Class: SpriteSystem

SpriteSystem handles converting sprites into renderable objects that are fed into a rendering system.

Hierarchy

• ArraySystem

  ↳ SpriteSystem

Table of contents

Constructors

• constructor

Properties

• entities
• messageBus
• scene
• subscriberID
• MESSAGE_DEREGISTER
• MESSAGE_REGISTER
• MESSAGE_UPDATE

Methods

• Destroy
• OnDestroy
• OnMessage
• Update
• register
• remove

Constructors

constructor

+ new SpriteSystem(messageBus: IMessageBus, scene?: IScene, frustumCuller?: IFrustumCuller, renderables?: IRenderable[], entities?: SystemEntity[], subscriberID?: number): SpriteSystem

Parameters:

Name	Type
messageBus	IMessageBus
scene?	IScene
frustumCuller	IFrustumCuller
renderables	IRenderable[]
entities?	SystemEntity[]
subscriberID?	number

Returns: SpriteSystem

Inherited from: ArraySystem

Properties

entities

• Protected entities: SystemEntity[]

The list of entities the system is tracking.

Inherited from: ArraySystem.entities

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messageBus

• Protected messageBus: IMessageBus

Reference to the message bus, the fundamental piece of JamJar for communicating with other parts of the engine.

Inherited from: ArraySystem.messageBus

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scene

• Protected Optional scene: undefined | IScene

Any scene this system is part of, will change the lifecycle of the system to be part of the scene's lifecycle - it will be destroyed when the scene is destroyed.

Inherited from: ArraySystem.scene

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subscriberID

• subscriberID: number

Inherited from: ArraySystem.subscriberID

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MESSAGE_DEREGISTER

▪ Readonly Static MESSAGE_DEREGISTER: stateful_system_deregister= "stateful_system_deregister"

Message to deregister an entity + components with a system so it is no longer tracked.

Inherited from: ArraySystem.MESSAGE_DEREGISTER

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MESSAGE_REGISTER

▪ Readonly Static MESSAGE_REGISTER: stateful_system_register= "stateful_system_register"

Message to register an entity + components with a system so it can be tracked.

Inherited from: ArraySystem.MESSAGE_REGISTER

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MESSAGE_UPDATE

▪ Readonly Static MESSAGE_UPDATE: system_update= "system_update"

Inherited from: ArraySystem.MESSAGE_UPDATE

Methods

Destroy

▸ Destroy(): void

Destroy destroys the System and unsubscribes it from all messages. The System should be garbage collected after this, unless a direct reference to it exists somewhere. Therefore direct references to systems are discouraged; communication should all be through the message bus.

Returns: void

Inherited from: ArraySystem

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OnDestroy

▸ ProtectedOnDestroy(): void

Custom Destroy logic should go here to facilitate garbage collection, for example removing listeners.

Returns: void

Inherited from: ArraySystem

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OnMessage

▸ OnMessage(message: IMessage): void

Parameters:

Name	Type
message	IMessage

Returns: void

Overrides: ArraySystem

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Update

▸ ProtectedUpdate(dt: number): void

General update method, default empty. Override with custom logic.

Parameters:

Name	Type	Description
dt	number	DeltaTime

Returns: void

Inherited from: ArraySystem

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register

▸ Protectedregister(entity: IEntity, components: Component[]): void

Parameters:

Name	Type
entity	IEntity
components	Component[]

Returns: void

Inherited from: ArraySystem

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remove

▸ Protectedremove(entity: IEntity): void

Parameters:

Name	Type
entity	IEntity

Returns: void

Inherited from: ArraySystem