export declare const SIZE_STEPS = 20;
export declare function calcSize(innerSize: number, minSize: number, maxSize: number): number;
export declare function calcOpacity(size: number, minSize: number, maxSize: number, minOpacity: number, maxOpacity: number): number;
export declare function calcDuration(size: number, minSize: number, maxSize: number, height: number, speed: number): number;
export declare function calcDelay(random: number, height: number, speed: number): number;
export declare function calcTrajectory(isBody: boolean, height: number, maxSize: number): {
    fromY: string;
    toY: string;
};