/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2012-2018 DragonBones team and other contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
import { Matrix } from "./Matrix.js";
/**
 * [en] 2D Transform.
 *
 * [zh] 2D 变换。
 *
 * @version DragonBones 3.0
 */
export declare class Transform {
    /**
     * @private
     */
    static readonly PI: number;
    /**
     * @private
     */
    static readonly PI_D: number;
    /**
     * @private
     */
    static readonly PI_H: number;
    /**
     * @private
     */
    static readonly PI_Q: number;
    /**
     * @private
     */
    static readonly RAD_DEG: number;
    /**
     * @private
     */
    static readonly DEG_RAD: number;
    /**
     * @private
     */
    static normalizeRadian(value: number): number;
    /**
     * [en] Horizontal translate.
     *
     * [zh] 水平位移。
     *
     * @version DragonBones 3.0
     */
    x: number;
    /**
     * [en] Vertical translate.
     *
     * [zh] 垂直位移。
     *
     * @version DragonBones 3.0
     */
    y: number;
    /**
     * [en] Skew. (In radians)
     *
     * [zh] 倾斜。 （以弧度为单位）
     *
     * @version DragonBones 3.0
     */
    skew: number;
    /**
     * [en] rotation. (In radians)
     *
     * [zh] 旋转。 （以弧度为单位）
     *
     * @version DragonBones 3.0
     */
    rotation: number;
    /**
     * [en] Horizontal Scaling.
     *
     * [zh] 水平缩放。
     *
     * @version DragonBones 3.0
     */
    scaleX: number;
    /**
     * [en] Vertical scaling.
     *
     * [zh] 垂直缩放。
     *
     * @version DragonBones 3.0
     */
    scaleY: number;
    /**
     * @private
     */
    constructor(x?: number, y?: number, skew?: number, rotation?: number, scaleX?: number, scaleY?: number);
    toString(): string;
    /**
     * @private
     */
    copyFrom(value: Transform): Transform;
    /**
     * @private
     */
    identity(): Transform;
    /**
     * @private
     */
    add(value: Transform): Transform;
    /**
     * @private
     */
    minus(value: Transform): Transform;
    /**
     * @private
     */
    fromMatrix(matrix: Matrix): Transform;
    /**
     * @private
     */
    toMatrix(matrix: Matrix): Transform;
}