Struct Selection 

pub struct Selection {
    pub entities: Vec<EntityId>,
}

A snapshot of entities selected by a Flow for the current tick.

Passed from Flow::select to Flow::adapt and Flow::project. The Flow is free to attach its own per-domain payload by extending this struct, or to keep it as just an entity list.

Fields

entities: Vec<EntityId>

Entity IDs deemed relevant for this domain this tick.

Implementations

impl Selection

pub fn new() -> Self

Creates an empty selection.

pub fn from_entities(entities: Vec<EntityId>) -> Self

Creates a selection from a pre-built entity list.

pub fn len(&self) -> usize

Number of selected entities.

pub fn is_empty(&self) -> bool

Whether the selection is empty.

Trait Implementations

impl Clone for Selection

fn clone(&self) -> Selection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Selection

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

Formats the value using the given formatter.

impl Default for Selection

fn default() -> Selection

Returns the “default value” for a type.