BehaviorTreeForGroups

Behavior Tree For Groups is an addon for Godot Engine that enables you to create swarms, flocks and multiagent systems using a single behavior tree.

You can easily design collective behaviors without any code by adding groups to your nodes.

Several examples, in 2D or 3D, are available: test them to understand how they work and what can be done

Simple 2D tutorial

First, create a new 2D scene

• save it as main

Second, create a new Agent2D

• Click the + button in your scene tree and Select NewAgent2D (you can also create your own RigidBody2D)
• Open the Agent2D.tscn automatically generated, and select the RigidBody at the root of this scene
• In the inspector, go to the Node Tab then go to Group and add a new group called test group
• Save the Agent2D scene
• Go back to your main scene

Third, create a simple behavior tree

• Click the plus button in your main scene, then select the node BehavTreeForGroups
• Then, add a new child node called Behavior
• In the inspector of the newly created node Behavior, in the Group property, write test_group. That means all the nodes having the Group test_group will be treated.
• Then, as child of the node Behavior, add a new node called TranslateRandom

Finally, put about 10 Agent2D in your main scene

• Drag & drop the file Agent2D inside your main scene
• Execute your program: all the agents having the group test_group will move at random

Many other nodes exists to create many different behaviors

Simple 3D tutorial

Very simple : replace 2D by 3D in the previous example!

• And do not forget to put a camera and a light then execute your program