/*
 * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @file
 * @kit ArkUI
 */

/**
 * Contains interpolator functions such as initialization, third-order Bezier curves, and spring curves.
 *
 * @namespace curves
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 7
 */
/**
 * Contains interpolator functions such as initialization, third-order Bezier curves, and spring curves.
 *
 * @namespace curves
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * Contains interpolator functions such as initialization, third-order Bezier curves, and spring curves.
 *
 * @namespace curves
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare namespace curves {
  /**
   * enum Curve.
   *
   * @enum { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * enum Curve.
   *
   * @enum { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * enum Curve.
   *
   * @enum { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  enum Curve {
    /**
     * Linear. Indicates that the animation has the same velocity from start to finish.
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * Linear. Indicates that the animation has the same velocity from start to finish.
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * Linear. Indicates that the animation has the same velocity from start to finish.
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    Linear,
    /**
     * Ease. Indicates that the animation starts at a low speed, then speeds up, and slows down before the end,
     * CubicBezier(0.25, 0.1, 0.25, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * Ease. Indicates that the animation starts at a low speed, then speeds up, and slows down before the end,
     * CubicBezier(0.25, 0.1, 0.25, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * Ease. Indicates that the animation starts at a low speed, then speeds up, and slows down before the end,
     * CubicBezier(0.25, 0.1, 0.25, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    Ease,
    /**
     * EaseIn. Indicates that the animation starts at a low speed, Cubic Bezier (0.42, 0.0, 1.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * EaseIn. Indicates that the animation starts at a low speed, Cubic Bezier (0.42, 0.0, 1.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * EaseIn. Indicates that the animation starts at a low speed, Cubic Bezier (0.42, 0.0, 1.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    EaseIn,
    /**
     * EaseOut. Indicates that the animation ends at low speed, CubicBezier (0.0, 0.0, 0.58, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * EaseOut. Indicates that the animation ends at low speed, CubicBezier (0.0, 0.0, 0.58, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * EaseOut. Indicates that the animation ends at low speed, CubicBezier (0.0, 0.0, 0.58, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    EaseOut,
    /**
     * EaseInOut. Indicates that the animation starts and ends at low speed, CubicBezier (0.42, 0.0, 0.58, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * EaseInOut. Indicates that the animation starts and ends at low speed, CubicBezier (0.42, 0.0, 0.58, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * EaseInOut. Indicates that the animation starts and ends at low speed, CubicBezier (0.42, 0.0, 0.58, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    EaseInOut,
    /**
     * FastOutSlowIn. Standard curve, cubic-bezier (0.4, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * FastOutSlowIn. Standard curve, cubic-bezier (0.4, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * FastOutSlowIn. Standard curve, cubic-bezier (0.4, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    FastOutSlowIn,
    /**
     * LinearOutSlowIn. Deceleration curve, cubic-bezier (0.0, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * LinearOutSlowIn. Deceleration curve, cubic-bezier (0.0, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * LinearOutSlowIn. Deceleration curve, cubic-bezier (0.0, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    LinearOutSlowIn,
    /**
     * FastOutLinearIn. Acceleration curve, cubic-bezier (0.4, 0.0, 1.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * FastOutLinearIn. Acceleration curve, cubic-bezier (0.4, 0.0, 1.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * FastOutLinearIn. Acceleration curve, cubic-bezier (0.4, 0.0, 1.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    FastOutLinearIn,
    /**
     * ExtremeDeceleration. Abrupt curve, cubic-bezier (0.0, 0.0, 0.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * ExtremeDeceleration. Abrupt curve, cubic-bezier (0.0, 0.0, 0.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * ExtremeDeceleration. Abrupt curve, cubic-bezier (0.0, 0.0, 0.0, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    ExtremeDeceleration,
    /**
     * Sharp. Sharp curves, cubic-bezier (0.33, 0.0, 0.67, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * Sharp. Sharp curves, cubic-bezier (0.33, 0.0, 0.67, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * Sharp. Sharp curves, cubic-bezier (0.33, 0.0, 0.67, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    Sharp,
    /**
     * Rhythm. Rhythmic curve, cubic-bezier (0.7, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * Rhythm. Rhythmic curve, cubic-bezier (0.7, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * Rhythm. Rhythmic curve, cubic-bezier (0.7, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    Rhythm,
    /**
     * Smooth. Smooth curves, cubic-bezier (0.4, 0.0, 0.4, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * Smooth. Smooth curves, cubic-bezier (0.4, 0.0, 0.4, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * Smooth. Smooth curves, cubic-bezier (0.4, 0.0, 0.4, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    Smooth,
    /**
     * Friction. Damping curves, CubicBezier (0.2, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 7
     */
    /**
     * Friction. Damping curves, CubicBezier (0.2, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * Friction. Damping curves, CubicBezier (0.2, 0.0, 0.2, 1.0).
     *
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    Friction,
  }

