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Add 'modules/behaviour_nodes/' from commit 'd51f4da2a9'

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git-subtree-dir: modules/behaviour_nodes
git-subtree-mainline: 07d69bf55e
git-subtree-split: d51f4da2a9
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Sara Gerretsen 2026-04-25 19:07:05 +02:00
commit 5c8fb517a0
17 changed files with 560 additions and 0 deletions
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58
modules/behaviour_nodes/behaviour_tree.cpp Normal file
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#include "behaviour_tree.h"
#include "behaviour_nodes/behaviour_composite.h"
#include "behaviour_nodes/behaviour_node.h"
#include "core/config/engine.h"
#include "core/object/class_db.h"
#include "core/object/object.h"
#include "core/variant/typed_array.h"
void BehaviourTree::_bind_methods() {
ADD_SIGNAL(MethodInfo("current_behaviour_changed", PropertyInfo(Variant::OBJECT, "new_behaviour", PROPERTY_HINT_NODE_TYPE, "BehaviourNode")));
}
void BehaviourTree::process() {
do {
this->current->execute();
} while (execute_next());
}
void BehaviourTree::_notification(int what) {
if (Engine::get_singleton()->is_editor_hint()) {
return;
}
switch (what) {
default:
return;
case NOTIFICATION_READY:
for (Variant var : get_children()) {
if ((this->root = cast_to<BehaviourNode>(var))) {
this->current = this->root;
break;
}
}
ERR_FAIL_COND_EDMSG(this->root == nullptr, "No valid BehaviourNode in BehaviourTree");
set_process(true);
return;
case NOTIFICATION_PROCESS:
process();
return;
}
}
bool BehaviourTree::execute_next() {
BehaviourNode *next{ this->current->get_next() };
if (next == this->current) {
return false;
} else {
ERR_FAIL_COND_V_EDMSG(next == nullptr, false, vformat("%s::get_next returned a nullptr, repeating last node", this->current->get_class()));
if (this->current != next->get_parent()) {
this->current->exit();
}
if (this->current->get_parent() != next) {
next->enter();
emit_signal("current_behaviour_changed", next);
}
this->current = next;
return this->current != this->root && (cast_to<BehaviourComposite>(this->current) || this->current->get_status() != BehaviourNode::Running);
}
}