/**
 * DayNightCycle.ts
 *
 * Time of day simulation: sun/moon position, ambient lighting,
 * time scale control, and time-based events.
 *
 * @module environment
 */
export type TimeOfDay = 'dawn' | 'morning' | 'noon' | 'afternoon' | 'dusk' | 'evening' | 'night' | 'midnight';
export interface DayNightState {
    time: number;
    sunAngle: number;
    moonAngle: number;
    sunIntensity: number;
    moonIntensity: number;
    ambientColor: {
        r: number;
        g: number;
        b: number;
    };
    ambientIntensity: number;
    period: TimeOfDay;
    dayCount: number;
}
export declare class DayNightCycle {
    private time;
    private timeScale;
    private dayCount;
    private paused;
    private listeners;
    private lastPeriod;
    setTime(hours: number): void;
    setTimeScale(scale: number): void;
    getTimeScale(): number;
    pause(): void;
    resume(): void;
    isPaused(): boolean;
    update(dt: number): void;
    getSunAngle(): number;
    getMoonAngle(): number;
    getSunIntensity(): number;
    getMoonIntensity(): number;
    getAmbientColor(): {
        r: number;
        g: number;
        b: number;
    };
    getPeriod(): TimeOfDay;
    onPeriodChange(listener: (period: TimeOfDay, state: DayNightState) => void): void;
    getTime(): number;
    getDayCount(): number;
    getState(): DayNightState;
    getFormattedTime(): string;
}
//# sourceMappingURL=DayNightCycle.d.ts.map