comnum.owc_direction

comnum.owc_direction(elevation_rad, azimuth_rad)

The unit vector of elevation elevation_rad (positive up) and azimuth azimuth_rad (from the x axis, towards y).

Parameters:

• elevation_rad (float) – the elevation (rad), -π/2 pointing down.

• azimuth_rad (float) – the azimuth (rad).

Returns:

(3,) (float64).

Return type:

numpy.ndarray

Examples

>>> import comnum, numpy as np
>>> bool(np.allclose(comnum.owc_direction(-np.pi / 2, 0.0), [0, 0, -1]))
True