setFromCartesianCoords( x, y, z ) {

		this.radius = Math.sqrt( x * x + z * z );
		this.theta = Math.atan2( x, z );
		this.y = y;

		return this;

	}
Sets the cylindrical components from the given Cartesian coordinates.

@param {number} x - The x value.
@param {number} y - The x value.
@param {number} z - The x value.
@return {Cylindrical} A reference to this cylindrical.