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338 Chapter 5: Creating Geometry
Parameters rollout
Operands group
Operands list field—Displays the current operands.
Name—Edit th is field to change the name of the
operands.ChooseanoperandintheOperandslist
and it will also appear in the Name box.
Extract Operand—Extractsacopyoraninstanceof
the selected operand. Choose one of the operands
in the list window to enable this button.
Note: This button is available only in the Modify
panel. You can’t extract an operand while the
Create panel is active.
Instance/Copy—Lets you specify how t he operand
is extracted: as either an
instance (page 3–1051)
or a copy.
Operation group
Union—The Boolean object cont ains the volume
of both original objects. The intersecting or
overlapping portion of the geometry is removed.
Intersection—The Bo olean object contains only
the volume that was common to both original
objects (in other words, where they overlapped).
Subtraction (A-B)—Subtracts the intersection
volume of operand B from operand A. The
Boolean object contains the volume of operand A
w ith the intersection volume subtracted from it.
Subtraction (B-A)—Subtracts the intersection
volume of operand A from operand B. The
Boolean object contains the volume of operand B
w ith the intersection volume subtracted from it.
Cut —Cuts operand A with operand B, but doesn’t
addanythingtothemeshfromoperandB.This
works lik e the
Slice modifier (page 1–815) ,but
instead of u sing a planar gizmo, Cut uses the shape
of operand B as the cutting plane. Cut treats the
geometry of the Boolean object as volumes rather
than closed solids. Cut does not add geometry
from operand B to operand A. Operand B
intersections define cut areas for altering geometry
in operand A.
There are four t ypes of Cut:
•
Refine—Adds new vertices and edges to
operand A where operand B intersects the faces
of operand A. 3ds Max refines the resulting
geometry of operand A with additional faces
inside the intersected area of operand B. Faces
cut by t he intersection are subdiv ided into new
faces. You might use this option to refine a
boxwithtextsothatyoucanassignaseparate
material ID to the object.
•
Split—Works like Refine but also adds a second
or double set of vertices and edges along the
boundary where operand B cuts operand A.
Split produces two elements belonging to the