Interface MixerPlayOptions

The node whose §42 authority gates this playback's transform writes.

Inferred when the target is a Node. A mixer aimed at something else — a material, a bare Transform, a plain object — cannot infer it (math and material objects carry no back-reference to a node), so declare it here if the clip writes into a node's transform through that target.

Number of total iterations: 1 (the default) plays the clip once, 3 plays it three times, Infinity never ends. The same counting as Timeline.loop, deliberately not Tween.repeat's "additional cycles".

Called for every clip event this playback crosses (§16 semantics).

Whether AnimationMixer.seek also fires the events it crosses forwards — §16's opt-in replay-on-seek policy.

§16 words it per marker; a clip's AnimationEvent is plain authored data with no policy field (see ./clip.js), so the opt-in lives on the playback that owns the marker history instead. A caller who needs per-marker granularity filters inside MixerPlayOptions.onEvent, which receives the event and its index.

Defaults to false: seeking is silent, and a backward seek fires nothing either way (crossing is a forward notion, §16).

Extracts translation from one designated track and moves a node with it instead of writing it (§19, plan P7-5). See MixerRootMotionOptions for the semantics, the loop-aware derivation, and what is staged.

Validated at AnimationMixer.play, where the clip's tracks are known.

Multiplier applied to every advance delta; finite and > 0. Default 1.