Graphics Programs Reference
In-Depth Information
U S I N G T H E E X T R U D E T O O L
Start with the Extrude tool on two basic shapes:
1. Open the Surfaces1.dwg file, which can be obtained at www.sybex.com/go/
masteringautocadmac. Note that the visual style shown on the Viewport Controls
is set to 2D Wireframe.
2. Choose Extrude from the Surfaces - Create tool group on the Tool Sets palette.
3. At the Select objects to extrude or [MOde]: prompt, type MO SU ↵. This will
create an extruded surface.
3. Click the circle in the drawing, and then press ↵. A surface appears and its length
changes as you move the cursor.
4. Adjust the surface height to 5 units so it looks similar to Figure 23.39.
5. Click Extrude again and extrude the arc horizontally 5 units so it looks similar to the
extrusion in Figure 23.39.
FIGURE 23.39
Extrude the
circle and arc (left
image) 5 units to
look like the image
on the right.
U S I N G T H E S U R F A C E T R I M A N D S U R F A C E U N T R I M T O O L S
The Surface Trim tool is similar to the 2D Trim tool except there is the additional step at the
beginning where you have to select the object you intend to trim. Let's try it:
1. Click Surface Trim from the Surfaces - Edit tool group on the Tool Sets palette.
2. Click both the cylinder and the extruded arc surface, and then press ↵. This fi rst step
selects the objects to trim.
3. Click both objects again and then press ↵. This time you're selecting the objects to trim to.
You want to trim the top of the cylinder to the arc and the arc to the cylinder.
4. Finally, click the cylinder near the top edge to indicate what part you want to trim. Also
click the extruded arc surface anywhere outside of the cylinder. Your surfaces should
look like the right image in Figure 23.40.
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