Unity Game Engine

Every lesson in the Unity Game Engine slide course, in full text: 8 decks, 488 slides.

• Lesson 1 - GameObjects and the Component ModelWhat a GameObject actually is (a named container with a Transform), why every capability - drawing, falling, colliding, running your code - is a component you attach, and the difference between switching an object off and destroying it.
• Lesson 2 - Prefabs, Instances and OverridesWhy a prefab is an asset and not a scene, how one edit reaches fifty copies, and what an override really does - the per-property switch that makes one instance stop listening to its prefab for good.
• Lesson 3 - Rigidbody, Forces and FixedUpdateWhat it means to hand an object to the physics solver: the Rigidbody, the four ForceModes and the numbers they produce, why physics runs on its own clock, and why writing transform.position sends objects through walls.
• Lesson 4 - MonoBehaviour Lifecycle (Awake, Start, Update)Which of your methods Unity calls and in what order: why every Awake finishes before any Start, what belongs in each callback, and how the order explains most null-reference bugs a beginner hits.
• Lesson 5 - GetComponent, Instantiate and DestroyThe three calls you will type more than any others: which one finds a component, which one creates an object, which one removes it - and why Destroy does not take effect until the end of the frame.
• Lesson 6 - Transform: Position, Rotation and ScaleThe component every GameObject has: what the Inspector's numbers actually mean, why local and world values differ the moment something is parented, how rotation is really stored, and what an object's own forward direction is.
• Lesson 7 - Vector3 Math and Direction VectorsDestination minus start, normalized: how to compute a direction, why the subtraction order decides between chasing and fleeing, what normalizing does and does not change, and how the dot product answers 'is it in front of me'.
• Lesson 8 - Colliders, Triggers and Collision CallbacksWhich pairs of objects actually report contact and which stay silent: the Rigidbody rule, the trigger switch, the difference between OnCollisionEnter and OnTriggerEnter, and why CompareTag beats comparing tag strings.