8

816 Chapter 8: Modifiers
Top: Original object
Middle: Object without top
Bottom: Object without bottom, respectively
Multiple Slices
To create multiple slices in an object you need to
apply multiple Slice modifiers. If the geometry
doesn’t need to remain parametric, you can
collapse it into an editable mesh and use the Slice
tool available under
Editable Mesh (Edge) (page
1–997)
.Thistooliseasiertousewhenyouneedto
make multiple slices in an object, but it does not
stay parametric.
War ning: Slice and Sub-Object
Selections
You can use Slice on sub-object selection sets
by slicing or removing only the selected faces.
However, b ecause selected faces are sliced and
unselected adjacent faces are not, there may be
"holes"inthemeshontheedgewheretheslice
occurs. These holes can be problematic, creating
discontinuities in smoothing and rendering. Holes
are created only when Oper ate On Faces is on.
Procedure
Example: To animate the appearance of a teapot
using the Slice modifier:
1.
Create a teapot (page 1–178) primitive. Set the
view port to wireframe.
2. Apply a Slice modifier.
TheSlicePlanegizmoappearsatthebaseofthe
teapot.
3. On the stack display, choose the Slice Plane
gizmo.
4. Tu rn on t he Auto Key button, and move the
time slider to frame 100.
5. MovetheSlicePlanegizmoabovethetopofthe
teapot. Play the animation to verify that the
slice plane is animated.
6. Change the Slice type from Refine Mesh (the
default) to Remove Top. Play the animation
again.
7. Makeacopyoftheteapotinthesameposition
(choose Edit menu > Clone and click OK to
accept the default settings).
8. PutaWireframematerialonthecloneand
change the Slice type on the clone to Remove
Bottom.
9. Pla y the animation.
The wireframe teapot magically becomes a ful ly
shaded one.