The main ones to beware of here are entityclass::updateentities(),
entityclass::updateentitylogic(), and entityclass::entitymapcollision().
They would index out-of-bounds and thus commit Undefined Behavior if the
entity was removed in entityclass::updateentities(). And it would've
been fine enough if I only added bounds checks to those functions.
However, I decided to be a bit more defensive and play it safe, and
added bounds checks to ALL functions taking in not only an entity
indice, but also blocks and linecrosskludge indices.
Otherwise, if you died after entering a room with a horizontal or
vertical warp background (but not the all-sides warp background), the
warp background would be the first thing you see when going to the Game
Over screen, and would then start scrolling downwards with the proper
tower background coming in from the top.
This oversight seems to have always been in the game.
Was No Death Mode actually tested? Like, did anyone ever play through
the entire game without dying in the Warp Zone, or even AFTER completing
the Warp Zone, like, ever?
When you complete the game, you're now redirected to the play menu. This
is because your quicksave will have been deleted so you can't go back to
the summary menu.
When you complete a custom level, you'll go back to the levels list, in
case you started the level from a quicksave.
Looks like there wasn't a custommode check for the spawning of crewmates
based on which crewmates were rescued, but now there is.
This has gone undiscovered for a long time, mostly because people don't
use the rescued() internal command.
While I was working on my over-30-FPS patch, I found out that the tower
background in the credits scroll was being completely re-drawn every
single frame, which was a bit wasteful and expensive. It's also harder
to interpolate for my over-30-FPS patch. I'm guessing this constant
re-draw was done because the math to get the surface scroll properly
working is a bit subtle, but I've figured the precise math out!
The first changes of this patch is just removing the unconditional
`map.tdrawback = true;`, and having to set `map.scrolldir` everywhere to
get the credits scrolling in the right direction but make sure the title
screen doesn't start scrolling like a descending tower, too.
After that, the first problem is that it looks like the ACTION press to
speed up the credits scrolling doesn't speed up the background, too. No
problem, just shove a `!game.press_action` check in
`gamecompletelogic()`.
However, this introduces a mini-problem, which is that NOW when you hold
down ACTION, the background appears to be slowly getting out of sync
with the credits text by a one-pixel-per-second difference. This is
actually due to the fact that, as a result of me adding the conditional,
`map.bscroll` is no longer always unconditionally getting set to 1,
while `game.creditposition` IS always unconditionally getting
decremented by 1. And when you hold down ACTION, `game.creditposition`
gets decremented by 6.
Thus, I need to set `map.bscroll` when holding down ACTION to be 7,
which is 6 plus 1.
Then we have another problem, which is that the incoming textures desync
when you press ACTION, and when you release ACTION. They desync by
precisely 6 pixels, which should be a familiar number. I (eventually)
tracked this down to `map.bypos` being updated at the same time
`map.bscroll` is, even though `map.bypos` should be updated a frame
later AFTER updating `map.bscroll`.
So I had to change the `map.bypos` update in `gamecompleteinput()` and
`gamecompletelogic()` to be `map.bypos += map.bscroll;` and then place
it before any `map.bscroll` update, thus ensuring that `map.bscroll`
updates exactly one frame before `map.ypos` does. I had to move the
`map.bypos += map.bscroll;` to be in `gamecompleteinput()`, because
`gamecompleteinput()` comes first before `gamecompletelogic()` in the
`main.cpp` game loop, otherwise the `map.bypos` update won't be delayed
by one frame for when you press ACTION to make it go faster, and thus
cause a desync when you press ACTION.
Oh and then after that, I had to make the descending tower background
draw a THIRD row of incoming tiles, otherwise you could see some black
flickering at the bottom of the screen when you held down ACTION.
All of this took me way too long to figure out, but now the credits
scroll works perfectly while being more optimized.
I had forgotten that the game flashed and did screen-shaking when you
pressed ACTION to quicksave.
While testing for my over-30-FPS patch I stumbled across this.
It's less code being copied and pasted, especially since for my
over-30-FPS patch I would have to make a separate function for each if
both of them were still there, but if they're unified into one then I
will only have to make one more function.
And since map.scrolldir is now used outside of GAMEMODE, we'll need to
reset it in hardreset() and when exiting playtesting.
Due to the previous commit, the descending tower background now has to
account for map.bscroll, or else it will be off by one pixel from the
incoming textures. But ascending tower backgrounds work fine, so no need
to do anything with those.
