226 lines
7.0 KiB
GDScript
226 lines
7.0 KiB
GDScript
extends CanvasLayer
|
||
## 联机总入口（Autoload 名：Net，指向 res://autoload/net.tscn）
|
||
##
|
||
## 职责边界：只负责「选传输层 + 开局/加入/断开 + 玩家生成回收」。
|
||
## 玩法代码不直接接触 MultiplayerPeer —— 以后要把 ENet 换成 Steam P2P，
|
||
## 只需要改本文件的 host_game / join_game 两个函数，RPC 与 Spawner 层不用动。
|
||
##
|
||
## 界面是**节点配置**：整个 UI 在 res://autoload/net.tscn 里用节点搭好，
|
||
## 本脚本只做「改文字、切显隐」这类状态更新，不动态创建任何 Control。
|
||
## 按钮的 pressed 信号也在 net.tscn 里连接（打开场景 → 选按钮 → 节点面板 → 信号）。
|
||
##
|
||
## 本机双开调试（命令行）：
|
||
## godot --path <项目目录> -- --host
|
||
## godot --path <项目目录> -- --join 127.0.0.1
|
||
|
||
const PORT: int = 7000
|
||
const MAX_PLAYERS: int = 8
|
||
const DEFAULT_ADDRESS: String = "127.0.0.1"
|
||
## 所有玩家节点都会加入这个组，方便整批清场
|
||
const PLAYER_GROUP: String = "net_player"
|
||
## 开局后要进的世界场景，以及断开后要回的入口场景
|
||
const WORLD_SCENE: String = "res://world/main.tscn"
|
||
const MENU_SCENE: String = "res://ui/main_menu.tscn"
|
||
|
||
var _spawner: MultiplayerSpawner = null
|
||
|
||
@onready var _menu: CenterContainer = $Menu
|
||
@onready var _address_edit: LineEdit = $Menu/Panel/Box/AddressEdit
|
||
@onready var _menu_status: Label = $Menu/Panel/Box/StatusLabel
|
||
@onready var _hud: Control = $Hud
|
||
@onready var _hud_status: Label = $Hud/Box/StatusLabel
|
||
|
||
|
||
func _ready() -> void:
|
||
multiplayer.peer_connected.connect(_on_peer_connected)
|
||
multiplayer.peer_disconnected.connect(_on_peer_disconnected)
|
||
multiplayer.connected_to_server.connect(_on_connected_to_server)
|
||
multiplayer.connection_failed.connect(_on_connection_failed)
|
||
multiplayer.server_disconnected.connect(_on_server_disconnected)
|
||
_show_menu_ui()
|
||
call_deferred("_apply_cmdline")
|
||
|
||
|
||
# ---------------- 对外接口 ----------------
|
||
|
||
## 世界根节点在 _ready 里调用，把 MultiplayerSpawner 托管给 Net。
|
||
##
|
||
## 世界是「开局之后」才加载的（入口是开始菜单），所以这里得把已经连上的玩家补生成一遍 ——
|
||
## 否则主机在菜单里就开好了，切进世界时一个角色都不会出现。
|
||
func bind_spawner(spawner: MultiplayerSpawner) -> void:
|
||
_spawner = spawner
|
||
if multiplayer.is_server():
|
||
call_deferred("_spawn_player", 1)
|
||
for id in multiplayer.get_peers():
|
||
call_deferred("_spawn_player", id)
|
||
|
||
|
||
## 菜单那边用它开关「联机」面板 —— 面板默认是显示的，会盖住入口菜单。
|
||
func set_menu_visible(on: bool) -> void:
|
||
_menu.visible = on
|
||
|
||
|
||
## 创建主机。ENet 是客户端-服务器模型，主机同时是服务器与玩家。
|
||
func host_game() -> void:
|
||
var peer := ENetMultiplayerPeer.new()
|
||
var err := peer.create_server(PORT, MAX_PLAYERS)
|
||
if err != OK:
|
||
_set_status("创建主机失败：%s" % error_string(err))
|
||
return
|
||
multiplayer.multiplayer_peer = peer
|
||
_show_game_ui()
|
||
print("[Net] 主机已启动，端口 %d" % PORT)
|
||
# 入口是开始菜单，世界这时还没加载 —— 切过去，角色由 bind_spawner 补生成
|
||
call_deferred("_enter_world")
|
||
|
||
|
||
## 加入主机。address 为主机在局域网内的内网 IP。
|
||
func join_game(address: String = DEFAULT_ADDRESS) -> void:
|
||
var target := address.strip_edges()
|
||
if target.is_empty():
|
||
target = DEFAULT_ADDRESS
|
||
var peer := ENetMultiplayerPeer.new()
|
||
var err := peer.create_client(target, PORT)
|
||
if err != OK:
|
||
_set_status("连接失败：%s" % error_string(err))
|
||
return
|
||
multiplayer.multiplayer_peer = peer
|
||
_set_status("正在连接 %s:%d …" % [target, PORT])
|
||
print("[Net] 正在连接 %s:%d" % [target, PORT])
|
||
|
||
|
||
## 断开并清场，回入口菜单。
|
||
func leave_game() -> void:
|
||
multiplayer.multiplayer_peer = null
|
||
_clear_players()
|
||
# 世界一卸载 spawner 就跟着没了，留着引用会指向已释放的节点
|
||
_spawner = null
|
||
Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
