import type { GameFrameContext } from './loop.js';
export interface LevelFrameState {
    readonly frameNumber: number;
    readonly timeSeconds: number;
    readonly previousTimeSeconds: number;
    readonly deltaSeconds: number;
}
export declare class LevelClock {
    private state;
    start(startTimeMs: number): void;
    tick(context: GameFrameContext): LevelFrameState;
    get current(): LevelFrameState;
    snapshot(): LevelFrameState;
    restore(state: LevelFrameState): void;
}
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