EditBehaviorTree

The EditBehaviorTree tool creates and edits Behavior Trees and Blackboards for AI characters.

Capabilities

Composite Nodes

Add structural nodes:

Selector: Tries children until one succeeds
Sequence: Runs children in order until one fails
Simple Parallel: Runs main task and background tree

Add a Selector node at the root
Add a Sequence under the Selector for combat behavior
Add a Sequence under the Selector for patrol behavior

Task Nodes

Add executable tasks:

Add MoveTo task targeting BlackboardKey TargetLocation
Add Wait task with WaitTime 2.0
Add PlayAnimation task
Add MakeNoise task
Add RotateToFaceBBEntry task

Decorators

Add conditions and modifiers:

Add Blackboard decorator checking IsPlayerVisible
Add Cooldown decorator with CooldownTime 5.0
Add Loop decorator with NumLoops 3
Add TimeLimit decorator with TimeLimit 10.0
Add ConditionalLoop decorator

Services

Add background behaviors:

Add DefaultFocus service
Add RunEQS service for environment queries

Blackboard Management

Create Keys

Add Bool key IsPlayerVisible
Add Vector key TargetLocation
Add Object key TargetActor of class Actor
Add Float key LastSeenTime
Add Enum key CurrentState

Supported Key Types

Type	Description
Bool	True/false flags
Int	Integer values
Float	Decimal numbers
String	Text data
Name	FName values
Vector	3D positions
Rotator	3D rotations
Object	UObject references
Class	UClass references
Enum	Enumeration values

Assign Blackboard

Set the Blackboard for BT_EnemyAI to BB_EnemyData

Example: Patrol and Chase AI

Create BT_GuardAI with:

Root Selector:
├── Sequence "Chase" (with Blackboard decorator on CanSeePlayer)
│   ├── MoveTo task (TargetActor key)
│   └── Wait task (0.5 seconds)
└── Sequence "Patrol"
    ├── MoveTo task (PatrolPoint key)
    ├── Wait task (3 seconds)
    └── Service: UpdatePatrolPoint

Create BB_GuardData with:
- Bool: CanSeePlayer
- Object: TargetActor (Actor class)
- Vector: PatrolPoint
- Int: CurrentPatrolIndex

Tree Structure

The tool maintains parent-child relationships:

Add Selector at root
Add Sequence under root Selector
Add MoveTo under the Sequence
Add Cooldown decorator on the Sequence

Decorators and Services attach to their parent node.

Tips

Build top-down: Start with root, add composites, then tasks
Name nodes: Use descriptive names for easier reference
Use Blackboard: Store state in Blackboard keys, not variables
Test incrementally: Build small, test, then expand

EditBehaviorTree

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