I'm starting to implement the ability to define
up to 8 distinct points in the sky as "stars"
that will be allowed as a `body` parameter to
some Astronomy Engine functions, to be determined.
Instead of declaring all the "body" parameters in the
TypeScript/JavaScript code to be strings, I created a
string-valued enumerated type called Body.
The same string values can still be passed in from JavaScript
code, or callers can use syntax like Astronomy.Body.Moon.
This improves the type checking inside the TypeScript source,
plus it adds better documentation for each of the parameters.
In the generated Markdown documentation, the user can click
on the Body type and see all the supported bodies.
The other three supported languages (C, C#, Python)
already use enumerated types for bodies, so this
brings the JavaScript version more in sync with them.
In the TypeScript/JavaScript code, the functions MakeObserver and MakeSpherical
are no longer needed, because the classes Observer and Spherical are now exported,
along with their constructors. I deleted those functions and reworked callers
to use the equivalent constructors instead.
Also fixed a few breakages in the html/browser examples that crept in recently.
I had to require('./astronomy.js') instead of require('astronomy.js')
to get the nodejs demos working, now that I maintain a redundant
copy of astronomy.js in the demo directories.
Windows does not support relative links in Git by default.
This broke the first-time experience for Windows users.
From now on I will maintain copies of the astronomy.js
and astronomy.py in the demo folders, so that the demos
will work on Windows immediately after cloning the repo.
Can now calculate the heliocentric Solar System Barycenter (SSB)
and Earth/Moon Barycenter (EMB).
Changes made in C, C#, JavaScript and Python:
Added new body codes SSB, EMB.
Added support for calculating both in HelioVector functions.
Verified that all calculations match NOVAS.
Verified that all calculations match each other across languages.
