Additional editing operations are available for
changing the shape of polyline objects. You can also join separate
You can edit
polylines by closing and opening them and by moving, adding, or
deleting individual vertices. You can straighten the polyline
between any two vertices and toggle the linetype so that a dash
appears before and after each vertex. You can set a uniform width
for the entire polyline or control the width of each segment. You
can also create a linear approximation of a spline from a
You can join a
line, an arc, or another polyline to an open polyline if their ends
connect or are close to each other. If the ends are not coincident
but are within a distance that you can set, called the fuzz distance, the ends are joined by either trimming
them, extending them, or connecting them with a new segment.
of Modified Polylines
properties of several objects being joined into a polyline differ,
the resulting polyline inherits the properties of the first object
that you selected. If two lines meet a polyline in a Y shape, one
of the lines is selected and joined to the polyline. Joining also
causes an implicit decurve, with the program discarding the spline
information of the original polyline and any polylines being joined
to it. Once the joining is completed, you can fit a new spline to
the resulting polyline.
Editing Options for Polylines
In addition to
the general editing operations available for most objects, there
are additional options available for editing and joining polylines
Close. Creates the closing segment of
the polyline, connecting the last segment with the first. The
polyline is considered open unless you close it using the Close
Join. Adds lines, arcs, or polylines to
the end of an open polyline and removes the curve fitting from a
curve-fit polyline. For an object to join the polyline, their
endpoints must touch.
Width. Specifies a new uniform width
for the entire polyline. Use the Width option of the Edit Vertex
option to change the starting and ending widths of segments.
Edit Vertex. Marks the first vertex of
the polyline by drawing an X on the screen. If you have specified a
tangent direction for this vertex, an arrow is also drawn in that
Fit. Creates a smooth curve consisting
of arcs joining each pair of vertices. The curve passes through all
vertices of the polyline and uses any tangent direction you
Spline. Uses the vertices of the
selected polyline as the control points, or frame, of a spline-fit
polyline. The curve passes through the first and last control
points unless the original polyline was closed.
Decurve. Removes extra vertices
inserted by an arc-fit or spline-fit polyline and straightens all
segments of the polyline.
Ltype Gen. Generates the linetype in a
continuous pattern through the vertices of the polyline. When this
option is turned off, the linetype is generated starting and ending
with a dash at each vertex.