Defines the direction/speed at which the Timeline is expected to be played.

The absolute value of rate indicates the speed which the Timeline is to be played, while the sign of rate indicates the direction. A postive value of rate indicates forward play, a negative value indicates backward play and 0.0 to stop a running timeline.

Rate 1.0 is normal play, 2.0 is 2 time normal, -1.0 is backwards, etc...

Inverting the rate of a running Timeline will cause the Timeline to reverse direction in place and play back over the portion of the Timeline that has alreay elapsed.

Defines the Timeline's play head position.

If Timeline is running, it jumps to the specified position immediately. If it is not running, the time indicates from where the Timeline to start when next play() is called.

If user wants to bind the variable and update it simultaneously, bidirectional bind is needed.

var pos: Duration;
var t: Timeline = Timeline {
time: bind pos with inverse;
...
}

Enable/disable interpolation.

Defines the number of cycles in this animation. The repeatCount may be INDEFINITE for animations that repeat indefinitely, but must otherwise be >= 0.

Defines whether this animation reverses direction on alternating cycles. If true, the animation will proceed forward on the first cycle, then reverses on the second cycle, and so on. Otherwise, animation will loop such that each cycle proceeds forward from the initial KeyFrame.

Defines the sequence of KeyFrames in this animation. KeyFrames are expected to have time >= 0s, otherwise they will be ignored. If a KeyFrame is not provided for the time==0s instant, one will be synthesized using the target values that are current at the time #play() or #playFromStart() is called.

The maximum framerate at which this animation will run, in frames per second. This can be used, for example, to keep particularly complex Timelines from over-consuming system resources. By default, a Timeline's framerate is not explicitly limited, meaning the Timeline will run at an optimal framerate for the underlying platform.