/******************************************************************************
 * Spine Runtimes License Agreement
 * Last updated April 5, 2025. Replaces all prior versions.
 *
 * Copyright (c) 2013-2025, Esoteric Software LLC
 *
 * Integration of the Spine Runtimes into software or otherwise creating
 * derivative works of the Spine Runtimes is permitted under the terms and
 * conditions of Section 2 of the Spine Editor License Agreement:
 * http://esotericsoftware.com/spine-editor-license
 *
 * Otherwise, it is permitted to integrate the Spine Runtimes into software
 * or otherwise create derivative works of the Spine Runtimes (collectively,
 * "Products"), provided that each user of the Products must obtain their own
 * Spine Editor license and redistribution of the Products in any form must
 * include this license and copyright notice.
 *
 * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
 * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/
import type { BoneData } from "./BoneData.js";
import { ConstraintData } from "./ConstraintData.js";
import { IkConstraint } from "./IkConstraint.js";
import { IkConstraintPose } from "./IkConstraintPose.js";
import type { Skeleton } from "./Skeleton.js";
/** Stores the setup pose for an {@link IkConstraint}.
 *
 * See [IK constraints](http://esotericsoftware.com/spine-ik-constraints) in the Spine User Guide. */
export declare class IkConstraintData extends ConstraintData<IkConstraint, IkConstraintPose> {
    /** The bones that are constrained by this IK constraint. */
    bones: BoneData[];
    private _target;
    /** The bone that is the IK target. */
    set target(boneData: BoneData);
    get target(): BoneData;
    /** Determines how the {@link BonePose.scaleY} changes when {@link IkConstraintPose.compress} or
      * {@link IkConstraintPose.stretch} set {@link BonePose.scaleX}. */
    _scaleYMode: ScaleYMode;
    set scaleYMode(scaleYMode: ScaleYMode);
    get scaleYMode(): ScaleYMode;
    constructor(name: string);
    create(skeleton: Skeleton): IkConstraint;
}
/** Determines how the {@link BonePose.scaleY} changes when {@link IkConstraintPose.compress} or
 * {@link IkConstraintPose.stretch} set {@link BonePose.scaleX}. */
export declare enum ScaleYMode {
    /** scaleY is not changed. */
    None = 0,
    /** scaleY is multiplied by the scaleX factor, preserving the bone's aspect ratio. */
    Uniform = 1,
    /** scaleY is divided by the scaleX factor, preserving the bone's area. */
    Volume = 2
}
