khora_data/ecs/components/
parent.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 establishes a parent-child relationship.
18///
19/// When an entity has a `Parent` component, its transform is considered
20/// relative to the transform of the entity specified by the `EntityId`.
21/// This is the foundational component for building scene hierarchies.
22#[derive(Debug, Clone, Copy, PartialEq, Eq)]
23pub struct Parent(pub EntityId);
24
25impl Component for Parent {}