colour.algebra.cartesian_to_cylindrical¶
- colour.algebra.cartesian_to_cylindrical(a)[source]¶
Transforms given cartesian coordinates array \(xyz\) to cylindrical coordinates array \(\rho\phi z\) (radial distance, azimuth and height).
- Parameters
a (array_like) – Cartesian coordinates array \(xyz\) to transform.
- Returns
Cylindrical coordinates array \(\rho\phi z\), \(\rho\) is in range [0, +inf], \(\phi\) is in range [-pi, pi] radians i.e. [-180, 180] degrees, \(z\) is in range [0, +inf].
- Return type
ndarray
References
[], []
Examples
>>> a = np.array([3, 1, 6]) >>> cartesian_to_cylindrical(a) array([ 3.1622776..., 0.3217505..., 6. ])