//astronomy/io.github.cosinekitty.astronomy/Spherical/toVectorFromHorizon
fun toVectorFromHorizon(time: Time, refraction: Refraction): Vector
Given apparent angular horizontal coordinates, calculate the unrefracted horizontal vector.
Assumes this contains apparent horizontal coordinates: lat holds the refracted altitude angle, lon holds the azimuth in degrees clockwise from north, and dist holds the distance from the observer to the object in AU.
A vector in the horizontal system: x = north, y = west, and z = zenith (up).
| time | The date and time of the observation. This is needed because the returned Vector requires a valid time value when passed to certain other functions. |
| refraction | The refraction option used to model atmospheric lensing. See refractionAngle. This specifies how refraction is to be removed from the altitude stored in this.lat. |