import { CesiumWidget, PrimitiveCollection } from '@cesium/engine';
declare class SnowCover {
    private _viewer;
    private _delegate;
    private _enable;
    private _snowAlpha;
    private _requestRenderMode;
    private _speed;
    private _timerID;
    private _modelArray;
    constructor(viewer: CesiumWidget);
    get type(): string;
    get delegate(): any;
    set enable(enable: boolean);
    get enable(): boolean;
    set SnowAlpha(alpha: number);
    get SnowAlpha(): number;
    set speed(speed: number);
    get speed(): number;
    _startSnowProcess(): void;
    /**
     *
     * @private
     */
    _createPostProcessStage(): void;
    /**
     * 刷新绑定Model和Tileset3D的CustomShader
     */
    refreshBindCustomShader(): void;
    _recursePrimitives(primitives: PrimitiveCollection, customShader: any, modelArray: any[]): void;
    unbindCustomShader(): void;
    destroy(): void;
}
export default SnowCover;