import { mat4 } from 'gl-matrix';
export declare const VEC3_ZERO: [number, number, number];
export declare const VEC3_ONE: [number, number, number];
export declare const VEC2_ZERO: [number, number];
export declare const VEC2_ONE: [number, number];
/**
 * Skew matrix
 *
 * @internal
 * @ignore
 */
export declare function fromSkew(out: mat4, skew: [number, number]): mat4;
/**
 * number to vec 2
 *
 * @internal
 * @ignore
 */
export declare function toVec2(x: number | Array<number>): [number, number];
/**
 * number to vec 3
 *
 * @internal
 * @ignore
 */
export declare function toVec3(x: number | Array<number>, defaultZValue?: number): [number, number, number];
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