import type { ReadonlyVec, Vec } from "./api.js";
/**
 * Vector version of
 * [`mixCubic`](https://docs.thi.ng/umbrella/math/functions/mixCubic.html).
 *
 * @param out - result
 * @param a -
 * @param b -
 * @param c -
 * @param d -
 * @param t - interpolation coeff `[0,1]`
 */
export declare const mixCubic: (out: Vec | null, a: ReadonlyVec, b: ReadonlyVec, c: ReadonlyVec, d: ReadonlyVec, t: number) => Vec<number>;
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