Class TrafficSignalBehavior

Namespace: mobisim.Traffic.Timeline

The runtime PlayableBehaviour counterpart to TrafficSignalClip. Carries clip-level configuration into the playback graph and computes remaining clip duration each frame so the mixer can drive a countdown display.

public class TrafficSignalBehavior : PlayableBehaviour

Inheritance

object→PlayableBehaviour→TrafficSignalBehavior

Remarks

Unity's Timeline pipeline separates the asset (authored in the Timeline window — TrafficSignalClip) from the runtime behaviour (evaluated each frame — this class). Storing the clipAsset reference here lets the TrafficSignalMixer read clip settings (signal type, flashing, timer visibility) via the behaviour without needing a direct reference to the asset at the mixer level.

Fields

RemainingTime

The remaining duration (in seconds) of the clip in the track, evaluated at runtime.

public float RemainingTime

Field Value

float

Remarks

Data flows one way: Object) writes this value each frame based on playable.GetDuration() - playable.GetTime(), and TrafficSignalMixer reads it to drive the countdown display. Keeping the computation here (in the behaviour) rather than in the mixer ensures each clip owns its own remaining-time state, which is important when multiple signal clips overlap on the same track.

clipAsset

The clip asset that created this behavior instance.

public TrafficSignalClip clipAsset

Field Value

TrafficSignalClip

Methods

ProcessFrame(Playable, FrameData, object)

This function is called during the ProcessFrame phase of the PlayableGraph.

Updates RemainingTime each frame so the mixer can drive the countdown display.

public override void ProcessFrame(Playable playable, FrameData info, object playerData)

Parameters

Name	Type	Description
playable	Playable
info	FrameData
playerData	object

Remarks

The clipAsset.IndicateTime guard avoids the subtraction and assignment on every frame for clips that do not show a countdown timer. Without it, every traffic-signal clip — including simple red or green holds with no UI timer — would perform the calculation unnecessarily.