8

Boolean Compound Object 337
5.
On the Modify panel, choose Operand B f rom
the Parameters rollout > Operands list. If you
want to see operand B, choose Display/Update
rollout > Display group > Operands or Result
+ Hidden Ops.
IfyouwanttoanimatetheCylinderorthe
Cylinder’s parameters you can now access them
in the modifier stack display.
6. If you want to mo d ify the sphere’s par a meters,
choose the bo x in the Operands list.
7. Now there are two entries labeled Boolean in
the stack display. Choose the lower entry. The
Sphere is displayed in the Operands list.
8. Choose the Sphere from the Operands list. The
sphere’s parameters are available by clicking the
sphere’s name in the modifier stack display.
9. Use this technique to change parameters or
animateanyoftheoperandswithinthemultiple
Boolean.
You can also navigate multiple Booleans through
Track View. Clicking the operand in Track View
gives you direct access to its entry in the modifier
stack display. In complex objects with many
Bo oleans, this is an easier method than the one
outlined above.
Inter face
Pick Boolean rollout
When you select operand B, you designate it
as a Reference, Move (the object itself), Copy,
or Instance, according to your choice in the
Pick Boolean rollout for Boolean objects. Base
yourselectiononhowyouwanttousethescene
geometry after you create the Boolean.
Because you usually create Boolean objects f rom
overlapping objects, if the B object isn’t removed
(if you don’t use the default Move option), it often
obstr ucts your v iew of the completed Boolean.
You can move the Boolean or the B object to better
see the result.
Pick Operand B—Use this button to select the
second object to use to complete the Boolean
operation.
Ref erence/Copy/Move/Ins tance—Lets you specify
how operand B is transferred to the B oolean
object. It can be transferred either as a
reference
(page 3–1096)
,acopy,an instance (page 3–1051) ,
or mov ed.
• Use Reference to synchronize changes to
the original object with operand B, but not
vice-versa.
• Use C opy when you w ant to reuse the operand
B geometry for other purposes i n the scene.
• Use Instance to synchronize anim ation of the
Boolean object w ith animated changes to the
original B object, and vice-versa.
• Use Move (the default) if you’ve created the
operand B geometry only to create a Boolean,
andhavenootheruseforit.
Object B geometr y b ecomes part of the Boolean
object regardless of which copy method you
use.