Struct BufferFromEntity<T>

Namespace: Unity.Entities

Syntax

[NativeContainer]
public struct BufferFromEntity<T>
    where T : struct, IBufferElementData

Type Parameters

Name	Description
T

Properties

Item[Entity]

Declaration

public DynamicBuffer<T> this[Entity entity] { get; }

Parameters

Type	Name	Description
Entity	entity

Property Value

Type	Description
DynamicBuffer<T>

Methods

DidChange(Entity, UInt32)

Reports whether any of IBufferElementData components of the type T, in the chunk containing the specified Entity, could have changed.

Declaration

public bool DidChange(Entity entity, uint version)

Parameters

Type	Name	Description
Entity	entity	The entity.
UInt32	version	The version to compare. In a system, this parameter should be set to the current LastSystemVersion at the time the job is run or scheduled.

Returns

Type	Description
Boolean	True, if the version number stored in the chunk for this component is more recent than the version passed to the version parameter.

Remarks

Note that for efficiency, the change version applies to whole chunks not individual entities. The change version is incremented even when another job or system that has declared write access to a component does not actually change the component value.

HasComponent(Entity)

Reports whether the specified Entity instance still refers to a valid entity and that it has a buffer component of type T.

Declaration

public bool HasComponent(Entity entity)

Parameters

Type	Name	Description
Entity	entity	The entity.

Returns

Type	Description
Boolean	True if the entity has a buffer component of type T, and false if it does not. Also returns false if the Entity instance refers to an entity that has been destroyed.

Remarks

To report if the provided entity has a buffer component of type T, this function confirms whether the EntityArchetype of the provided entity includes buffer components of type T.