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+Hytale Gravity Flip
+
+
+ Builder-friendly anti-gravity zones for Hytale servers.
+ Define a region with a wand, name it, walk on the ceiling — no code, no restarts.
+
+
+
+ 
+ 
+ 
+ 
+ 
+
+
+---
+
+## Showcase
+
+
+
+
+ 
+
+
+
+Click to watch on YouTube
+
+### Screenshots
+
+
+
+---
+
+## Features
+
+- **Builder-first workflow** — define regions entirely in-game with a custom wand. No config editing required for the common case.
+- **Six subcommands** — `wand`, `define`, `list`, `delete`, `toggle`, `tp`.
+- **Per-UUID wand selection store** — each builder owns their own pair of corners; survives rejoin.
+- **Persistent regions** — every zone serialised to `regions.json`, reloaded on boot via the Hytale `Config` API.
+- **Two visualization modes** — `Outline` (AABB wireframe) and `Particles` (volumetric emitters on edges) with configurable color, opacity, refresh rate, and density. `None` for production.
+- **Per-entity affect toggles** — target players only, items only, NPCs only, or any combination.
+- **Configurable physics** — `VerticalForce` (lift strength) and `GracePeriodMs` (smooth entry transition) per region.
+- **Optional fall-damage immunity** — suppress fall damage when leaving a zone so demos don't hurt.
+- **Tick-loop detection** — efficient AABB containment check each tick (~100 ms), scales to dozens of active regions.
+- **First-run bootstrap** — the plugin auto-seeds a demo region on first boot so the mechanic works out of the box.
+
+---
+
+## Quick Start
+
+1. **Install** — drop `hytale-gravity-flip-.jar` into `/Server/mods/` and start the server.
+2. **Get the wand** — run `/gravityflip wand` in-game. You receive the *Gravity Flip Wand* item.
+3. **Pick two corners** — primary-click block A (pos1), secondary-click block B (pos2).
+4. **Name the region** — `/gravityflip define my_zone`. Gravity inverts inside the box immediately.
+5. **Fly up. Congratulations.**
+
+---
+
+## User Guide
+
+### Commands
+
+All commands are sub-commands of `/gravityflip`.
+
+| Command | Description | Example |
+| ----------------------------------- | -------------------------------------------------------------------------------------------- | -------------------------------- |
+| `/gravityflip wand` | Gives the caller a *Gravity Flip Wand* item. | `/gravityflip wand` |
+| `/gravityflip define ` | Creates a region from the caller's current wand selection (both corners required). | `/gravityflip define arena` |
+| `/gravityflip list` | Prints every registered region with its AABB coordinates and enabled state. | `/gravityflip list` |
+| `/gravityflip delete ` | Removes a region from disk and memory. | `/gravityflip delete arena` |
+| `/gravityflip toggle ` | Enables or disables a region without deleting its config. | `/gravityflip toggle arena` |
+| `/gravityflip tp ` | Teleports the caller to the center of a region (handy for large or hidden zones). | `/gravityflip tp arena` |
+
+### The Wand
+
+The *Gravity Flip Wand* is a custom item registered through Hytale's item asset pack and `Interaction.CODEC`.
+
+- **Primary click** on a block → sets **pos1** (min corner candidate).
+- **Secondary click** on a block → sets **pos2** (max corner candidate).
+- Selection is stored **per player UUID** in an in-memory `WandSelectionStore`. Rejoining the server preserves the selection for the session.
+- Once both corners are set, `/gravityflip define ` normalizes them into an axis-aligned `Box(min, max)` and persists the region.
+
+### Region Anatomy
+
+Every region is serialised to `regions.json` via `GravityFlipRegion.CODEC`. Only `Name` and `Box` are mandatory; every other field has a sensible default and can be omitted.
