9

1-Rail Sweep Surface 1207
as they travel along the rail. In other words, the
crosssectionsbanklikeacarfollowingaroad,ora
camera following a path constraint (page 2–398).
Default=off.
Whenyoueditthesurface,youcancontrolthe
angle of banking. The up-vector is displayed
as a yellow gizmo (similar to the gizmo that
lathe surfaces (page 1–1190) useforthecenter
of rotation). To change the up-vector angle, use
Rotate (page 1–439) to change the g izmo’s angle.
Display While Creating—When on, the sweep
surface is displayed wh i le you create it. When
off,thesweepcanbecreatedmorequickly.
Default=off.
Flip Normals—Reverses the direction of the sweep’s
normals.
1-Rail Sweep Surface rollout (modification time )
Rail Curve—Shows the name of the curve you chose
to be the rail.
Replace R ail—Lets you replace the rail curve. Click
this button, then in a v iewport click the curve to
use as the new rail.
Section Curves—Thislistshowsthenamesofthe
cross-section curves, in the order you click them.
You can select a curve by clicking its name in t he
list. Viewports display the selected curve in blue.
Arr ow B uttons—Usethesetochangetheorderof
section curves in the list. Select a curve in the list,
and then use the arrows to move the selection up
or down.