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If you died in Prize for the Reckless, which is at (11,7), and respawned in the same room, tile 59 (a solid invisible tile) would be placed at [18,9] to prevent the moving platform from going back through the quicksand. Unfortunately, the way that this kludge was added is poor. First, the conditional makes it so that it doesn't happen in ONLY (11,7). Instead of being behind a positive conditional, the tile is placed in the else-branch of an if-conditional that checks for the normal case, i.e. if the current room is NOT (11,7), thus being a negative conditional. In other words, the positive conditional is "game.roomx == 111 && game.roomy == 107". To negate it, all you would have to do is "!(game.roomx == 111 && game.roomy == 107)". However, whoever wrote this decided to go one step further, and actually DISTRIBUTE the negative into both statements. This would be fine, except if they actually got it right. You see, according to De Morgan's laws, when you distribute a negative across multiple statements you not only have to negate the statements themselves, but you have to negate all the CONJUNCTIONS, too. In other words, you have to change all "and"s into "or"s and all "or"s into "and"s. Instead of making the conditional "game.roomx != 111 || game.roomy != 107", the person who wrote this forgot to replace the "and" with an "or". Thus, it is "game.roomx != 111 && game.roomy != 107" instead. As a result, if we re-negate this and take a look at the positive conditional, i.e. the conditional that results in the else-branch executing, it turns out to be "game.roomx == 111 || game.roomy == 107". This ends up forming a cross-shape of rooms where this kludge happens. As long as your room is either on the line x=11 or on the line y=7, this kludge will execute. You can see this if you go to Boldly To Go, since it is (11,13), which is on the line x=11. Checkpoint in that room, then touch a disappearing platform, wait for it to fully disappear, then die. Then an invisible tile will be placed to the left of the spikes on the ceiling. Anyway, to fix this, it's simple. Just change the "and" in the negative conditional to an "or". The second problem was that this kludge was happening in custom levels. So I've added a map.custommode check to it. I made sure not to make the same mistake originally made, i.e. I made sure to use an "or" instead of an "and". Thus, when you re-negate the negative conditional and turn it into the positive conditional, it reads: "game.roomx == 111 && game.roomy == 107 && !map.custommode". |
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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).