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Lock Tangents 583
influence the keyframe has over the interpolation
between keyf rames.
This feature can be used to aid in the slow-in
and slow-out workflow of traditional animation.
For example, suppose you’re animating a ball
bouncingupanddownontheworld’sZaxis.On
frame1,theballisontheground;onframe8,
the ball is in the air; on fr ame 16 the ball is back
on the ground. You could adjust the tangents for
frame 8 so that their length pulls more of the curve
towards its keyframe and away from the keyframes
on f r ame 1 and 16. When rendered, the ball will be
more v isible on screen near the top of its bounce
and blurrier near the points where it touches the
ground.
Pr ocedur es
To assign a Custom tangent type:
1.
Open the Curve Editor.
2. In the Hierarchy list, highlight a track that uses
any controller that displays keys on the curve.
3. Highlight one or more keys on the curve.
4. On the Key Tangents: Track View
toolbar , click Set Tangents to Custom.
The handles are now al l Custom and available
for editing.
Tip: If a high lig hted key has Auto Tangency
set, you c an just move its handle to instantly
convert the key to Custom. For selections of
multiple keys, choose Lock Tangents, then
move any handle to convert al l the keys to
Custom tangency.
To edit the horizontal length of a B ezier handle:
1.
Assign a Custom Tangent type to the key you
want to edit on the function curve, or highlight
a key that already has one.
2. Mak e sure Show Tangents is on. The
toggle is located on the Track View toolbar.
3. Highlight the key on the function curve.
Tangent handles appear on the high lighted
keyframe.
4. Move one of the handles horizontally away
from its key.
Interfa ce
Show Ta ngents—Displays the tangents of
highlighted vertices, whereupon you can adjust
thetangentsbydraggingthehandleendpoints.
By holding down the
Shi f t key, you can edit the
tangents handles separately.
Lock Ta ngents
Track View > Curve Editor > Select keys on curves. >
Curves: Track View Toolbar > Lock Tangents
Lock Tangents lets you manipulate handles of
multiple vertices simult aneously. When Lock
Tangents is active, dragging a tangent handle
affects the handles of all highlighted keys. When
Lock Tangents is inactive, dragging a tangent
handle affects only that handle’s key.
Procedure
To dr ag dis continuous ta ngent handl es:
1.
Highlight one or more keys in the Curve Editor.
Hold down the
Ctrl key to add to the selection
set.
2. ClickLockTangentstosetoneofthe
following modes:
• Off: Drag ging a tangent handle affects only
the single key displaying the hand le.