BT BLACKBOARD LOGGING

Log any blackboard keys through service or task. Log messages only if value changes

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🖼️ Node Overview

Node Type	Menu Path	Executes
Print String (Task)	Behavior Tree → Tasks → Print String	Once, when the task starts.
Print String (Service)	Behavior Tree → Services → Print String	Every tick (default 0.1 s).

Key capabilities:

• Print any Blackboard key in screen, log, or 3D world.

• Unique messages are logged only when they change (keeps logs clean for logs viewer and output logs).

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⚙️ Configurable Fields

Property	Description
Caller Name	Optional prefix (e.g., [OnSeePlayer]).
Print BBKey	Blackboard key to display.
Text Color	Colour for on‑screen text.
Text Duration	How long on‑screen text stays visible.
Log Severity	Info, Warning, or Error.
Print to World	Enables DrawDebugString.
Text Location	Print above Actor or a custom Vector.
Interval	Interval of logging in service node

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🧠 How Logs Work

• Service node samples the key every tick; Task prints once executed.

• The system logs only when the key’s value changes.

• Destinations: project log files, LogsViewer, on‑screen, and/or in‑world.

⚠️ Values are skipped only in the logs but can still be rendered on‑screen for continuous visual feedback.

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🔄 Example Use Cases

• Visualise the TargetActor position in world space.

• Highlight state transitions such as EnemyState: Alert → Combat.

• Log once when ShouldAttack flips from false → true.

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