Lua video lib expansion
New video/drawer library functions for hud.add to use:
v.width() and v.height() return the screen width and height respectively (in other words you get the screen resolution), while v.renderer() returns the string for the renderer used ("software", "opengl", or "none").
Possibly add more stuff later, but for now these things at the least can be merged in next
See merge request !40
Add PlayerSpawn hook to Lua
I don't know how I did this but I did. Something about staring at code from 3AM till 5AM...
Here's a test script too:
```Lua
addHook("PlayerSpawn", function(player) player.health = 99 end)
```
See merge request !48
Version constants for Lua
Pretty simple thing. Allows scripters to use VERSION, SUBVERSION, and VERSIONSTRING to check the game's version and potentially futureproof scripts. Have tested and confirmed working on my end.
See merge request !55
BACKPORT: removal of music slots
Relevant commits cherry-picked. Basically everything except the internal music track name switches.
See merge request !43
The funny thing is you really can't see ANY change here unless you have a sloped FOF intersecting a sector floor/ceiling (and a second FOF on the other side), which has other problems anyway lol
BACKPORT: FF_ANIMATE simplistic state animations
this is a lot more complex due to the need to remove the dispoffset related code as well as a lot of the redefinitions; combined with the code changes due to the sprite2 system in internal master.
~~BEFORE ACCEPTING THIS: get sryder to look at and fix any possible brokenness with OpenGL MD2s~~
See merge request !45
Fof flag change hotfix
This fixes rendering issues caused by changing FOF flags mid-level via Lua or linedef type 445. Everything else that toggles FF_EXISTS already had this fix it turns out.
Not sure if this is safe for master too, could someone check that for me?
See merge request !53
This fixes how removing certain flags (such as FF_EXISTS) from FOFs can cause HOMs on walls bordering their target sectors. Also fixes how the force-FOF-to-vanish linedef special can leave behind the FOF's shadow
