Apple Motion Bedienungsanleitung PDF herunterladen (Seite 30)

128 Animating with Keyframes

5 In the timing display in the toolbar, type 5. (5 period) and then press Return (or

Enter) to move the playhead to the frame at five seconds. This is the frame where you

want the curtains to stop opening.

NOTE

If the timing display is set to frames, you can move the playhead to 5 seconds

by clicking the downward-facing arrow, and choosing Show Timecode. Then, type

5. (five period) to move the playhead to 5:00.

You don’t have to double-click in the timing display to enter a number.

As long as a value field in the Inspector isn’t active when you start typing, Motion

assumes that you want to move the playhead and will automatically enter the number

in the timing display.

6 In the Properties Inspector, drag left in the Rotation value field to about –300 degrees

as you watch the curtains open in the Canvas.

A yellow diamond appears to the right of the value field to indicate that a keyframe

for this parameter has been set at the current playhead location.

7 Play the project. The curtains animate open until 5:00, and then stop.

8 Stop playback on any frame other than 5:00 or 0:00. The yellow diamond for Rotation

is now gray. A gray diamond indicates that at least one keyframe for this parameter

exists, but not at the current playhead location.

9 Move the playhead to the start of the project. The diamond turns yellow again, indi-

cating that a keyframe exists at the playhead. But wait a minute. You only set a key-

frame at 5:00, not at 0:00. Why is there a keyframe here, too?

A single keyframe will not create animation; it locks the value of the keyframed

parameter at a point in time, but the parameter will have that same value at all other

points in time. To animate with keyframes, you need to have at least two keyframes with

different values.

When you use recording to set keyframes, Motion assumes that you want the value

to change over time, so it automatically sets a keyframe with the original value at

the beginning of the layer you are animating. Remember that recording will always

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Apple Motion Bedienungsanleitung Seite 30