@pixi/3d
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    Class TrackAdvanced

    Keyframes for one animated property

    The glTF loader builds tracks for you. Build them yourself to author an animation in code, and pass them to AnimationOptions#tracks. Use Track itself for numeric arrays such as morph-target weights, and NumberTrack, Vector3Track or QuaternionTrack for numbers, vectors and rotations.

    const weights = new Track({
      label: 'Face.weights',
      times: [0, 1],
      values: [0, 0, 1, 0.5],
      valueSize: 2,
    });

    Hierarchy (View Summary)

    Index
    constructor
    interpolation label times values valueSize
    blendInto evaluate
    interpolation: InterpolationMode

    Interpolation algorithm used between keyframes

    label: string

    The property this track drives; TrackOptions#label has the format

    times: Float32Array

    Keyframe times in seconds

    values: Float32Array

    Keyframe values; TrackOptions#values has the layout

    valueSize: number = 0

    Number of numeric components in each sampled value

    • Blends a freshly sampled value into a running weighted average

      The player calls it every frame while two or more playing states drive the same property. Override it where a component-wise lerp is wrong for the value, as QuaternionTrack does.

      Parameters

      • values: Float32Array

        The running weighted average, updated in place

      • sample: Float32Array

        The freshly evaluated value to blend in

      • t: number

        Blend factor for sample against values

      Returns void

    • Samples the track at a time, holding the first or last keyframe outside their range

      Parameters

      • time: number

        Time in seconds

      • index: number

        Keyframe index this returned last time, which shortens the search; 0 always works

      • target: Float32Array<ArrayBufferLike> | number[]

        Receives valueSize numbers

      Returns number

      The keyframe index to pass back as index next time

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