feat: Introduce an EnhancedGridMap with advanced grid generation, randomization, and data serialization features, along with a default MeshLibrary and a new main scene script.

addons/enhanced_gridmap/enhanced_gridmap.gd

@@ -182,6 +182,38 @@ func clear_grid(floor_index: int = -1):
 		clear_floor(floor_index)
 	update_grid_data()
 
+# =============================================================================
+# Data Serialization Helpers (For Networking)
+# =============================================================================
+
+func get_floor_data(floor_index: int) -> PackedInt32Array:
+	# Returns a flat PackedInt32Array [x, z, item_id, ...] for the specified floor.
+	var data = PackedInt32Array()
+	# Use get_used_cells() as the source of truth from the GridMap itself
+	for cell in get_used_cells():
+		if cell.y == floor_index:
+			data.append(cell.x)
+			data.append(cell.z)
+			data.append(get_cell_item(cell))
+	return data
+
+func set_floor_data(floor_index: int, data: PackedInt32Array):
+	# Sets the floor items from a flat PackedInt32Array. Clears existing items on that floor first.
+	clear_floor(floor_index)
+	# Iterate by triplets [x, z, item]
+	var count = data.size()
+	if count % 3 != 0:
+		print("[EnhancedGridMap] Error: Malformed grid data array (size %d not divisible by 3)" % count)
+		return
+		
+	for i in range(0, count, 3):
+		var x = data[i]
+		var z = data[i+1]
+		var item = data[i+2]
+		set_cell_item(Vector3i(x, floor_index, z), item)
+	
+	update_grid_data()
+
 func fill_grid(item_index: int, floor_index: int = -1):
 	if not mesh_library:
 		print("No MeshLibrary assigned to GridMap")

addons/enhanced_gridmap/meshlibrary/default.tres

@@ -6,8 +6,7 @@
 [ext_resource type="ArrayMesh" uid="uid://brevl3ab0tdqe" path="res://assets/models/tiles/tile_wall.tres" id="4_8v5xv"]
 [ext_resource type="ArrayMesh" uid="uid://b5ta7tcw0iscd" path="res://assets/models/tiles/tile_coin.tres" id="4_76xkl"]
 [ext_resource type="ArrayMesh" uid="uid://d4himvyb81in8" path="res://assets/models/meshes/non-walkable.res" id="4_sx8rm"]
-[ext_resource type="ArrayMesh" uid="uid://dr80txgr61irt" path="res://assets/models/tiles/tile_diamond.tres" id="5_j2mx0"]
-[ext_resource type="ArrayMesh" uid="uid://dr80txgr61irt" path="res://assets/models/tiles/tile_area_freeze.tres" id="5_sx8rm"]
+[ext_resource type="ArrayMesh" uid="uid://dr80txgr61irt" path="res://assets/models/tiles/tile_diamond.tres" id="5_sx8rm"]
 [ext_resource type="ArrayMesh" uid="uid://bqvqj3fhf5x51" path="res://assets/models/tiles/tile_ghost.tres" id="6_r32il"]
 [ext_resource type="ArrayMesh" uid="uid://cv4bedhida00g" path="res://assets/models/tiles/tile_star.tres" id="7_p5epg"]
 
@@ -151,7 +150,7 @@ item/7/shapes = []
 item/7/navigation_mesh_transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0)
 item/7/navigation_layers = 1
 item/8/name = "tile_diamond"
-item/8/mesh = ExtResource("5_j2mx0")
+item/8/mesh = ExtResource("5_sx8rm")
 item/8/mesh_transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0)
 item/8/mesh_cast_shadow = 1
 item/8/shapes = []

scenes/main.gd

@@ -463,6 +463,10 @@ func _setup_client_game():
 	# Wait shorter time for host to be ready, then request full sync to correct positions/state
 	await get_tree().create_timer(1.0).timeout
 	rpc_id(1, "request_full_player_sync", my_id)
+	
+	# Only request grid if we remain connected
+	if multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer.get_connection_status() == MultiplayerPeer.CONNECTION_CONNECTED:
+		rpc_id(1, "request_full_grid_sync")
 
 func _auto_start_from_lobby():
 	"""Called when main.tscn is loaded from lobby - game is already connected."""
@@ -1032,6 +1036,32 @@ func randomize_game_grid():
 		# For now, let's assume server authority + sync on connect handles it, or add sync loop if critical.
 		pass
 
+@rpc("any_peer")
+func request_full_grid_sync():
+	if multiplayer.is_server():
+		var sender_id = multiplayer.get_remote_sender_id()
+		print("[Main] Grid sync requested by %d" % sender_id)
+		var enhanced_gridmap = $EnhancedGridMap
+		if enhanced_gridmap:
+			var grid_data = enhanced_gridmap.get_floor_data(1) # Sync Floor 1 (Items)
+			print("[Main] Server: Prepared grid data. Size: %d. Sending to %d..." % [grid_data.size(), sender_id])
+			
+			# Force send (Server is usually always connected)
+			rpc_id(sender_id, "sync_full_grid_data", grid_data)
+			print("[Main] Server: Sent rpc_id to %d" % sender_id)
+
+@rpc("authority", "call_local", "reliable")
+func sync_full_grid_data(data: PackedInt32Array):
+	print("[Main] sync_full_grid_data received. Items: %d" % (data.size() / 3))
+	var enhanced_gridmap = $EnhancedGridMap
+	if not enhanced_gridmap: 
+		print("[Main] Error: EnhancedGridMap not found!")
+		return
+	
+	# Apply the synced data to Floor 1
+	enhanced_gridmap.set_floor_data(1, data)
+	print("[Main] Grid sync complete.")
+
 
 # =============================================================================
 # Goals Cycle & Leaderboard UI