Direct Blueprint Communication

Direct Blueprint Communication is a simple method of communication between Blueprints/Actors. It is used by creating an object reference variable that stores a reference to another Actor/Blueprint. Then, we can call Actions using this object reference variable as the Target input parameter of these Actions.

As an example, let's create a Blueprint called BP_LightSwitch. The BP_LightSwitch Blueprint has an object reference variable of the Point Light type that references a Point Light placed in the Level. When the player overlaps the BP_LightSwitch Blueprint on the Level, it toggles the visibility of the Point Light.

To create the Blueprint, follow these steps:

1. Open any existing project that you created that contains starter content or create one if you want.
2. Click on the Content Drawer button to open Content Browser, then click the Add button and select Blueprint Class.
3. On the next screen, choose Actor as the parent class.
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