d219547c96
Initial implementation of the MultiplayerReplicationInterface and its default implementation (SceneReplicationInterface). New MultiplayerSpawner node helps dealing with instantiation of scenes on remote peers (e.g. clients). It supports both custom spawns via a `_spawn_custom` virtual function, and optional auto-spawn of known scenes via a TypedArray<PackedScenes> property. New MultiplayerSynchornizer helps synchronizing states between the local and remote peers, supports both sync and spawn properties and is configured via a `SceneReplicationConfig` resource. It can also sync via path (i.e. without being spawned by a MultiplayerSpawner if both peers has it in tree, but will not send the spawn state in that case, only the sync one.
227 lines
10 KiB
C++
227 lines
10 KiB
C++
/*************************************************************************/
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/* multiplayer_spawner.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "multiplayer_spawner.h"
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#include "core/io/marshalls.h"
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#include "core/multiplayer/multiplayer_api.h"
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#include "scene/main/window.h"
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#include "scene/scene_string_names.h"
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void MultiplayerSpawner::_bind_methods() {
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ClassDB::bind_method(D_METHOD("spawn", "data"), &MultiplayerSpawner::spawn, DEFVAL(Variant()));
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ClassDB::bind_method(D_METHOD("get_spawnable_scenes"), &MultiplayerSpawner::get_spawnable_scenes);
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ClassDB::bind_method(D_METHOD("set_spawnable_scenes", "scenes"), &MultiplayerSpawner::set_spawnable_scenes);
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ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "replication", PROPERTY_HINT_ARRAY_TYPE, vformat("%s/%s:%s", Variant::OBJECT, PROPERTY_HINT_RESOURCE_TYPE, "PackedScene"), (PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_SCRIPT_VARIABLE)), "set_spawnable_scenes", "get_spawnable_scenes");
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ClassDB::bind_method(D_METHOD("get_spawn_path"), &MultiplayerSpawner::get_spawn_path);
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ClassDB::bind_method(D_METHOD("set_spawn_path", "path"), &MultiplayerSpawner::set_spawn_path);
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ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "spawn_path", PROPERTY_HINT_NONE, ""), "set_spawn_path", "get_spawn_path");
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ClassDB::bind_method(D_METHOD("get_spawn_limit"), &MultiplayerSpawner::get_spawn_limit);
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ClassDB::bind_method(D_METHOD("set_spawn_limit", "limit"), &MultiplayerSpawner::set_spawn_limit);
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ADD_PROPERTY(PropertyInfo(Variant::INT, "spawn_limit", PROPERTY_HINT_RANGE, "0,1024,1,or_greater"), "set_spawn_limit", "get_spawn_limit");
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ClassDB::bind_method(D_METHOD("set_auto_spawning", "enabled"), &MultiplayerSpawner::set_auto_spawning);
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ClassDB::bind_method(D_METHOD("is_auto_spawning"), &MultiplayerSpawner::is_auto_spawning);
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "auto_spawn"), "set_auto_spawning", "is_auto_spawning");
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GDVIRTUAL_BIND(_spawn_custom, "data");
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ADD_SIGNAL(MethodInfo("despawned", PropertyInfo(Variant::INT, "scene_id"), PropertyInfo(Variant::OBJECT, "node", PROPERTY_HINT_RESOURCE_TYPE, "Node")));
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ADD_SIGNAL(MethodInfo("spawned", PropertyInfo(Variant::INT, "scene_id"), PropertyInfo(Variant::OBJECT, "node", PROPERTY_HINT_RESOURCE_TYPE, "Node")));
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}
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void MultiplayerSpawner::_update_spawn_node() {
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#ifdef TOOLS_ENABLED
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if (Engine::get_singleton()->is_editor_hint()) {
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return;
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}
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#endif
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if (spawn_node.is_valid()) {
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Node *node = Object::cast_to<Node>(ObjectDB::get_instance(spawn_node));
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if (node && node->is_connected("child_entered_tree", callable_mp(this, &MultiplayerSpawner::_node_added))) {
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node->disconnect("child_entered_tree", callable_mp(this, &MultiplayerSpawner::_node_added));
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}
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}
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Node *node = spawn_path.is_empty() && is_inside_tree() ? nullptr : get_node_or_null(spawn_path);
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if (node) {
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spawn_node = node->get_instance_id();
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if (auto_spawn) {
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node->connect("child_entered_tree", callable_mp(this, &MultiplayerSpawner::_node_added));
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}
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} else {
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spawn_node = ObjectID();
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}
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}
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void MultiplayerSpawner::_notification(int p_what) {
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if (p_what == NOTIFICATION_POST_ENTER_TREE) {
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_update_spawn_node();
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} else if (p_what == NOTIFICATION_EXIT_TREE) {
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_update_spawn_node();
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const ObjectID *oid = nullptr;
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while ((oid = tracked_nodes.next(oid))) {
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Node *node = Object::cast_to<Node>(ObjectDB::get_instance(*oid));
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ERR_CONTINUE(!node);
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node->disconnect(SceneStringNames::get_singleton()->tree_exiting, callable_mp(this, &MultiplayerSpawner::_node_exit));
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// This is unlikely, but might still crash the engine.
