import Matrix2 from './Matrix2';
export default class Matrix3 extends Matrix2 {
    readonly e: number;
    readonly f: number;
    readonly g: number;
    readonly h: number;
    readonly i: number;
    static readonly ElementCount: number;
    constructor(a?: number, b?: number, c?: number, d?: number, e?: number, f?: number, g?: number, h?: number, i?: number);
    get elements(): number[];
    determine(): number;
    add({ elements }: Matrix3): Matrix3;
    multiply({ columns }: Matrix3): Matrix3;
    multiplyScalar(scalar: number): Matrix3;
    transpose(): Matrix3;
    cofactor(): Matrix3;
    invert(): Matrix3;
    protected static columnsToRows([a, d, g, b, e, h, c, f, i]: Array<number>): Array<number>;
    protected static rowsToColumns([a, b, c, d, e, f, g, h, i]: Array<number>): Array<number>;
}
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