/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
import { Vector3 } from 'three';
/**
 * Static physics utility functions for locomotion
 * Performance-optimized with no object allocations
 */
export declare class PhysicsUtils {
    static calculateSpringForce(displacement: number, springConstant: number): number;
    static calculateDampingForce(velocity: number, dampingConstant: number): number;
    static clampForce(force: number, maxForce: number): number;
    static applyGravity(velocity: Vector3, gravityDir: Vector3, gravity: number, gravityMultiplier: number, delta: number): void;
    static applyFloatingForce(velocity: Vector3, upAxis: Vector3, springForce: number, dampingForce: number, maxForce: number, mass: number, delta: number): void;
    static calculateTargetDistance(floatHeight: number, capsuleRadius: number): number;
    static isGrounded(groundDistance: number, groundingThreshold: number): boolean;
    static calculateGroundingThreshold(floatHeight: number, capsuleRadius: number, buffer?: number): number;
    static isWalkableSlope(surfaceNormal: Vector3, upAxis: Vector3, maxSlope: number): boolean;
    static capVelocity(velocity: Vector3, maxVelocity: number): void;
}
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