8

Sweep Modifier 847
Note:
When none of the Pivot Alignment buttons
is depressed the pivot point of the section is used
as the alignment point.
Align Pivot—When turned on, a 3D representation
of the Pivot Alignment grid appears in the
viewport. You only see the 3x3 alignment grid,
the se ction and the underlying spline path. Once
you’re satisfied with the alig nment, turn off the
Align Pivot button or right-click to see the sweep.
Align Pivot grid showing control points (in orange)
superimposed over a duplicate sweep.
Bank ing—When on, sections rotate about the
spline path whenever the path bends and changes
height in the path’s local Z axis. Banking is ig nored
ifthesplinepathis2D.Whenoff,shapesdonot
rotateabouttheirZaxisastheytraversea3Dpath.
Default=on.
Union I ntersections—If working with multiple
intersecting splines, like a grid, turn this switch
on to produce cleaner intersections with fewer
artifacts.
Note: Union Int ersections takes additional time to
compute the intersections, so lea ve this switch off if
you don’t have intersecting splines. Furthermore,
this setting wi l l only calculate intersections of
separate splines cont ained in one shape object.
So a figure X (separate, intersecting splines) will
be properly intersected, but a figure 8 (a single,
self-intersecting spline) will not.
Gen. M apping Coords—Applies mapping
coordinates to the extruded object. Default=off.
Real-World Ma p Size—Controls the scaling method
used for texture mapped materials that are applied
totheobject. Thescalingvaluesarecontrolled
by the Use Real-World Scale settings found in
the applied material’s
Coordinates rollout (page
2–1434)
.Default=on.
Genera te M apping IDs—Assigns different material
IDstothesidesandthecapsofthesweep.
Specifically, if both Use Section IDs and Use Path
IDs are both turned off the sides receive ID 3, the
front cap receives ID 1, and the rear cap receives
ID 2. Default=on.
Use Sect io n I D s—Uses the material ID values
assigned to seg ments of the section that is swept
along the underlying
spline (p age 1–261) or
NURBS (page 1–1079) cur ve. Default=on.
By applying an
Edit Spline modifier (page 1–671)
to a Custom Section, different material IDs can
be assig ned to each segment that makes up the
section.
Note: Built-in sections do not benefit from the Use
Section IDs switch.
Use Pat h I Ds—Uses the material ID values assigned
to segments of the underlying spline or curve
sub-objects in the underlying curve.
By applying an Edit Spline modifier to the
underlying spline, each segment can b e assigned
its own material ID .
Note: Use Section IDs and Use Path IDs does not
control the material IDs of the front and rear caps
of the sweep.