Class BTService

Behavior Tree service nodes is designed to perform "background" tasks that update AI's knowledge.

Inheritance

System.Object

UObject

BTNode

BTAuxiliaryNode

BTService

BTService_BlackboardBase

BTService_BlueprintBase

Inherited Members

BTNode.TreeAsset

BTNode.ParentNode

UObject.TransientPackage

UObject.CastTo<T>(UObject)

UObject.CastTo(UObject, Type)

UObject.RemoveObject(UObject)

UObject.MakeObjectArrayField<T>(NativeArray*)

UObject.NotImplemented<T>()

UObject.Construct()

UObject.GetHashCode()

UObject.GetName()

UObject.ToString()

UObject.Name

UObject._None

UObject.None

UObject.ObjPointer

UObject.LoadObjectFromClass(Class, UObject, String, String, LoadFlags, PackageMap, Boolean)

UObject.LoadClass(Class, UObject, String, String, LoadFlags, PackageMap)

UObject.GetPropertyFor<T>(Name)

UObject.ExecuteUbergraph

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

Namespace: UE4.AIModule

Assembly: UE4DotNet.dll

Syntax

public class BTService : BTAuxiliaryNode

Remarks

Services are being executed when underlying branch of behavior tree becomes active, but unlike tasks they don't return any results and can't directly affect execution flow.

Usually they perform periodical checks (see TickNode) and often store results in blackboard. If any decorator node below requires results of check beforehand, use OnSearchStart function. Keep in mind that any checks performed there have to be instantaneous!

Other typical use case is creating a marker when specific branch is being executed (see OnBecomeRelevant, OnCeaseRelevant), by setting a flag in blackboard.

Because some of them can be instanced for specific AI, following virtual functions are not marked as const:

• OnBecomeRelevant (from UBTAuxiliaryNode)
• OnCeaseRelevant (from UBTAuxiliaryNode)
• TickNode (from UBTAuxiliaryNode)
• OnSearchStart

If your node is not being instanced (default behavior), DO NOT change any properties of object within those functions! Template nodes are shared across all behavior tree components using the same tree asset and must store their runtime properties in provided NodeMemory block (allocation size determined by GetInstanceMemorySize() )

Properties

bCallTickOnSearchStart

Declaration

public bool bCallTickOnSearchStart { get; set; }

Property Value

Type	Description
System.Boolean

bRestartTimerOnEachActivation

Declaration

public bool bRestartTimerOnEachActivation { get; set; }

Property Value

Type	Description
System.Boolean

DefaultObject

Get UE4 Default Object for this Class

Declaration

public static BTService DefaultObject { get; }

Property Value

Type	Description
BTService

Interval

defines time span between subsequent ticks of the service

Declaration

public float Interval { get; set; }

Property Value

Type	Description
System.Single

RandomDeviation

adds random range to service's Interval

Declaration

public float RandomDeviation { get; set; }

Property Value

Type	Description
System.Single

StaticClass

Get UE4 Class

Declaration

public static Class StaticClass { get; }

Property Value

Type	Description
Class

Methods

New(UObject, Name)

Spawn an object of this class

Declaration

public static BTService New(UObject obj = null, Name name = default(Name))

Parameters

Type	Name	Description
UObject	obj
Name	name

Returns

Type	Description
BTService

Operators

Implicit(IntPtr to BTService)

Convert from IntPtr to UObject

Declaration

public static implicit operator BTService(IntPtr p)

Parameters

Type	Name	Description
System.IntPtr	p

Returns

Type	Description
BTService