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Removing the player entity has all sorts of nasty effects, such as softlocking the game because many inputs require there to be a player present, such as opening the quit menu. The most infamous glitch to remove the player entity is the Gravitron Fling, where the game doesn't see a gravity line at a specific y-position in the current room, and when it moves the bottom gravity line it moves the player instead. When the gravity line gets outside the room, it gets destroyed, so if the player gets dragged outside the room, they get destroyed, too. (Don't misinterpret this as saying anytime the player gets dragged outside the room, they get destroyed - it's only the Gravitron logic that destroys them.) Also, there are many places in the code that use entity-getting functions that have a fallback value of 0. If it was possible to remove the player, then it's possible for this fallback value of 0 to index obj.entities out-of-bounds, which is not good. To fix this, entityclass::removeentity() is now a bool that signifies if the entity was successfully removed or not. If the entity given is the player (meaning it first checks if it's rule 0, just so in 99% of cases it'll short-circuit and won't do the next check, which is if entityclass::getplayer() says the indice to be removed is the player), then it'll refuse to remove the entity, and return false. This is a change in behavior where callers might expect entityclass::removeentity() to always succeed, so I changed the removeentity_iter() macro to only decrement if removing the entity succeeded. I also changed entityclass::updateentities() from 'removeentity(i); return true;' to 'return removeentity(i);'. |
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This is the source code to VVVVVV, version 2.0+. For more context about this release, see the announcement on Terry's blog!
License
VVVVVV's source code is made available under a custom license. See LICENSE.md for more details.
In general, if you're interested in creating something that falls outside the license terms, get in touch with Terry and we'll talk about it!
Authors
- Created by Terry Cavanagh
- Room Names by Bennett Foddy
- Music by Magnus Pålsson
- Metal Soundtrack by FamilyJules
- 2.0 Update (C++ Port) by Simon Roth
- 2.2 Update (SDL2/PhysicsFS/Steamworks port) by Ethan Lee
- Beta Testing by Sam Kaplan and Pauli Kohberger
- Ending Picture by Pauli Kohberger
Versions
There are two versions of the VVVVVV source code available - the desktop version (based on the C++ port, and currently live on Steam), and the mobile version (based on a fork of the original flash source code, and currently live on iOS and Android).