Looks like this was done as a quick fix instead of taking the time to
figure out the math needed to actually draw the incoming textures, which
is fair enough - it only makes one room, Panic Room, slightly laggier.
While I was working on my over-30-FPS patch, though, I came across the
fact that this background kept getting entirely redrawn every frame, and
it seems like it would be easier to interpolate descending tower
backgrounds if we scrolled what was already there instead.
Here, we have to draw two rows of incoming textures, otherwise the
scrolling surface will produce black lines.
Previously, if you had backgrounds disabled in accessibility options,
and went to the editor and opened up the editor menu, it would be drawn
straight on top of what was already there in the editor instead of being
drawn on top of black. So now it's drawn on top of black.
I want exiting No Death Mode to go back to the "play modes" menu, not to
the "start game" menu, because it's too far back. Also do the same if
you either die or complete No Death Mode.
Also I initialized Game::wasinintermission, probably a good thing to
initialize variables.
During testing, I made a cursed level that set the flash timer to
precisely 1,000,000 frames. It turns out that if I activated the timer
in playtesting, exited playtesting, and exited the editor without ever
re-entering playtesting, the timer still kept going. So to prevent being
able to do that, we should hardreset() when exiting the editor.
In-game because that's where screen effects are used the most. But on
the title screen, screen effects are used when you press ACTION to start
the game, and when you enable screen effects, too.
Otherwise, we don't need screen effects for any other game-gamestate.
This de-duplicates the screen effects rendering code by putting it
inside a function, Graphics::renderwithscreeneffects(), and using that
instead of copy-pasted code.
The code to decrement the timers for flashing and shaking is now handled
outside the game-gamestate case-switch, instead of having to be
duplicated inside each render function.
As a bonus, I made it so the timer decrements even if screen effects are
disabled. This is to prevent any theoretical situation where the timer
can "pile up" due to disabled screen effects not letting it tick down.
This removes a lot of duplicate code, which towerrender() mostly
consisted of, even though the only difference is that it draws a
separate map and screen edge spikes are drawn.
This removes lots of duplicated code that drawtowerentities() did,
because all that really changed was accounting for map.ypos (which can
be done conditionally) and where and when the room wrapped (which can
also be done conditionally).
This fixes an oddity that's only visual, which could only happen in
custom levels by using the createentity() internal command.
For the same reason that the second through fourth tiles of moving
platforms on the top and left was buggily rendered, SDL_BlitSurface()
strikes again to mutate the SDL_Rect we pass it and render the next
SDL_BlitSurface() call inbounds, even though we don't need it to.
Previously, the game could end up rendering a warping sprite twice due
to the fact that it could run "if entity is on the right side of the
screen" right after "if entity is on the left side of the screen" (but
not the other way around). This is most noticeable if you have a custom
player sprite with translucent pixels and stand on the left side of a
warping screen, but the code suggests it happens when warping through
the top of the screen, too.
Instead of doing
if (!obj.entities[i].invis)
{
...
}
It's better to do
if (obj.entities[i].invis)
{
continue;
}
...
It reduces the indentation by one level, which is always a good thing.
In the last commit, I removed having the flip mode conditional directly
inside the sprite-drawing code for each size type, which would reduce
the indentation one level. However, I opted to hold off un-indenting
until this commit, otherwise it would've produced too much noise.
The game uses flipsprites.png instead of sprites.png when in flip mode,
mostly to add exceptions for sprites that SHOULDN'T be flipped in flip
mode.
Looks like to achieve this, the routines for sprite drawing got
copy-and-pasted every single time flipsprites.png needed to be
conditionally used, resulting in large amounts of copy-pasted code. And
this copy-pasted code resulted in copy-paste errors, with relating to
VVVVVV-Man, because apparently due to two copy-pasting errors, the
combined giant crewmate in the epilogue uses flipsprites.png even if you
aren't in flip mode, and it also uses the width instead of the height of
sprites_rect when in flip mode (although, this doesn't end up mattering,
but still).
The solution here is to simply change the referenced sprites vector to a
pointer that can conditionally change based on the game being in flip
mode or not.
Looks like I forgot to test that my music silencing patch didn't break
the music being silent during the "You have found a shiny trinket" and
"You have found a shiny crewmate" text boxes. So I've added a check for
game.completestop in the music handling in main.cpp.
Found this bug while I was testing my towerlogic/gamelogic merge patch.
The problem here is that we're directly using the C stdio library,
instead of using PHYSFS's stuff. So I've added a function
FILESYSTEM_delete() that does exactly that.
