Implements the SDL Game Controller API, haptics, and axis bindings.

Update Windows SDL files to version 2.0.20

See merge request STJr/SRB2!1775

Make CA_SLOWFALL Account for Scale

See merge request !1806

Improve multiple MF2_LINKDRAW objects in Software

See merge request STJr/SRB2!1843

Fix Pterabyte spawns (+ behavior tweaks)

See merge request STJr/SRB2!1839

Uncapped Water Ripples

See merge request !1868

Fixed folder mods

Closes #889

See merge request !1820

Fix slope planes not being able to render fog (fixes #664)

Closes #664

See merge request !1637

Various changes to emblem drawing (menu changes only)

See merge request !1810

Gravity flip bugfixes & additions

Closes #378, #661, and #430

See merge request STJr/SRB2!1808

Only interpolate shadowcasters if they exist

Closes #899

See merge request !1864

Remove mobj interpolator only after thinker

See merge request !1863

Fix use-after-frees around mobjs

Closes #909

See merge request !1866

X.organic authored 2 years ago and Eidolon committed 2 years ago

# Conflicts:
#	src/k_kart.c
#	src/p_enemy.c
#	src/p_mobj.c
#	src/p_saveg.c
#	src/p_tick.c

Don't sleep w/ fpscap 0 and vsync enabled

See merge request !1865

Multiple objects with MF2_LINKDRAW will get sorted between each other, instead of purely done with dispoffset.

Fix splat interp and sprite angle

See merge request !1858

Ensure st_time does not exceed 2.0

Closes #901

See merge request !1862

Start bustable FOF sounds at the correct height

Closes #846

See merge request !1818

Prevent floating crumbling platforms from being triggered twice

Closes #797 and #594

See merge request !1817

Fix a crash when scrolling away from a save file with a negative lives count.

See merge request !1822

Cut inner walls of splat FOFs

Closes #891

See merge request !1829

Fix hidden 100% completion reward actually being obtained at 50% completion

See merge request !1842

Fix addon menu down arrow weirdness + allow looping from top to bottom and vise versa

Closes #829

See merge request !1848

Merge master into next

See merge request !1861