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3bc3b59378
VVVVVV/desktop_version
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Misa 3bc3b59378 Re-fix glitchy y-position when spawning onto a conveyor 
This is a re-do of 942217f871 (#509), but
with a more conservative fix that only resets the player's newxp and
newyp when they respawn from a checkpoint or spawn in to the map.

Unlike the previous patch, if the player were to suddenly collide with a
conveyor or horizontally-moving platform during gameplay, their
y-position would revert back to the intended next y-position of the
previous frame. But this is the same behavior as before, I haven't ever
seen such a contrived situation come up, and this behavior is probably
more preferable for gameplay than actually going to the conveyor, so
it's fine.

I also decided to reset newxp here, and not just newyp, because while
resetting newyp seems to be enough, it's safer to also reset newxp (and
so future readers won't question why only newyp is reset but not newxp).

I tested this and it once again fixes the death loop issue from earlier,
while also still allowing for that Trench Warfare trick to be possible
(I tested it with the libTAS movie I mentioned in #606; it syncs fine).
There are no other known regressions resulting from this fix
(hopefully).
2021-02-01 19:51:55 -05:00
..
src Re-fix glitchy y-position when spawning onto a conveyor 2021-02-01 19:51:55 -05:00
.dockerignore Run CI on CentOS 7 (#574) 2021-01-11 00:30:15 -05:00
.gitignore Don't recompile all files when the commit hash is changed 2020-12-25 20:17:01 -05:00
CMakeLists.txt Remove LODEPNG_NO_COMPILE_ZLIB 2021-01-14 06:31:30 -05:00
CONTRIBUTORS.txt Fix entities in the Warp Zone's gray tileset not being gray in the editor (#480) 2020-09-25 13:35:03 -04:00
Dockerfile Run CI on CentOS 7 (#574) 2021-01-11 00:30:15 -05:00
README.md Add note to README about "compiler quirks" only applying to 2.2 2020-06-21 20:51:04 -04:00
version.cmake Update commit hash every time it changes, not just when CMake is re-ran 2020-12-26 00:15:47 -05:00

README.md

How to Build

VVVVVV's official desktop versions are built with the following environments:

  • Windows: Visual Studio 2010
  • macOS: Xcode CLT, currently targeting 10.9 SDK
  • GNU/Linux: CentOS 7

The engine depends solely on SDL2 and SDL2_mixer. All other dependencies are statically linked into the engine. The development libraries for Windows can be downloaded from their respective websites, Linux developers can find the dev libraries from their respective repositories, and macOS developers should compile and install from source (including libogg/libvorbis/libvorbisfile).

Steamworks support is included and the DLL is loaded dynamically, you do not need the SDK headers and there is no special Steam or non-Steam version. The current implementation has been tested with Steamworks SDK v1.46.

To generate the projects on Windows:

# Put your SDL2/SDL2_mixer folders somewhere nice!
mkdir flibitBuild
cd flibitBuild
cmake -G "Visual Studio 10 2010" .. -DSDL2_INCLUDE_DIRS="C:\SDL2-2.0.10\include;C:\SDL2_mixer-2.0.4\include" -DSDL2_LIBRARIES="C:\SDL2-2.0.10\lib\x86\SDL2;C:\SDL2-2.0.10\lib\x86\SDL2main;C:\SDL2_mixer-2.0.4\lib\x86\SDL2_mixer"

Note that on some systems, the SDL2_LIBRARIES list on Windows may need SDL2/SDL2main/SDL2_mixer to have .lib at the end of them. The reason for this inconsistency is unknown.

To generate everywhere else:

mkdir flibitBuild
cd flibitBuild
cmake ..

macOS may be fussy about the SDK version. How to fix this is up to the whims of however Apple wants to make CMAKE_OSX_SYSROOT annoying to configure and retain each time Xcode updates.

Including data.zip

You'll need the data.zip file from VVVVVV to actually run the game! It's available to download separately for free in the Make and Play edition of the game. Put this file next to your executable and the game should run.

This is intended for personal use only - our license doesn't allow you to actually distribute this data.zip file with your own forks without getting permission from us first. See LICENSE.md for more details. (If you've got a project in mind that requires distributing this file, get in touch!)

A Word About Compiler Quirks

(Note: This section only applies to version 2.2 of the source code, which is the initial commit of this repository. Since then, much hard work has been put in to fix many undefined behaviors. If you're compiling the latest version of the source code, ignore this section.)

This engine is super fussy about optimization levels and runtime checks. In particular, the Windows version absolutely positively must be compiled in Debug mode, with /RTC enabled. If you build in Release mode, or have /RTC disabled, the game behaves dramatically different in ways that were never fully documented (bizarre softlocks, out-of-bounds issues that don't show up in tools like Valgrind, stuff like that). There are lots of things about this old code that could be cleaned up, polished, rewritten, and so on, but this is the one that will probably bite you the hardest when setting up your own build, regardless of platform.

We hope you'll enjoy messing with the source anyway!

Love, flibit