feat(simulation): add tile collision system (#236)

TilePosition component with discrete grid coordinates, flat-storage WalkabilityMap resource with O(1) can_move_to() lookup, MoveIntent component and validate_movement system. Movement validated against walkability map each tick, blocking all NPC and player movement through unwalkable tiles. 11 unit tests + 1 integration test. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-11 19:07:53 +01:00
parent 4ed15c1a38
commit 862ab9099f
3 changed files with 407 additions and 1 deletions
@@ -0,0 +1,54 @@
+use bevy_app::prelude::*;
+use settled_reach_server::simulation::movement::*;
+use settled_reach_server::simulation::time::SimulationTime;
+use settled_reach_server::simulation::SimulationPlugin;
+
+#[test]
+fn movement_validated_within_app() {
+    let mut app = App::new();
+    app.add_plugins(SimulationPlugin);
+
+    // Insert a walkability map with one blocked tile
+    let mut map = WalkabilityMap::new(10, 10, 1);
+    map.set_walkable(&TilePosition::new(3, 3, 0), false);
+    app.insert_resource(map);
+
+    // Spawn mover (walkable target) and blocked entity
+    let mover = app
+        .world_mut()
+        .spawn((
+            TilePosition::new(5, 5, 0),
+            MoveIntent {
+                target: TilePosition::new(5, 4, 0),
+            },
+        ))
+        .id();
+
+    let blocked = app
+        .world_mut()
+        .spawn((
+            TilePosition::new(3, 4, 0),
+            MoveIntent {
+                target: TilePosition::new(3, 3, 0),
+            },
+        ))
+        .id();
+
+    app.update();
+
+    // Mover moved
+    assert_eq!(
+        *app.world().get::<TilePosition>(mover).unwrap(),
+        TilePosition::new(5, 4, 0)
+    );
+    // Blocked stayed
+    assert_eq!(
+        *app.world().get::<TilePosition>(blocked).unwrap(),
+        TilePosition::new(3, 4, 0)
+    );
+    // Tick advanced
+    assert_eq!(app.world().resource::<SimulationTime>().tick, 1);
+    // Both intents consumed
+    assert!(app.world().get::<MoveIntent>(mover).is_none());
+    assert!(app.world().get::<MoveIntent>(blocked).is_none());
+}