c7401864

Guide
- Agents and actions
- Authoring a behaviour tree
- Behaviour trees
- The blackboard
- The AI debugger
- Environment queries
- GOAP
- Perception
- Sensors
- Utility
- Nodes over the world
- Move sets
- Pose constraints
- The variation harness
- Getting content into a running game
- Fuzzing a format that has a grammar
- Symbols
- Component defaults
- Components
- Entity queries
- Booleans and handoff
- The editing pipeline
- Editor scripts
- Element selection
- Face materials
- Foliage mode
- The frame panel
- Icons
- The editor shell
- Inspectors in markup
- Editable meshes in a scene
- Editor modes
- Building to a number
- Scene menus
- The shape tool
- Snapping
- Sub-object picking
- Sculpt and paint mode
- Water mode
- Writing an editor plugin
- Block-out shapes
- Booting an application
- Floating things on water
- Character movement
- Editable meshes
- Growing a forest
- Foliage instances
- Grass
- Mesh booleans
- Mesh operations
- Mesh surfaces
- Networked players
- Players and possession
- Splines
- Terrain brushes
- The terrain heightfield
- Painting a terrain
- Sculpting a heightfield
- Where the water surface is
- Saving and restoring a world
- Leashing and spawn tables
- Attributes and the modifier algebra
- Chat channels, routing and moderation
- Collections, achievements and transmog
- Abilities and damage
- Definitions and the content walk
- Dynamic events and world bosses
- Currencies, vendors, trade, mail and the auction
- Effects
- Gameplay events
- Player housing
- Dungeons, raids and lockouts
- Interactables, gathering and crafting
- Inventory and the container algebra
- Items
- Authoring a loot table
- Loot tables
- Gameplay modules
- Mounts and vehicles
- Levels, talents and reputation
- Arenas, battlegrounds and objectives
- The quest and event-chain editor
- Quests, stages and objectives
- Gameplay randomness
- Requirements
- Weapons and hit claims
- Parties, guilds, friends and presence
- Gameplay tags
- Maps, discovery and travel
- Admission, health and the control plane
- Durable state and the ledger
- The gameplay bridge
- Matchmaking, queues and ratings
- Placing players
- Placing realms
- Shards, keys and specs
- The cluster
- The live verbs, at three in the morning
- The service plane
- Transfer tickets
- Transferring players
- Upgrading a fleet
- Writing a realm
- Choosing a frame
- Drawing foliage
- The ambient split, and the nodes that fill it
- Drawing grass
- Impostors
- Culling and streaming instances
- Turning on dynamic global illumination
- The look profile
- Meshes and materials, type by type
- Drawing particles
- Lighting a scene in lux and lumens
- Making a room look different
- The post-processing node kinds
- Tracing rays against the scene's own triangles
- A pass that reads the frame so far
- Render quality presets
- Making everything cast a shadow
- The Standard Frame
- Drawing a terrain
- Streaming texture mip tails
- Timing the frame on the GPU
- Fog a shadow can fall through
By kind
- Components48
- Systems55
- Controls169
- Shaders63
- Graph nodes64
- Importers28
- Annotations45
- Diagnostics8
- Log events69
All namespaces315
Releases1

BehaviorTreeContent

class

Core/Vixen.Ai/BehaviorTrees/BehaviorTreeContent.cs:134

csharp

public sealed class BehaviorTreeContent

A behaviour tree as a file: a blackboard, a root, and where the boxes are.

Read the guide page for this →

Remarks

What a .vxbt holds, what the importer compiles and what a game loads. It is a separate shape from BehaviorTreeAsset on purpose: the asset holds live BehaviorDecorator objects and is what the compiler consumes, and this holds the data those are built from. BehaviorTreeContentCompiler is the one direction between them.

The blackboard travels with the tree rather than being a second asset. Unreal makes a blackboard its own file and shares it between trees, which is genuinely useful and is a thing this can grow — but a tree whose keys live somewhere else cannot be opened, read or compiled on its own, and every diagnostic about a key becomes a diagnostic about a file the author is not looking at.

Fields and properties (6)

public const string Extension
What a behaviour tree is written as.
public const int Current
The version this build writes and reads.
public int Version
Which version wrote this file.
public string Name
What the tree is called.
public List<BehaviorKeyContent> Keys
Its blackboard's keys, in the order they were declared.
public BehaviorNodeContent? Root
The root, or for an empty tree.

Methods (1)

public BlackboardLayout BuildLayout(ICollection<BehaviorTreeDiagnostic>? diagnostics = null)
Compiles the keys into a layout.

Used by (20)

AuthorableNodeTestsVixen.Ai.Tests
BehaviorTreeContentCompilerVixen.Ai
BehaviorTreeResolverVixen.Ai
BehaviorTreeResolverReuseTestsVixen.Ai.Tests
BuildStateVixen.Ai
PatrolChaseGiveUpTestsVixen.Ai.Nodes.Tests
PerceptionNodeTestsVixen.Ai.Perception.Tests
TypeRegistrationVixen.Ai
Vixen_Ai_BehaviorTreeContentSerializerVixen.Ai
WorldNodeRegistrationTestsVixen.Ai.Nodes.Tests
BehaviorTreeDocumentVixen.Editor.AssetEditors
BehaviorTreeDocumentTestsVixen.Editor.AssetEditors.Tests
BehaviorTreeImporterVixen.Editor.Assets
BehaviorTreeLayoutVixen.Editor.Ai
BehaviorTreeModelVixen.Editor.Ai
BehaviorTreeModelTestsVixen.Editor.Ai.Tests
BehaviorTreeProjectionVixen.Editor.Ai
BehaviorTreeViewVixen.Editor.AssetEditors
LiveAgentVixen.Editor.AssetEditors.Tests
SnapshotCommandVixen.Editor.AssetEditors