Dynamic Falling Tree

# Dynamic Falling Tree Realistic tree falling physics for Minecraft 1.21.1 (Fabric). When you chop a tree, it falls over using rigid-body physics instead of instantly disappearing. !(https://github.com/Cukkoo12/dynamic-falling-tree/raw/main/kayit.gif) !(https://github.com/Cukkoo12/dynamic-falling-tree/raw/main/ekrangoruntu.png) ## What It Does - Chopping the base log of a tree causes the entire tree to tip over and fall using real physics simulation. - Blocks are removed flicker-free via a `BARRIER -> AIR` sequence in the same server tick. - Trees spawn impact smoke particles when they hit the ground. - Leaves break naturally after the tree settles, with vanilla particle effects. - Works on rootless/floating trees as well as grounded ones. ## Requirements | Dependency | Version | | ------------------------------------------- | ----------------- | | Minecraft | 1.21.1 | | Fabric Loader | >= 0.16.9 | | Fabric API | >= 0.110.0+1.21.1 | | (https://github.com/ryanhcode/sable) | >= 1.2.2 | ## Installation 1. Install (https://fabricmc.net/use/) for 1.21.1. 2. Download **Sable** and place it in your `mods/` folder. 3. Download this mod's JAR and place it in `mods/`. 4. Launch and chop a tree. ## Configuration Config file auto-generates at `.minecraft/config/treephysics.properties`: ```properties rootless_tree_detection=true requires_axe=false prevent_interacting_with_trees=true rooted_dirt_generation=true impulse_torque=2.0 impulse_force=1.5 ``` | Option | Description | Default | | -------------------------------- | --------------------------------------------------- | ------- | | `rootless_tree_detection` | Allow floating trees to fall. | `true` | | `requires_axe` | Only trigger physics when holding an axe. | `false` | | `prevent_interacting_with_trees` | Block placing/using items on falling trees. | `true` | | `rooted_dirt_generation` | Generate rooted dirt under naturally spawned trees. | `true` | | `impulse_torque` | Rotational force applied to falling trees. | `2.0` | | `impulse_force` | Linear push force applied to falling trees. | `1.5` | ## How It Works 1. **Detection**: Breaking a log triggers a flood-fill search for connected logs, leaves, and attached blocks. 2. **Validation**: The detected structure is validated as a tree (must have a root on dirt or have leaves if rootless mode is on). 3. **Assembly**: Valid tree blocks are converted into a Sable `ServerSubLevel` — a physics-backed block container with independent collision and transform. 4. **Flicker Fix**: Original world blocks are replaced with `BARRIER`, then immediately `AIR`, preventing any visual flicker. 5. **Impulse**: A directional force and torque are applied based on the player's position, causing the tree to tip over. 6. **Impact & Decay**: While falling, the server tracks velocity. Ground contact spawns smoke particles. After settling, leaves break naturally. ## Technical Details - Built on the (https://github.com/ryanhcode/sable) physics engine using SubLevel rigid-body simulation. - All physics runs server-side and syncs to clients over the network. - Singleplayer and multiplayer compatible. - Licensed under MIT.