Overview

Hytale uses a sophisticated AI system for NPCs with builders, blackboards, and behavior trees.

Package: com.hypixel.hytale.server.npc

Events

Class	Description
AllNPCsLoadedEvent	Fired when all NPCs are loaded

Animations

Class	Description
animations.NPCAnimationSlot	NPC animation slot

Builder System

Package: com.hypixel.hytale.server.npc.asset.builder

The builder system creates NPC components from configuration.

Class	Description
Builder	Base builder interface
BuilderBase	Base builder implementation
BuilderManager	Manages builders
BuilderContext	Builder context
BuilderFactory	Creates builders
BuilderComponent	Component builder
BuilderDescriptor	Describes builder
BuilderParameters	Builder parameters
Feature	Feature definition

Expressions

Class	Description
expression.BuilderExpression	Base expression
expression.BuilderExpressionDynamic	Dynamic expression
expression.BuilderExpressionDynamicBoolean	Dynamic boolean
expression.BuilderExpressionDynamicNumber	Dynamic number
expression.BuilderExpressionDynamicString	Dynamic string
expression.BuilderExpressionStaticBoolean	Static boolean
expression.BuilderExpressionStaticNumber	Static number

Holders

Class	Description
holder.AssetHolder	Asset holder
holder.BooleanHolder	Boolean holder
holder.IntHolder	Integer holder
holder.FloatHolder	Float holder
holder.DoubleHolder	Double holder
holder.EnumHolder	Enum holder

Subsystems

• Blackboard: AI state storage and sharing

• Decision Maker: AI decision logic

• Movement: NPC pathfinding and movement

• State Machine: Behavior state management

• Sensors: Environment perception