export interface Vec3 {
    x: number;
    y: number;
    z: number;
}
export interface PositionSample extends Vec3 {
    t: number;
}
export interface PositionHistoryConfig {
    historyMs: number;
    maxSamples?: number;
}
/** @internal */
export declare class PositionHistory {
    private readonly historyMs;
    private readonly maxSamples;
    private readonly tracks;
    constructor(config: PositionHistoryConfig);
    record(entityId: string, t: number, position: Vec3): void;
    private trim;
    entities(): string[];
    samples(entityId: string): readonly PositionSample[];
    sampleAt(entityId: string, t: number): Vec3 | null;
    prune(now: number): void;
    forget(entityId: string): void;
}
/** @internal */
export declare function createPositionHistory(config: PositionHistoryConfig): PositionHistory;
/** @internal */
export declare function rewindTimestamp(nowMs: number, rttMs: number, interpDelayMs: number): number;
export interface HitscanRay {
    origin: Vec3;
    direction: Vec3;
    maxDistance?: number;
}
export interface HitscanTarget {
    entityId: string;
    radius: number;
}
export interface HitscanHit {
    entityId: string;
    distance: number;
    point: Vec3;
}
/** @internal */
export declare function raySphereDistance(ray: HitscanRay, center: Vec3, radius: number): number | null;
/** @internal */
export declare function resolveHitscan(history: PositionHistory, targets: readonly HitscanTarget[], ray: HitscanRay, atMs: number): HitscanHit | null;