import { Rotor4Track, VecN } from '@holotope/core';
import { KinematicBody4 } from './kinematic-body4.js';
/** Authored R4 translation sampled on the physics clock. */
export type PositionSampler4 = (time: number) => VecN | ArrayLike<number>;
export interface KinematicTrackDriver4Options {
    readonly positionAt: PositionSampler4;
    readonly rotationTrack: Rotor4Track;
    /** Physical duration and animation-clock spacing of every segment. */
    readonly fixedStep: number;
    /** Animation-clock time at the first segment boundary. Defaults to zero. */
    readonly startTime?: number;
}
/**
 * Converts authored position and SO(4) tracks into fixed physical trajectory
 * segments without coupling animation sampling to a renderer or CCD event loop.
 *
 * Every accepted clock boundary is sampled once. The cached end pose of one
 * segment becomes the start pose of the next, while `KinematicBody4` supplies
 * the immutable suffix plans consumed by continuous collision detection.
 */
export declare class KinematicTrackDriver4 {
    readonly body: KinematicBody4;
    readonly fixedStep: number;
    private readonly positionAt;
    private readonly rotationTrack;
    private boundaryPose;
    private startClock;
    private endClock;
    private index;
    constructor(options: KinematicTrackDriver4Options);
    get segmentIndex(): number;
    get segmentStartTime(): number;
    get segmentEndTime(): number;
    /**
     * Installs the next fixed-clock segment after the current one is exhausted.
     * Sampling and trajectory construction complete before any public state is
     * changed, so malformed authored data cannot partially advance the driver.
     */
    advanceSegment(): this;
    private samplePose;
}
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