Мультиплеер: выделенный WebSocket-сервер, призраки других игроков

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Net/ghost.gd

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+class_name Ghost
+extends Node3D
+# Чужой игрок: капсула, которая плавно догоняет последнее полученное состояние.
+
+const SMOOTHING = 14.0
+
+var target_pos := Vector3.ZERO
+var target_yaw := 0.0
+var flags := 0
+var body: MeshInstance3D
+var visor: MeshInstance3D
+
+func setup(id: int, pos: Vector3) -> void:
+	name = "Ghost_%d" % id
+	position = pos
+	target_pos = pos
+	var color := Color.from_hsv(fmod(id * 0.618034, 1.0), 0.7, 1.0)
+
+	var mat := StandardMaterial3D.new()
+	mat.albedo_color = color
+	mat.emission_enabled = true
+	mat.emission = color
+	mat.emission_energy_multiplier = 0.6
+
+	var capsule := CapsuleMesh.new()
+	capsule.radius = 0.34
+	capsule.height = 2.3
+	body = MeshInstance3D.new()
+	body.mesh = capsule
+	body.material_override = mat
+	add_child(body)
+
+	# «Визор» показывает, куда смотрит игрок (-Z — вперёд)
+	var box := BoxMesh.new()
+	box.size = Vector3(0.5, 0.15, 0.3)
+	visor = MeshInstance3D.new()
+	visor.mesh = box
+	visor.position = Vector3(0, 0.9, -0.25)
+	add_child(visor)
+
+	var label := Label3D.new()
+	label.text = "Игрок %d" % (id % 1000)
+	label.billboard = BaseMaterial3D.BILLBOARD_ENABLED
+	label.no_depth_test = true
+	label.position = Vector3(0, 1.6, 0)
+	label.pixel_size = 0.005
+	add_child(label)
+
+func set_target(pos: Vector3, yaw: float, pitch: float, new_flags: int) -> void:
+	target_pos = pos
+	target_yaw = yaw
+	flags = new_flags
+	visor.rotation.x = pitch
+
+func _process(delta: float) -> void:
+	var t := 1.0 - exp(-SMOOTHING * delta)
+	position = position.lerp(target_pos, t)
+	rotation.y = lerp_angle(rotation.y, target_yaw, t)
+
+	var sliding := (flags & Net.FLAG_SLIDING) != 0
+	var squash := 0.55 if sliding else 1.0
+	body.scale = body.scale.lerp(Vector3(1, squash, 1), t)
+	var roll := 0.0
+	if (flags & Net.FLAG_WALLRUN) != 0:
+		roll = 0.35
+	body.rotation.z = lerp(body.rotation.z, roll, t)

