WorldTransform3DSystem class

Keeps every WorldTransform3D current, once per FixedTickEvent.

The 3D counterpart of goo2d's WorldTransformSystem, and the same machinery: it walks the hierarchy top-down through the intrusive Parent.firstChild/Child.nextSibling list the kernel already maintains, starting from roots (no parent, or no Child mixin at all) so a parent is always resolved before its children read it. Each entity's "did anything change" check is a handful of field comparisons against last tick's cached values, not a walk back to the root, so an unchanged subtree is cheap to skip past.

Ordering: any system reading WorldTransform3D should extend its own compareTo to run after this one (other is WorldTransform3DSystem ? 1 : 0). This system does not declare "I run first" unconditionally, because a system with no opinion about ordering should not be silently forced to run after this one just because this one has an opinion about everyone.

Inheritance

• Object
• GameListenerBase
• GameSystem
• WorldTransform3DSystem

Mixed-in types

• FixedTickable
• EntitySpawnListener

Constructors

WorldTransform3DSystem()

Properties

game → Game

The game this system was declared in - state.game, for the declarations that legitimately live there (buffers, state channels, camera views).

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

listensToEvents → bool

Whether this system currently receives events.

no setter, inherited

mountEvent ↔ SignalDispatcher<GameSystemLifecycleListener>

late, final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

state → GameState<Game>

The simulation this system belongs to - scenes, sibling systems, the pool and the tick loop.

no setter, inherited

unmountEvent ↔ SignalDispatcher<GameSystemLifecycleListener>

late, final, inherited

Methods

collectListeners(ListenerCollector collector) → void

Offers this owner's listeners to its own dispatchers.

inherited

compareTo(GameSystem other) → int

Compares this object to another object.

inherited

describeEvents(EventDescriptor descriptor) → void

Declares this owner's dispatchers. Runs once, at boot, before collectListeners.

inherited

describeInputs(InputDescriptor descriptor) → void

Declares this system's input actions - see Game.describeInputs.

inherited

describeQuery(QueryDescriptor descriptor) → void

override

disableAfterUncaught() → void

A system is the one listener the engine can switch off and carry on, so this is where the base class's no-op is overridden - see GameListener.disableAfterUncaught. Same flag disableSystem sets, so Game.enableSystem brings it back.

inherited

getGame<T extends Game>() → T

This system's game, as T.

inherited

getState<T extends GameState<Game>>() → T

This system's state, as T. See getGame - same argument, other half.

inherited

getSystem<T extends GameSystem>() → T

A sibling system declared in the same describeSystems. Reaching one directly is the escape hatch for cross-system state; note it says nothing about ordering, which is declaration order and nothing else.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onEntityDespawned(Entity entity) → void

entity is going away. Its row is still readable here and never again afterwards.

override

onEntitySpawned(Entity entity) → void

entity has been created, with its field defaults already stamped into the row. Fired from the same call site as EntityLifecycleListener.onEntityMounted, so the two cannot disagree about when a spawn happened.

override

onFixedUpdate() → void

override

singleScene<T extends SceneStruct>() → T

The one loaded scene, as T - sugar for state.singleScene<T>(), and carrying the same precondition its name states: it throws once a second scene is resident. See GameState.singleScene.

inherited

startCoroutine(Coroutine coroutine) → CoroutineFuture

Starts coroutine and returns a handle to await or stop.

inherited

startCoroutineWithParam<T>(CoroutineWithParam<T> coroutine, {required T param}) → CoroutineFuture

startCoroutine for a body that takes an argument, so the same coroutine can be started for many entities without a closure per start.

inherited

stopAllCoroutines() → void

Stops every coroutine this owner started. Others keep running.

inherited

stopCoroutine(CoroutineFuture coroutine) → void

Stops one. Idempotent.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

maxHierarchyDepth → const int

Guards against a cycle in the parent chain.