Unity and game development

This section collects Unity and C# notes with explanations that can be understood without launching an editor.

Topics to document

Game loops and the role of Update versus FixedUpdate
Working with MonoBehaviour and components
Choosing data structures for runtime systems
Separating core algorithms from Unity scene objects
Save data and persistence

Example: keep core logic independent

public static int GetHighestScore(IEnumerable<int> scores)
{
    return scores.Max();
}

Keeping algorithms independent of Unity APIs makes them easier to unit test and reuse.

Start with these guides

Unity script lifecycle: when Awake, Update, FixedUpdate and LateUpdate run, and which tasks belong in each.
Rigidbody and movement: choosing a physics-friendly way to move an object.
Collisions and triggers: signatures, prerequisites and troubleshooting for contact events.
Editor-only compilation: the difference between #if UNITY_EDITOR and editor assemblies.
Namespaces and assembly definitions: separating large codebases into understandable modules.

A sensible learning order

Read the lifecycle notes first so that FixedUpdate and input timing make sense. Then look at physics movement, followed by collision callbacks. Once the runtime behavior is clear, the C# and assembly guides help you organize larger projects without tying every gameplay class to Unity itself.

Unity attributes

Use the Unity attributes reference to find Inspector, serialization, component, Editor and Jobs/Burst attributes. It includes practical C# examples, requirements and a comparison guide to avoid mixing up similar annotations.

Unity 6.6 learning paths

Core concepts: Scenes and GameObjects → Hierarchy and Transforms → Prefabs.

Rendering: Materials → Shaders → Shader Graph → Writing URP shaders → Shader optimization.

From project to player: Build fundamentals → Build Profiles → Build from Editor → Clean and development builds → Build output → Command-line builds →.

These lessons explain not only the interface steps, but also what Unity creates, why the settings matter and which changes to test in a real player. They link to the official Unity 6.6 manual for version-specific details.