import type { FixedStepContext } from '@quake2ts/engine';
export interface GameFrameContext extends FixedStepContext {
    readonly timeMs: number;
    readonly previousTimeMs: number;
    readonly deltaSeconds: number;
}
export type GameFrameStageName = 'prep' | 'simulate' | 'finish';
export type GameFrameStage = (context: GameFrameContext) => void;
export interface GameFrameStages {
    prep?(context: GameFrameContext): void;
    simulate?(context: GameFrameContext): void;
    finish?(context: GameFrameContext): void;
}
export declare class GameFrameLoop {
    private timeMs;
    private frame;
    private readonly stageHandlers;
    private readonly stageCounts;
    private readonly stageCompactionNeeded;
    constructor(initialStages?: GameFrameStages);
    addStage(stage: GameFrameStageName, handler: GameFrameStage): () => void;
    reset(startTimeMs: number): void;
    advance(step: FixedStepContext): GameFrameContext;
    private runStage;
    private compactStageHandlers;
    get time(): number;
    get frameNumber(): number;
}
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