intersectsSphere( sphere ) {

		const radiusSum = this.radius + sphere.radius;

		return sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );

	}
Returns `true` if this sphere intersects with the given one.

@param {Sphere} sphere - The sphere to test.
@return {boolean} Whether this sphere intersects with the given one or not.