not beveled.
Create Polylines from the
Boundaries of Objects
can create a polyline from the boundaries of objects that form a
closed area with BOUNDARY. A polyline
created using this method is a separate object, distinct from the
objects used to create it.
To expedite the boundary selection process
in large or complex drawings, you can specify a group of boundary
candidates, called a boundary set. You create this set by selecting
the objects you want to use define the boundary.
To draw a polyline with
To draw a line and arc
To create a wide polyline
To create a boundary polyline