import { NurbsCurve, NurbsSurface } from "../core";
/**
 * Refine a curve by inserting additional knots without changing its shape.
 */
export declare function curveKnotRefine(curve: NurbsCurve, knotsToInsert: number[]): NurbsCurve;
/**
 * Refine a surface by inserting additional knots in U or V direction.
 */
export declare function surfaceKnotRefine(surface: NurbsSurface, knotsToInsert: number[], useV: boolean): NurbsSurface;
/**
 * Elevate the degree of a curve.
 */
export declare function curveElevateDegree(curve: NurbsCurve, finalDegree: number): NurbsCurve;
/**
 * Unify knot vectors across multiple curves (same degree + knots).
 * Required before operations like lofting with incompatible curves.
 */
export declare function unifyCurveKnots(curves: NurbsCurve[]): NurbsCurve[];