Behaviour Tree Tool

• Created a behaviour tree creation tool in Unity, for a third-year university assignment.

• An editor window allows the user to create, modify, save and load simple behaviour trees, and the behaviour trees execute behaviours at runtime.

• Creating this tool taught me a lot about creating editor tools in Unity, how behaviour trees function and making a tool that allows users to add custom content.

Editor window

• Users can create or remove nodes, and add or remove connections between nodes.

• New behaviour classes created by the user will be added to the list as new options for nodes.

• Behaviour tree assets can be saved and loaded.

Runtime execution

• Runtime objects with a reference to the behaviour tree asset will create an instance of that behaviour tree, which they can then execute at runtime.

• The above demonstration shows a number of creatures cycling through the behaviours Move, Attack, and Turn.

• All creatures have a reference to the same behaviour tree asset, but are running their own instances at runtime.