Module bevy::ecs::world

Defines the World and APIs for accessing it directly.

Modules

• error
  Contains error types returned by bevy’s schedule.
• unsafe_world_cell
  Contains types that allow disjoint mutable access to a World.

Structs

• CommandQueue
  Densely and efficiently stores a queue of heterogenous types implementing Command.
• DeferredWorld
  A World reference that disallows structural ECS changes. This includes initializing resources, registering components or spawning entities.
• EntityMut
  Provides mutable access to a single entity and all of its components.
• EntityRef
  A read-only reference to a particular Entity and all of its components.
• EntityWorldMut
  A mutable reference to a particular Entity, and the entire world. This is essentially a performance-optimized (Entity, &mut World) tuple, which caches the EntityLocation to reduce duplicate lookups.
• FilteredEntityMut
  Provides mutable access to a single entity and some of its components defined by the contained Access.
• FilteredEntityRef
  Provides read-only access to a single entity and some of its components defined by the contained Access.
• Mut
  Unique mutable borrow of an entity’s component or of a resource.
• OccupiedEntry
  A view into an occupied entry in a EntityWorldMut. It is part of the Entry enum.
• OnAdd
  Trigger emitted when a component is added to an entity.
• OnInsert
  Trigger emitted when a component is inserted on to to an entity.
• OnRemove
  Trigger emitted when a component is removed from an entity.
• Ref
  Shared borrow of an entity’s component with access to change detection. Similar to Mut but is immutable and so doesn’t require unique access.
• SpawnBatchIter
  An iterator that spawns a series of entities and returns the ID of each spawned entity.
• VacantEntry
  A view into a vacant entry in a EntityWorldMut. It is part of the Entry enum.
• World
  Stores and exposes operations on entities, components, resources, and their associated metadata.
• WorldId
  A unique identifier for a World.

Enums

• Entry
  A view into a single entity and component in a world, which may either be vacant or occupied.

Constants

• CHECK_TICK_THRESHOLD
  The (arbitrarily chosen) minimum number of world tick increments between check_tick scans.
• ON_ADD
  Internal components used by bevy with a fixed component id. Constants are used to skip TypeId lookups in hot paths. ComponentId for OnAdd
• ON_INSERT
  ComponentId for OnInsert
• ON_REMOVE
  ComponentId for OnRemove

Traits

• Command
  A World mutation.
• FromWorld
  Creates an instance of the type this trait is implemented for using data from the supplied World.