/** @packageDocumentation
 * @module Geometry
 */
import { Point3d, Transform } from "@itwin/core-geometry";
/** Describes a spherical volume of space as an approximation of the shape of some more complex geometric entity fully contained within that volume.
 * When performing tests for intersection or containment, the approximation can be used as a first, quick check.
 * @see [[FrustumPlanes.computeContainment]], for example.
 * @public
 */
export declare class BoundingSphere {
    /** The point at the center of the sphere. */
    center: Point3d;
    /** The radius of the sphere. */
    radius: number;
    /** Create a new bounding sphere with the specified center and radius. */
    constructor(center?: Point3d, radius?: number);
    /** Change the center and radius of the sphere. */
    init(center: Point3d, radius: number): void;
    /** Applies the specified transformation matrix to produce a new bounding sphere.
     * @param transform The transformation matrix to apply.
     * @param result An optional preallocated object to hold the result, to avoid allocating a new object. May be the same object as `this`.
     * @returns A bounding sphere equivalent to `this` with the specified transform applied.
     */
    transformBy(transform: Transform, result?: BoundingSphere): BoundingSphere;
    /** Apply the specified transform to this bounding sphere. */
    transformInPlace(transform: Transform): void;
}
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