import type { Euler } from "./euler.js";
import type { Quaternion } from "./quaternion.js";
import { Vector3 } from "./vector3.js";
/**
 * A matrix with 3 x 3 components.
 */
export declare class Matrix3 {
    /**
     * The components of the matrix.
     */
    m: number[][];
    /**
     * Get position `0,0` of this matrix.
     * @returns The position `0,0` of this matrix.
     */
    get m00(): number;
    /**
     * Set position `0,0` of this matrix.
     */
    set m00(value: number);
    /**
     * Get position `1,0` of this matrix.
     * @returns The position `1,0` of this matrix.
     */
    get m10(): number;
    /**
     * Set position `1,0` of this matrix.
     */
    set m10(value: number);
    /**
     * Get position `2,0` of this matrix.
     * @returns The position `2,0` of this matrix.
     */
    get m20(): number;
    /**
     * Set position `2,0` of this matrix.
     */
    set m20(value: number);
    /**
     * Get position `0,1` of this matrix.
     * @returns The position `0,1` of this matrix.
     */
    get m01(): number;
    /**
     * Set position `0,1` of this matrix.
     */
    set m01(value: number);
    /**
     * Get position `1,1` of this matrix.
     * @returns The position `1,1` of this matrix.
     */
    get m11(): number;
    /**
     * Set position `1,1` of this matrix.
     */
    set m11(value: number);
    /**
     * Get position `2,1` of this matrix.
     * @returns The position `2,1` of this matrix.
     */
    get m21(): number;
    /**
     * Set position `2,1` of this matrix.
     */
    set m21(value: number);
    /**
     * Get position `0,2` of this matrix.
     * @returns The position `0,2` of this matrix.
     */
    get m02(): number;
    /**
     * Set position `0,2` of this matrix.
     */
    set m02(value: number);
    /**
     * Get position `1,2` of this matrix.
     * @returns The position `1,2` of this matrix.
     */
    get m12(): number;
    /**
     * Set position `1,2` of this matrix.
     */
    set m12(value: number);
    /**
     * Get position `2,2` of this matrix.
     * @returns The position `2,2` of this matrix.
     */
    get m22(): number;
    /**
     * Set position `2,2` of this matrix.
     */
    set m22(value: number);
    /**
     * Constructs a new {@linkcode Matrix3}.
     * @param m00 - Position `0,0` of this matrix.
     * @param m10 - Position `1,0` of this matrix.
     * @param m20 - Position `2,0` of this matrix.
     * @param m01 - Position `0,1` of this matrix.
     * @param m11 - Position `1,1` of this matrix.
     * @param m21 - Position `2,1` of this matrix.
     * @param m02 - Position `0,2` of this matrix.
     * @param m12 - Position `1,2` of this matrix.
     * @param m22 - Position `2,2` of this matrix.
     */
    constructor(m00?: number, m10?: number, m20?: number, m01?: number, m11?: number, m21?: number, m02?: number, m12?: number, m22?: number);
    /**
     * Creates a new {@linkcode Matrix3} from another {@linkcode Matrix3}.
     * @param matrix - The matrix to copy.
     * @returns A new matrix.
     */
    static fromMatrix3(matrix: Readonly<Matrix3>): Matrix3;
    /**
     * Creates a new {@linkcode Matrix3} from a rotation in Euler angles.
     * @param degrees - The rotation in Euler angles.
     * @returns A new matrix.
     */
    static fromEuler(degrees: Readonly<Euler>): Matrix3;
    /**
     * Creates a new {@linkcode Matrix3} from a rotation around an axis.
     * @param axis - The axis around which to rotate.
     * @param degrees - The rotation in degrees.
     * @returns A new matrix.
     */
    static fromVector3(axis: Readonly<Vector3>, degrees: number): Matrix3;
    /**
     * Creates a new {@linkcode Matrix3} from a quaternion.
     * @param quaternion - The quaternion describes the rotation.
     * @returns A new matrix.
     */
    static fromQuaternion(quaternion: Readonly<Quaternion>): Matrix3;
    /**
     * Sets the matrix to new values from another matrix.
     * @param matrix - The matrix to copy.
     * @returns This instance.
     */
    set(matrix: Readonly<Matrix3>): this;
    /**
     * Update the matrix by individual components.
     * @param m00 - Position `0,0` of this matrix.
     * @param m10 - Position `1,0` of this matrix.
     * @param m20 - Position `2,0` of this matrix.
     * @param m01 - Position `0,1` of this matrix.
     * @param m11 - Position `1,1` of this matrix.
     * @param m21 - Position `2,1` of this matrix.
     * @param m02 - Position `0,2` of this matrix.
     * @param m12 - Position `1,2` of this matrix.
     * @param m22 - Position `2,2` of this matrix.
     * @returns This instance.
     */
    setM(m00: number, m10: number, m20: number, m01: number, m11: number, m21: number, m02: number, m12: number, m22: number): this;
    /**
     * Sets the matrix to a rotation in Euler angles.
     * @param degrees - The rotation in Euler angles.
     * @returns This instance.
     */
    setEuler(degrees: Readonly<Euler>): this;
    /**
     * Sets the matrix to a rotation around an axis.
     * @param axis - The axis around which to rotate.
     * @param degrees - The rotation in degrees.
     * @returns This instance.
     */
    setVector3(axis: Readonly<Vector3>, degrees: number): this;
    /**
     * Sets the matrix to a rotation described by a quaternion.
     * @param quaternion - The quaternion describing the rotation.
     * @returns This instance.
     */
    setQuaternion(quaternion: Readonly<Quaternion>): this;
    /**
     * Normalizes the matrix.
     * @returns This instance.
     */
    normalize(): this;
    /**
     * Inverts the matrix.
     * @returns This instance.
     */
    invert(): this;
    /**
     * Multiply with another matrix from the right.
     * @param matrix - The matrix to multiply with.
     * @returns This instance.
     */
    multiplyR(matrix: Readonly<Matrix3>): this;
    /**
     * Inversely multiply with another matrix from the right.
     * @param matrix - The matrix to multiply with.
     * @returns This instance.
     */
    multiplyInverseR(matrix: Readonly<Matrix3>): this;
    /**
     * Multiply with another matrix from the left.
     * @param matrix - The matrix to multiply with.
     * @returns This instance.
     */
    multiplyL(matrix: Readonly<Matrix3>): this;
    /**
     * Inversely multiply with another matrix from the right.
     * @param matrix - The matrix to multiply with.
     * @returns This instance.
     */
    multiplyInverseL(matrix: Readonly<Matrix3>): this;
    /**
     * Sets this matrix up as a transformation matrix to look in a given direction.
     * @param direction - The direction to look in.
     * @param upVector - The vector indicating the up direction. If not provided
     * a best effort is made to find a good one.
     * @returns This instance.
     */
    lookAt(direction: Readonly<Vector3>, upVector?: Readonly<Vector3>): this;
    /**
     * Return the components of this matrix as an array.
     * @returns The components of this matrix as an array.
     */
    asArray(): [
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number
    ];
}