Apple Shake 4 - Manual (Page 293)

Chapter 10 Parameter Animation and the Curve Editor 293
Rules for Keyframing
How keyframes are created and modified depends on two things—the current state of
the Autokey buttons, and whether or not there’s already a keyframe for that parameter
in the Time Bar or Curve Editor at the current position of the playhead.
When animating any parameter, the following rules apply:
• When the Autokey button is off and you adjust a parameter that has no keyframes,
you can freely adjust it at any frame, and all adjustments are applied to the entire
duration of that node.
• When you adjust a parameter that has at least one keyframe already applied, you
must turn on the Autokey button before you can make further adjustments that add
more keyframes.
• If the Autokey button is off, you cannot adjust a parameter at a frame that doesn’t
already have a keyframe. If you try to do so, the change you make to the parameter
doesn’t stick, and that parameter goes back to its original value when you move the
playhead to another frame.
Note: If you’ve made a change that you want to keep, turn on the Autokey button
before you move the playhead to add a keyframe at that frame.
Adding Blank and Duplicate Keyframes to Pause Animation
If you want a parameter to be still for a period of time before it begins to animate,
insert a pair of identical keyframes at the start and end frame of the pause you want to
create.
If you want to delay an animated effect for several frames beyond the first frame, insert
a keyframe with no animated changes at the frame where you want the animation to
begin, then modify the shape at the keyframe where you want the animation to end.
To manually add a keyframe without modifying the parameter:
m Turn the Autokey button off and on again.
A keyframe is created for the current parameter. If the parameter is already animated,
the state of the parameter at the position of the playhead in the Time Bar will be stored
in the new keyframe.
Start of animation Identical keyframes
pausing animation End of animation
Start of
animation End of
animation