Using Advanced 3D Features - Mastering AutoCAD for Mac - page 556

As an alternate method in step 3, after choosing Move from the Grip Edit shortcut menu, you
can turn on Ortho mode and point the cursor vertically so it shows -Z in the coordinate readout.
Then enter 30 ↵, or 76 ↵ for metric users.

Using a 3D Polyline
Now you'll draw the legs for the butterfly chair by using a 3D polyline. This is a polyline that
can be drawn in 3D space. Here are the steps:

1. Click 3D Polyline from the expanded Open Shapes tool group in the Tool Sets palette
(Figure 20.27). You can also choose Draw  3D Polyline on the menu bar, or type 3P ↵.

FIGURE 20.27
The 3D Polyline
tool in the Open
Shapes tool group

2. At the Specify start point of polyline: prompt, pick a series of points, as shown in
Figure 20.28 (top), by using the Endpoint and Midpoint osnaps. Use the Close option to
close the series of lines.

FIGURE 20.28
Using 3D polylines
to draw the legs of
the butterfly chair

3. Endpoint

Draw a polyline
in the sequence
shown to the left.
Use the Osnap
overrides indicated
in the figure.

2. Endpoint

4. Endpoint 1. Midpoint

5. Close

3. Endpoint

Repeat the process
for the other part
of the chair legs.

1. Midpoint
5. Close

4. Endpoint

2. Endpoint