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PaperMC/LICENSE.md
Bjarne Koll d0dcd7d251
Fix incorrect invulnerability damage reduction ()
Fixes incorrect spigot handling of the invulnerability damage
reduction applied when an already invulnerable entity is damaged with a
larger damage amount than the initial damage.
Vanilla still damages entities even if invulnerable if the damage to be
applied is larger than the previous damage taken. In that case, vanilla
applies the difference between the previous damage taken and the
proposed damage.

Spigot's damage modifier API takes over the computation of damage
reducing effects, however spigot invokes this handling with the initial
damage before computing the difference to the previous damage amount.
This leads to the reduction values to generally be larger than expected,
as they are computed on the not-yet-reduced value.
Spigot applies these reductions after calling the EntityDamageEvent and
*then* subtracts the previous damage point, leading to the final damage
amount being smaller than expected.

This patch cannot simply call the EntityDamageEvent with the reduced
damage, as that would lead to EntityDamageEvent#getDamage() returning
the already reduced damage, which breaks its method contract.
Instead, this patch makes use of the DamageModifier API, implementing
the last-damage-reduction as a DamageModifier.
2024-11-19 11:54:58 +01:00

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Paper inherits its licensing from upstream projects.
As such, Paper is licensed under the
[GNU General Public License version 3](licenses/GPL.md); as it inherits it from Spigot,
who in turn inherits it from the original Bukkit and Craftbukkit projects.
Any author who is _not_ listed below should be presumed to have released their work
under the original [GPL](licenses/GPL.md) license.
In the interest of promoting a better Minecraft platform for everyone, contributors
may choose to release their code under the more permissive [MIT License](licenses/MIT.md).
The authors listed below have chosen to release their code under that more permissive
[MIT License](licenses/MIT.md). Any contributor who wants their name added below
should submit a pull request to this project to add their name.
```text
Zach Brown <zach.brown@destroystokyo.com>
Daniel Ennis <aikar@aikar.co>
kashike <kashike@vq.lc>
Black Hole <black-hole@live.com>
Mark Vainomaa <mikroskeem@mikroskeem.eu>
Mystiflow <mystiflow@gmail.com>
Shane Freeder <theboyetronic@gmail.com>
Gabscap <git@gabscap.de>
Jadon Fowler <jadonflower@gmail.com>
chickeneer <emcchickeneer@gmail.com>
Minecrell <minecrell@minecrell.net>
Techcable <Techcable@outlook.com>
BillyGalbreath <blake.galbreath@gmail.com>
MiniDigger <admin@benndorf.dev>
Brokkonaut <hannos17@gmx.de>
vemacs <d@nkmem.es>
stonar96 <minecraft.stonar96@gmail.com>
Hugo Manrique <hugmanrique@gmail.com>
willies952002 <admin@domnian.com>
MicleBrick <miclebrick@outlook.com>
Trigary <trigary0@gmail.com>
rickyboy320 <rickw320@hotmail.com>
DoNotSpamPls <7570108+DoNotSpamPls@users.noreply.github.com>
JRoy <joshroy126@gmail.com>
ysl3000 <yannicklamprecht@live.de>
Machine_Maker <machine@machinemaker.me>
Ivan Pekov <ivan@mrivanplays.com>
Camotoy <20743703+Camotoy@users.noreply.github.com>
Bjarne Koll <git@lynxplay.dev>
MeFisto94 <MeFisto94@users.noreply.github.com>
Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
LemonCaramel <admin@caramel.moe>
Noah van der Aa <ndvdaa@gmail.com>
Doc <nachito94@msn.com>
Nick Hensel <nickhensel25@icloud.com>
vytskalt <vytskalt@protonmail.com>
TheFruxz <cedricspitzer@outlook.de>
Kieran Wallbanks <kieran.wallbanks@gmail.com>
Denery <dorofeevij@gmail.com>
Jakubk15 <jakubk15@protonmail.com>
Redned <redned235@gmail.com>
Luke Chambers <consolelogluke@gmail.com>
Emily <emilia.lopezf.1999@gmail.com>
dawon <dawon@dawon.eu>
Ollie <69084614+olijeffers0n@users.noreply.github.com>
Oliwier Miodun <naczs@blueflow.pl>
aerulion <aerulion@gmail.com>
Lukas Planz <lukas.planz@web.de>
granny <contact@granny.dev>
mja00 <me@mja00.dev>
```