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limboai/bt/bt_player.cpp

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/**
* bt_player.cpp
* =============================================================================
* Copyright 2021-2024 Serhii Snitsaruk
*
* Use of this source code is governed by an MIT-style
* license that can be found in the LICENSE file or at
* https://opensource.org/licenses/MIT.
* =============================================================================
*/
#include "bt_player.h"
#include "../util/limbo_compat.h"
#include "../util/limbo_string_names.h"
#ifdef LIMBOAI_MODULE
#include "core/config/engine.h"
#include "core/debugger/engine_debugger.h"
#include "core/error/error_macros.h"
#include "core/io/resource_loader.h"
#include "core/object/class_db.h"
#include "core/os/memory.h"
#include "core/string/string_name.h"
#include "core/variant/variant.h"
#include "main/performance.h"
#define IS_DEBUGGER_ACTIVE() (EngineDebugger::is_active())
#define GET_TICKS_USEC() (OS::get_singleton()->get_ticks_usec())
#endif // ! LIMBOAI_MODULE
#ifdef LIMBOAI_GDEXTENSION
#include <godot_cpp/classes/engine_debugger.hpp>
#include <godot_cpp/classes/performance.hpp>
#include <godot_cpp/classes/time.hpp>
#define IS_DEBUGGER_ACTIVE() (EngineDebugger::get_singleton()->is_active())
#define GET_TICKS_USEC() (Time::get_singleton()->get_ticks_usec())
#endif // ! LIMBOAI_GDEXTENSION
VARIANT_ENUM_CAST(BTPlayer::UpdateMode);
void BTPlayer::_load_tree() {
bt_instance.unref();
ERR_FAIL_COND_MSG(!behavior_tree.is_valid(), "BTPlayer: Initialization failed - needs a valid behavior tree.");
ERR_FAIL_COND_MSG(!behavior_tree->get_root_task().is_valid(), "BTPlayer: Initialization failed - behavior tree has no valid root task.");
Node *agent = GET_NODE(this, agent_node);
ERR_FAIL_NULL_MSG(agent, vformat("BTPlayer: Initialization failed - can't get agent with path '%s'.", agent_node));
Node *scene_root = get_owner();
ERR_FAIL_NULL_MSG(scene_root, "BTPlayer: Initialization failed - can't get scene root (make sure the BTPlayer's owner property is set).");
bt_instance = behavior_tree->instantiate(agent, blackboard, this);
#ifdef DEBUG_ENABLED
bt_instance->set_monitor_performance(monitor_performance);
bt_instance->register_with_debugger();
#endif // DEBUG_ENABLED
}
void BTPlayer::_update_blackboard_plan() {
if (blackboard_plan.is_null()) {
blackboard_plan = Ref<BlackboardPlan>(memnew(BlackboardPlan));
} else if (!RESOURCE_IS_BUILT_IN(blackboard_plan)) {
WARN_PRINT_ED("BTPlayer: Using external resource for derived blackboard plan is not supported. Converted to built-in resource.");
blackboard_plan = blackboard_plan->duplicate();
}
blackboard_plan->set_base_plan(behavior_tree.is_valid() ? behavior_tree->get_blackboard_plan() : nullptr);
}
void BTPlayer::set_behavior_tree(const Ref<BehaviorTree> &p_tree) {
if (Engine::get_singleton()->is_editor_hint()) {
if (behavior_tree.is_valid() && behavior_tree->is_connected(LW_NAME(plan_changed), callable_mp(this, &BTPlayer::_update_blackboard_plan))) {
behavior_tree->disconnect(LW_NAME(plan_changed), callable_mp(this, &BTPlayer::_update_blackboard_plan));
}
if (p_tree.is_valid()) {
p_tree->connect(LW_NAME(plan_changed), callable_mp(this, &BTPlayer::_update_blackboard_plan));
}
behavior_tree = p_tree;
_update_blackboard_plan();
} else {
behavior_tree = p_tree;
if (get_owner()) {
_load_tree();
}
}
}
void BTPlayer::set_agent_node(const NodePath &p_agent_node) {
agent_node = p_agent_node;
if (bt_instance.is_valid()) {
ERR_PRINT("BTPlayer: Agent node cannot be set after the behavior tree is instantiated. This change will not affect the behavior tree instance.");
}
}
void BTPlayer::set_blackboard_plan(const Ref<BlackboardPlan> &p_plan) {
blackboard_plan = p_plan;
_update_blackboard_plan();
}
void BTPlayer::set_update_mode(UpdateMode p_mode) {
update_mode = p_mode;
set_active(active);
}
void BTPlayer::set_active(bool p_active) {
active = p_active;
bool is_not_editor = !Engine::get_singleton()->is_editor_hint();
set_process(update_mode == UpdateMode::IDLE && active && is_not_editor);
set_physics_process(update_mode == UpdateMode::PHYSICS && active && is_not_editor);
set_process_input(active && is_not_editor);
}
void BTPlayer::update(double p_delta) {
if (!bt_instance.is_valid()) {
ERR_PRINT_ONCE(vformat("BTPlayer doesn't have a behavior tree with a valid root task to execute (owner: %s)", get_owner()));
return;
}
if (active) {
bt_instance->update(p_delta);
}
}
void BTPlayer::restart() {
ERR_FAIL_COND_MSG(bt_instance.is_null(), "BTPlayer: Restart failed - no valid tree instance. Make sure the BTPlayer has a valid behavior tree with a valid root task.");
