3. Introduction to Game Engines: Unity and Unreal Engine

Learning Objectives Explain the purpose of a physics engine and how it creates realistic movement. Describe what a particle system is and list three examples of its use (e.g., smoke, fire, magic spells). Define User Interface (UI) and identify common UI elements in a game, like health bars and score counters. Explain the concept of a Prefab (Unity) or Blueprint Class (Unreal) for reusing game objects. Design a simple game interaction that uses a trigger and a UI element (e.g., walking into a zone to show a message). Differentiate between a static object (doesn't move) and a dynamic object (affected by physics). Have you ever wondered how games make rain fall, fire crackle, or characters bounce realistically off a trampoline? ✨ Let's learn the secret tools game dev...

TermDefinitionExample Physics EngineThe part of the game engine that automatically handles rules of the real world, like gravity, bouncing, and friction. You don't have to code 'what goes up must come down'; the physics engine does it for you!When you add a 'Rigidbody' component to a ball in Unity, the physics engine takes over and makes it fall to the ground and bounce, just like a real ball. Particle SystemA tool for creating special effects made of many tiny, moving images or models. It's like a magic sprinkler that can spray fire, smoke, rain, sparkles, or explosions.To make a campfire, you would use a particle system to generate hundreds of little orange and yellow sparks that fly up and fade away. User Interface (UI)All the text, buttons, and graphics t...

The Component System GameObject + Components = Functionality In Unity and Unreal, you start with an empty GameObject. To make it do things, you add components. To make it visible, add a 'Mesh Renderer'. To make it obey physics, add a 'Rigidbody'. To make it solid, add a 'Collider'. You build objects like you're putting LEGO bricks together. Event-Driven Logic Pattern IF (Event Happens) THEN (Execute Action) Instead of constantly checking things in a loop, game engines are great at listening for specific events. Use this pattern to make your game react to things. For example, 'IF the player's collider touches the coin's collider, THEN add 10 to the score variable and destroy the coin'. The Prefab/Blueprint Workflow...