# Last 48h Git Diff

## Commit: 9535d65 (HEAD)
### Message: feat: data-oriented chunks optimization with tile registry

Files changed (14 files, +423 -84):

```
tiles.toml                                        | +186 (NEW)
src/config.rs                                     | +50
src/entities/shared_systems/pathfinding.rs         | +45 -4
src/entities/shared_components/ambulatory.rs      | +10 -10
src/entities/livestock/pig.rs                     | +10 -2
src/entities/livestock/rabbit.rs                  | +8
src/entities/sentient/dorf.rs                     | +8
src/game.rs                                      | +12
src/main.rs                                      | +16 -16
src/world/generation/terrain.rs                   | +123 -3
src/world/mod.rs                                 | +12
src/world/tiles/chunk_data.rs                    | +21
src/world/tiles/prefabs.rs                       | +85 -19
src/world/tiles/tilemap.rs                       | +14
```

### Key Changes:

#### 1. External Tile Registry (tiles.toml)
- New `tiles.toml` for hot-reloadable tile definitions
- Floor tiles: air, grass, dirt, rock, bedrock with weight/standability
- Fixture tiles: walls, log, leaves
- IDs, weights, can_stand_in, can_stand_on all configurable

#### 2. Config.rs additions
- `TileRegistry` struct with `OnceLock` global singleton
- `FloorTileDef` and `FixtureTileDef` structs
- Loads from `tiles.toml` at first access
- `global()` method for async-safe access

#### 3. Pathfinding.rs changes
- `calculate_movement_cost(move_dir, tile_weight)` - now takes weight param
- `get_tile_weight(tilemap, pos)` - retrieves weight from tile
- Movement speed modifier: `threshold = walk_speed * (tile_weight / 50)`
- `SpawnDelay` resource for delayed spawning

#### 4. Chunk data improvements
- `ChunkData::is_standable()` bit-packed standability checks
- `get_astar_weight()` method for pathfinding cost

#### 5. world_to_chunk fix
- Changed from `CHUNK_SIZE` (8) to `CHUNK_SIZE_TILE` (128)

#### 6. Entity spawning fixes
- `Local<bool>` state guards prevent infinite spawning
- Grid-aligned spawn coordinates
- Delayed spawning with `SpawnDelay` resource

---

## Commit: 50788af
### Message: feat(optimization): implement data-oriented chunk architecture

Previous optimization phases:
- ChunkData with bit-packed standability
- Dirty chunk tracking for O(d) connectivity
- Async terrain generation