Function bevy_render::camera::camera_system
source · pub fn camera_system<T: CameraProjection + Component>(
window_resized_events: EventReader<'_, '_, WindowResized>,
window_created_events: EventReader<'_, '_, WindowCreated>,
window_scale_factor_changed_events: EventReader<'_, '_, WindowScaleFactorChanged>,
image_asset_events: EventReader<'_, '_, AssetEvent<Image>>,
primary_window: Query<'_, '_, Entity, With<PrimaryWindow>>,
windows: Query<'_, '_, (Entity, &Window)>,
images: Res<'_, Assets<Image>>,
manual_texture_views: Res<'_, ManualTextureViews>,
cameras: Query<'_, '_, (&mut Camera, &mut T)>
)
Expand description
System in charge of updating a Camera
when its window or projection changes.
The system detects window creation, resize, and scale factor change events to update the camera
projection if needed. It also queries any CameraProjection
component associated with the same
entity as the Camera
one, to automatically update the camera projection matrix.
The system function is generic over the camera projection type, and only instances of
OrthographicProjection
and PerspectiveProjection
are automatically added to
the app, as well as the runtime-selected Projection
.
The system runs during PostUpdate
.
§World Resources
Res<Assets<Image>>
– For cameras that render to an image, this resource is used to
inspect information about the render target. This system will not access any other image assets.