This fixes issues where they would be silent for 1 frame due to frame
ordering, resulting in a weird-sounding beginning of these tracks due to
a lack of attack (in the musical sense).
This is similar to the issue where tracks fading in would suddenly be
loud for 1 frame, again due to frame ordering.
This fixes issues with music playing, only for it to fade out
afterwards. This happened if tracks 0 or 7 were played after fading out,
because playing other tracks reset the fade booleans (by calling a
fade-in), but not tracks 0 or 7.
The previous fade system used only one variable, the amount of volume to
fade per frame. However, this variable was an integer, meaning any
decimal portion would be truncated, and would lead to a longer fade
duration than intended.
The fade per volume is calculated by doing MIX_MAX_VOLUME / (fade_ms /
game.get_timestep()). MIX_MAX_VOLUME is 128, and game.get_timestep() is
usually 34, so a 3000 millisecond fade would be calculated as 128 /
(3000 / 34). 3000 / 34 is 88.235..., but that gets truncated to 88, and
then 128 / 88 becomes 1.454545..., which then gets truncated to 1. This
essentially means 1 is added to or subtracted from the volume every
frame, and given that the max volume is 128, this means that the fade
lasts for 128 frames. Now, instead of the fade duration lasting 3
seconds, the fade now lasts for 128 frames, which is 128 * 34 / 1000 =
4.352 seconds long.
This could be fixed using floats, but when you introduce floats, you now
have 1.9999998 problems. For instance, I'm concerned about
floating-point determinism issues.
What I've done instead is switch the system to use four different
variables instead: the start volume, the end volume, the total duration,
and the duration completed so far (called the "step"). For every frame,
the game interpolates which value should be used based on the step, the
total duration, and the start and end volumes, and then adds the
timestep to the step. This way, fades will be correctly timed, and we
don't have potential determinism issues.
Doing this also fixes inaccuracies with the game timestep changing
during the fade, since the timestep is only used in the calculation
once at the beginning in the previous system.
If a track was restarted after it faded out, then it wouldn't play. This
is because currentsong wasn't set to -1 after fading out, and that is
because the fade out calls pause() instead of haltdasmusik() when it
finishes.
Unlike f196fcd896, this fixes the time
trial music while keeping it to the same behavior as 2.2, and fixes
every single possible case that this music bug could have happened.
While fixing all the other music bugs, I discovered that starting
playtesting in the editor wouldn't play the level music.
The problem is that the editor playtesting start code calls
music.fadeout() before calling music.play(). This queues up the track
from the music.play() call. After that, what should happen is that
processmusic() processes the fade, the fade is then finished, and then
after that it sees that the music is halted so it can play the queued
track.
Instead what happens is that the function first attempts to play the
music before the fade is processed and finished, so play() will re-queue
the music again, but the queue gets cleared right after that (this is a
subtle bit of behavior - it means if the game fails to play a queued
track due to it fading, it's not going to re-queue it again and end up
in some sort of infinite loop).
This is a frame ordering issue - the function is tripping over itself
when it shouldn't be. To fix it, just put the queue processing code
after the fade processing code.
This fixes the 2.2-and-below music blocking workaround not working in
2.3.
The issue was that when the music got halted by the script, the fade
volume would still be processing, silently being decremented in the
background. So the script playing the track afterwards would make the
game queue it (as it was called during the fade), but then the music is
halted so the game would attempt to play it, but the fade is STILL
happening so it wouldn't actually play it and would attempt to queue the
track again.
However, that queue gets discarded immediately afterwards because the
music.play() call happened inside the code responsible for playing the
queued music, and that code unconditionally clears the queue variables
immediately after calling play(). So that's good to know - if the game
queues a song, but fails to play it because of a fade, it's not going to
immediately re-queue it and potentially get stuck in a loop of
infinitely queueing the same song over and over again each frame.
Anyways, the source of the problem is not resetting the fade booleans
when halting music, so I've reset them.
