Creating a behavior tree

In this section, we will create a fully functional behavior tree for the agent we previously created. The steps we will follow are as follows:

• Creating the AI controller
• Creating the Blackboard
• Creating the behavior tree

Let’s start by creating a subclass of the AIController class to control our dummy puppet.

Creating the AI controller

We will be now creating a class extending AIController that will be used as a starting point for the behavior tree. To get started, open the Unreal Engine Editor and do the following steps:

1. From the main menu, select Tools | New C++ Class.
2. Click on the All Classes tab section and look for AIController.

Figure 8.6 – AI controller class creation

3. Click the Next button.
4. Name the class BaseDummyAIController and click the Create Class button.

Once the class files have been created and your IDE has been opened, look for the BaseDummyAIController...