This commit fixes a slightly frustrating thing where if you start a new
game, and then exit before saving, "start game" will always take you to
a new game, even though you have unlocked things like the Secret Lab or
Time Trials.
Now, if you select "new game" (only possible if you have something
unlocked), then quit before saving, "start game" will still take you to
the play menu, but "continue" is replaced with "start" and "new game" is
gone.
This will be a useful shorthand to ask "do we have the Secret Lab, or
any Time Trial, or Intermission replays, or No Death Mode, or Flip Mode
unlocked?"
This fixes being able to rack up a large amount of stack frames by
pressing Esc repeatedly in the editor, which would be a problem if you
were to then return to the main menu afterwards.
Instead, if Menu::ed_settings is already in the stack, the game will
simply return to that menu instead of creating it. Else, it will just
create the menu.
Also, as extra attention to detail, I made sure that the menu create or
return only happens if Esc opens the settings menu, and not when Esc is
closes it.
This stabilizes the code that handles the menu that you land on if you
press Esc and quit to the menu.
Instead of using Game::returnmenu(), we now use the new function
Game::returntomenu() to clearly express intent that we want to return to
a specific menu. So I've added another kludge variable
Game::wasinintermission for the was-in-intermission case.
Also, I made it so that if you didn't have a main game telesave or
quicksave, you just get brought back to the main menu. Because you
shouldn't be able to go to the play menu without a quicksave or
telesave.
When exiting from a game-gamestate which may have been entered through a
varying amount of menus, the solution is to not use Game::returnmenu(),
and to instead have a way to go back to a certain given menu.
This commit fixes a bug where the second, third, and fourth tiles of
moving platforms would render offset from the first tile if the moving
platform hit the top or left edge of the screen.
This is due to the fact that SDL_BlitSurface() will end up changing the
coordinates of the rectangle we pass to it to be 0 if they're negative,
but only after it's already been drawn. Previously, we kept re-using the
same rectangle each time we drew each segment of the moving platform,
but since it only changes the draw rectangle after it's already been
drawn, the first tile shows up fine, but not the rest of the tiles,
hence resulting in an offset.
To fix this, we do the same thing as we did for drawing the "really big
sprite" (size-type 9): just reset the rectangle we use every time we
draw a segment of the moving platform.
They're literally the exact same thing, except one is 4 and the other
has an 8. No need to have all that copy-pasted code.
Actually, the only other difference was that size-type 8 set the
drawRect to sprites_rect instead of tiles_rect for some reason? Even
though it doesn't matter, anyway, because SDL_BlitSurface() only cares
about the X and Y you pass it, not the width and height, which is the
only difference between tiles_rect and sprites_rect.
To make sure that people wouldn't wonder where size-type 8 went if they
saw a blank space between size-type 7 and size-type 9, I kept the
size-type 8 conditional, but inside it is just a comment telling you to
go to size-type 2.
Instead of copy-pasting all the BlitSurfaceStandard()s all over again,
just make the referenced vector a pointer that changes depending on
map.custommode.
There's a noticeable seam in the horizontal and warp backgrounds
whenever you enter a new room. Entering a new room triggers the game to
re-draw the entire warp background instead of simply scrolling what it
already has. This seam is the result of the initial background draw
being misaligned with the rest of the scrolling.
If you get out your measuring tools, you'll see that it's misaligned by
exactly 3 pixels (this applies to both horizontal and vertical warping).
If you look at the part of the code where the game draws fresh warping
textures after scrolling the existing ones offscreen, you'll see it
starts with an offset of 317, which is exactly 320 minus 3. And for
vertical, it uses 237, which is exactly 240 minus 3.
This is where the misalignment comes from. Since the incoming textures
are drawn 3 pixels to the left, but the initial draw isn't, this results
in a misalignment and causes the seam.
To fix this, draw the initial draw of the horizontal and vertical warp
backgrounds 3 pixels to the left.
It looks like one bracket got out-of-place for whatever reason. This
doesn't affect the case-switch at all, due to how case-switches work,
but it's still weird to look at.
Indentation has been updated accordingly.
Some custom levels have their own custom music and sync that music to
scripted cutscenes, which is actually pretty impressive. However,
they've always run into a small thorn, which is that you can easily
desync the music by unfocusing the game, because the audio will keep
playing when the game is unfocused.
This should remove that thorn by pausing the audio on unfocus, and
resuming when focused, so that the music can no longer desync, but you
can still pause the game by unfocusing it.
This is yet another feature in VCE that hasn't been upstreamed until
now.
