8

Limit Controller 321
In this example, the teapot position was
animated on the X axis between extents of
about -45 to 40, and on the Y axis between
extents of about -80 and 54.
2. Assign the Float Limit controller to a track. In
this example, we’ll assign it to the X Position
track.
This opens t he Float Limit Controller dialog,
where you can set limits and other values, but
you mig ht find it easier to do this interactively,
so for now just accept the defaults by closing
the dialog.
The track retains its original name (X Position,
in this example), but the icon has changed to
indicate that it’s now a Limit controller, and is
expandable (see i llustration in following step).
3. Expand the track.
The hierarchy contains a child track, named
LimitedController,andanew,expandable
child branch named Limits.
4. Click the X Position track and then the Limited
Controller track to compare them.
Bec ause the original X-axis movement falls
w ithin the default limits, the two tracks are
identical.
5. Scrub the animation until the X-axis position is
where you want to set a limit. In this example,
the position is about -20, where we’ll set a lower
limit.
6. Highlight the X Position track, and then
right-click and from the right-click menu
chooseLimitController>SetLowerLimit.
Thegraphcurveisnowclippedbelowthelower
limit. When you scrub the animation, the
object doesn’t move beyond that position.