A sphere defined by a center and radius.

[page:Vector3 center] - center of the sphere. Default is a [page:Vector3] at (0, 0, 0).

[page:Float radius] - radius of the sphere. Default is -1.

Creates a new [name].

A [page:Vector3] defining the center of the sphere. Default is (0, 0, 0).

The radius of the sphere. Default is 0.

[page:Matrix4 matrix] - the [Page:Matrix4] to apply

Transforms this sphere with the provided [page:Matrix4].

[page:Vector3 point] - [page:Vector3] The point to clamp.

[page:Vector3 target] — the result will be copied into this Vector3.

Clamps a point within the sphere. If the point is outside the sphere, it will clamp it to the
closest point on the edge of the sphere. Points already inside the sphere will not be affected.

Returns a new sphere with the same [page:.center center] and [page:.radius radius] as this one.

[page:Vector3 point] - the [page:Vector3] to be checked

Checks to see if the sphere contains the provided [page:Vector3 point] inclusive of the
surface of the sphere.

Copies the values of the passed sphere's [page:.center center] and [page:.radius radius] properties to this sphere.

Returns the closest distance from the boundary of the sphere to the [page:Vector3 point]. If the sphere contains the point, the distance will be negative.

Checks to see if the sphere is empty (the radius set to a negative number).

Spheres with a radius of 0 contain only their center point and are not considered to be empty.

Makes the sphere empty by setting [page:.center center] to (0, 0, 0) and [page:.radius radius] to -1.

Checks to see if the two spheres' centers and radii are equal.

[page:Box3 target] — the result will be copied into this Box3.

Returns a[link:https://en.wikipedia.org/wiki/Minimum_bounding_box Minimum Bounding Box] for the sphere.

[page:Box3 box] - [page:Box3] to check for intersection against.

Determines whether or not this sphere intersects a given [page:Box3 box].

[page:Plane plane] - Plane to check for intersection against.

Determines whether or not this sphere intersects a given [page:Plane plane].

[page:Sphere sphere] - Sphere to check for intersection against.

Checks to see if two spheres intersect.

[page:Vector3 center] - center of the sphere.

[page:Float radius] - radius of the sphere.

Sets the [page:.center center] and [page:.radius radius] properties of this sphere.

Please note that this method only copies the values from the given center.

[page:Array points] - an [page:Array] of [page:Vector3] positions.

[page:Vector3 optionalCenter] - Optional [page:Vector3] position for the sphere's center.

Computes the minimum bounding sphere for an array of [page:Array points]. If [page:Vector3 optionalCenter]is given,
it is used as the sphere's center. Otherwise, the center of the axis-aligned bounding box encompassing
[page:Array points] is calculated.

Translate the sphere's center by the provided offset [page:Vector3].

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]