Module bevy::ecs

Bevy's entity-component-system.

Modules

bevy_utils
lazy_static	A macro for declaring lazily evaluated statics.
prelude

Macros

impl_query_set
smaller_tuples_too	Imagine macro parameters, but more like those Russian dolls.

Structs

Added	Query transformer that retrieves components of type T that have been added since the start of the frame.
Archetype	A collection of entities having the same component types
ArchetypeComponent
ArchetypesGeneration	Determines freshness of information derived from World::archetypes
AtomicBorrow	Atomically enforces Rust-style borrow checking at runtime
Batch	A sequence of entities yielded by BatchedIter
BatchedIter	Batched version of QueryIter
BuiltEntity	The output of an EntityBuilder, suitable for passing to World::spawn or World::insert
ChainSystem
Changed	Query transformer that retrieves components of type T that have either been mutated or added since the start of the frame.
ChangedRes	A shared borrow of a Resource that will only return in a query if the Resource has been changed
Commands	A list of commands that will be run to populate a World and Resources.
ComponentFlags
Entity	Lightweight unique ID of an entity
EntityBuilder	Helper for incrementally constructing a bundle of components with dynamic component types
EntityMap
EntityReserver	Reserves entities in a way that is usable in multi-threaded contexts.
FetchArcCommands
FetchChangedRes
FetchCommands
FetchLocal
FetchOr
FetchParamTuple
FetchQuery
FetchQuerySet
FetchRes
FetchResMut
FuncSystem
In
InputFuncSystem
Insert
InsertResource
Local	Local resources are unique per-system. Two instances of the same system will each have their own resource. Local resources are automatically initialized using the FromResources trait.
Location	A location of an entity in an archetype
MissingComponent	Error indicating that an entity did not have a required component
Mut	Unique borrow of an entity's component
Mutated	Query transformer that retrieves components of type T that have been mutated since the start of the frame. Added components do not count as mutated.
NoSuchEntity	Error indicating that no entity with a particular ID exists
Or
ParIter	Parallel version of QueryIter
ParallelSystemStageExecutor	Executes the stage in parallel by analyzing system dependencies. System execution order is undefined except under the following conditions:
Query	Provides scoped access to a World according to a given [HecsQuery]
QueryIter	Iterator over the set of entities with the components in Q
QuerySet
Ref	Shared borrow of an entity's component
RefMut	Unique borrow of an entity's component
Res	Shared borrow of a Resource
ResMut	Unique borrow of a Resource
ResourceRef	Shared borrow of an entity's component
ResourceRefMut	Unique borrow of a resource
Resources	A collection of resource instances identified by their type.
RunOnce
Schedule
SerialSystemStageExecutor
SpawnBatchIter	Entity IDs created by World::spawn_batch
State
StateStage
SystemId
SystemStage
SystemState
ThreadLocalSystemFn
TypeAccess	Provides information about the types a [System] reads and writes
TypeInfo	Metadata required to store a component
TypeState	Metadata about a type stored in an archetype
VecResourceStorage
With
Without
World	An unordered collection of entities, each having any number of distinctly typed components
WorldBuilder	Modify a World using the builder pattern

Enums

ComponentError	Errors that arise when accessing components
MapEntitiesError
QueryAccess
QueryError	An error that occurs when using a Query
ResourceIndex
ShouldRun
StageError
StateError
ThreadLocalExecution	Determines the strategy used to run the run_thread_local function in a System

Traits

Bundle	A statically typed collection of components
Command	A World mutation
Component	Types that can be components, implemented automatically for all Send + Sync + 'static types
DynamicBundle	A dynamically typed collection of components
EntityFilter
Fetch	Streaming iterators over contiguous homogeneous ranges of components
FetchSystemParam
FromResources	Creates Self using data from the Resources collection
IntoChainSystem
IntoSystem
MapEntities
QueryFilter
QueryTuple
ReadOnlyFetch	A fetch that is read only. This should only be implemented for read-only fetches.
Resource	A Resource type
ResourcesWriter
Stage
System	An ECS system that can be added to a Schedule
SystemParam
SystemStageExecutor
WorldBuilderSource	Converts a reference to Self to a WorldBuilder
WorldQuery	A collection of component types to fetch from a World

Functions

clear_trackers_system

Derive Macros

Bundle	Implement Bundle for a monomorphic struct
SystemParam