Struct amethyst::ecs::prelude::BitSet

pub struct BitSet { /* fields omitted */ }

A BitSet is a simple set designed to track entity indices for which a certain component exists. It does not track the Generation of the entities that it contains.

Note, a BitSet is limited by design to only 1,048,576 indices. Adding beyond this limit will cause the BitSet to panic.

Methods

impl BitSet

pub fn new() -> BitSet

Creates an empty BitSet.

pub fn with_capacity(max: u32) -> BitSet

Creates an empty BitSet, preallocated for up to max indices.

pub fn add(&mut self, id: u32) -> bool

Adds id to the BitSet. Returns true if the value was already in the set.

pub fn remove(&mut self, id: u32) -> bool

Removes id from the set, returns true if the value was removed, and false if the value was not set to begin with.

pub fn contains(&self, id: u32) -> bool

Returns true if id is in the set.

pub fn clear(&mut self)

Completely wipes out the bit set.

Trait Implementations

impl ParJoin for BitSet

fn par_join(self) -> JoinParIter<Self>

Create a joined parallel iterator over the contents.

impl<'a> ParJoin for &'a BitSet

fn par_join(self) -> JoinParIter<Self>

Create a joined parallel iterator over the contents.

impl<'a> Join for &'a BitSet

type Type = u32

Type of joined components.

type Value = ()

Type of joined storages.

type Mask = &'a BitSet

Type of joined bit mask.

fn open(self) -> (<&'a BitSet as Join>::Mask, <&'a BitSet as Join>::Value)

Open this join by returning the mask and the storages.

unsafe fn get(     &mut <&'a BitSet as Join>::Value,     id: u32 ) -> <&'a BitSet as Join>::Type

Get a joined component value by a given index.

Important traits for JoinIter<J>

impl<J> Iterator for JoinIter<J> where
    J: Join,  type Item = <J as Join>::Type;

fn join(self) -> JoinIter<Self>

Create a joined iterator over the contents.

impl Join for BitSet

type Type = u32

Type of joined components.

type Value = ()

Type of joined storages.

type Mask = BitSet

Type of joined bit mask.

fn open(self) -> (<BitSet as Join>::Mask, <BitSet as Join>::Value)

Open this join by returning the mask and the storages.

unsafe fn get(&mut <BitSet as Join>::Value, id: u32) -> <BitSet as Join>::Type

Get a joined component value by a given index.

Important traits for JoinIter<J>

impl<J> Iterator for JoinIter<J> where
    J: Join,  type Item = <J as Join>::Type;

fn join(self) -> JoinIter<Self>

Create a joined iterator over the contents.

impl<T> BitXor<T> for BitSet where     T: BitSetLike,

type Output = BitSetXor<BitSet, T>

The resulting type after applying the ^ operator.

fn bitxor(self, rhs: T) -> <BitSet as BitXor<T>>::Output

Performs the ^ operation.

impl<'a, T> BitXor<T> for &'a BitSet where     T: BitSetLike,

type Output = BitSetXor<&'a BitSet, T>

The resulting type after applying the ^ operator.

fn bitxor(self, rhs: T) -> <&'a BitSet as BitXor<T>>::Output

Performs the ^ operation.

impl<'a> IntoIterator for &'a BitSet

type Item = <BitIter<&'a BitSet> as Iterator>::Item

The type of the elements being iterated over.

type IntoIter = BitIter<&'a BitSet>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <&'a BitSet as IntoIterator>::IntoIter

Creates an iterator from a value.

impl IntoIterator for BitSet

type Item = <BitIter<BitSet> as Iterator>::Item

The type of the elements being iterated over.

type IntoIter = BitIter<BitSet>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <BitSet as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<'a> FromIterator<&'a u32> for BitSet

fn from_iter<T>(iter: T) -> BitSet where     T: IntoIterator<Item = &'a u32>,

Creates a value from an iterator.

impl FromIterator<u32> for BitSet

fn from_iter<T>(iter: T) -> BitSet where     T: IntoIterator<Item = u32>,

Creates a value from an iterator.

impl<'a, B> BitXorAssign<&'a B> for BitSet where     B: BitSetLike,

fn bitxor_assign(&mut self, lhs: &B)

Performs the ^= operation.

impl Not for BitSet

type Output = BitSetNot<BitSet>

The resulting type after applying the ! operator.

fn not(self) -> <BitSet as Not>::Output

Performs the unary ! operation.

impl<'a> Not for &'a BitSet

type Output = BitSetNot<&'a BitSet>

The resulting type after applying the ! operator.

fn not(self) -> <&'a BitSet as Not>::Output

Performs the unary ! operation.

impl<'a, B> BitOrAssign<&'a B> for BitSet where     B: BitSetLike,

fn bitor_assign(&mut self, lhs: &B)

Performs the |= operation.

impl Default for BitSet

fn default() -> BitSet

Returns the "default value" for a type.

impl BitSetLike for BitSet

fn layer3(&self) -> usize

Return a usize where each bit represents if any word in layer2 has been set.

fn layer2(&self, i: usize) -> usize

Return the usize from the array of usizes that indicates if any bit has been set in layer1

fn layer1(&self, i: usize) -> usize

Return the usize from the array of usizes that indicates if any bit has been set in layer0

fn layer0(&self, i: usize) -> usize

Return a usize that maps to the direct 1:1 association with each index of the set

fn contains(&self, i: u32) -> bool

Allows checking if set bit is contained in the bit set.

fn get_from_layer(&self, layer: usize, idx: usize) -> usize

Gets the usize corresponding to layer and index.

Important traits for BitIter<T>

impl<T> Iterator for BitIter<T> where
    T: BitSetLike,  type Item = u32;

fn iter(self) -> BitIter<Self>

Create an iterator that will scan over the keyspace

fn par_iter(self) -> BitParIter<Self>

Create a parallel iterator that will scan over the keyspace

impl<'a, T> BitAnd<T> for &'a BitSet where     T: BitSetLike,

type Output = BitSetAnd<&'a BitSet, T>

The resulting type after applying the & operator.

fn bitand(self, rhs: T) -> <&'a BitSet as BitAnd<T>>::Output

Performs the & operation.

impl<T> BitAnd<T> for BitSet where     T: BitSetLike,

type Output = BitSetAnd<BitSet, T>

The resulting type after applying the & operator.

fn bitand(self, rhs: T) -> <BitSet as BitAnd<T>>::Output

Performs the & operation.

impl<'a, B> BitAndAssign<&'a B> for BitSet where     B: BitSetLike,

fn bitand_assign(&mut self, lhs: &B)

Performs the &= operation.

impl<'a> Extend<&'a u32> for BitSet

fn extend<T>(&mut self, iter: T) where     T: IntoIterator<Item = &'a u32>,

Extends a collection with the contents of an iterator.

impl Extend<u32> for BitSet

fn extend<T>(&mut self, iter: T) where     T: IntoIterator<Item = u32>,

Extends a collection with the contents of an iterator.

impl<T> BitOr<T> for BitSet where     T: BitSetLike,

type Output = BitSetOr<BitSet, T>

The resulting type after applying the | operator.

fn bitor(self, rhs: T) -> <BitSet as BitOr<T>>::Output

Performs the | operation.

impl<'a, T> BitOr<T> for &'a BitSet where     T: BitSetLike,

type Output = BitSetOr<&'a BitSet, T>

The resulting type after applying the | operator.

fn bitor(self, rhs: T) -> <&'a BitSet as BitOr<T>>::Output

Performs the | operation.

impl Clone for BitSet

fn clone(&self) -> BitSet

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BitSet

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

Formats the value using the given formatter.