bt_instance->get_root_task()->abort();
set_active(true);
}
#ifdef DEBUG_ENABLED
void BTPlayer::_set_monitor_performance(bool p_monitor_performance) {
monitor_performance = p_monitor_performance;
if (bt_instance.is_valid()) {
bt_instance->set_monitor_performance(monitor_performance);
}
}
#endif // ! DEBUG_ENABLED
void BTPlayer::_notification(int p_notification) {
switch (p_notification) {
case NOTIFICATION_PROCESS: {
Variant time = get_process_delta_time();
update(time);
} break;
case NOTIFICATION_PHYSICS_PROCESS: {
Variant time = get_physics_process_delta_time();
update(time);
} break;
case NOTIFICATION_READY: {
if (!Engine::get_singleton()->is_editor_hint()) {
if (blackboard.is_null()) {
blackboard = Ref<Blackboard>(memnew(Blackboard));
}
if (blackboard_plan.is_valid()) {
blackboard_plan->populate_blackboard(blackboard, false, this);
}
if (behavior_tree.is_valid()) {
_load_tree();
}
} else {
_update_blackboard_plan();
}
set_active(active);
} break;
case NOTIFICATION_ENTER_TREE: {
#ifdef DEBUG_ENABLED
if (bt_instance.is_valid()) {
bt_instance->set_monitor_performance(monitor_performance);
}
#endif // DEBUG_ENABLED
} break;
case NOTIFICATION_EXIT_TREE: {
#ifdef DEBUG_ENABLED
if (bt_instance.is_valid()) {
bt_instance->set_monitor_performance(false);
}
#endif // DEBUG_ENABLED
if (Engine::get_singleton()->is_editor_hint()) {
if (behavior_tree.is_valid() && behavior_tree->is_connected(LW_NAME(plan_changed), callable_mp(this, &BTPlayer::_update_blackboard_plan))) {
behavior_tree->disconnect(LW_NAME(plan_changed), callable_mp(this, &BTPlayer::_update_blackboard_plan));
}
}
} break;
}
}
void BTPlayer::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_behavior_tree", "behavior_tree"), &BTPlayer::set_behavior_tree);
ClassDB::bind_method(D_METHOD("get_behavior_tree"), &BTPlayer::get_behavior_tree);
ClassDB::bind_method(D_METHOD("set_agent_node", "agent_node"), &BTPlayer::set_agent_node);
ClassDB::bind_method(D_METHOD("get_agent_node"), &BTPlayer::get_agent_node);
ClassDB::bind_method(D_METHOD("set_update_mode", "update_mode"), &BTPlayer::set_update_mode);
ClassDB::bind_method(D_METHOD("get_update_mode"), &BTPlayer::get_update_mode);
ClassDB::bind_method(D_METHOD("set_active", "active"), &BTPlayer::set_active);
ClassDB::bind_method(D_METHOD("get_active"), &BTPlayer::get_active);
ClassDB::bind_method(D_METHOD("set_blackboard", "blackboard"), &BTPlayer::set_blackboard);
ClassDB::bind_method(D_METHOD("get_blackboard"), &BTPlayer::get_blackboard);
ClassDB::bind_method(D_METHOD("set_blackboard_plan", "plan"), &BTPlayer::set_blackboard_plan);
ClassDB::bind_method(D_METHOD("get_blackboard_plan"), &BTPlayer::get_blackboard_plan);
ClassDB::bind_method(D_METHOD("update", "delta"), &BTPlayer::update);
ClassDB::bind_method(D_METHOD("restart"), &BTPlayer::restart);
ClassDB::bind_method(D_METHOD("get_bt_instance"), &BTPlayer::get_bt_instance);
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "behavior_tree", PROPERTY_HINT_RESOURCE_TYPE, "BehaviorTree"), "set_behavior_tree", "get_behavior_tree");
ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "agent_node"), "set_agent_node", "get_agent_node");
ADD_PROPERTY(PropertyInfo(Variant::INT, "update_mode", PROPERTY_HINT_ENUM, "Idle,Physics,Manual"), "set_update_mode", "get_update_mode");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "active"), "set_active", "get_active");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "blackboard", PROPERTY_HINT_NONE, "Blackboard", 0), "set_blackboard", "get_blackboard");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "blackboard_plan", PROPERTY_HINT_RESOURCE_TYPE, "BlackboardPlan", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT | PROPERTY_USAGE_ALWAYS_DUPLICATE), "set_blackboard_plan", "get_blackboard_plan");
BIND_ENUM_CONSTANT(IDLE);
BIND_ENUM_CONSTANT(PHYSICS);
BIND_ENUM_CONSTANT(MANUAL);
ADD_SIGNAL(MethodInfo("behavior_tree_finished", PropertyInfo(Variant::INT, "status")));
ADD_SIGNAL(MethodInfo("updated", PropertyInfo(Variant::INT, "status")));
#ifdef DEBUG_ENABLED
ClassDB::bind_method(D_METHOD("_set_monitor_performance", "enable"), &BTPlayer::_set_monitor_performance);
ClassDB::bind_method(D_METHOD("_get_monitor_performance"), &BTPlayer::_get_monitor_performance);
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "monitor_performance"), "_set_monitor_performance", "_get_monitor_performance");
#endif // DEBUG_ENABLED
}
BTPlayer::BTPlayer() {
blackboard = Ref<Blackboard>(memnew(Blackboard));
agent_node = LW_NAME(node_pp);
}
BTPlayer::~BTPlayer() {
}
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