Fixes#701.
The problem here is that even though we start playing the music when the
volume is set to zero, mixer's state doesn't have volume zero, so
whatever it plays next will be the very first quanta of the track but at
the previous volume (in this case, the maximum volume). To fix this,
just update mixer when we update the volume here - it's okay to not
account for user volume because it ends up being zero anyway.
Fixes#710.
This fixes a bug where fading music in but not going through the
music.play() path wouldn't start the fade volume from zero. If this
happened, then the previous volume would persist, and if the previous
volume was the max volume, then that essentially canceled out the
fade-in and prevented it from happening at all. But now all paths to
fadeMusicVolumeIn() set the volume to zero first, instead of only the
caller of music.play().
This is 2.2 behavior, which I forgot to keep. Otherwise, if music has
halted and you try to play the same track, it simply won't work, because
the current song is the same as the song you're trying to play. This is
what happened with the trinket scripts - the game halted music, then
tried to play the same track.
Fixes#712.
This adds <musicvolume> and <soundvolume> tags to unlock.vvv and
settings.vvv, so users' volume preferences will be persistent across
game sessions. This does not add the user interface to change them from
in-game; the next commit will do that.
So it looks like facb079b35 (PR #316) had
a few issues.
The SDL performance counter doesn't really work that well. Testing
reveals that unfocusing and focusing the game again results in
the resumemusic() script command resuming the track at the wrong time.
Even when not unfocusing the game at all, stopping a track and resuming
it resumes it at the wrong time. (Only disabling the unfocus pause fixes
this.)
Furthermore, there's also the fact that the SDL performance counter
keeps incrementing when the game is paused under GDB. So... yeah.
Instead of dealing with the SDL performance counter, I'm just going to
pause and resume the music directly (so the stopmusic() script command
just pauses the music instead). As a result, we no longer can keep
constantly calling Mix_PauseMusic() or Mix_ResumeMusic() when focused or
unfocused, so I've moved those calls to happen directly when the
relevant SDL events are received (the constant calls were originally in
VCE, and whoever added them (I'm pretty sure it was Leo) was not the
sharpest tool in the shed...).
And we are going to switch over to using our own fade system instead of
the SDL mixer fade system. In fact, we were already using our own fade
system for fadeins after collecting a trinket or a custom level
crewmate, but we were still using the mixer system for the rest. This is
an inconsistency that I am glad to correct, so we're also doing our own
fadeouts now.
There is, however, an issue with the fade system where the length it
goes for is inaccurate, because it's based on a volume-per-frame second
calculation that gets truncated. But that's an issue to fix later - at
least what I'm doing right now makes resumemusic() and musicfadein()
work better than before.
musicclass already had a resume() function for music.
These are just wrappers around the appropriate SDL_mixer functions, to
avoid direct function calls to the mixer API. So if we ever need to do
something with all callers of pausing and resuming in the future, or we
switch to a different audio backend, the work is already done for us.
Also it just looks cleaner to be calling our musicclass function instead
of doing a direct API call to the mixer.
This makes it so to reuse this code, we don't have to copy-paste it.
Additionally, I added a check for the milliseconds being 0, to avoid a
division by zero. Logically and mathematically, if the fade amount is 0
milliseconds, then that means the fade should happen instantly -
however, dividing by zero is undefined (both in math and in C/C++), so
this check needs to be added.
This fixes a bug where the resumemusic() script command would always
play MMMMMM track 15 (or, if you're using PPPPPP, just not work). This
is because musicclass::haltdasmusik() assigns resumesong AFTER calling
Mix_HaltMusic(), but the songend() callback fires before the resumesong
assignment, meaning resumesong gets set to -1 instead of whatever
currentsong was previously.
To fix this, just move the assignment into the callback itself (I don't
know why this wasn't done before). I could have moved it to before the
Mix_HaltMusic() call, but moving it into the callback itself fixes it
for all cases of the music stopping (such as when the music fades out).
