bevy/crates/bevy_transform/src/bundles.rs
Joona Aalto 39d6a745d2
Migrate visibility to required components (#15474)
# Objective

The next step in the migration to required components: Deprecate
`VisibilityBundle` and make `Visibility` require `InheritedVisibility`
and `ViewVisibility`, as per the [chosen
proposal](https://hackmd.io/@bevy/required_components/%2FcO7JPSAQR5G0J_j5wNwtOQ).

## Solution

Deprecate `VisibilityBundle` and make `Visibility` require
`InheritedVisibility` and `ViewVisibility`.

I chose not to deprecate `SpatialBundle` yet, as doing so would mean
that we need to manually add `Visibility` to a bunch of places. It will
be nicer once meshes, sprites, lights, fog, and cameras have been
migrated, since they will require `Transform` and `Visibility` and
therefore not need manually added defaults for them.

---

## Migration Guide

Replace all insertions of `VisibilityBundle` with the `Visibility`
component. The other components required by it will now be inserted
automatically.
2024-09-27 19:06:16 +00:00

66 lines
2.5 KiB
Rust

#![expect(deprecated)]
use bevy_ecs::bundle::Bundle;
use crate::prelude::{GlobalTransform, Transform};
/// A [`Bundle`] of the [`Transform`] and [`GlobalTransform`]
/// [`Component`](bevy_ecs::component::Component)s, which describe the position of an entity.
///
/// * To place or move an entity, you should set its [`Transform`].
/// * To get the global transform of an entity, you should get its [`GlobalTransform`].
/// * For transform hierarchies to work correctly, you must have both a [`Transform`] and a [`GlobalTransform`].
/// * ~You may use the [`TransformBundle`] to guarantee this.~
/// [`TransformBundle`] is now deprecated.
/// [`GlobalTransform`] is automatically inserted whenever [`Transform`] is inserted.
///
/// ## [`Transform`] and [`GlobalTransform`]
///
/// [`Transform`] is the position of an entity relative to its parent position, or the reference
/// frame if it doesn't have a parent.
///
/// [`GlobalTransform`] is the position of an entity relative to the reference frame.
///
/// [`GlobalTransform`] is updated from [`Transform`] by systems in the system set
/// [`TransformPropagate`](crate::TransformSystem::TransformPropagate).
///
/// This system runs during [`PostUpdate`](bevy_app::PostUpdate). If you
/// update the [`Transform`] of an entity in this schedule or after, you will notice a 1 frame lag
/// before the [`GlobalTransform`] is updated.
#[derive(Clone, Copy, Debug, Default, Bundle)]
#[deprecated(
since = "0.15.0",
note = "Use the `Transform` component instead. Inserting `Transform` will now also insert a `GlobalTransform` automatically."
)]
pub struct TransformBundle {
/// The transform of the entity.
pub local: Transform,
/// The global transform of the entity.
pub global: GlobalTransform,
}
impl TransformBundle {
/// An identity [`TransformBundle`] with no translation, rotation, and a scale of 1 on all axes.
pub const IDENTITY: Self = TransformBundle {
local: Transform::IDENTITY,
global: GlobalTransform::IDENTITY,
};
/// Creates a new [`TransformBundle`] from a [`Transform`].
///
/// This initializes [`GlobalTransform`] as identity, to be updated later by the
/// [`bevy_app::PostUpdate`] schedule.
#[inline]
pub const fn from_transform(transform: Transform) -> Self {
TransformBundle {
local: transform,
..Self::IDENTITY
}
}
}
impl From<Transform> for TransformBundle {
#[inline]
fn from(transform: Transform) -> Self {
Self::from_transform(transform)
}
}