/******************************************************************************
 * 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
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 * (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
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 *****************************************************************************/
import type { BonePose } from "./BonePose.js";
import { Constraint } from "./Constraint.js";
import { Physics } from "./Physics.js";
import type { PhysicsConstraintData } from "./PhysicsConstraintData.js";
import { PhysicsConstraintPose } from "./PhysicsConstraintPose.js";
import { Skeleton } from "./Skeleton.js";
/** Applies physics to a bone.
 *
 * See <a href="http://esotericsoftware.com/spine-physics-constraints">Physics constraints</a> in the Spine User Guide. */
export declare class PhysicsConstraint extends Constraint<PhysicsConstraint, PhysicsConstraintData, PhysicsConstraintPose> {
    bone: BonePose;
    _reset: boolean;
    ux: number;
    uy: number;
    cx: number;
    cy: number;
    tx: number;
    ty: number;
    xOffset: number;
    xLag: number;
    xVelocity: number;
    yOffset: number;
    yLag: number;
    yVelocity: number;
    rotateOffset: number;
    rotateLag: number;
    rotateVelocity: number;
    scaleOffset: number;
    scaleLag: number;
    scaleVelocity: number;
    remaining: number;
    lastTime: number;
    constructor(data: PhysicsConstraintData, skeleton: Skeleton);
    copy(skeleton: Skeleton): PhysicsConstraint;
    /** Resets all physics state that was the result of previous movement. Use this after moving a bone to prevent physics from
     * reacting to the movement. */
    reset(skeleton: Skeleton): void;
    /** Translates the physics constraint so the next {@link update} forces are applied as if the bone moved an
     * additional amount in world space. */
    translate(x: number, y: number): void;
    /** Rotates the physics constraint so the next {@link update} forces are applied as if the bone rotated
     * around the specified point in world space. */
    rotate(x: number, y: number, degrees: number): void;
    /** Applies the constraint to the constrained bones. */
    update(skeleton: Skeleton, physics: Physics): void;
    sort(skeleton: Skeleton): void;
    isSourceActive(): boolean;
}