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582 Chapter 12: Animation
If the hig hlighted curve is part of a multicurve
controller, vertices are added to each curve
at the time location where you clicked. For
example, if you are using a Bezier Position
controller , adding a key to the red X curve of a
Position track simultaneously adds keys to the
greenYcurveandtheblueZcurve.
Dr aw Cur v es
TrackView>CurveEditor>Keys:TrackViewtoolbar>
Draw Curves button
Use this tool to draw new curves, or revise exist ing
ones by sketching d irectly on the funct ion curve in
the Curve Editor Key window.
The speed with which you draw determines how
many keys are added to the curve. If there are too
many keys, use Reduce Keys to make fewer keys
on the curve.
Procedure
To draw a curve:
1.
On the Curve Editor toolbar, click Draw
Curves.
2. Select the t ra
ck of the curve you want to draw
on.
3. Move your cursor onto the curve and draw.
If there are too many points after drawing
cur ves, delete or reduce (page 2–572) keys.
Show Tangents
T rack View > Curve Editor > Curves: T rack View Toolbar >
Show Tangents button
Show Tangents lets you view adjust the tangents of
highlighted vertices in Curve Editor.
Custom Tange nt
You can assign the Custom Tangent t ype to any
controller that displays keys on a curve. Highlight
the key on the curve and then click the Set Tangents
To Custom icon on the Key Tangents: Track View
toolbartodisplaythehandlecontrols.
The tangent handles can be either continuous or
discontinuous. To make a handle discontinuous,
hold down the
Shif t key when you move it.
• Con tinuous handles behave like a single lever
with its pivot point at the key location. Moving
either end of the handle also moves the opposite
end, maintaining the continuit y of the t angent.
Thefunctioncurve,andtheanimationit
represents, moves smoothly through a key with
continuo us tangent handles.
• Discontinuous handles behave like leaves on a
hinge, with the hinge pin at the key loc ation.
Each end moves independently of the other.
To convert a discontinuous tangent to a continuous
tangent, change the tangent type from Custom
to Smooth and then back to Custom again. This
techniqueisperformedatthekeylevelandcan
affect unselected vertices if they b elong to the same
key as one of the selected vertices.
Horizontal B ezier Handle Control
When using the Custom Tangent type, a tangent
handle can be moved horizontally in length
away from its keyframe to affect the shape of
the function curve. This affects the amount of