A point's [link:https://en.wikipedia.org/wiki/Cylindrical_coordinate_system cylindrical coordinates].
[page:Float radius] - distance from the origin to a point in the x-z plane.
Default is `1.0`.
[page:Float theta] - counterclockwise angle in the x-z plane measured in radians
from the positive z-axis. Default is `0`.
[page:Float y] - height above the x-z plane. Default is `0`.
Returns a new cylindrical with the same [page:.radius radius], [page:.theta theta] and [page:.y y] properties as this one.
Copies the values of the passed Cylindrical's [page:.radius radius], [page:.theta theta] and [page:.y y] properties to this cylindrical.
Sets values of this cylindrical's [page:.radius radius], [page:.theta theta] and [page:.y y] properties.
Sets values of this cylindrical's [page:.radius radius], [page:.theta theta] and [page:.y y] properties from the [page:Vector3 Vector3].
Sets values of this cylindrical's [page:.radius radius], [page:.theta theta] and [page:.y y] properties from Cartesian coordinates.
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]