Ugh, this is terrible and stupid and I hate myself for it.
Anyway, since the SDL2 VSync hint only applies when the renderer is
created, we have to re-create the renderer whenever VSync is toggled.
However, this also means we need to re-create m_screenTexture as well,
AND call ResizeScreen() after that or else the letterbox/integer modes
won't be applied.
Unfortunately, this means that in main(), gameScreen.init() will create
a renderer only to be destroyed later by graphics.processVsync().
There's not much we can do about this. Fixing this would require putting
graphics.processVsync() before gameScreen.init(). However, in order to
know whether the user has VSync set, we would have to call
game.loadstats() first, but wait, we can't, because game.loadstats()
mutates gameScreen! Gahhhhhh!!!!
@leo60228 suggested to fix that problem (
https://github.com/TerryCavanagh/VVVVVV/pull/220#issuecomment-624217939
) by adding NULL checks to game.loadstats() and then calling it twice,
but then you're trading wastefully creating a renderer only to be
destroyed, for wastefully opening and parsing unlock.vvv twice instead
of once. In either case, you're doing something twice and wasting work.
Otherwise a NO_CUSTOM_LEVELS build would fail. Also I got rid of the
'graphics.flipmode = false;' in the fixed loop because I don't think it
does anything.
This is needed for the next step. I want to put all the loop stuff in
their own functions so the code isn't one huge blob, but to do that I'll
need to make 'time' a global variable, but I can't do that because
actually 'time' is already a function, apparently, and you're only
allowed to shadow variables when already inside a function.
Like actual entities, editor ghost colors were updating every render
frame instead of logic frame. So just like actual entities, I added a
realcol attribute to them that editorrender() uses instead, and added
code to update said realcol attribute in editorlogic(). That way the
colors don't go by too quickly (especially the death color).
Just like all the other fixes, the variable that controls the amount of
ghosts to show was being updated every render frame instead of every
logic frame.
This is because due to the game loop changes in this over-30-FPS patch,
editorrender() can be called and undo graphics.backgrounddrawn being set
to false once again. Solution here is to make it so it keeps being set
to false until game.shouldreturntoeditor is turned off, which has also
been moved to editorlogic().
This is to make sure no lerping occurs in 30-FPS mode, otherwise things
might look weird. A good case that this fixes is how entities look in a
double-gotoroom (they should be completely frozen in 30-FPS mode).
There is now an option in "graphic options" named "toggle fps", which
toggles whether the game visually runs at 1000/34 FPS or over 1000/34
FPS. It is off by default.
I've had to put the entire game loop in yet another set of braces, I'll
indent it next commit.
What happens here is that the entity gets created and then gets
immediately updated on the next frame, but there's no time for their
walkingframe of 0 to be rendered, so it'll look like they have just
started with walkingframe 1. However in the delta-timestep rendering
it'll render with walkingframe 0. So we need to fix their drawframe and
increment it when creating them.
Looks like mapclass::changefinalcol() is called whenever you enter a
room in Outside Dimension VVVVVV.
mapclass::changefinalcol() changes the tile, but it doesn't update their
drawframe. So after that function is called, update their drawframe.
If you update their drawframe while inside that function, then when the
platform actually cycles color it'll cycle backwards quickly sometimes,
which is not ideal.
When I loaded the room where Vitellary is in Space Station 2, I saw this
1-frame glitch happen despite my previous efforts to prevent it. So now
it's fixed.
This is because otherwise, on my Linux system at least, the game will
take up a lot of CPU that it doesn't really need to (I only have a 60hz
monitor).
On Windows, it looks like Windows already enforces V-sync for
applications anyway, unless they have exclusive fullscreen control.
Linux doesn't enforce V-sync on apps and lets them take up as much CPU
as they want, so I'm putting this here to limit the framerate.
The game is already actually 30 FPS anyway, the nice smooth FPS is just
visual. V-sync won't introduce any more "input lag" than already exists.
By "hidden names", I'm referring to "Dimension VVVVVV" and "The Ship"
popping up on the quit/pause/teleporter screens, even though those rooms
don't have any roomnames.
Apparently my commit to fix roomname re-draw bleed on the
quit/pause/teleporter screens exposed yet another hardreset()-caused
bug. The issue here is that since hardreset() sets game.roomx and
game.roomy to 0, map.area() will no longer work properly, and since the
hidden roomname check is based on map.area(), it will no longer display
"Dimension VVVVVV" or "The Ship" once you press ACTION to quit. It used
to do this due to the re-draw bleed, but now it doesn't.
I saw that roomnames didn't get reset in hardreset(), so the solution
here is to re-factor hidden names to be an actual variable, instead of
being implicit. map.hiddenname is a variable that's set in
mapclass::loadlevel(), and if isn't empty, it will be drawn on the
quit/pause/teleporter screens. That way it will still display "Dimension
VVVVVV" and "The Ship" when you press ACTION to quit to the menu.
EDIT: Since PR #230 got merged, this commit is no longer strictly
necessary, but it's still good to refactor hidden names like this.
As much as it looks cool to have a slowly-scrolling background on the
title screen, it's quite annoying that slowmode applying on the title
screen mean that your keypresses are less responsive.
This adds Graphics::crewcolourreal(), which is like the
entityclass::crewcolour() that the editor already uses, except for the
real color instead of the color ID. Also, editorclass now has an
attribute `entcolreal` so enemy colors don't update more than 30 frames
a second.
The solution is to draw another row of incoming textures. And also just
draw another row of textures when the background needs to be redrawn,
otherwise it'll flicker when the color changes while you're holding down
ACTION.
To fix this, I draw another row/column of incoming textures. But of
course, I have to extend the size of the towerbuffer, otherwise the
incoming textures will just be gone.
This could happen if you held down ACTION in the credits, looks like the
background doesn't keep up for some reason. That's another bug to fix,
but at least I can fix this overdraw.
This is only noticeable if you have a font with translucent pixels, like
I do. But it gets really noticeable really quickly with this over-30-FPS
patch because the render functions are continuously called every
delta-timestep. To prevent this, just fill the backbuffer with black
before rendering anything.
There's still a problem in that the flickering that would lead to this
overdraw in the first place still exists. But at least if it'll flicker,
it'll flicker black and not overdraw.
Currently it interpolates it based on the current state of game.swngame,
but when game.swngame changes the interpolation doesn't know that it has
JUST changed or anything. So add a kludge variable to fix this
off-by-one.
This was especially noticeable in slowmode, where after going to an
adjacent room, it would look like they stopped for a split second. This
commit makes it so they smoothly continue their journey after switching
rooms.
The integer cast is to round off any fractional part of the velocity so
that they don't make a difference and result in the oldxp/oldyp being
one pixel off. Especially since the player's y-velocity fluctuates while
standing unflipped on the floor.
Incidentally enough, this seems to only have been a problem with screen
transitions for some reason. No other uses of gotoroom() (such as the
one where gotoroom() is called every other frame, or every frame) seem
to have resulted in this "pausing" behavior, or at least a reversion
back to 30 FPS movement. I don't know why.
Otherwise it'll go by too quickly.
Also something subtle here - I didn't make it conditional on
game.advancetext, so now it'll still decrement even if you have
advancetext up.
This makes editor notes fade out smoothly. And even though the notedelay
only gets decremented by one every editor-frame (the editor runs at
1000/24 FPS fixed-timestep here), it actually gets multiplied by 4, so a
floating-point interpolated value would make a difference here.
This is because their oldxp wasn't being updated when they move (or
rather, teleport) and wrap around the screen.
These enemies are ZZT centipedes, but they're referred to as ASCII
snakes in comments in the code.
