/**
 * Validates that a control point grid has consistent dimensions and is compatible with the given degrees.
 * For surfaces: checks that all rows have the same length and dimensions are >= degree + 1.
 */
export declare function validateControlPoints(controlPoints: number[][][], degreeU: number, degreeV: number): string | null;
/**
 * Validates a knot vector: correct length, non-decreasing.
 */
export declare function validateKnots(knots: number[], numControlPoints: number, degree: number, name?: string): string | null;
/**
 * Validates that a 2D weights array matches the control points dimensions.
 */
export declare function validateWeights2D(weights: number[][], controlPoints: number[][][]): string | null;
/**
 * Validates that a 1D weights array matches the control points count.
 */
export declare function validateWeights1D(weights: number[], numControlPoints: number): string | null;
/**
 * Validates that a degree is valid for the given number of control points.
 */
export declare function validateDegree(degree: number, numControlPoints: number, name?: string): string | null;