import type { ReadonlyVec } from "@thi.ng/vectors";
import { type IntersectionResult } from "./api.js";
/**
 * 2D only. Computes intersection between 2 given circles.
 *
 * @remarks
 * Reference:
 * https://mathworld.wolfram.com/Circle-CircleIntersection.html (eq. 5)
 *
 * @param a - circle 1 origin
 * @param b - circle 2 origin
 * @param ar - circle 1 radius
 * @param br - circle 2 radius
 */
export declare const intersectCircleCircle: (a: ReadonlyVec, b: ReadonlyVec, ar: number, br: number) => IntersectionResult;
/**
 * Returns true, if given circles (or spheres) overlap.
 *
 * @param a - circle 1 origin
 * @param b - circle 2 origin
 * @param ar - circle 1 radius
 * @param br - circle 2 radius
 */
export declare const testCircleCircle: (a: ReadonlyVec, b: ReadonlyVec, ar: number, br: number) => boolean;
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