Net/ghost.gd.uid

@@ -0,0 +1 @@
+uid://c8h6333310d0m

Net/net.gd

@@ -0,0 +1,122 @@
+extends Node
+# Автолоад "Net". Один и тот же скрипт работает и на клиенте, и на выделенном сервере
+# (RPC требуют одинаковый путь узла и скрипт). Сервер — это headless-запуск Godot.
+
+const PORT = 9080
+const DEFAULT_URL = "ws://127.0.0.1:9080"
+const SEND_RATE = 20.0
+const RETRY_DELAY = 3.0
+
+const FLAG_SLIDING = 1
+const FLAG_WALLRUN = 2
+const FLAG_DASH = 4
+const FLAG_MANTLE = 8
+
+var is_server := false
+var ghosts := {}            # peer_id -> Ghost
+var send_timer := 0.0
+var connected := false
+
+func _ready() -> void:
+	is_server = DisplayServer.get_name() == "headless"
+	if is_server:
+		_start_server()
+	else:
+		_connect_client()
+
+# ---------- Сервер ----------
+
+func _start_server() -> void:
+	var peer := WebSocketMultiplayerPeer.new()
+	var err := peer.create_server(PORT)
+	if err != OK:
+		push_error("Не удалось открыть порт %d: %s" % [PORT, error_string(err)])
+		get_tree().quit(1)
+		return
+	multiplayer.multiplayer_peer = peer
+	multiplayer.peer_connected.connect(func(id): print("+ игрок ", id))
+	multiplayer.peer_disconnected.connect(_server_peer_left)
+	print("Сервер запущен на порту ", PORT)
+
+func _server_peer_left(id: int) -> void:
+	print("- игрок ", id)
+	for other in multiplayer.get_peers():
+		recv_left.rpc_id(other, id)
+
+# Клиент -> сервер: своё состояние. Сервер пересылает остальным.
+@rpc("any_peer", "unreliable_ordered")
+func submit_state(pos: Vector3, yaw: float, pitch: float, flags: int) -> void:
+	if not is_server:
+		return
+	var sender := multiplayer.get_remote_sender_id()
+	for other in multiplayer.get_peers():
+		if other != sender:
+			recv_state.rpc_id(other, sender, pos, yaw, pitch, flags)
+
+# ---------- Клиент ----------
+
+func _server_url() -> String:
+	for arg in OS.get_cmdline_user_args():
+		if arg.begins_with("--server-url="):
+			return arg.substr("--server-url=".length())
+	if OS.has_feature("web"):
+		var proto = JavaScriptBridge.eval("window.location.protocol")
+		var host = JavaScriptBridge.eval("window.location.host")
+		return ("wss://" if proto == "https:" else "ws://") + str(host) + "/ws"
+	return DEFAULT_URL
+
+func _connect_client() -> void:
+	var peer := WebSocketMultiplayerPeer.new()
+	var err := peer.create_client(_server_url())
+	if err != OK:
+		push_warning("Не удалось подключиться: %s" % error_string(err))
+		_schedule_retry()
+		return
+	multiplayer.multiplayer_peer = peer
+	if not multiplayer.connected_to_server.is_connected(_on_connected):
+		multiplayer.connected_to_server.connect(_on_connected)
+		multiplayer.connection_failed.connect(_on_lost)
+		multiplayer.server_disconnected.connect(_on_lost)
+
+func _on_connected() -> void:
+	connected = true
+
+func _on_lost() -> void:
+	connected = false
+	for g in ghosts.values():
+		g.queue_free()
+	ghosts.clear()
+	multiplayer.multiplayer_peer = null
+	_schedule_retry()
+
+func _schedule_retry() -> void:
+	get_tree().create_timer(RETRY_DELAY).timeout.connect(_connect_client)
+
+@rpc("authority", "unreliable_ordered")
+func recv_state(id: int, pos: Vector3, yaw: float, pitch: float, flags: int) -> void:
+	var ghost: Ghost = ghosts.get(id)
+	if ghost == null:
+		ghost = Ghost.new()
+		ghost.setup(id, pos)
+		ghosts[id] = ghost
+		get_tree().current_scene.add_child(ghost)
+	ghost.set_target(pos, yaw, pitch, flags)
+
+@rpc("authority", "reliable")
+func recv_left(id: int) -> void:
+	var ghost = ghosts.get(id)
+	if ghost:
+		ghost.queue_free()
+		ghosts.erase(id)
+
+func _process(delta: float) -> void:
+	if is_server or not connected:
+		return
+	send_timer += delta
+	if send_timer < 1.0 / SEND_RATE:
+		return
+	send_timer = 0.0
+	var player := get_tree().get_first_node_in_group("local_player")
+	if player == null:
+		return
+	submit_state.rpc_id(1, player.global_position, player.rotation.y, player.head.rotation.x, player.get_net_flags())

Net/net.gd.uid

@@ -0,0 +1 @@
+uid://dtwbyyjncecj2

Net/server.tscn

@@ -0,0 +1,3 @@
+[gd_scene format=3]
+
+[node name="Server" type="Node"]