+
+| Field | Type | Default | Description |
+| ----------------------- | --------- | --------------- | ------------------------------------------------------------------------------------------------ |
+| `Name` | string | *(required)* | Unique region identifier used by commands. |
+| `Box` | AABB | *(required)* | Axis-aligned box `{ "min": [x,y,z], "max": [x,y,z] }`. Min must be component-wise ≤ Max. |
+| `Enabled` | boolean | `true` | If `false`, the region is persisted but dormant (no detection, no visualization). |
+| `FallDamage` | boolean | `false` | If `true`, vanilla fall damage is preserved. `false` suppresses fall damage on exit. |
+| `GracePeriodMs` | integer | `2500` | Smooth entry transition window (ms). `0` = instant flip. |
+| `VerticalForce` | double | `0.1` | Upward force applied per tick. Gentle lift ≈ `0.05`. Launch pad ≈ `0.3`. |
+| `AffectPlayers` | boolean | `true` | Flip players inside the region. |
+| `AffectNpcs` | boolean | `true` | Flip NPCs / mobs inside the region. |
+| `AffectItems` | boolean | `true` | Flip dropped items inside the region. |
+| `VisualColor` | string | `#00FFFF` | Hex color for the outline / particle tint. |
+| `VisualMode` | string | `Outline` | One of `Outline`, `Particles`, `None`. |
+| `VisualRefreshMs` | integer | `1000` | How often the visualization is re-emitted (ms). Lower = smoother, heavier. |
+| `VisualOpacity` | double | `0.5` | Overlay opacity, `0.0`–`1.0`. |
+| `VisualParticleId` | string | `Torch_Fire` | Hytale particle asset id used in `Particles` mode. `Dust_Sparkles_Fine` is invisible in-world. |
+| `VisualParticleDensity` | double | `0.3` | Particles per edge unit. `1.0` saturates; `0.1` is sparse. |
+
+### Visual Modes
+
+- **`Outline`** — colored AABB wireframe, refreshed every `VisualRefreshMs`. Best for builders and debugging.
+- **`Particles`** — particle emitters along the box edges, density and id configurable. Best for gameplay / showcase.
+- **`None`** — region is invisible. Use in production once builders are done.
+
+### Configuration File
+
+The region file lives at `/Server/mods/Mythlane_GravityFlip/regions.json` and is written by the plugin whenever a command mutates the registry.
+
+- **Hot-reload:** not currently exposed as a subcommand — restart the server (or reload the plugin host) after hand-edits.
+- **Auto-save contract:** command handlers save immediately after mutations. External edits must restart.
+- **First-run:** if `regions.json` is empty/missing, the plugin seeds one showcase region (`demo-gravity-flip`, box `(0,100,0)..(10,120,10)`, particles on).
+
+---
+
+## Showcase Regions
+
+A set of curated regions ships with the dev server's `regions.json`. They collectively exercise every plugin capability. Spawn is `(0, 81, 0)` on a superflat surface.
+
+| Region | Min | Max | What it demonstrates |
+| -------------------------- | ---------------- | ----------------- | --------------------------------------------------------------- |
+| `tutorial_walk_on_ceiling` | (10, 81, 10) | (15, 86, 15) | Baseline player-only flip with cyan outline. |
+| `item_fountain` | (20, 80, 10) | (23, 100, 13) | Tall vertical zone, items only — drop stuff and watch it rise. |
+| `mob_chamber` | (30, 81, 10) | (40, 89, 20) | NPC-only flip with red outline. |
+| `full_chaos` | (-15, 81, 10) | (0, 91, 25) | Players + NPCs + items, purple particles. |
+| `gentle_lift` | (-40, 80, -20) | (-20, 85, 0) | Soft `VerticalForce=0.05` — slow drift. |
+| `strong_launch` | (-15, 80, -15) | (-10, 83, -10) | Aggressive `VerticalForce=0.3` — launch pad. |
+| `grace_period_demo` | (15, 81, -20) | (23, 87, -12) | `GracePeriodMs=5000` — smooth fade-in. |
+| `no_grace` | (25, 81, -20) | (33, 87, -12) | `GracePeriodMs=0` — instant flip, side-by-side comparison. |
+| `fall_damage_off` | (40, 110, 0) | (50, 120, 10) | Elevated zone with `FallDamage=false` — safe exit. |
+| `disabled_example` | (-30, 81, 0) | (-25, 86, 5) | `Enabled=false` — persisted but inert, proves state handling. |
+| `showcase_arena` | (-80, 81, -80) | (-50, 96, -50) | 30×15×30 gold-outlined arena — hero shot for video. |
+| `dense_particles` | (50, 81, 50) | (58, 89, 58) | `VisualParticleDensity=1.0` — maxed visual saturation. |
+
+---
+
+## Installation
+
+```bash
+# 1. Build the plugin jar
+./gradlew clean shadowJar
+
+# 2. Copy the fat-jar into your Hytale server's mods folder
+cp build/libs/hytale-gravity-flip-*.jar "/Server/mods/"
+
+# 3. (Re)start the server — the plugin auto-registers its item, interaction, and tick loop.
+```
+
+On first boot the plugin creates `Server/mods/Mythlane_GravityFlip/regions.json` and seeds a demo region. Edit in-game via commands, or hand-edit the file and restart.
