Block Capturing System

[Owen1212055]

Fundamental rewrite of how blocks are captured for block place event. Prioritizes vanilla behavior.

Tested Fixes:

• Bonemealing dripleaf causes broken state
• Block entities not being correct in tree placement (better fix)
• Observers detect saplings advancing their growth stage once and then they stop #6458 (better fix)
• Inventory desync & block update happening when canceling lily pad in BlockPlaceEvent #9504
• Datapack that uses setblock command unable to place one high versions of two high plants in paper and spigot #11728
• Tripwire Hook duplication bug not working on 1.21.4 PaperMC #12114
• Bonemealing saplings results in tree different than the sapling due to using shared static variable for all events #13092

any block modification in item interaction counting as block place event (no longer fired):

• Placing book in Lectern fires block place event #9759
• Log stripping is mistakenly considered as a place action #12256
• Fourth end crystal placement for respawning the ender dragon triggers BlockPlaceEvent due to regeneration of end portal #12576
• Infinite Hanging Roots Duplication via Hoe Right-Click on Rooted Dirt + BlockPlaceEvent Cancellation #13536
• Cancelling BlockDestroyEvent and BlockMultiPlaceEvent causes item duplication in certain situations #13586 (working towards)

fixes edge cases required by random block types
fixes edge cases with physics being fired on structure placement despite being canceled

big todos:

• Dispenser related stuff
• Bone meal related stuff, we need to pass more context in order to get the tree event properly working

[papermc-pr-publishing]

Last updated for: 6409d5ce9eebbce9f4445ffc0d8def95e0d01c83.

Download the Paperclip jar for this pull request: paper-13608.zip

Maven Publication

The artifacts published by this PR:

• 📦 io.papermc.paper:dev-bundle:26.1.2.local-SNAPSHOT
• 📦 io.papermc.paper:paper-api:26.1.2.local-SNAPSHOT

Repository Declaration

In order to use the artifacts published by the PR, add the following repository to your buildscript:

repositories {
    maven("https://maven-prs.papermc.io/Paper/pr13608") {
        name = "Maven for PR #13608" // https://github.com/PaperMC/Paper/pull/13608
        mavenContent {
            includeModule("io.papermc.paper", "dev-bundle")
            includeModule("io.papermc.paper", "paper-api")
        }
    }
}

[Toffikk]

Paper/paper-server/patches/features/0032-Block-Capture-System.patch

Lines 2138 to 2139 in f4074a0

	- if (!(randomSource.nextFloat() >= this.probability)) {
	+ if (!(randomSource.nextFloat() >= 1)) {

why was this change made?

[Owen1212055]

@Toffikk It was a temporary change for testing beehive behavior. 😄