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Spline Editor Overview
The Spline Editor is the main area where animation is manipulated and refined. You primarily use the
Spline Editor to show the changing values of parameters over time in the form of splines. Whereas
Keyframes explicitly set the value of a parameter on a given frame, Splines are lines or curves that
interpolate the values between keyframes. Once you set a keyframe on a parameter, a spline is
created and can be displayed in the Spline Editor so you can make further refinements to the
animation. However, the Spline Editor is more advanced than a standard curve editor since it can also
display functions, which may not be splines, like changing characters within a text string or
mathematical expressions that drive your animations.
The Spline Editor with three animated parameters
What Are Splines?
All animation uses splines that describe the value of a parameter at any given point in time. The Spline
Editor graph shows the time of the comp along the horizontal axis and the value of the parameter
along the vertical axis.
The advantage of using splines to represent animation instead of keyframes as in the Keyframes Editor
is that splines allow you to manipulate the interpolation between keyframes. For example, if a
keyframe is set at a value of 1.0 on a parameter for frame 1, followed by a keyframe value of 10.0 for
frame 10, the values between keyframes are smoothly interpolated or calculated based on the shape
of the spline. Using the functions and controls in the Spline Editor, you have a fantastic amount of
control over that interpolation.
Spline Editor Interface
The Spline Editor is not visible by default, but you can show it at any time by clicking the Spline button
in the user interface toolbar. You can also display the Spline Editor by right-clicking on a node in
the Node Editor or a segment in the Keyframes Editor and choosing Edit Splines from the
drop-down menu.
The Spline Editor can be open alongside the Node Editor or Keyframes Editor, or displayed separately
in order to take up the entire work area.
The Graph, Header, and Toolbar
The Spline Editor has three main working areas: the graph, header, and toolbar. On the left side of the
Spline Editor is the header, which shows a list of animated parameters. The majority of the panel is
Chapter 70Animating in Fusion’s Spline Editor 1220
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