+
+---
+
+## Development
+
+### Prerequisites
+
+- **JDK 25** (toolchain enforced by Gradle).
+- **Hytale Plugin API** — pulled from `https://maven.hytale.com/release` as `com.hypixel.hytale:Server`. Version pinned via `hytaleServerVersion` in `gradle.properties`.
+- A local Hytale dev server (for the optional `copyJarToDevServer` deploy task).
+
+### Project Structure
+
+```
+src/main/java/com/mythlane/gravityflip/
+ GravityFlipPlugin.java # Entry point (setup / start / shutdown lifecycle)
+ command/ # /gravityflip root + 6 sub-commands
+ config/ # GravityFlipConfig — persisted region list codec
+ region/ # GravityFlipRegion, RegionRegistry, RegionSnapshot
+ wand/ # WandSelectionStore + Interaction (CODEC-registered)
+ tick/ # RegionTickLoop — per-tick AABB detection
+ physics/ # GravityApplier, FallDamageGuard, FallDamageSuppressorSystem
+ viz/ # RegionVisualizer + ParticleEdgeEmitter
+src/main/resources/
+ manifest.json # Hytale plugin manifest (filtered by processResources)
+ Server/Item/Items/
+ gravityflip_wand.json # Custom wand item asset
+ Server/Interaction/RootInteractions/
+ gravityflip_wand_root.json # Wand root interaction definition
+src/test/java/... # JUnit 5 unit tests (pure-data stores, codec round-trips)
+docs/screenshots/ # Portfolio assets
+```
+
+### Build
+
+```bash
+# Fat-jar (shadow) with gson relocated to com.mythlane.gravityflip.libs.gson
+./gradlew clean shadowJar
+
+# Run tests
+./gradlew test
+
+# Build + auto-deploy to the configured dev server
+./gradlew shadowJar
+# The shadowJar task is finalized by copyJarToDevServer, which copies to:
+# C:/Users/minit/Desktop/HYTALE SERVER/Server/mods (default)
+# Override with: -PdevServerMods= or set in gradle.properties
+# Disable with: -PdevServerMods=disabled
+```
+
+### Extending the Plugin
+
+Adding a new subcommand is three lines:
+
+```java
+// In GravityFlipCommand.java
+this.addSubCommand(new GravityFlipMySubCommand(plugin));
+```
+
+Adding a new wand-triggered interaction: register an additional `Interaction.CODEC` entry in `GravityFlipPlugin#setup()` and reference it from your item's `Interactions` block in `src/main/resources/Server/Item/Items/- .json`.
+
+Adding a new region field: append a `KeyedCodec<>` entry to `GravityFlipRegion.CODEC` with a setter/getter pair. Absence in existing `regions.json` preserves the Java default (no migration needed).
+
+---
+
+## Architecture
+
+```
++-----------------------+ +--------------------------+
+| Player / NPC / Item | | regions.json (Config)|
++-----------+-----------+ +-------------+------------+
+ | |
+ | per-tick AABB check | loaded at start()
+ v v
+ +-------+--------+ +--------+---------+
+ | RegionTickLoop | <------------ | RegionRegistry |
+ +-------+--------+ +------------------+
+ |
+ | entity in enabled region?
+ v
+ +-------+---------+ +-------------------+
+ | GravityApplier | ----> | y-velocity invert |
+ | + FallDamageGrd | | + fall-dmg guard |
+ +-----------------+ +-------------------+
+
+ Wand flow (independent, command-driven):
+
+ Player primary/secondary click
+ |
+ v
+ GravityFlipWandInteraction (Interaction.CODEC registered)
+ |
+ v
+ WandSelectionStore (keyed by UUID)
+ |
+ v (on /gravityflip define )
+ RegionRegistry.add(...) -> configHolder.save()
+```
+
+Key technical notes:
+
+- **Plugin entrypoint** (`GravityFlipPlugin`) owns the lifecycle and all singletons. Wand interaction and item codec are registered in `setup()`; tick loop and command registry are wired in `start()`.
+- **Persistence** uses `Config` from the Hytale core API — typed JSON codec, atomic save semantics. The `get()` call is deferred past `setup()` because it blocks on `preLoad()`.
+- **Tick loop** runs every ~100 ms with a 2 s startup delay to let `Universe.get()` settle. `World` is resolved lazily each tick, so the tick is a no-op until the world is ready.
