Unity3D

Overview

Unity is a cross-platform game engine and development environment that uses C# as its primary scripting language. It supports 2D and 3D game development, AR/VR, simulation, and interactive media. Unity provides a visual editor, scene hierarchy, inspector, animation system, physics engine, and an asset store. Games and applications built with Unity can be deployed to Windows, macOS, Linux, iOS, Android, WebGL, PlayStation, Xbox, Nintendo Switch, and more. Unity scripts are C# classes that inherit from MonoBehaviour and use lifecycle methods (Awake, Start, Update, FixedUpdate, OnDestroy) to define behavior.

MonoBehaviour Lifecycle and Player Controller

The MonoBehaviour class provides lifecycle hooks. Use Update for frame-dependent logic and FixedUpdate for physics.

using UnityEngine;

namespace MyGame
{
    [RequireComponent(typeof(Rigidbody))]
    [RequireComponent(typeof(CapsuleCollider))]
    public class PlayerController : MonoBehaviour
    {