ABCDwater — 自动落地水

English | 中文

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自动落地水

从高处坠落时自动在脚下放水，免除摔伤伤害。只需在快捷栏放一桶水，跳崖时自动触发。

功能

• 智能预测 -- 模拟下一 tick 物理运动，仅在有摔伤风险时触发
• 双重放水 -- 先俯视右键，失败则直接交互方块
• 自动回收 -- 落地后自动用空桶收回水源，桶可重复使用
• 维度适配 -- 下界自动禁用，水中不浪费桶
• 纯客户端 -- 任何服务器都能用

用法

1. JAR 放入 .minecraft/mods/
2. 快捷栏放一桶水
3. 从 =4 格高度跳下
4. 水自动放在落地点，落地后自动回收

3.5 格以下不触发，日常跳跃不干扰。

工作原理

每 tick 检测坠落状态 -> 模拟下一 tick 物理 -> 预测落地位置 -> 计算摔伤 -> 放水 -> 落地后回收。 详细流程见下方英文版。

技术细节

项目	值
模组加载器	NeoForge
Minecraft	26.1.2
Java	25
运行侧	仅客户端
依赖	无

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Auto MLG Water Clutch

A client-side NeoForge mod that automatically places water when falling, saving you from fall damage. Just keep a water bucket in your hotbar.

Features

• Smart physics prediction -- simulates next tick with gravity (0.08/tick^2) + drag
• Dual placement -- look-down right-click first, direct block interaction as fallback
• Auto recycle -- picks up the water source after landing with the empty bucket
• Dimension aware -- disabled in the Nether (water evaporates)
• Client-side only -- works on any server

Usage

1. Place the JAR in .minecraft/mods/
2. Put a water bucket in your hotbar
3. Fall from >=4 blocks height
4. Water is placed at the predicted landing position and recycled after landing

Falls under 3.5 blocks are ignored -- no wasted buckets on small drops.

How It Works

ClientTickEvent.Post ->
  |- Skip: on ground / creative / flying / elytra / in water / Nether
  |- Skip: fallDistance < 3.5
  |- Physics prediction:
  |   nextMY = (motionY - 0.08) x 0.98
  |   nextY  = currentY + nextMY
  |   check if block below nextY is solid
  |- Landing predicted? -> calculate cumulative fallDistance
  |   fallDistance > 3.5? -> clutch!
  |
  |- Method 1: useItem + look down
  |   -> ServerboundUseItemPacket (pitch=90)
  |   -> Server raytrace: eye -> ground face -> place water
  |   (fallback)
  |- Method 2: useItemOn on ground block
  |   -> ServerboundUseItemOnPacket (blockPos, Direction.UP)
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  '- Remember water position for recycling

Water Recycling

Player lands (onGround=true) ->
  |- Find empty bucket -> switch to its slot
  |- useItemOn(waterSourceBlock, Direction.UP)
  |   -> Client returns PASS (doesn't simulate bucket filling locally)
  |   -> But ServerboundUseItemOnPacket IS sent to server
  |   -> Server processes the water pickup! Bucket fills with water
  |- Check if water block is gone -> recycled!
  '- Retry for up to 40 ticks (~2 seconds)

Technical Details

Aspect	Value
Mod Loader	NeoForge
Minecraft	26.1.2
Java	25
Side	Client only
Dependencies	None
Event	ClientTickEvent.Post
API	MultiPlayerGameMode.useItem() / .useItemOn()
Protocol	ServerboundUseItemPacket / ServerboundUseItemOnPacket

Build

./gradlew build
# -> build/libs/ABCDwater-<version>.jar

Requires JDK 25+.

Release Files

File	Description
ABCDwater-<version>.jar	Mod JAR -> place in .minecraft/mods/
ABCDwater-src-<version>.zip	Source code

License

MIT