Add fog

TODO.txt

@@ -2,6 +2,7 @@ fuck issue trackers :D
 
 =========== GENERAL ==============
 
+- press forward map??? :-D
 - make some kinda repo for world record runs?
 - fix the ramp map again due to new physics -- NOW it's almost good but it's
   still possible to reach the finish at first jump, try to do something about it
@@ -14,7 +15,6 @@ fuck issue trackers :D
   its velocity by a proportion of car's velocity change (this minus prev.
   frame), then offset car body by this. However we'll also have to transform
   inbetween world space and model space.
-- try to add distance fog?
 - c99 may impose limit 4095 chars on str literal, gives warning on internal
   data file, try to somehow hack around it (maybe just convert it to an array in
   the end?) Maybe this: make a standalone C file with the string in it that
@@ -39,16 +39,17 @@ fuck issue trackers :D
 
 =========== BUGS =================
 
-- After adding the non-rotating physics feature, the car now gets funny when
-  turned on the roof, once even shot to the ceiling of the map.
-- Managed to get the car stuck in non-rotating state, then after a while get
-  it back by crashing. MAY BE FIXED NOW, watch if it still happens
 - immediately after starting the map countdown seems to be lower (seems to
   perhaps be caused by nextPhysicsFrameTime, look into it)
 
 =========== HANDLED ==============
 
 - should drifting make a sound? NO NEED
+- Managed to get the car stuck in non-rotating state, then after a while get
+  it back by crashing. MAY BE FIXED NOW, watch if it still happens
+- After adding the non-rotating physics feature, the car now gets funny when
+  turned on the roof, once even shot to the ceiling of the map.
+- try to add distance fog?
 - Consider better input handling in SDL? Currently it just detects presses on
   the exact frame, so a press can be missed. But how tho? LOOKS FINE, it's
   only an issue with extremely low FPS, at which point it's unplayable anyway