+- **Wand interaction** is registered through `Interaction.CODEC` under the key `"GravityFlipWand"`, matching the `gravityflip_wand_root.json` root interaction that the item references.
+- **Asset pack** is bundled inside the jar (`IncludesAssetPack: true` in `manifest.json`) and includes the wand model, icon, interaction root, and item definition.
+- **Concurrency** — `Config#get()` returns a shared mutable reference; `RegionRegistry` snapshots it into an `AtomicReference` for lock-free tick-loop reads.
+
+---
+
+## Tech Stack
+
+- **Java 25** — modern records, pattern matching, sealed types.
+- **Gradle 8 + `com.gradleup.shadow` 9.3.1** — fat-jar build with gson relocation.
+- **Hytale Plugin API** (`com.hypixel.hytale:Server`) — `JavaPlugin`, `Config`, `Interaction.CODEC`, `BuilderCodec`, `KeyedCodec`, `Universe` / `World` access.
+- **Gson 2.10.1** — relocated under `com.mythlane.gravityflip.libs.gson` to avoid classpath clashes.
+- **JUnit 5.10** — pure-data unit tests for selection store and codec round-trips.
+
+---
+
+## Roadmap
+
+**v1** — **shipped** — custom wand, 6 subcommands, outline + particle visualization, per-region physics tuning, per-entity affect toggles, JSON persistence, first-run bootstrap, dev-server auto-deploy task.
+
+**v2 — planned:**
+
+- Hot-reload subcommand (`/gravityflip reload`) without restart.
+- HUD indicator when entering/leaving a zone.
+- Border visualization improvements (antialiased, beveled corners).
+- Multi-world support (regions keyed by world id).
+- Custom gravity profiles per region (horizontal push, directional gravity, zero-G).
+- Import / export region sets as shareable JSON bundles.
+- Permissions integration (who can create / edit / delete).
+
+---
+
+## Credits
+
+Built by the **[Mythlane](https://mythlane.com)** team.
+
+Plugin structure and conventions informed by the `VotePipe` and `myth_*` Hytale plugin family (Kotlin/Java scaffolding, CamelCase manifests, `gradle.properties` versioning).
+
+---
+
+## License
+
+License TBD. Contact **socials@mythlane.com** for usage inquiries.
diff --git a/SHOWCASE.md b/SHOWCASE.md
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-# Hytale Gravity Flip
-
-
-
-
-
-
-> A Hytale server plugin that lets builders create **inverted-gravity zones** entirely in-game — no code, no restarts. Define a region with a wand, name it, and every player, NPC, or item inside immediately flips upward.
-
----
-
-## Video Showcase
-
-[](https://www.youtube.com/watch?v=VIDEO_ID)
-
-*Click to watch on YouTube*
-
----
-
-## Screenshots
-
-
-
-
-
-
-
-
-
-
----
-
-## Features
-
-- **Six in-game subcommands** — `wand`, `define`, `list`, `show`, `remove`, `reload`. Full workflow without touching config files.
-- **Per-UUID wand selection store** — each builder has their own pair of corners, survives rejoin.
-- **Persistent regions** — all zones saved to `regions.json`, reloaded at boot.
-- **Two visualization modes** — `Outline` (box wireframe) and `Particles` (volumetric fill) with configurable color, opacity, refresh rate, density.
-- **Per-entity affect toggles** — target players only, items only, NPCs only, or any combination.
-- **Configurable physics** — `VerticalForce` (lift strength) and `GracePeriodMs` (smooth entry transition) per region.
-- **Optional fall-damage immunity** — turn off fall damage when leaving a zone so demos don't hurt.
-- **Hot reload** — `/gravityflip reload` re-reads `regions.json` without restarting the server.
-- **Tick-loop detection** — efficient AABB containment check each tick, scales to dozens of active regions.
-
----
-
-## Quick Start
-
-1. **Install** — drop `MythlaneGravityFlip--all.jar` into `Server/mods/` and start the server.
-2. **Get the wand** — in-game, run `/gravityflip wand`. You receive the custom *Gravity Flip Wand* item.
-3. **Pick two corners** — left-click block A (min corner), right-click block B (max corner).
-4. **Name the region** — `/gravityflip define my_zone`. Gravity inverts inside the box immediately.
