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Core: Add Node::iterate_children as a fast way to iterate a node's children, without needing allocations or get_child.

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Adds `Iterable` class to templates.
This commit is contained in:
Lukas Tenbrink
2025-06-10 18:43:25 +02:00
parent 6f2ab528ca
commit 175c38d0dc
4 changed files with 101 additions and 13 deletions
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20
scene/main/node.cpp
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@@ -1781,6 +1781,26 @@ void Node::_update_children_cache_impl() const {
data.children_cache_dirty = false;
}
template <bool p_include_internal>
Iterable<Node::ChildrenIterator> Node::iterate_children() const {
// The thread guard is omitted for performance reasons.
// ERR_THREAD_GUARD_V(Iterable<ChildrenIterator>(nullptr, nullptr));
_update_children_cache();
const uint32_t size = data.children_cache.size();
// Might be null, but then size and internal counts are also 0.
Node **ptr = data.children_cache.ptr();
if constexpr (p_include_internal) {
return Iterable(ChildrenIterator(ptr), ChildrenIterator(ptr + size));
} else {
return Iterable(ChildrenIterator(ptr + data.internal_children_front_count_cache), ChildrenIterator(ptr + size - data.internal_children_back_count_cache));
}
}
template Iterable<Node::ChildrenIterator> Node::iterate_children<true>() const;
template Iterable<Node::ChildrenIterator> Node::iterate_children<false>() const;
int Node::get_child_count(bool p_include_internal) const {
ERR_THREAD_GUARD_V(0);
if (p_include_internal) {