Unreal Engine Technical Notes

Three main ways Blueprints communicate between Actors. Understanding coupling strength and flexibility differences for situational usage.

Differences between ActorComponent and SceneComponent, reusable health system implementation example, and Component communication patterns using Event Dispatcher and Interface.

Common Blueprint development mistakes including overusing Tick events, Cast node abuse, and frequent Get All Actors Of Class calls, with solutions for each.

Guidelines for deciding whether to create Blueprint variables as Class Variables or Local Variables. Understanding scope differences and proper usage to prevent bugs.

Heavy use of Casting increases hard references, impacting memory and load times. Design patterns using Blueprint Interface to reduce dependencies.

Both Level Blueprint and Blueprint Class can contain logic, but they differ greatly in reusability and management. Organize their characteristics and selection criteria.

Event Dispatcher enables loose coupling design by separating event sources from handlers. From Bind/Unbind basics to C++ Delegate implementation with practical examples.

Event Tick executes every frame, impacting performance when overused. Alternative designs using Timer, Event Dispatcher, and Collision Events.

For complex logic that Print String can't handle, Blueprint Debugger is effective. Learn how to set breakpoints, step through execution, and watch variables.

Functions and Macros seem similar but have different operating principles. Key differences affecting your choice: Delay node availability, execution pin branching, and more.

Blueprints become hard to read as they grow complex. Techniques for keeping graphs organized and readable: functions, macros, Reroute nodes, comment boxes, and naming conventions.