/**
 * A bounding sphere is a volume for facilitating fast intersection testing.
 *
 * @category Math
 */
export class BoundingSphere {
    /**
     * Creates a new BoundingSphere instance.
     *
     * @param {Vec3} [center] - The world space coordinate marking the center of the sphere. The
     * constructor takes a reference of this parameter.
     * @param {number} [radius] - The radius of the bounding sphere. Defaults to 0.5.
     * @example
     * // Create a new bounding sphere centered on the origin with a radius of 0.5
     * const sphere = new pc.BoundingSphere();
     */
    constructor(center?: Vec3, radius?: number);
    /**
     * Center of sphere.
     *
     * @type {Vec3}
     * @readonly
     */
    readonly center: Vec3;
    /**
     * The radius of the bounding sphere.
     *
     * @type {number}
     */
    radius: number;
    /**
     * Test if a point is inside the sphere.
     *
     * @param {Vec3} point - Point to test.
     * @returns {boolean} True if the point is inside the sphere and false otherwise.
     * @example
     * const sphere = new pc.BoundingSphere(new pc.Vec3(0, 0, 0), 1);
     * const point = new pc.Vec3(0.5, 0, 0);
     * const isInside = sphere.containsPoint(point); // true
     */
    containsPoint(point: Vec3): boolean;
    /**
     * Test if a ray intersects with the sphere.
     *
     * @param {Ray} ray - Ray to test against (direction must be normalized).
     * @param {Vec3} [point] - If there is an intersection, the intersection point will be copied
     * into here.
     * @returns {boolean} True if there is an intersection.
     */
    intersectsRay(ray: Ray, point?: Vec3): boolean;
    /**
     * Test if a Bounding Sphere is overlapping, enveloping, or inside this Bounding Sphere.
     *
     * @param {BoundingSphere} sphere - Bounding Sphere to test.
     * @returns {boolean} True if the Bounding Sphere is overlapping, enveloping, or inside this Bounding Sphere and false otherwise.
     */
    intersectsBoundingSphere(sphere: BoundingSphere): boolean;
}
import { Vec3 } from '../math/vec3.js';
import type { Ray } from './ray.js';