colour.algebra.cartesian_to_polar#
- colour.algebra.cartesian_to_polar(a: ArrayLike) NDArrayFloat [source]#
Transform given cartesian coordinates array \(xy\) to polar coordinates array \(\rho\phi\) (radial coordinate, angular coordinate).
- Parameters:
a (ArrayLike) – Cartesian coordinates array \(xy\) to transform.
- Returns:
Polar coordinates array \(\rho\phi\), \(\rho\) is in range [0, +inf], \(\phi\) is in range [-pi, pi] radians, i.e., [-180, 180] degrees.
- Return type:
References
[Wikipedia06a], [Wikipedia05e]
Examples
>>> a = np.array([3, 1]) >>> cartesian_to_polar(a) array([ 3.1622776..., 0.3217505...])