first pass at tree interaction

src/entities/shared_systems/digging.rs

@@ -1,7 +1,8 @@
 use crate::constants::ITILE_SIZE;
 use crate::entities::item::drop_table::dig_rng;
 use crate::entities::item::prefabs::misc::misc_prefabs::spawn_prefab;
-use crate::world::chunks::{Z_ABOVE, Z_BELOW};
+use crate::world::chunks::Z_BELOW;
+use crate::world::generation::forestry::{fell_tree, TreePart};
 use crate::world::tiles::tile_changed::TileChangedEvent;
 use crate::world::tiles::visibility::TileOcclusionEvent;
 use crate::world::tiles::TileMap;
@@ -27,6 +28,7 @@ pub fn dig_system(
     asset_server: Res<AssetServer>,
     time: Res<Time>,
     mut query: Query<(&Transform, &mut Digger)>,
+    tree_parts: Query<(Entity, &TreePart)>,
     mut tilemap: ResMut<TileMap>,
     mut tile_changed: MessageWriter<TileChangedEvent>,
     mut occlusion: MessageWriter<TileOcclusionEvent>,
@@ -90,6 +92,27 @@ pub fn dig_system(
                     }
                 }
             }
+
+            // If there's a blocking fixture directly above the dug tile, it's a tree trunk —
+            // fell the whole tree. Temporary wiring until a designation + task system
+            // triggers fell_tree explicitly.
+            let above_pos = IVec3::new(below_pos.x, below_pos.y, below_pos.z + ITILE_SIZE);
+            let has_trunk_above = tilemap
+                .fixture_tiles
+                .get(&above_pos)
+                .map(|f| !f.can_stand_in())
+                .unwrap_or(false);
+
+            if has_trunk_above {
+                fell_tree(
+                    above_pos,
+                    &tree_parts,
+                    &mut commands,
+                    &mut tilemap,
+                    &mut tile_changed,
+                    &mut occlusion,
+                );
+            }
         }
     }
 }