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Pro Quickstart Guide

Get started using Pro specific features. Please see the general Getting Started Guide if this is your first time using Logic Driver.


Create a Node Class

Nodes can be extended through blueprints or C++ to allow reusable logic and node customization.

  1. Right click on your content browser, select State Machines, then Node Class.
  2. You can choose between the base classes you want to inherit from including your own classes you've created. SelectNodeClass


Describe the Node

In your new node class give your node a name and category. This allows it to be considered a new node type in the state machine graph.


Display Variables on the Node

Any variable type can be displayed directly on the node. This allows either default values to be set or variables to be passed in and evaluated.

  • Mark a variable public so it will be visible on the node.
  • Make sure to Compile your class blueprint and state machine blueprint for the variable to display on the node.
  • C++ variables need to be marked BlueprintReadWrite.
  • Setting meta = (HideOnNode) will always keep a variable from displaying on the node.


Assign Behavior to the Node

Rules can be assigned to each class to define which connections are allowed and where nodes can be placed.

This can be used to restrict when nodes show up in a context menu. For example, Dialogue Choice nodes can be configured to only be placed from a Dialogue Node. Custom transition classes can be automatically placed as well depending on which states are being connected.



Select the Node Class

In a state machine blueprint you can select the class you defined to be instanced in the graph.

The node will show up in your context menu just like normal nodes. By default it will be the title of the node class unless a different name was given in the description.


In the state machine graph when you select a state type or a transition you can choose the class in the details panel.


Once placed you will be able to drag & drop variables onto exposed node properties and edit values in the details panel. The details panel will have all of the normal node properties plus any variables you've added to your node.