|
||
_show_menu_ui()
|
||
_set_status("已断开")
|
||
call_deferred("_go_to", MENU_SCENE)
|
||
|
||
|
||
## 切到世界场景。已经在里面就不重复切
|
||
func _enter_world() -> void:
|
||
_go_to(WORLD_SCENE)
|
||
|
||
|
||
func _go_to(path: String) -> void:
|
||
var current := get_tree().current_scene
|
||
if current != null and current.scene_file_path == path:
|
||
return
|
||
get_tree().change_scene_to_file(path)
|
||
|
||
|
||
# ---------------- 网络事件 ----------------
|
||
|
||
func _on_peer_connected(id: int) -> void:
|
||
# 只有服务器生成角色，客户端靠 MultiplayerSpawner 自动收到同一份。
|
||
if multiplayer.is_server():
|
||
call_deferred("_spawn_player", id)
|
||
|
||
|
||
func _on_peer_disconnected(id: int) -> void:
|
||
if multiplayer.is_server():
|
||
_despawn_player(id)
|
||
|
||
|
||
func _on_connected_to_server() -> void:
|
||
_show_game_ui()
|
||
print("[Net] 已连接，等待主机生成角色")
|
||
call_deferred("_enter_world")
|
||
|
||
|
||
func _on_connection_failed() -> void:
|
||
multiplayer.multiplayer_peer = null
|
||
_set_status("连接失败：主机无响应")
|
||
|
||
|
||
func _on_server_disconnected() -> void:
|
||
multiplayer.multiplayer_peer = null
|
||
_clear_players()
|
||
Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
|
||
_show_menu_ui()
|
||
_set_status("主机已关闭")
|
||
|
||
|
||
# ---------------- 玩家生成与回收 ----------------
|
||
|
||
func _spawn_player(peer_id: int) -> void:
|
||
if not is_instance_valid(_spawner) or not multiplayer.is_server():
|
||
return
|
||
var parent := _spawner.get_node_or_null(_spawner.spawn_path)
|
||
if parent == null or parent.has_node(str(peer_id)):
|
||
return
|
||
_spawner.spawn(peer_id)
|
||
|
||
|
||
func _despawn_player(peer_id: int) -> void:
|
||
if not is_instance_valid(_spawner):
|
||
return
|
||
var parent := _spawner.get_node_or_null(_spawner.spawn_path)
|
||
if parent == null:
|
||
return
|
||
var node := parent.get_node_or_null(str(peer_id))
|
||
if node != null:
|
||
node.queue_free()
|
||
|
||
|
||
func _clear_players() -> void:
|
||
for node in get_tree().get_nodes_in_group(PLAYER_GROUP):
|
||
node.queue_free()
|
||
|
||
|
||
# ---------------- 命令行调试入口 ----------------
|
||
|
||
func _apply_cmdline() -> void:
|
||
var args := OS.get_cmdline_user_args()
|
||
if args.has("--host"):
|
||
host_game()
|
||
elif args.has("--join"):
|
||
var index := args.find("--join")
|
||
var address := DEFAULT_ADDRESS
|
||
if index + 1 < args.size():
|
||
address = args[index + 1]
|
||
join_game(address)
|
||
|
||
|
||
# ---------------- 界面（节点都在 net.tscn 里，这里只管状态） ----------------
|
||
|
||
## 两个按钮的 pressed 信号在 net.tscn 里连到这里
|
||
func _on_host_button_pressed() -> void:
|
||
host_game()
|
||
|
||
|
||
func _on_join_button_pressed() -> void:
|
||
join_game(_address_edit.text)
|
||
|
||
|
||
func _unhandled_key_input(event: InputEvent) -> void:
|
||
if event is InputEventKey and event.pressed and not event.echo \
|
||
and event.keycode == KEY_F10 and multiplayer.multiplayer_peer != null:
|
||
leave_game()
|
||
get_viewport().set_input_as_handled()
|
||
|
||
|
||
func _show_game_ui() -> void:
|
||
_menu.visible = false
|
||
_hud.visible = true
|
||
_update_hud()
|
||
|
||
|
||
func _show_menu_ui() -> void:
|
||
_menu.visible = true
|
||
_hud.visible = false
|
||
|
||
|
||
func _set_status(text: String) -> void:
|
||
_menu_status.text = text
|
||
|
||
|
||
func _update_hud() -> void:
|
||
var role := "主机" if multiplayer.is_server() else "客户端"
|
||
var players := multiplayer.get_peers().size() + 1
|
||
_hud_status.text = "联机中 · %s · 玩家 %d" % [role, players]
|