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Parameter Curve Out-of-Range Types 529
2. IntheCurveEditorselectthetrackyouwant
to loop.
3.
Click Parameter Out-of-Range Types to
select how your animation behaves outside the
time covered by the range bar.
4. Choosethetypeofoutofrangetypeyou
want in the dialog, then close it and play the
animation. The Curve editor will display the
loop or cycle with a dotted line.
Tip: You can create k eys from the out of range
type by using the Track View Utilities > Create
Out of Range Keys.
Procedure
To use Parameter Out-of-R ange Types to create a
loop:
1.
Create a Box primitive on the left side of the
Front viewport.
2. Turn on Auto Key a nd move the tim e slider to
frame 10.
3. Move the b ox to the right side of the Front
viewport.
4. Open Track View, right-click Filters, and then
select Animated Tracks Only.
5. Choose the Position track for the box in t he
Track View Hierarchy, and then click Parameter
CurveOut-of-Rangetypes.
6. In the Parameter Curve Out-of-Range Types
dialog, select Ping Pong for both the in and out
types and then click OK.
7. Click Play in the Viewport Controls.
The box moves back and forth repeatedly.
While the animation is play ing , exper iment by
adjusting the keys in the Curve Editor, or in the
Dope Sheet.
Interfa ce
Selec t from the options for repeating your
animation and options for applying a linear value.
Co nstant—Holds the value of the end key of the
range for all frames. U se constant when you want
no animated effect before the first key of the
rangeorafterthelastkey.Constantisthedefault
out-of-range type.
Cycle—Repeats the same animation as within the
range. If the first and last keys in the range have
different values, the animation wil l show an abrupt
"jump" from the last key to the first. Use Cycle
when you want an animation to repeat, but do not
need the ends to match.
Loop—Repeats the same animation as within the
range, but interpolates between the last key and
first key in the r ange to create a smooth loop. If
the first and last key are both at the extreme ends
of the range, Loop will behave exactly like Cycle.
If you use Posit ion Ranges to extend the range
bar b eyond the keys, the added length determines
the amount of t ime used to interpolate between
the last key and the first key. Use loop w ith an
extended range bar to produce smoothly repeating
animation.
Ping Pong—Alternates between a forward and
backward repeat of the animation within the range.
Use Ping Pong when you want your animation to
alternate back and forth.