140 lines
5.4 KiB
C++
140 lines
5.4 KiB
C++
/**
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* behavior_tree.cpp
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* =============================================================================
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* Copyright 2021-2024 Serhii Snitsaruk
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*
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* Use of this source code is governed by an MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT.
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* =============================================================================
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*/
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#include "behavior_tree.h"
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#include "../util/limbo_string_names.h"
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#ifdef LIMBOAI_MODULE
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#include "core/error/error_macros.h"
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#include "core/object/class_db.h"
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#include "core/templates/list.h"
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#include "core/variant/variant.h"
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#endif // ! LIMBOAI_MODULE
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#ifdef LIMBOAI_GDEXTENSION
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#include "godot_cpp/core/error_macros.hpp"
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#endif // ! LIMBOAI_GDEXTENSION
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void BehaviorTree::set_description(const String &p_value) {
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description = p_value;
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emit_changed();
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}
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void BehaviorTree::set_blackboard_plan(const Ref<BlackboardPlan> &p_plan) {
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if (blackboard_plan == p_plan) {
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return;
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}
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if (Engine::get_singleton()->is_editor_hint() && blackboard_plan.is_valid() &&
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blackboard_plan->is_connected(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed))) {
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blackboard_plan->disconnect(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed));
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}
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blackboard_plan = p_plan;
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if (blackboard_plan.is_null()) {
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blackboard_plan = Ref<BlackboardPlan>(memnew(BlackboardPlan));
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}
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if (Engine::get_singleton()->is_editor_hint()) {
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blackboard_plan->connect(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed));
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}
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_plan_changed();
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}
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void BehaviorTree::set_root_task(const Ref<BTTask> &p_value) {
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#ifdef TOOLS_ENABLED
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_unset_editor_behavior_tree_hint();
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#endif // TOOLS_ENABLED
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root_task = p_value;
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#ifdef TOOLS_ENABLED
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_set_editor_behavior_tree_hint();
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#endif // TOOLS_ENABLED
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emit_changed();
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}
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Ref<BehaviorTree> BehaviorTree::clone() const {
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Ref<BehaviorTree> copy = duplicate(false);
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copy->set_path("");
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if (root_task.is_valid()) {
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copy->root_task = root_task->clone();
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}
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return copy;
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}
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void BehaviorTree::copy_other(const Ref<BehaviorTree> &p_other) {
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ERR_FAIL_COND(p_other.is_null());
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description = p_other->get_description();
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root_task = p_other->get_root_task();
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}
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Ref<BTInstance> BehaviorTree::instantiate(Node *p_agent, const Ref<Blackboard> &p_blackboard, Node *p_instance_owner, Node *p_custom_scene_root) const {
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ERR_FAIL_COND_V_MSG(root_task == nullptr, nullptr, "BehaviorTree: Instantiation failed - BT has no valid root task.");
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ERR_FAIL_NULL_V_MSG(p_agent, nullptr, "BehaviorTree: Instantiation failed - agent can't be null.");
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ERR_FAIL_NULL_V_MSG(p_instance_owner, nullptr, "BehaviorTree: Instantiation failed -- instance owner can't be null.");
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ERR_FAIL_NULL_V_MSG(p_blackboard, nullptr, "BehaviorTree: Instantiation failed - blackboard can't be null.");
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Node *scene_root = p_custom_scene_root ? p_custom_scene_root : p_instance_owner->get_owner();
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ERR_FAIL_NULL_V_MSG(scene_root, nullptr, "BehaviorTree: Instantiation failed - unable to establish scene root. This is likely due to the instance owner not being owned by a scene node and custom_scene_root being null.");
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Ref<BTTask> root_copy = root_task->clone();
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root_copy->initialize(p_agent, p_blackboard, scene_root);
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return BTInstance::create(root_copy, get_path(), p_instance_owner);
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}
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void BehaviorTree::_plan_changed() {
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emit_signal(LW_NAME(plan_changed));
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emit_changed();
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}
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#ifdef TOOLS_ENABLED
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void BehaviorTree::_set_editor_behavior_tree_hint() {
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if (root_task.is_valid()) {
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root_task->data.behavior_tree_id = this->get_instance_id();
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}
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}
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void BehaviorTree::_unset_editor_behavior_tree_hint() {
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if (root_task.is_valid()) {
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root_task->data.behavior_tree_id = ObjectID();
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}
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}
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#endif // TOOLS_ENABLED
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void BehaviorTree::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_description", "description"), &BehaviorTree::set_description);
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ClassDB::bind_method(D_METHOD("get_description"), &BehaviorTree::get_description);
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ClassDB::bind_method(D_METHOD("set_blackboard_plan", "plan"), &BehaviorTree::set_blackboard_plan);
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ClassDB::bind_method(D_METHOD("get_blackboard_plan"), &BehaviorTree::get_blackboard_plan);
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ClassDB::bind_method(D_METHOD("set_root_task", "task"), &BehaviorTree::set_root_task);
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ClassDB::bind_method(D_METHOD("get_root_task"), &BehaviorTree::get_root_task);
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ClassDB::bind_method(D_METHOD("clone"), &BehaviorTree::clone);
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ClassDB::bind_method(D_METHOD("copy_other", "other"), &BehaviorTree::copy_other);
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ClassDB::bind_method(D_METHOD("instantiate", "agent", "blackboard", "instance_owner", "custom_scene_root"), &BehaviorTree::instantiate, DEFVAL(Variant()));
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ADD_PROPERTY(PropertyInfo(Variant::STRING, "description", PROPERTY_HINT_MULTILINE_TEXT), "set_description", "get_description");
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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");
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ADD_SIGNAL(MethodInfo("plan_changed"));
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}
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BehaviorTree::BehaviorTree() {
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}
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BehaviorTree::~BehaviorTree() {
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if (Engine::get_singleton()->is_editor_hint() && blackboard_plan.is_valid() &&
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blackboard_plan->is_connected(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed))) {
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blackboard_plan->disconnect(LW_NAME(changed), callable_mp(this, &BehaviorTree::_plan_changed));
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}
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}
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