/**
 * 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 { Line3, Vector3 } from 'three';
import type { Environment } from '../environment/environment-manager.js';
export interface CapsuleInfo {
    radius: number;
    segment: Line3;
}
/**
 * Handles collision detection and response for capsule shapes
 * Reuses temporary objects for performance
 */
export declare class CollisionHandler {
    private tempSegment;
    private tempPosition;
    private positionDelta;
    private aabbox;
    private rayVector;
    private localSegment;
    private localTriPoint;
    private localCapsulePoint;
    private tempMatrix4;
    constructor();
    /**
     * Handle capsule collision across multiple environments and return corrected position
     * Modifies velocity to remove collision penetration
     */
    handleCapsuleCollision(environments: Environment[], capsuleInfo: CapsuleInfo, playerPosition: Vector3, playerVelocity: Vector3): Vector3;
    /**
     * Perform shapecast collision detection for capsule against environment with matrix transform
     */
    private shapecastCapsule;
}
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