218
AutoCAD and Its Applications—Advanced
NOTTE OT
Once the
SLICE
command has been used, the history of the solid to
that point is removed. If a history of the work is important, then save
a copy of the file or place a copy of the object on a frozen layer prior to fi
performing the slice.
Planar Object
A second method to create a slice through a 3D solid is to use an existing planar
object. Planar objects include circles, arcs, ellipses, 2D polylines, and 2D splines. See
Figure 8-24A. The plane on which the planar object lies must intersect the object to be
sliced. The current UCS has no effect on this option.
Be sure that the planar object has been moved to the location of the slice. Then,
select the
SLICE
command, pick the object to slice, and press [Enter]. Next, enter the
Planar Object
option and select the slicing path object (the circle, in this case). Finally,
specify which side is to be retained. See Figure 8-24B. Again, if both sides are kept,
they are separate objects and can be individually manipulated.
Surface
A surface object can be used as the slicing path. The surface can be planar or
nonplanar (curved). Surface modeling is discussed in detail in Chapter 10. Using a
surface as a slicing path is a technique that you can use to quickly create a mating die.
For example, refer to Figure 8-25. First, draw the required surface. The surface should
Figure 8-24.
Slicing a solid with
a planar object.
A—The circle is
drawn at the proper
orientation and in
the correct location.
B—The completed
slice.
A
B