import { Vec2 } from '../types/common';
export declare const PI: number;
export declare const TAU: number;
export declare const PI2: number;
export declare const PI4: number;
export declare const PI8: number;
/**
 * Given a 2D rectangle and an angle off the center, find the point
 * of the closest corner. Used for anchoring connector lines
 * to annotation labels.
 */
export declare function edgeOfRectangle(rect: Vec2, theta: number): Vec2;