Apparently in C, if you have `void test();`, it's completely okay to do
`test(2);`. The function will take in the argument, but just discard it
and throw it away. It's like a trash can, and a rude one at that. If you
declare it like `void test(void);`, this is prevented.
This is not a problem in C++ - doing `void test();` and `test(2);` is
guaranteed to result in a compile error (this also means that right now,
at least in all `.cpp` files, nobody is ever calling a void parameter
function with arguments and having their arguments be thrown away).
However, we may not be using C++ in the future, so I just want to lay
down the precedent that if a function takes in no arguments, you must
explicitly declare it as such.
I would've added `-Wstrict-prototypes`, but it produces an annoying
warning message saying it doesn't work in C++ mode if you're compiling
in C++ mode. So it can be added later.
Just like I refactored text splitting to no longer use std::vectors,
std::strings, or temporary heap allocations, decreasing memory usage and
improving performance; there's no reason to use a temporary
heap-allocated std::vector to grab all extra binary blob indices, when
instead the iteration can just be more immediate.
Instead, what I've done is replaced binaryBlob::getExtra() with
binaryBlob::nextExtra(), which takes in a pointer to an index variable,
and will increment the index variable until it reaches an extra track.
After the caller processes the extra track, it is the caller's
responsibility to increment the variable again before passing it back to
getExtra().
This avoids all heap allocations and brings down the memory usage of
processing extra tracks.
Since musicWriteBlob is a temporary object that gets destroyed at the
end of musicclass::init(), in order to make sure we don't leak memory
and lose all the pointers to the blocks we just allocated in
musicWriteBlob, we need to call its clear() method after writing
BinaryMusic.vvv.
musicReadBlob was used for both MMMMMM and PPPPPP soundtracks. This
causes a memory leak if you have mmmmmm.vvv installed, because the
pointers holding each allocated block of MMMMMM would be lost when
PPPPPP got loaded. Valgrind complains about this memory leak.
This is in contrast to 2.2 and previous behavior, where musicReadBlob
was only a temporary object instead of being held in musicclass.
However, this wasn't really a memory leak (moreso something that just
didn't get cleaned up when closing the game), but it did get turned into
a leak when per-level assets mounting and unmounting got introduced in
2.3 (loading a level with custom assets after starting the game with an
mmmmmm.vvv, or exiting out of a level that had an mmmmmm.vvv, would
cause the game to leak memory). Leo recognized this, and moved
musicReadBlob onto musicclass in a separate 2.3 PR, but either he didn't
think about what was happening here too closely, or he didn't use
Valgrind, because he forgot about the memory leak caused by re-using the
same binaryBlob for PPPPPP and MMMMMM.
So instead, just use two different binaryBlob objects for MMMMMM and
PPPPPP. That way, no memory leaks happen.
I'm going to introduce another binaryBlob object in to the mix, and I
want to be able to re-use an existing FOREACH_TRACK #define without
having to copy-paste it again. So, TRACK_NAMES now takes in a blob
parameter, which will be passed to the temporary FOREACH_TRACK #define.
This removes the music cleanup code from musicclass::init(), and
requires that we also call destroy() in Graphics::reloadresources().
This is because we'll need to re-use the musicclass cleanup code
elsewhere, and we don't want to copy-paste the cleanup code. Or at
least, I don't (but I'm not a game dev, game devs copy-paste all the
friggin' time).
This patch cleans up unnecessary exports from header files (there were
only a few), as well as adds the static keyword to all symbols that
aren't exported and are specific to a file. This helps the linker out in
not doing any unnecessary work, speeding it up and avoiding silent
symbol conflicts (otherwise two symbols with the same name (and
type/signature in C++) would quietly resolve as okay by the linker).
With commit 48313169b6 (PR #453),
AllyTally added a single-case patch for a regression, instead of fixing
it at its root cause.
