/**
 * FogSystem.ts
 *
 * Fog: linear, exponential, exponential-squared, and height fog.
 * Supports color blending, density maps, and animation.
 *
 * @module rendering
 */
export type FogMode = 'linear' | 'exponential' | 'exponential2';
export interface FogConfig {
    mode: FogMode;
    color: [number, number, number];
    nearDistance: number;
    farDistance: number;
    density: number;
    heightFog: boolean;
    heightStart: number;
    heightEnd: number;
    heightDensity: number;
    enabled: boolean;
}
export declare class FogSystem {
    private config;
    private animation;
    constructor(config?: Partial<FogConfig>);
    setConfig(config: Partial<FogConfig>): void;
    getConfig(): FogConfig;
    setEnabled(enabled: boolean): void;
    isEnabled(): boolean;
    computeFogFactor(distance: number, height?: number): number;
    private computeHeightFactor;
    blendWithFog(sceneColor: [number, number, number], distance: number, height?: number): [number, number, number];
    setAnimation(speed: number): void;
    update(dt: number): void;
}
//# sourceMappingURL=FogSystem.d.ts.map