/** @internal */
export declare function isCross(x11: number, y11: number, x12: number, y12: number, x21: number, y21: number, x22: number, y22: number): boolean;
/** @internal */
export declare function isCrossBox(x1: number, y1: number, x2: number, y2: number, bx1: number, by1: number, bx2: number, by2: number): boolean;