Room system added

nodes/combat_map.gd

@@ -2,6 +2,7 @@ class_name CombatMap
 extends Node2D
 
 @export var tile_set: DLTileset
+@export var map_layout: MapLayout
 @onready var tile_map: TileMapLayer = %TerrainLayer
 @onready var highlight_map: GridOverlay = %OverlayLayer
 
@@ -18,6 +19,8 @@ func _ready() -> void:
 	for entry in _pending_units:
 		_apply_deploy(entry.unit, entry.coords)
 	_pending_units.clear()
+	if map_layout:
+		apply_layout(map_layout)
 
 
 func snap_to_grid(pos: Vector2) -> Vector2:
@@ -79,3 +82,52 @@ func remove_unit(unit: Unit) -> void:
 
 func target_tile(coords: Vector2i) -> void:
 	highlight_map.target_tile(coords)
+
+
+func apply_layout(layout: MapLayout) -> void:
+	map_layout = layout
+	map_layout.initialize()
+	load_from_layout()
+	draw_room_walls()
+
+
+func is_tile_passable(from: Vector2i, to: Vector2i) -> bool:
+	if map_layout:
+		return map_layout.is_passable(from, to)
+	# Fallback: no room system, use legacy wall check
+	return not is_wall(to)
+
+
+func is_tile_valid(coords: Vector2i) -> bool:
+	if map_layout:
+		return map_layout.is_tile_valid(coords)
+	# Fallback: no room system, any non-wall tile is valid
+	return not is_wall(coords)
+
+
+func draw_room_walls() -> void:
+	if not map_layout:
+		return
+	var walls := map_layout.get_walls()
+	for wall in walls:
+		var from_world := coords_to_world(wall[0]) + Vector2(TILE_SIZE / 2, TILE_SIZE / 2)
+		var to_world := coords_to_world(wall[1]) + Vector2(TILE_SIZE / 2, TILE_SIZE / 2)
+		var midpoint := (from_world + to_world) / 2
+		var diff := to_world - from_world
+		var wall_dir := Vector2(-diff.y, diff.x).normalized()
+		var half_len := TILE_SIZE / 2
+
+		var line := Line2D.new()
+		line.add_point(midpoint - wall_dir * half_len)
+		line.add_point(midpoint + wall_dir * half_len)
+		line.width = 4.0
+		line.default_color = Color(0.6, 0.5, 0.4)
+		add_child(line)
+
+
+func load_from_layout() -> void:
+	if not map_layout:
+		return
+	for room in map_layout.rooms:
+		for tile in room.tiles:
+			draw_floor(tile)