  /**
   * Interface for curve object.
   *
   * @typedef ICurve
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Interface for curve object.
   *
   * @typedef ICurve
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Interface for curve object.
   *
   * @typedef ICurve
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  interface ICurve {
    /**
     * Get curve value by fraction.
     *
     * @param { number } fraction -Indicates the current normalized time parameter. Value range: [0, 1].
     * Note: If the value is less than 0, it will be processed as 0. If the value is greater than 1, 1 is used.
     * @returns { number }
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @since 9
     */
    /**
     * Get curve value by fraction.
     *
     * @param { number } fraction -Indicates the current normalized time parameter. Value range: [0, 1].
     * Note: If the value is less than 0, it will be processed as 0. If the value is greater than 1, 1 is used.
     * @returns { number }
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @since 10
     */
    /**
     * Get curve value by fraction.
     *
     * @param { number } fraction -Indicates the current normalized time parameter. Value range: [0, 1].
     * Note: If the value is less than 0, it will be processed as 0. If the value is greater than 1, 1 is used.
     * @returns { number }
     * @syscap SystemCapability.ArkUI.ArkUI.Full
     * @crossplatform
     * @atomicservice
     * @since 11
     */
    interpolate(fraction: number): number;
  }

  /**
   * Initializes the interpolator curve when called.
   *
   * @param { Curve } [curve] The default value is Curve.Linear
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Initializes the interpolator curve when called.
   *
   * @param { Curve } [curve] The default value is Curve.Linear
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Initializes the interpolator curve when called.
   *
   * @param { Curve } [curve] The default value is Curve.Linear
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function initCurve(curve?: Curve): ICurve;

  /**
   * Initializes the interpolator curve when called.
   *
   * @param { Curve } [curve]
   * @returns { string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   * @deprecated since 9
   * @useinstead initCurve
   */
  function init(curve?: Curve): string;

  /**
   * Constructs a step curve when called.
   *
   * @param { number } count -The number of steps. The range of this value is [1, +∞).
   * @param { boolean } end -A step change occurs at the start or end of each interval.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Constructs a step curve when called.
   *
   * @param { number } count -The number of steps. The range of this value is [1, +∞).
   * @param { boolean } end -A step change occurs at the start or end of each interval.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Constructs a step curve when called.
   *
   * @param { number } count -The number of steps. The range of this value is [1, +∞).
   * @param { boolean } end -A step change occurs at the start or end of each interval.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function stepsCurve(count: number, end: boolean): ICurve;

  /**
   * Constructs a custom curve when called.
   *
   * @param { function } interpolate - fraction range is [0,1], the return number must between [0,1].
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Constructs a custom curve when called.
   *
   * @param { function } interpolate - fraction range is [0,1], the return number must between [0,1].
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function customCurve(interpolate: (fraction: number) => number): ICurve;
  
  /**
   * Constructs a step curve when called.
   *
   * @param { number } count
   * @param { boolean } end
   * @returns { string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   * @deprecated since 9
   * @useinstead stepsCurve
   */
  function steps(count: number, end: boolean): string;

  /**
   * Constructs a third-order Bezier curve when called.
   * @param { number } x1 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y1 -Value range (-∞, +∞).
   * @param { number } x2 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y2 -Value range (-∞, +∞).
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Constructs a third-order Bezier curve when called.
   *
   * @param { number } x1 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y1 -Value range (-∞, +∞).
   * @param { number } x2 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y2 -Value range (-∞, +∞).
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Constructs a third-order Bezier curve when called.
   *
   * @param { number } x1 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y1 -Value range (-∞, +∞).
   * @param { number } x2 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y2 -Value range (-∞, +∞).
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function cubicBezierCurve(x1: number, y1: number, x2: number, y2: number): ICurve;

  /**
   * Constructs a third-order Bezier curve when called.
   *
   * @param { number } x1 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y1 -Value range (-∞, +∞).
   * @param { number } x2 -Value range [0, 1].
   * Note: If the value is less than 0, 0 is used. If the value is greater than 1, 1 is used.
   * @param { number } y2 -Value range (-∞, +∞).
   * @returns { string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   * @deprecated since 9
   * @useinstead cubicBezierCurve
   */
  function cubicBezier(x1: number, y1: number, x2: number, y2: number): string;

  /**
   * Constructs a spring curve when called. For more information about the meaning of the parameter, see spring().
   *
   * @param { number } velocity -Value range (-∞, +∞).
   * @param { number } mass -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @param { number } stiffness -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @param { number } damping -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Constructs a spring curve when called.
   *
   * @param { number } velocity -Value range (-∞, +∞).
   * @param { number } mass -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @param { number } stiffness -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @param { number } damping -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Constructs a spring curve when called.
   *
   * @param { number } velocity -Value range (-∞, +∞).
   * @param { number } mass -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @param { number } stiffness -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @param { number } damping -Value range (0, +∞). Note: If the value is less than or equal to 0, 1 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function springCurve(velocity: number, mass: number, stiffness: number, damping: number): ICurve;