In fact, that commit only fixes the music if Presenting VVVVVV is
playing while exiting to the menu, not if you enter a level that plays
Presenting VVVVVV - so it only fixes it going one way, and not going the
other way around; neither fixing also all the other cases this could
happen.
It doesn't, say, fix the case where you are exited to the menu
automatically after collecting the last crewmate in the level (or if the
level calls gamestate 1013 itself), which is what happens in my MIRA-VIU
TAS video at the end, and which I noted in the description of that video
( https://www.youtube.com/watch?v=OYQO4ePbYW4&t=111 ).
So, the problem here is that when musicclass::play() is called, it sees
that currentsong is the same as its input, and decides that since the
music is already playing, it shouldn't play the music again. Thus, the
music fades out, and we get silence instead of the music playing again.
But I said this was a regression. Why didn't this happen in 2.2? Well,
it's because of the fact that 2.2 sets currentsong to -1 (no music
playing at all) immediately when starting a fadeout, and not when the
fadeout completes (commit facb079b35,
PR #316). As you can imagine, this discrepancy could lead to bugs, given
that the game would think that music wasn't playing when in actuality it
was, but fixing this bug could also break code that expected this wrong
behavior. And in this case, it has.
So to properly fix the root cause of this, instead of naïvely
single-case patching out every case that comes up randomly, in
musicclass::play(), the function will now ignore if the input given is
the same as currentsong if the music is currently fading out.
This is also another conditional where the rest of the function is
nested. Furthermore, in order to not repeat ourselves, I've also decided
to unconditionally assign currentsong to t, because if t is -1
currentsong gets assigned to -1 anyway - so it's the same thing, but
it's much easier to see and think about.
This removes an indentation level, and makes it easier to reason about
the function since you essentially now view it as the function returning
right there.
When exiting a level, music.init() gets called again, and every time it
gets called after the first time it gets called, it will free all music
tracks.
To do so, it calls Mix_FreeMusic(). Unfortunately, if there is music
fading, Mix_FreeMusic() will call SDL_Delay(), which will result in
annoying no-draw frames. Meaning, the screen freezes and doesn't draw
anything, and has to wait a bit before continuing.
Here's the relevant piece of code from SDL2_mixer's music.c:
if (music == music_playing) {
/* Wait for any fade out to finish */
while (music->fading == MIX_FADING_OUT) {
Mix_UnlockAudio();
SDL_Delay(100);
Mix_LockAudio();
}
if (music == music_playing) {
music_internal_halt();
}
}
This is especially annoying if you're a TASer, because no-draw frames in
a libTAS movie aren't guaranteed to last for a consistent number of
frames when you change your inputs around.
After this patch, as long as your computer can unmount and re-mount
assets fast enough (it doesn't seem like mine can, unfortunately), then
you won't get any freezes when exiting a level that has custom assets.
(This freeze didn't happen when loading a level because the title screen
music fadeout upon pressing ACTION had enough time to fully complete
before the level got loaded.)
For some reason, music.usingmmmmmm automatically gets set to true in
musicclass::init(). I assume this was because it would get re-assigned
by game.usingmmmmmm in the game startup code anyway, but now that
musicclass::init() can be called more than once, this variable will just
get set to true when it shouldn't be, causing a confusing desync just
like the one I described in my previous commit, where you would have
PPPPPP or MMMMMM on the title screen, but closing the game and
re-launching it would play the other soundtrack instead.
Again, these duplicate variables should be removed, but that's going to
be a separate patch. In the meantime, I'm removing this variable
assignment.
musicclass::init() re-initializes every attribute of musicclass
unnecessarily, when initialization should be put in a constructor
instead. This is bad, because music.init() gets called whenever we enter
and exit a custom level that has assets.
Otherwise, this would result in a bug where music.usingmmmmmm would be
reset, causing you to revert to PPPPPP on the title screen whenever you
enter a level with MMMMMM selected and exit it.
