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Locked and Unlocked Controls Points
When animating the Center X/Y or Pivot X/Y parameters on any tool, you create a displacement spline
in the Spline Editor. The displacement spline represents the relative offset position of the animated
object along its path. Since the displacement spline is relative, keyframes use a value between 0.0
and 1.0. A displacement value of 0.0 in the Spline Editor indicates that the object is at the very
beginning of a path. A value of 1.0 indicates that the object is positioned at the end of the path.
The displacement spline represents the relative position along a motion path
Displacement paths are composed of locked and unlocked points. Whether a point is locked is
determined by how you added it to the polyline. Locked points on the spline have an associated point
in the viewer’s motion path; unlocked points do not have a corresponding point in the viewer’s motion
path. Each has a distinct behavior, as described below.
TIP: You can convert displacement splines to X and Y coordinates by right-clicking over the
motion path in the viewer and choosing Path#: Polyline > Convert to X/Y Path.
Locked Points
Locked points are the motion path equivalents of keyframes. They are created by moving the
playhead position and changing the parameter value. These points indicate that the animated object
must be in a specified position on a specified frame. Since these keyframes are only related to
position along the path, they can only be moved horizontally along the spline’s time axis.
The locked points appear as larger-sized lock icons in the Spline Editor. Each locked key has an
associated point on the motion path in the viewer.
Deleting a locked point changes the overall timing of the motion.
Unlocked Points
Unlocked points are created by clicking directly on the spline in the Spline Editor. These points give
additional control over the acceleration along the motion path without adjusting the path itself.
Conversely, you can add unlocked points in the viewer to control the shape of the motion path without
changing the timing.
You can change an unlocked point into a locked point, and vice versa, by selecting the point(s),
right-clicking, and choosing Lock Point from the contextual menu.
For more information on motion paths and locked keyframes, see Chapters 70 and 72 in the
DaVinci Resolve manual or Chapters 9 and 11 in the Fusion Studio manual.
Chapter 70Animating in Fusion’s Spline Editor 1230
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