  /**
   * Constructs a spring curve when called.
   *
   * @param { number } velocity -Initial velocity. An influence parameter of external factors on elastic dynamics,
   * purpose is to ensure a smooth transition of the object from the previous state of motion to the elastic dynamics.
   * @param { number } mass -Quality. The force object of the elastic system will have an inertial effect on elastic
   * system. The greater the mass, the greater the amplitude of the oscillation.
   * @param { number } stiffness -The degree to which an object is deformed by resisting the applied force.
   * @param { number } damping -Pure number, Used to describe oscillation and decay of a system after being disturbed.
   * @returns { string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   * @deprecated since 9
   * @useinstead springCurve
   */
  function spring(velocity: number, mass: number, stiffness: number, damping: number): string;

  /**
   * Constructs a spring motion when called.
   *
   * @param { number } [response] The default value is 0.55. Unit: seconds. Value range: (0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.55 is used.
   * @param { number } [dampingFraction] The default value is 0.825. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.825 is used.
   * @param { number } [overlapDuration] The default value is 0. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Constructs a spring motion when called.
   *
   * @param { number } [response] The default value is 0.55. Unit: seconds. Value range: (0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.55 is used.
   * @param { number } [dampingFraction] The default value is 0.825. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.825 is used.
   * @param { number } [overlapDuration] The default value is 0. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Constructs a spring motion when called.
   *
   * @param { number } [response] The default value is 0.55. Unit: seconds. Value range: (0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.55 is used.
   * @param { number } [dampingFraction] The default value is 0.825. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.825 is used.
   * @param { number } [overlapDuration] The default value is 0. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function springMotion(response?: number, dampingFraction?: number, overlapDuration?: number): ICurve;

  /**
   * Constructs a responsive spring motion when called.
   *
   * @param { number } [response] The default value is 0.15. Unit: seconds. Value range: (0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.15 is used.
   * @param { number } [dampingFraction] The default value is 0.86. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.86 is used.
   * @param { number } [overlapDuration] The default value is 0.25. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.25 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Constructs a responsive spring motion when called.
   *
   * @param { number } [response] The default value is 0.15. Unit: seconds. Value range: (0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.15 is used.
   * @param { number } [dampingFraction] The default value is 0.86. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.86 is used.
   * @param { number } [overlapDuration] The default value is 0.25. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.25 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Constructs a responsive spring motion when called.
   * The parameters are interpreted as in springMotion.
   *
   * @param { number } [response] The default value is 0.15. Unit: seconds. Value range: (0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.15 is used.
   * @param { number } [dampingFraction] The default value is 0.86. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.86 is used.
   * @param { number } [overlapDuration] The default value is 0.25. Unit: seconds. Value range: [0, +∞).
   * Note: If a value is set to 0 or less, the default value of 0.25 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function responsiveSpringMotion(response?: number, dampingFraction?: number, overlapDuration?: number): ICurve;

  /**
   * Constructs an interpolating spring curve when called, the animation duration can not be specified manually,
   * and is determined by parameters of the curve. It produces values change from 0 to 1, and then uses interpolator
   * to calculate the actual animation values.
   *
   * @param { number } velocity - the initial velocity of the spring, and is a normalized speed corresponding to the
   * value changes from 0 to 1,specific value range (-∞, ∞).
   * @param { number } mass - the mass of object in the mass-damper-spring system, value range (0, +∞).
   * Note: If the value is less than or equal to 0, the value 1 is used.
   * @param { number } stiffness - the stiffness of spring, value range (0, +∞).
   * Note: If the value is less than or equal to 0, the value 1 is used.
   * @param { number } damping - the damping value of spring, value range (0, +∞).
   * Note: If the value is less than or equal to 0, the value 1 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Constructs an interpolating spring curve when called, the animation duration can not be specified manually,
   * and is determined by parameters of the curve. It produces values change from 0 to 1, and then uses interpolator
   * to calculate the actual animation values.
   *
   * @param { number } velocity - the initial velocity of the spring, and is a normalized speed corresponding to the
   * value changes from 0 to 1,specific value range (-∞, ∞).
   * @param { number } mass - the mass of object in the mass-damper-spring system, value range (0, +∞).
   * Note: If the value is less than or equal to 0, the value 1 is used.
   * @param { number } stiffness - the stiffness of spring, value range (0, +∞).
   * Note: If the value is less than or equal to 0, the value 1 is used.
   * @param { number } damping - the damping value of spring, value range (0, +∞).
   * Note: If the value is less than or equal to 0, the value 1 is used.
   * @returns { ICurve }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  function interpolatingSpring(velocity: number, mass: number, stiffness: number, damping: number): ICurve;
}

export default curves;