constructor(radius = 1, theta = 0, y = 0) {
			this.radius = radius; // distance from the origin to a point in the x-z plane

			this.theta = theta; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis

			this.y = y; // height above the x-z plane

			return this;
		}
Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system