colour.algebra.cartesian_to_spherical¶
- colour.algebra.cartesian_to_spherical(a: ArrayLike) numpy.ndarray[source]¶
Transform given cartesian coordinates array \(xyz\) to spherical coordinates array \(\rho\theta\phi\) (radial distance, inclination or elevation and azimuth).
- Parameters
a (ArrayLike) – Cartesian coordinates array \(xyz\) to transform.
- Returns
Spherical coordinates array \(\rho\theta\phi\), \(\rho\) is in range [0, +inf], \(\theta\) is in range [0, pi] radians, i.e. [0, 180] degrees, and \(\phi\) is in range [-pi, pi] radians, i.e. [-180, 180] degrees.
- Return type
References
[Wikipedia06a], [Wikipedia05b]
Examples
>>> a = np.array([3, 1, 6]) >>> cartesian_to_spherical(a) array([ 6.7823299..., 0.4850497..., 0.3217505...])