Blueprint Communication using interfaces

A Blueprint Interface is a special type of Blueprint that only contains function names and parameters. It is used to allow communication between different types of Blueprints.

To create a Blueprint Interface, follow these steps:

1. Click the Add button in the content browser, and in the Blueprints submenu, select Blueprint Interface:

Figure 16.23 – Creating a Blueprint Interface

2. The VR template has a Blueprint Interface named VRInteraction BPI in the Content > VRTemplate > Blueprints folder. Double-click it to open the Blueprint Interface Editor. The following screenshot shows the functions of the VRInteraction BPI interface:

Figure 16.24 – The VRInteractionBPI interface functions

3. Open the Pistol Blueprint to see an example of an interface implementation. Click the Class Settings button of the Blueprint Editor. In the Details panel, go to the Interfaces...