Just saw the video as well. I really have to get into coding. I would love to mod the hud to my personal liking and give it a more modern look....
(I created this from various google images)
If it is anything like the Mario 64 setup (and enough of it was in my quick scan of it) then while you are not likely to be porting it out, or doing truly crazy things then there is a lot that can be done by someone with a basic overview of what goes for coding (as in give me a basic definition of programming loop, if you use a word like hud you probably know enough terminology, can search for general programming constructions on whatever C tutorial website you care to find), have maybe made a cheat (or can follow along with the ideas espoused in
https://web.archive.org/web/20080309104350/http://etk.scener.org/?op=tutorial well enough), then basic English proficiency (things are generally named for what they are, both at file level and function call level) and maybe a choice tile editor (not sure what we are suggesting for the N64 these days but there is bound to be something on
http://www.romhacking.net/utilities/ . If you are lucky then the thing will be basic BMP/PNG or something and the build script handles things) will see you able to do some serious damage. Plenty of people that would be the first to tell you they would not even be able to do a hello world in C were having fun tweaking variables for cameras, speeds, health and much more besides, things that would take a conventional otherwise seriously skilled ROM hacker some considerable time and effort to do.
Go through the later pages of the various Mario 64 threads (
https://gbatemp.net/threads/super-mario-64-has-been-decompiled.542918/ ) for if nothing else they detail some of the things you need to get a compiler for the N64 target going on.
If and when someone does go through and see what is needed for a PC port then if it is a comparatively simple as the Mario 64 stuff ultimately became (I did have a quick scan here but nothing jumped out at me as quite as obvious/funnelled into one like the Mario 64 thing, but it was a quick scan and I am no N64 versed C coder) your changes will probably (as in unless the porters also remake all the menus to work with a mouse or something) be almost trivially remade on anything there as well in case you were afraid of that one.
On a related note then while I have not seen anything here then have any of the many Zelda hacking forums and groups elsewhere on the internet done anything like the above yet where people get to fiddle? Simple things like camera angle, camera recovery times, lock on tweaks, health stuff... that you can get.
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