This also causes a confusing desync between game.usingmmmmmm and
music.usingmmmmmm since the values of the two variables are now
different (these duplicate variables should probably be removed, too,
and a lot of other duplicate variables like these exist, too, which are
a real headache). Which means despite MMMMMM playing on the title
screen, exiting the game and re-launching it will play PPPPPP instead.
What's even more is that going to game options and switching to PPPPPP
will play PPPPPP, but afterwards launching and re-entering will play
MMMMMM. Again, having duplicate variables is very bad, and should
probably be fixed, but that's a separate patch.
First, the variable has been inverted, because it's bad practice to have
booleans with negative names. Secondly, instead of magically setting a
signaling variable when calling fadeout(), fadeout() now has a parameter
to set the quick_fade attribute, which is much cleaner than doing the
magical assignment that could potentially look unrelated.
fadeoutqueuesong basically does the same thing as nicechange - they both
queue a song to be played when the current track is done fading out.
Except, for some reason, I decided to add fadeoutqueuesong instead of
using the existing nicechange/nicefade system.
This has consequences where fadeoutqueuesong would step on the toes of
nicechange. In the case of #390, nicechange would say "let's play
Potential for Anything" when entering the Super Gravitron, but
fadeoutqueuesong had previously said "let's play Pipe Dream" because of
the player having just exited the Super Gravitron. fadeoutqueuesong took
priority because it came first in musicclass::processfade(), and when it
called play(), the Mix_PlayingMusic() in the nicechange check afterwards
would say music would already be playing at that point, so the
nicechange wouldn't take effect.
In the end, the solution is to just merge the new system into the
already-existing system.
Fixes#390.
Just looked over this and had to do a double-take. It should be
num_mmmmmm_tracks, not num_pppppp_tracks, because MMMMMM comes first in
the vector of music tracks.
In C++, when you have two variables in different scopes with the same
name, the inner scope wins. Except you have to be really careful because
sometimes they're not (#507). So it's better to just always have unique
variable names and make sure to never clash a name with a variable in an
outer scope - after all, the C++ compiler and standard might be fine
with it, but that doesn't mean humans can't make mistakes reading or
writing it.
Usually I just renamed the inner variables, but for tx/ty in editor.cpp,
I just got rid of the ridiculous overcomplicated modulo calculations and
replaced them with actual simple modulo calculations, because the
existing ones were just ridiculous. Actually, somebody ought to find
every instance of the overcomplicated modulos and replace them with the
actual good ones, because it's really stupid, quite frankly...
Previously, setting the actual volume of the music was all over the
place. Which isn't bad, but when I added being able to press N to mute
the music specifically, I should've made it so that there would be a
volume variable somewhere that the game looks at if the music is
unmuted, and otherwise sets the actual volume to 0 if the game is muted.
This resulted in things like #400 and #505 and having to add a bunch of
special-cased checks like game.musicmuted and game.completestop. But
instead of adding a bunch of special-case code, just make it so there's
a central place where Mix_VolumeMusic() actually gets called, and if
some piece of code wants to set the music volume, they can set
music.musicVolume. But the music handling logic in main.cpp gets the
final say on whether to listen to music.musicVolume, or to mute the game
entirely.
This is how the music handling code should have been from the start
(when pressing N to mute the music was added).
Fixes#505.
The value of the macro might not change in the future, but it's there
for a reason. That reason being to improve code readability, because
otherwise 128 would just be a magic number that plopped in out of
nowhere. Sometimes the game uses MIX_MAX_VOLUME, other times it uses
128, so to be consistent I'm just going to enforce MIX_MAX_VOLUME
entirely.
This reverts commit cf5ad166e3.
My implementation will make it so single-case patches like this commit
won't be necessary anymore (there's no need to add a special-case check
for game.musicmuted, the way that I'm gonna do it). In fact, it's better
if I just revert the commit entirely.
