import { Track } from "../Track.ts";
/** Keyframe track for quaternion rotation values - uses spherical linear interpolation (slerp). */
export declare class QuaternionTrack extends Track {
    constructor(name: string, times: Float32Array | number[], values: Float32Array | number[]);
    /** Slerp between quaternion keyframes at index and index+1. */
    interpolate(index: number, t0: number, t: number, t1: number): number[];
}
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