Struct Entity 

pub struct Entity {
    pub index: u32,
    pub generation: u32,
}

A lightweight generational handle identifying a live entity.

index is the slot in the allocator; generation differentiates reused slots so stale handles can be detected.

Fields

index: u32

Slot index.

generation: u32

Generation counter (incremented on free).

Implementations

impl Entity

pub fn from_raw(index: u32, generation: u32) -> Self

Constructs an entity from raw parts.

pub fn null() -> Self

Returns the null sentinel (never alive).

pub fn is_null(self) -> bool

True if this is the null sentinel.

Trait Implementations

impl Clone for Entity

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Entity

impl Debug for Entity

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

Formats the value using the given formatter.

impl Display for Entity

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

Formats the value using the given formatter.

impl Eq for Entity

impl Hash for Entity

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Entity

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Entity

impl WorldQuery for Entity

type Item<'w> = Entity

The type yielded per entity.

fn required_types() -> Vec<TypeId>

Required component TypeIds (must all be present in the archetype).

fn matches(_: &Archetype) -> bool

true if arch satisfies this query.

unsafe fn fetch<'w>(a: &'w Archetype, row: usize) -> Entity

Fetches the item for row in arch.