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if (node->is_connected(SceneStringNames::get_singleton()->ready, callable_mp(this, &MultiplayerSpawner::_node_ready))) {
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node->disconnect(SceneStringNames::get_singleton()->ready, callable_mp(this, &MultiplayerSpawner::_node_ready));
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}
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get_multiplayer()->despawn(node, this);
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}
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tracked_nodes.clear();
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}
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}
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void MultiplayerSpawner::_node_added(Node *p_node) {
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if (!get_multiplayer()->has_multiplayer_peer() || !is_multiplayer_authority()) {
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return;
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}
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if (tracked_nodes.has(p_node->get_instance_id())) {
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return;
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}
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const Node *parent = get_spawn_node();
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if (!parent || p_node->get_parent() != parent) {
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return;
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}
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int id = get_scene_id(p_node->get_scene_file_path());
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if (id == INVALID_ID) {
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return;
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}
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const String name = p_node->get_name();
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ERR_FAIL_COND_MSG(name.validate_node_name() != name, vformat("Unable to auto-spawn node with reserved name: %s. Make sure to add your replicated scenes via 'add_child(node, true)' to produce valid names.", name));
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_track(p_node, Variant(), id);
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}
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void MultiplayerSpawner::set_auto_spawning(bool p_enabled) {
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auto_spawn = p_enabled;
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_update_spawn_node();
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}
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bool MultiplayerSpawner::is_auto_spawning() const {
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return auto_spawn;
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}
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TypedArray<PackedScene> MultiplayerSpawner::get_spawnable_scenes() {
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return spawnable_scenes;
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}
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void MultiplayerSpawner::set_spawnable_scenes(TypedArray<PackedScene> p_scenes) {
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spawnable_scenes = p_scenes;
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}
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NodePath MultiplayerSpawner::get_spawn_path() const {
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return spawn_path;
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}
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void MultiplayerSpawner::set_spawn_path(const NodePath &p_path) {
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spawn_path = p_path;
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_update_spawn_node();
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}
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void MultiplayerSpawner::_track(Node *p_node, const Variant &p_argument, int p_scene_id) {
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ObjectID oid = p_node->get_instance_id();
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if (!tracked_nodes.has(oid)) {
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tracked_nodes[oid] = SpawnInfo(p_argument.duplicate(true), p_scene_id);
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p_node->connect(SceneStringNames::get_singleton()->tree_exiting, callable_mp(this, &MultiplayerSpawner::_node_exit), varray(p_node->get_instance_id()), CONNECT_ONESHOT);
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p_node->connect(SceneStringNames::get_singleton()->ready, callable_mp(this, &MultiplayerSpawner::_node_ready), varray(p_node->get_instance_id()), CONNECT_ONESHOT);
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}
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}
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void MultiplayerSpawner::_node_ready(ObjectID p_id) {
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get_multiplayer()->spawn(ObjectDB::get_instance(p_id), this);
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}
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void MultiplayerSpawner::_node_exit(ObjectID p_id) {
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Node *node = Object::cast_to<Node>(ObjectDB::get_instance(p_id));
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ERR_FAIL_COND(!node);
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if (tracked_nodes.has(p_id)) {
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tracked_nodes.erase(p_id);
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get_multiplayer()->despawn(node, this);
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}
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}
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int MultiplayerSpawner::get_scene_id(const String &p_scene) const {
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for (int i = 0; i < spawnable_scenes.size(); i++) {
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Ref<PackedScene> ps = spawnable_scenes[i];
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ERR_CONTINUE(ps.is_null());
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if (ps->get_path() == p_scene) {
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return i;
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}
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}
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return INVALID_ID;
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}
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int MultiplayerSpawner::get_spawn_id(const ObjectID &p_id) const {
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const SpawnInfo *info = tracked_nodes.getptr(p_id);
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return info ? info->id : INVALID_ID;
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}
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const Variant MultiplayerSpawner::get_spawn_argument(const ObjectID &p_id) const {
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const SpawnInfo *info = tracked_nodes.getptr(p_id);
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return info ? info->args : Variant();
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}
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Node *MultiplayerSpawner::instantiate_scene(int p_id) {
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ERR_FAIL_COND_V_MSG(spawn_limit && spawn_limit <= tracked_nodes.size(), nullptr, "Spawn limit reached!");
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ERR_FAIL_INDEX_V(p_id, spawnable_scenes.size(), nullptr);
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Ref<PackedScene> scene = spawnable_scenes[p_id];
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ERR_FAIL_COND_V(scene.is_null(), nullptr);
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return scene->instantiate();
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}
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Node *MultiplayerSpawner::instantiate_custom(const Variant &p_data) {
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ERR_FAIL_COND_V_MSG(spawn_limit && spawn_limit <= tracked_nodes.size(), nullptr, "Spawn limit reached!");
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Object *obj = nullptr;
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Node *node = nullptr;
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if (GDVIRTUAL_CALL(_spawn_custom, p_data, obj)) {
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node = Object::cast_to<Node>(obj);
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}
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return node;
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}
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Node *MultiplayerSpawner::spawn(const Variant &p_data) {
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ERR_FAIL_COND_V(!is_inside_tree() || !get_multiplayer()->has_multiplayer_peer() || !is_multiplayer_authority(), nullptr);
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ERR_FAIL_COND_V_MSG(spawn_limit && spawn_limit <= tracked_nodes.size(), nullptr, "Spawn limit reached!");
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ERR_FAIL_COND_V_MSG(!GDVIRTUAL_IS_OVERRIDDEN(_spawn_custom), nullptr, "Custom spawn requires the '_spawn_custom' virtual method to be implemented via script.");
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Node *parent = get_spawn_node();
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ERR_FAIL_COND_V_MSG(!parent, nullptr, "Cannot find spawn node.");
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Node *node = instantiate_custom(p_data);
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ERR_FAIL_COND_V_MSG(!node, nullptr, "The '_spawn_custom' implementation must return a valid Node.");
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_track(node, p_data);
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parent->add_child(node, true);
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return node;
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}
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