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Apache License
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# Dynmap — NeoForge 1.21.1 Port
# Dynmap — NeoForge 1.21.1
Port of [Dynmap](https://github.com/webbukkit/dynmap) to **NeoForge 21.1.219 / Minecraft 1.21.1**.
A [NeoForge](https://neoforged.net/) port of [Dynmap](https://github.com/webbukkit/dynmap),
the dynamic web-map mod for Minecraft servers. Dynmap renders your worlds as a live,
Google-Maps-style view that anyone can open in a browser — no Minecraft client required —
with real-time player positions, markers, and multiple render perspectives.
This standalone build is used for deployment on an ATM10 server. The goal is to eventually submit this as a PR back to the upstream `webbukkit/dynmap` repository.
This branch targets **NeoForge 21.1.219 / Minecraft 1.21.1**. It is a fork of upstream
Dynmap's `neoforge` module, updated for the 1.21.1 API. It has been run on both vanilla
NeoForge and large modpacks (e.g. All the Mods 10, ~445 mods).
- **Upstream:** https://github.com/webbukkit/dynmap (branch: `neoforge`)
- **Fork (for PR):** https://github.com/your-fork/dynmap
- **Git host (this repo):** `Sulkta/dynmap-neoforge`, branch `neoforge-1.21.1`
## Features
---
- Live, browser-based map of every loaded world — served by a built-in web server (default port `8123`).
- Multiple render styles (top-down flat, isometric "HD" perspective, cave/biome maps).
- Real-time player tracking, chat balloons, and a marker/area API for other mods and plugins.
- Flat-file or SQL (MySQL / MariaDB / PostgreSQL / SQLite) tile storage.
- Self-contained: `DynmapCore` is bundled into the mod jar, so there are no extra runtime dependencies.
## Requirements
- A NeoForge **1.21.1** (21.1.x) server.
- **JDK 21** to build from source.
## Building
Requires Java 21 and Docker (build container: `dynmap-build`).
The build uses the Gradle wrapper, so no local Gradle install is needed:
```bash
# Inside build container
cd /workspace
./gradlew shadowJar --no-daemon
./gradlew shadowJar
```
Output: `build/libs/Dynmap-neoforge-1.21.1-3.7-SNAPSHOT-Dev-all.jar`
The output fat jar is written to:
### Memory notes
- Gradle daemon heap: capped at `-Xmx2g` (see `gradle.properties`)
- forked javac: capped at `-Xmx3g` (see `build.gradle`)
- Without these caps, JVM defaults to 25% of host RAM — causes OOM on high-RAM hosts
---
## Changes from upstream `neoforge-1.20.6`
See [CHANGES.md](./CHANGES.md) for the full changelog.
---
## Test status
| Environment | Result |
|---|---|
| Vanilla NeoForge 1.21.1 (clean server) | ✅ Passes |
| ATM10 5.5 (445 mods, NeoForge 21.1.219) | ✅ Passes |
---
## Deployment
Copy the fat jar into the server's `mods/` directory. Remove any old `Dynmap*.jar` first.
```bash
docker cp build/libs/Dynmap-neoforge-1.21.1-3.7-SNAPSHOT-Dev-all.jar <container>:/data/mods/
```
build/libs/Dynmap-neoforge-1.21.1-3.7-SNAPSHOT-Dev-all.jar
```
> **Note:** Always remove old jars before copying a new one. The container data volume may retain old versions.
`shadowJar` bundles `DynmapCore` into the jar; build the plain `jar` task only if you are
supplying `DynmapCore` separately.
---
## Installing
## Containers (internal, self-hosted)
1. Stop your server.
2. Remove any existing `Dynmap*.jar` from the server's `mods/` directory.
3. Copy the freshly built fat jar into `mods/`.
4. Start the server. On first run Dynmap creates its config under
`<server>/dynmap/` and begins rendering.
| Container | Purpose | Ports |
|---|---|---|
| `dynmap-build` | Gradle build environment | — |
| `vanilla-test` | Vanilla NeoForge 1.21.1 test server | 25566 (MC), 8124 (web) |
| `modpack-test` | ATM10 5.5 test server, 445 mods | — |
| `production` (prod) | **Production ATM10 — DO NOT TOUCH** | — |
## Using the map
---
Once the server is up, open the web map in any browser:
## PR Plan
```
http://<server-address>:8123/
```
Once ATM10 testing is confirmed:
1. Mirror all changes to upstream tree (`upstream/neoforge-1.21.1/`)
2. Push to `your-fork/dynmap` fork on GitHub
3. Open PR: `your-fork/dynmap:neoforge-1.21.1` → `webbukkit/dynmap:neoforge`
The bind address and port are configurable in `dynmap/configuration.txt`
(`webserver-bindaddress`, `webserver-port`). See the
[upstream Dynmap documentation](https://github.com/webbukkit/dynmap/wiki) for the full
set of configuration, render, and storage options — they apply unchanged to this port.
PR description draft is in [DYNMAP.md](https://github.com/your-fork/dynmap).
## Compatibility notes
This port includes fixes specific to running under 1.21.1 and large modpacks — most
notably a work-around for a block-state cache deadlock that can occur with ModernFix +
FerriteCore during world load. The full, dated list of changes relative to the upstream
`neoforge-1.20.6` baseline is in [CHANGES.md](./CHANGES.md).
## Relationship to upstream
This is a community fork that exists to track the NeoForge 1.21.1 target ahead of an
upstream release. The long-term goal is to fold these changes back into
[webbukkit/dynmap](https://github.com/webbukkit/dynmap). If you want the canonical,
multi-platform Dynmap (Spigot/Paper, Forge, Fabric, and older NeoForge versions), use
upstream.
## Contributing
Issues and pull requests are welcome. To keep merges back to upstream clean, please:
- Match the surrounding code style; avoid cosmetic-only refactors in functional PRs.
- Build and run a server with your change before submitting (`./gradlew shadowJar`, then load the jar).
- Describe what you changed and why, and note the Minecraft / NeoForge versions you tested against.
## License
Licensed under the Apache License 2.0 — see [LICENSE](./LICENSE). Dynmap is a trademark of
its respective owners; this fork is not affiliated with or endorsed by the upstream
maintainers.