colour.algebra.cartesian_to_spherical

colour.algebra.cartesian_to_spherical(a)[source]

Transforms given Cartesian coordinates array \(xyz\) to Spherical coordinates array \(\rho\theta\phi\) (radial distance, inclination or elevation and azimuth).

Parameters

a (array_like) – Cartesian coordinates array \(xyz\) to transform.

Returns

Spherical coordinates array \(\rho\theta\phi\).

Return type

ndarray

References

[Wik06a], [Wik05b]

Examples

>>> a = np.array([3, 1, 6])
>>> cartesian_to_spherical(a)  
array([ 6.7823299...,  1.0857465...,  0.3217505...])