The single player world doesn't Load

[Minecarft102]

I tried to make a single player world, but it got stuck on one of the generating things and keeps going even when it says /0.5 it will keep going to 500.05/0.15!!!!!!!

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Related Issues

• Ender Crystal placement dosent work #316

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[Minecarft102]

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[zardoy]

@coderabbitai fix it pls feedback not clear like what do i do???

[coderabbitai]

🧩 Analysis chain

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#!/bin/bash
# Fetch issue #463 details to understand what needs to be fixed
gh issue view 463 --json title,body,labels,comments --jq '{title: .title, body: .body, labels: .labels[].name, comments: .comments[] | {author: .author.login, body: .body}}'

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#!/bin/bash
# First, verify which repository we're in
git remote get-url origin

# Search for rendering code related to Y coordinates and chunk rendering
rg -l "chunk.*render|block.*render" --type ts --type js | head -20

# Look for code handling negative Y coordinates or world height
rg -n "height|minY|maxY" --type ts --type js -g "renderer/**" | head -30

# Find the main chunk/block rendering files
fd -e ts -e js "chunk|block" renderer/

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#!/bin/bash
# Look at the worldSizeParams and how minY is used in rendering
rg -n -C5 "worldSizeParams.*minY|minY.*worldHeight" renderer/viewer/three/worldrendererThree.ts

# Check how world size params are defined
rg -n "interface.*WorldSizeParams|type.*WorldSizeParams|worldSizeParams.*=" --type ts -A5

# Look at the mesher code for world rendering
cat renderer/viewer/lib/mesher/world.ts | head -100

# Check if there are any Y coordinate constraints in chunk rendering
rg -n "< 0|<= 0|minY|MIN_Y" renderer/viewer/lib/mesher/ --type ts

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rg -n "worldSizeParams\s*=" --type ts -C3

# Look for world configuration or dimension-related code
rg -n "dimension|worldHeight|minY" src/ --type ts -g "!*.test.ts" | grep -i "world\|dimension\|height" | head -40

# Check how world data is received from the server
rg -n "bot\.on.*chunk|world.*update" src/index.ts -A5 | head -50

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rg -n "new.*WorldRenderer|WorldRenderer.*worldSize" --type ts -C3

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rg -n "bot\.game\.(height|minY|dimension)" src/ --type ts -C3

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rg -n "class.*WorldDataEmitter|worldDataEmitter" src/ --type ts -C5 | head -40

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#!/bin/bash
# Search for where worldConfig object is created with minY and worldHeight properties
rg -n "worldConfig.*minY|minY.*worldHeight|worldHeight.*minY" src/ --type ts -C5

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rg -n "emit.*loadChunk|worldEmitter\.emit" src/ --type ts -C8

# Check bot.game properties structure
rg -n "game\s*:\s*{|game\.height|game\.minY" src/mcTypes.ts -A10

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rg -n "game:" src/mcTypes.ts -A10

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# Look for where loadChunk event is emitted
rg -n "\.emit\('loadChunk'" src/ --type ts -C8

# Check for world height and minY initialization
rg -n "height.*minY|minY.*height" src/ --type ts | head -30

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#!/bin/bash
# Look at how bot.game is structured and where height/minY are set
rg -n "bot\.game" src/ --type ts | grep -E "height|minY" 

# Search for where worldConfig is created and passed to loadChunk
rg -n "loadChunk" src/worldDataEmitter.ts -C10

# Look at worldDataEmitter implementation
cat src/worldDataEmitter.ts 2>/dev/null || cat renderer/viewer/lib/worldDataEmitter.ts | head -150

# Check where bot.game properties are set in mineflayer
rg -n "game\.(height|minY)\s*=" src/ --type ts -C5

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# Check how prismarine-chunk columns get minY and worldHeight
rg -n "column\['minY'\]|column\['worldHeight'\]|column\.minY|column\.worldHeight" --type ts

# Look at the related issue #316 to understand the problem better
gh issue view 316 --json body,comments --jq '.body, .comments[].body'

# Check if bot has dimension info that we should be using
rg -n "dimension.*height|dimension.*minY|registry.*dimension" src/ --type ts | head -20

Length of output: 456

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@zardoy I found the issue! The problem is that blocks below Y=0 (like in Minecraft 1.18+) aren't rendering because the code is using outdated default world dimensions.

The Problem:
In renderer/viewer/lib/worldDataEmitter.ts around line 330, when loading chunks, the code creates:

const worldConfig = {
  minY: column['minY'] ?? 0,
  worldHeight: column['worldHeight'] ?? 256,
}

When column['minY'] and column['worldHeight'] are undefined, it defaults to the old Minecraft world dimensions (Y: 0-256). But in Minecraft 1.18+, worlds go from Y=-64 to Y=320, so blocks below Y=0 won't render!

The Fix:
You need to use bot.game.minY and bot.game.height as fallback values (I can see these are used in MinimapProvider.tsx line 186). Here's the implementation plan:

Fix blocks below Y=0 not rendering in 1.18+ worlds

Goal: Use proper world dimensions from bot.game instead of hardcoded defaults so blocks at negative Y coordinates render correctly.

Changes needed:

1. Pass bot reference to WorldDataEmitter or store dimension info
2. Update worldConfig fallback values to use bot.game properties
3. Ensure worldSizeParams gets correct minY for all 1.18+ worlds

Testing: Join a 1.18+ server and verify blocks at Y=-64 to Y=0 render correctly, and that older versions (pre-1.18) still work.

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🧠 Learnings used

Learnt from: zardoy
Repo: zardoy/minecraft-web-client PR: 373
File: renderer/viewer/three/entities.ts:1120-1120
Timestamp: 2025-06-23T13:33:14.776Z
Learning: In the minecraft-web-client project, files under renderer/ directory must not access the global `bot` variable directly according to .cursor/rules/vars-usage.mdc. The updateNameTagVisibility method in renderer/viewer/three/entities.ts currently violates this rule by accessing bot.teamMap and bot.username. Team information should be passed through entity update events from the world data emitter instead.

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