import { Vec2 } from "./CheckIntersect";
export declare function orientation(p: Vec2, q: Vec2, r: Vec2): number;
/**
 * 判断线段`p1q1`和线段`p2q2`是否相交.
 */
export declare function doIntersect(p1: Vec2, q1: Vec2, p2: Vec2, q2: Vec2): boolean;
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