/**
 * 计算两条线段的交点
 */
export declare function getIntersection(p1: [number, number], p2: [number, number], p3: [number, number], p4: [number, number]): [number, number] | null;
/**
 * 判断点是否在多边形内
 */
export declare function isPointInPolygon(point: [number, number], polygon: [number, number][]): boolean;