Struct Transform 

pub struct Transform {
    pub absolute: Vec2,
    pub size: Vec2,
    pub baseline_y: Option<f32>,
}

Layout-resolved absolute position and size in logical pixels.

• Written by the LayoutSync stage and read by Render.
• Mutate via Style; the layout engine recomputes Transform.

Fields

absolute: Vec2

Absolute origin (top-left) in window coordinates.

size: Vec2

Computed size.

baseline_y: Option<f32>

First-line text baseline y-offset from absolute.y (W5.9). Some(y) for text leaves that report a baseline from the shaper / measure function. None for non-text leaves and for text that hasn’t been measured yet.

Consumed by FlexAlign::Baseline sibling alignment and by AccessKit’s text-position reporting. The taffy backend reads this to wire taffy::compute_layout_with_measure’s baseline callback; the renderer uses it to align mixed-size inline runs.

Implementations

impl Transform

pub fn new(absolute: Vec2, size: Vec2) -> Self

Construct a Transform with baseline_y = None. Most spawn sites use this; text leaves overwrite baseline_y later from the measure-fn output.

Trait Implementations

impl Clone for Transform

fn clone(&self) -> Transform

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Component for Transform

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 Transform

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

Formats the value using the given formatter.

impl Default for Transform

fn default() -> Transform

Returns the “default value” for a type.

impl From<(Vec2, Vec2)> for Transform

fn from((absolute, size): (Vec2, Vec2)) -> Self

Converts to this type from the input type.

impl PartialEq for Transform

fn eq(&self, other: &Transform) -> 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 Transform

impl StructuralPartialEq for Transform