316
AutoCAD and Its Applications—Basics
Copyright Goodheart-Willcox Co., Inc.
Joining Different Object Types
You can join lines and arcs to polylines, or join lines, arcs, and polylines to splines.
Access the
JOIN
command and select the objects to join. Apply the rules of joining
objects of the same type to joining a combination of objects. However, segments cannot
overlap or have gaps. The fi nal object becomes the most complex of the original objects.
Trimming Trimming
Use the
TRIM
command to cut lines, polylines, circles, arcs, ellipses, splines, xlines,
and rays that extend beyond an intersection. Access the
TRIM
command, pick as many
cutting edges as necessary, and then press [Enter]. Then pick the objects to trim to the cutting
edges. Preview the operation before trimming. To exit, press [Enter]. See Figure 11-16.
Automatic windowing is often a quick and effective method for trimming multiple
objects. The
TRIM
command also offers
Crossing
and
Fence
options that provide stan-
dard crossing and fence selections. Figure 11-17 shows using the
Crossing
option to trim
multiple objects. Figure 11-18 shows using the
Fence
option to trim multiple objects.
TRIM
Ribbon
Home
Modify
Trim
Type
TRIM
TR
cutting edge: An
object such as a
line, arc, or text that
defines the point
(edge) at which the
object you trim will
be cut.
Figure 11-16.
Using the
TRIM
command. Note the
cutting edges.
Select first
cutting edge
Select to trim
this line using the
first cutting edge
Select to trim this
line using the second
cutting edge
Select second
cutting edge
Step 1 Step 2 Result
Figure 11-17.
The only objects
trimmed with the
Crossing
option are
those that cross the
edges of the crossing
window. Automatic
windowing
accomplishes the
same task.
Process Result
Selected cutting edge (rectangle)
Crossing box
Figure 11-18.
The
Fence
option allows you to select around objects. In this example, the cutting edge
consists of a rectangle drawn using the
RECTANGLE
command.
Step 1 Step 2 Result
Cutting edge
(rectangle)
First pick
point
Fourth pick
point
Second pick
point
Third pick
point Fence line