Struct ExtractedOpacityGroup 

pub struct ExtractedOpacityGroup {
    pub alpha: f32,
    pub start_order: PaintOrder,
    pub end_order: PaintOrder,
    pub key: u64,
}

One element whose paints composite as a single layer that fades as a whole: CSS group opacity.

• Emitted for an element with Opacity below one that has a visible child in its own paint band. Its own paints and its descendants’ paint at full alpha into the layer, and the layer composites at alpha when it closes, so a child over its parent hides the parent the way it would at full opacity, and the two fade once, together.
• An element with no such child folds its opacity into its own paints instead; nothing of its own overlaps anything else of its own by more than a border or a text run, and a layer costs a pass.

Fields

alpha: f32

The element’s own Opacity, in [0, 1).

start_order: PaintOrder

Paint-order key at which the layer opens: the slot under the element’s own PaintOrder that its drop shadows take, so they fade with the element.

end_order: PaintOrder

Paint-order key at which the layer closes - the maximum PaintOrder across the element and its descendants in the same paint band, as for an ExtractedClipBox.

key: u64

The faded element’s identity, the same every frame, so a renderer can keep the group’s layer from one frame to the next (crate::node_ir::Node::Opacity’s key).

Trait Implementations

impl Clone for ExtractedOpacityGroup

fn clone(&self) -> ExtractedOpacityGroup

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Component for ExtractedOpacityGroup

where Self: Send + Sync + 'static,

const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::Table

A constant indicating the storage type used for this component.

type Mutability = Mutable

A marker type to assist Bevy with determining if this component is mutable, or immutable. Mutable components will have Component<Mutability = Mutable>, while immutable components will instead have Component<Mutability = Immutable>.

fn register_required_components( _requiree: ComponentId, required_components: &mut RequiredComponentsRegistrator<'_, '_>, )

Registers required components.

fn clone_behavior() -> ComponentCloneBehavior

Called when registering this component, allowing to override clone function (or disable cloning altogether) for this component.

fn relationship_accessor() -> Option<ComponentRelationshipAccessor<Self>>

Returns [ComponentRelationshipAccessor] required for working with relationships in dynamic contexts.

fn on_add() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_add [ComponentHook] for this Component if one is defined.

fn on_insert() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_insert [ComponentHook] for this Component if one is defined.

fn on_discard() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_discard [ComponentHook] for this Component if one is defined.

fn on_remove() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_remove [ComponentHook] for this Component if one is defined.

fn on_despawn() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_despawn [ComponentHook] for this Component if one is defined.

fn map_entities<E>(_this: &mut Self, _mapper: &mut E)

where E: EntityMapper,

Maps the entities on this component using the given EntityMapper. This is used to remap entities in contexts like scenes and entity cloning. When deriving Component, this is populated by annotating fields containing entities with #[entities]

impl Debug for ExtractedOpacityGroup

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for ExtractedOpacityGroup

fn eq(&self, other: &ExtractedOpacityGroup) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ExtractedOpacityGroup

impl StructuralPartialEq for ExtractedOpacityGroup