-
----
-
-## Command Reference
-
-| Command | Effect |
-| ------------------------------- | ---------------------------------------------------------------------- |
-| `/gravityflip wand` | Grants the *Gravity Flip Wand* item to the caller. |
-| `/gravityflip define ` | Creates a region from the caller's current wand selection. |
-| `/gravityflip list` | Prints every registered region with coords and enabled state. |
-| `/gravityflip show ` | Highlights a region's outline for quick visual lookup. |
-| `/gravityflip remove ` | Deletes a region from disk and memory. |
-| `/gravityflip reload` | Re-reads `regions.json` without restarting the server. |
-
----
-
-## Technical Highlights
-
-- **Java 25** — modern pattern matching, records, sealed types.
-- **Gradle Shadow** — single fat-jar output (`./gradlew shadowJar`).
-- **Hytale plugin API** — integrates with `Config` for typed persistence, `Interaction.CODEC` for the custom wand behavior, and a custom item asset pack for the wand visual.
-- **Pure-data selection store** — `WandSelectionStore` keyed by player UUID, testable without a live server.
-- **Tick-driven detection** — per-tick AABB containment, entity-type gating, grace-period smoothing.
-- **Codec-registered interactions** — wand left/right-click registered through `Interaction.CODEC` so the item reacts natively.
-
----
-
-## Showcase Regions
-
-These ship in the `regions.json` bundled with the dev server and cover every plugin capability. Spawn is at `(0, 81, 0)` on a superflat surface.
-
-| Region | Min | Max | What it demonstrates |
-| -------------------------- | ---------------- | ----------------- | --------------------------------------------------------------- |
-| `tutorial_walk_on_ceiling` | (10, 81, 10) | (15, 86, 15) | Baseline player-only flip with cyan outline. |
-| `item_fountain` | (20, 80, 10) | (23, 100, 13) | Tall vertical zone, items only — drop stuff and watch it rise. |
-| `mob_chamber` | (30, 81, 10) | (40, 89, 20) | NPC-only flip with red outline. |
-| `full_chaos` | (-15, 81, 10) | (0, 91, 25) | Players + NPCs + items, purple particles. |
-| `gentle_lift` | (-40, 80, -20) | (-20, 85, 0) | Soft `VerticalForce=0.05` — slow drift. |
-| `strong_launch` | (-15, 80, -15) | (-10, 83, -10) | Aggressive `VerticalForce=0.3` — launch pad. |
-| `grace_period_demo` | (15, 81, -20) | (23, 87, -12) | `GracePeriodMs=5000` — smooth fade-in. |
-| `no_grace` | (25, 81, -20) | (33, 87, -12) | `GracePeriodMs=0` — instant flip, side-by-side comparison. |
-| `fall_damage_off` | (40, 110, 0) | (50, 120, 10) | Elevated zone with `FallDamage=false` — safe exit. |
-| `disabled_example` | (-30, 81, 0) | (-25, 86, 5) | `Enabled=false` — persisted but inert, proves state handling. |
-| `showcase_arena` | (-80, 81, -80) | (-50, 96, -50) | 30×15×30 gold-outlined arena — hero shot for video. |
-| `dense_particles` | (50, 81, 50) | (58, 89, 58) | `VisualParticleDensity=1.0` — maxed visual saturation. |
-
----
-
-## Installation
-
-```bash
-# Build the plugin jar
-./gradlew shadowJar
-
-# Copy to your Hytale server
-cp build/libs/MythlaneGravityFlip-*-all.jar "/Server/mods/"
-
-# Restart the server — the plugin auto-registers its item, interactions, and tick listener.
-```
-
-On first boot the plugin creates `Server/mods/Mythlane_GravityFlip/regions.json`. Edit in-game via commands, or hand-edit the file and `/gravityflip reload`.
-
----
-
-## Development
-
-```bash
-# Run the dev server (auto-deploys the shadow jar into the configured HYTALE_SERVER_DIR)
-./gradlew devServer
-```
-
-Repository layout:
-
-```
-src/main/java/com/mythlane/gravityflip/
- plugin/ # Entry point, interaction + item registration
- regions/ # Region model, store, JSON persistence
- wand/ # Wand item, selection store, interaction handlers
- command/ # /gravityflip subcommand implementations
- tick/ # Per-tick AABB detection and physics application
- visual/ # Outline + particle renderers
-src/test/java/... # Pure-data unit tests (selection store, region codec, etc.)
-docs/screenshots/ # Portfolio assets
-```
-
----
-
-## License / Credits
-
-Built by **[Mythlane](https://mythlane.com)**.
-
-Plugin references: inspired by the structure of VotePipe and the `myth_*` Hytale plugin family (Kotlin DSL scaffolding, CamelCase manifests, `gradle.properties` conventions).