By "unnecessary qualifiers to self", I mean something like using the
'game.' qualifier for a variable on the Game class when you're inside a
function on the Game class itself. This patch is to enforce consistency
as most of the code doesn't have these unnecessary qualifiers.
To prevent further unnecessary qualifiers to self, I made it so the
extern in each header file can be omitted by using a define. That way,
if someone writes something referring to 'game.' on a Game function,
there will be a compile error.
However, if you really need to have a reference to the global name, and
you're within the same .cpp file as the implementation of that object,
you can just do the extern at the function-level. A good example of this
is editorinput()/editorrender()/editorlogic() in editor.cpp. In my
opinion, they should probably be split off into their own separate file
because editor.cpp is getting way too big, but this will do for now.
This is because if they are manually written out, they are more likely
to contain mistakes.
In fact, after further review, there are several functions with
incorrect manually-written bounds checks:
* entityclass::entitycollide()
* entityclass::removeentity()
* entityclass::removeblock()
* entityclass::copylinecross()
* entityclass::revertlinecross()
All of those functions forgot to do 'greater than or equal to' instead
of 'greater than' when comparing against the size of the vector. So they
were erroneous. But they are now fixed.
Since there's an INBOUNDS_ARR() macro, it's much better to specify the
macro for the vector is a macro for the vector, to avoid confusion.
All usages of this macro have been renamed accordingly.
Previously, it was assuming that the number of PPPPPP/MMMMMM tracks
would always be 16, since if that wasn't the case... then the game would
rudely and abruptly segfault when attempting to load the file. Huh.
But now that the game properly deals with invalid headers, it's possible
for the number of tracks to be 0. So I'll need to remove this
assumption.
It's possible that musicReadBlob.getIndex() could return the sentinel
value of -1 in case the header with that name is invalid, in which case
we should simply not do anything. Otherwise it'll lead to segfaults. I
opted to do the full bounds check just to be safe, too.
For further safety, I hardcoded the max number of headers, 128, less, so
128 is copy-pasted less and in the future if it needs to be changed
it'll only have to be changed in one place.
Okay, so basically here's the include layout that this game now
consistently uses:
[The "main" header file, if any (e.g. Graphics.h for Graphics.cpp)]
[blank line]
[All system includes, such as tinyxml2/physfs/utfcpp/SDL]
[blank line]
[All project includes, such as Game.h/Entity.h/etc.]
And if applicable, another blank line, and then some special-case
include screwy stuff (take a look at editor.cpp or FileSystemUtils.cpp,
for example, they have ifdefs and defines with their includes).
Including a header file inside another header file means a bunch of
files are going to be unnecessarily recompiled whenever that inner
header file is changed. So I minimized the amount of header files
included in a header file, and only included the ones that were
necessary (system includes don't count, I'm only talking about includes
from within this project). Then the includes are only in the .cpp files
themselves.
This also minimizes problems such as a NO_CUSTOM_LEVELS build failing
because some file depended on an include that got included in editor.h,
which is another benefit of removing unnecessary includes from header
files.
I ran the game through cppcheck and it spat out a bunch of member
attributes that weren't being initialized. So I initialized them.
In the previous version of this commit, I added constructors to
GraphicsResources, otherlevelclass, labclass, warpclass, and finalclass,
but flibit says this changes the code flow enough that it's risky to
merge before 2.4, so I got rid of those constructors, too.
It seems like they were unfinished. This commit makes them properly
work.
When a track is stopped with stopmusic() or musicfadeout(),
resumemusic() will resume from where the track stopped. musicfadein()
does the same but does it with a gradual fade instead of suddenly
playing it at full volume.
I changed several interfaces around for this. First, setting currentsong
to -1 when music is stopped is handled in the hook callback that gets
called by SDL_mixer whenever the music stops. Otherwise, it'd be
problematic if currentsong was set to -1 when the song starts fading out
instead of when the song actually ends.
Also, music.play() has a few optional arguments now, to reduce the
copying-and-pasting of music code.
