Chapter 8 Creating and Working with Solid Model Features
191
An example of showing the history on a composite solid is provided in Figure 8-3.
In Figure 8-3A, the model appears in its current edited format. The
History
property
setting was initially set to
Record
before performing two Boolean subtraction opera-
tions. The
Show History
property is currently set to
No
and the
Conceptual
visual style
is set current. In Figure 8-3B, the
Show History
property is set to Yes. Isolines have
also been turned on. You can see the geometry that was used in the Boolean subtrac-
tion operations. Using subobject editing techniques, the individual geometry can be
selected and edited. In Figure 8-3C, the sphere (the subtracted object) is selected while
pressing the
[Ctrl]
key. Selecting the sphere in this manner selects the solid primitive
subobject and displays a grip tool for editing the subobject. Using grip tools for editing
3D objects is introduced later in this chapter. Subobject editing is discussed in detail
in Chapter 11.
Selection Cycling Selection Cycling
When selecting objects that are on top of each other or occupy the same space,
selection cycling is the preferred method to select one of the objects. When editing, g
you may need to erase, move, or copy one of the objects that overlap in order to select
the correct object. The
[Shift]
key and space bar can be pressed at the same time to cycle
through objects at a pick point. When you need to cycle through objects:
1. At the “select objects” prompt, hold down the
[Shift]
key and space bar, then click
to select the object you want.
2. Keep clicking until the object you want to select is highlighted.
3. Press the
[Enter]
key.
PROFESSIONAL O TIP T P PRO RO F FE S S I O NA NA AL T TI P
If the
Show History
property is set to
Yes
to display the components of
the composite solid, as seen in Figure 8-3, the components will appear
when the drawing is plotted. Be sure to set the
Show History
property
to
No
before you print or plot.
Figure 8-2.
The
Solid History
button, located in the
y Primitive
panel of the
e Solid
tab on the ribbon, is used to
control the
SOLIDHIST
system variable setting. This button has a white background when the
T
SOLIDHIST
system variable is set to 0 (the default value). If picked, the button has a blue background.
T
Picking the
button sets
the value of
the
SOLIDHIST
system variable