import type { ReadonlyVec, Vec } from "./api.js";
/**
 * Computes direction vector `a` -> `b`, normalized to length `n`
 * (default 1).
 *
 * @param a -
 * @param b -
 * @param n -
 */
export declare const direction: (out: Vec | null, a: ReadonlyVec, b: ReadonlyVec, n?: number) => Vec;
export declare const direction2: (out: Vec | null, a: ReadonlyVec, b: ReadonlyVec, n?: number) => Vec;
export declare const direction3: (out: Vec | null, a: ReadonlyVec, b: ReadonlyVec, n?: number) => Vec;
//# sourceMappingURL=direction.d.ts.map