Lastly, we have to roll our own tracker of music length by using
SDL_GetPerformanceCounter(), because there's no way to get the music
position if a song fades out. (We could implicitly keep the music
position if we abruptly stopped the song using Mix_PauseMusic(), and
resume it using Mix_ResumeMusic(), but ignoring the fact that those two
functions are also used on the unfocus-pause (which, as it turns out, is
basically a non-issue because the unfocus-pause can use some other
functions), there's no equivalent for fading out, i.e. there's no
"fade out and pause when it fully fades out" function in SDL_mixer.) And
then we have to account for the unfocus-pause in our manual tracker.
Other than that, these commands are now fully functional.
Continuing from #280, another potential source of out-of-bounds indexing
(and thus, Undefined Behavior badness) comes from script commands. A
majority of them don't do any input validation at all, which means the
potential for out-of-bounds indexing and segfaulting in custom levels.
So it's always good to add bounds checks to them.
Interesting note, the only existing command that has bounds checks is
the flag() command. That means you can't turn out-of-bounds flags on or
off. But there's no bounds checks for ifflag(), or customifflag(), which
means you CAN index out-of-bounds with those commands! That's a bit bad
to do, so.
Also, I decided to add the bounds checks for playef() at the
musicclass::playef() level, instead of just the level of the playef()
command. I don't know of any other cases outside of the command where
musicclass::playef() will index out of bounds, but musicclass is the one
containing the indexed vector anyway, I wanted to cover more cases, and
it's better to be safe than sorry.
It is an exact duplicate of musicclass::haltdasmusik(), so use that
function instead and update callers. Looks like
musicclass::haltdasmusik() came first, anyway (musicclass::stopmusic()
was only used in editor.cpp).
Looks like musicfade is an unused variable, anyway. I might remove it,
but I have some plans in the future that involve repairing what it was
intended for, so I'll hold off on removing it (and some other unused
variables in Music.cpp) for now.
As discussed earlier, some custom levels have taken advantage of the
fact that songs 0 and 7 loop and also fade in when using PPPPPP while
having an mmmmmm.vvv file present.
Previously, when MMMMMM is installed but the user is using PPPPPP, niceplay would still restart the song even if it's the same. That has been fixed. In addition, Plenary and Path Complete no longer loop when MMMMMM is installed but PPPPPP is in use.
This commit makes `help`, `graphics`, `music`, `game`, `key`, `map`, and
`obj` essentially static global objects that can be used everywhere.
This is useful in case we ever need to add a new function in the future,
so we don't have to bother with passing a new argument in which means we
have to pass a new argument in to the function that calls that function
which means having to pass a new argument into the function that calls
THAT function, etc. which is a real headache when working on fan mods of
the source code.
Note that this changes NONE of the existing function signatures, it
merely just makes those variables accessible everywhere in the same way
`script` and `ed` are.
Also note that some classes had to be initialized after the filesystem
was initialized, but C++ would keep initializing them before the
filesystem got initialized, because I *had* to put them at the top of
`main.cpp`, or else they wouldn't be global variables.
The only way to work around this was to use entityclass's initialization
style (which I'm pretty sure entityclass of all things doesn't need to
be initialized this way), where you actually initialize the class in an
`init()` function, and so then you do `graphics.init()` after the
filesystem initialization, AFTER doing `Graphics graphics` up at the
top.
I've had to do this for `graphics` (but only because its child
GraphicsResources `grphx` needs to be initialized this way), `music`,
and `game`. I don't think this will affect anything. Other than that,
`help`, `key`, and `map` are still using the C++-intended method of
having ClassName::ClassName() functions.
Earlier in 53950e14de65a54d9369c5183a16337782d3dc4e, I made playing a
song while a song was already fading quickly fade out the current song,
but then added an exception for if the fade came from the musicfadeout()
command. This commit adds another exception for if the fade came from
niceplay(), since otherwise the music transitions between areas in the
game would go too quick.
