limboai/bt/behavior_tree.cpp

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/**
* behavior_tree.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 "behavior_tree.h"
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#include "../util/limbo_string_names.h"
#ifdef LIMBOAI_MODULE
#include "core/error/error_macros.h"
#include "core/object/class_db.h"
#include "core/templates/list.h"
#include "core/variant/variant.h"
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#endif // ! LIMBOAI_MODULE
#ifdef LIMBOAI_GDEXTENSION
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#include "godot_cpp/core/error_macros.hpp"
#endif // ! LIMBOAI_GDEXTENSION
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void BehaviorTree::set_description(const String &p_value) {
description = p_value;
emit_changed();
}
void BehaviorTree::set_blackboard_plan(const Ref<BlackboardPlan> &p_plan) {
if (blackboard_plan == p_plan) {
return;
}
if (Engine::get_singleton()->is_editor_hint() && blackboard_plan.is_valid() &&
blackboard_plan->is_connected(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed))) {
blackboard_plan->disconnect(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed));
}
blackboard_plan = p_plan;
if (blackboard_plan.is_null()) {
blackboard_plan = Ref<BlackboardPlan>(memnew(BlackboardPlan));
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}
if (Engine::get_singleton()->is_editor_hint()) {
blackboard_plan->connect(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed));
}
_plan_changed();
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}
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void BehaviorTree::set_root_task(const Ref<BTTask> &p_value) {
root_task = p_value;
emit_changed();
}
Ref<BehaviorTree> BehaviorTree::clone() const {
Ref<BehaviorTree> copy = duplicate(false);
copy->set_path("");
if (root_task.is_valid()) {
copy->root_task = root_task->clone();
}
return copy;
}
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void BehaviorTree::copy_other(const Ref<BehaviorTree> &p_other) {
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ERR_FAIL_COND(p_other.is_null());
description = p_other->get_description();
root_task = p_other->get_root_task();
}
Ref<BTTask> BehaviorTree::instantiate(Node *p_agent, const Ref<Blackboard> &p_blackboard, Node *p_scene_root) const {
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ERR_FAIL_COND_V_MSG(root_task == nullptr, memnew(BTTask), "Trying to instance a behavior tree with no valid root task.");
Ref<BTTask> inst = root_task->clone();
inst->initialize(p_agent, p_blackboard, p_scene_root);
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return inst;
}
void BehaviorTree::_plan_changed() {
emit_signal(LW_NAME(plan_changed));
emit_changed();
}
void BehaviorTree::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_description", "description"), &BehaviorTree::set_description);
ClassDB::bind_method(D_METHOD("get_description"), &BehaviorTree::get_description);
ClassDB::bind_method(D_METHOD("set_blackboard_plan", "plan"), &BehaviorTree::set_blackboard_plan);
ClassDB::bind_method(D_METHOD("get_blackboard_plan"), &BehaviorTree::get_blackboard_plan);
ClassDB::bind_method(D_METHOD("set_root_task", "task"), &BehaviorTree::set_root_task);
ClassDB::bind_method(D_METHOD("get_root_task"), &BehaviorTree::get_root_task);
ClassDB::bind_method(D_METHOD("clone"), &BehaviorTree::clone);
ClassDB::bind_method(D_METHOD("copy_other", "other"), &BehaviorTree::copy_other);
ClassDB::bind_method(D_METHOD("instantiate", "agent", "blackboard", "scene_root"), &BehaviorTree::instantiate);
ADD_PROPERTY(PropertyInfo(Variant::STRING, "description", PROPERTY_HINT_MULTILINE_TEXT), "set_description", "get_description");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "blackboard_plan", PROPERTY_HINT_RESOURCE_TYPE, "BlackboardPlan", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT), "set_blackboard_plan", "get_blackboard_plan");
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "root_task", PROPERTY_HINT_RESOURCE_TYPE, "BTTask", PROPERTY_USAGE_NO_EDITOR | PROPERTY_USAGE_INTERNAL), "set_root_task", "get_root_task");
ADD_SIGNAL(MethodInfo("plan_changed"));
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}
BehaviorTree::BehaviorTree() {
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}
BehaviorTree::~BehaviorTree() {
if (Engine::get_singleton()->is_editor_hint() && blackboard_plan.is_valid() &&
blackboard_plan->is_connected(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed))) {
blackboard_plan->disconnect(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed));
}
}