13da481bea
# Objective Add methods to `Query<&Children>` and `Query<&Parent>` to iterate over descendants and ancestors, respectively. ## Changelog * Added extension trait for `Query` in `bevy_hierarchy`, `HierarchyQueryExt` * Added method `iter_descendants` to `Query<&Children>` via `HierarchyQueryExt` for iterating over the descendants of an entity. * Added method `iter_ancestors` to `Query<&Parent>` via `HierarchyQueryExt` for iterating over the ancestors of an entity. Co-authored-by: devil-ira <justthecooldude@gmail.com>
47 lines
1.0 KiB
Rust
47 lines
1.0 KiB
Rust
#![warn(missing_docs)]
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//! `bevy_hierarchy` can be used to define hierarchies of entities.
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//!
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//! Most commonly, these hierarchies are used for inheriting `Transform` values
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//! from the [`Parent`] to its [`Children`].
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mod components;
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pub use components::*;
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mod hierarchy;
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pub use hierarchy::*;
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mod child_builder;
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pub use child_builder::*;
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mod events;
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pub use events::*;
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mod valid_parent_check_plugin;
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pub use valid_parent_check_plugin::*;
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mod query_extension;
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pub use query_extension::*;
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#[doc(hidden)]
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pub mod prelude {
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#[doc(hidden)]
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pub use crate::{
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child_builder::*, components::*, hierarchy::*, query_extension::*, HierarchyPlugin,
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ValidParentCheckPlugin,
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};
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}
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use bevy_app::prelude::*;
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/// The base plugin for handling [`Parent`] and [`Children`] components
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#[derive(Default)]
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pub struct HierarchyPlugin;
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impl Plugin for HierarchyPlugin {
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fn build(&self, app: &mut App) {
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app.register_type::<Children>()
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.register_type::<Parent>()
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.add_event::<HierarchyEvent>();
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}
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}
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