khora_data/ecs/components/
children.rs

1// Copyright 2025 eraflo
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use crate::ecs::{Component, EntityId};
16
17/// A component that lists the direct children of an entity.
18///
19/// This component is typically attached to a parent entity and contains a list
20/// of all `EntityId`s that have this entity as their `Parent`. It is primarily
21/// used for traversing the scene hierarchy downwards (from parent to child).
22///
23/// Note: This component should be managed by a dedicated hierarchy maintenance
24/// system to ensure it stays in sync with `Parent` components on child entities.
25#[derive(Debug, Clone, Default, PartialEq, Eq)]
26pub struct Children(pub Vec<EntityId>);
27
28impl Component for Children {}