Learn UNITY with Real Code Examples

// C# script: TodoItem.cs
using UnityEngine;

public class TodoItem : MonoBehaviour {
    public string taskName;
    void OnMouseDown() {
        Debug.Log("Task completed: " + taskName);
    }
}

// Usage: Attach TodoItem.cs to game objects representing tasks in the Unity scene.

Demonstrates a simple Unity scene simulating a Todo game concept, where users can interact with objects representing tasks in a 2D environment.

// C# script: ClickCounter.cs
using UnityEngine;

public class ClickCounter : MonoBehaviour {
    private int clicks = 0;

    void OnMouseDown() {
        clicks++;
        Debug.Log("Clicked " + clicks + " times.");
    }
}

Demonstrates counting clicks on game objects using Unity’s OnMouseDown event.

// C# script: PlayerMovement.cs
using UnityEngine;

public class PlayerMovement : MonoBehaviour {
    public float speed = 5f;

    void Update() {
        float moveX = Input.GetAxis("Horizontal") * speed * Time.deltaTime;
        float moveY = Input.GetAxis("Vertical") * speed * Time.deltaTime;
        transform.Translate(moveX, moveY, 0);
    }
}

Implements simple player movement using arrow keys in a Unity 2D scene.

// C# script: ObjectSpawner.cs
using UnityEngine;

public class ObjectSpawner : MonoBehaviour {
    public GameObject prefab;

    void Update() {
        if(Input.GetMouseButtonDown(0)) {
        Vector3 pos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        pos.z = 0;
        Instantiate(prefab, pos, Quaternion.identity);
        }
    }
}

Spawns prefab objects dynamically when the user clicks in the scene.

// C# script: Collectible.cs
using UnityEngine;

public class Collectible : MonoBehaviour {
    void OnTriggerEnter2D(Collider2D col) {
        if(col.CompareTag("Player")) {
        ScoreManager.instance.AddScore(1);
        Destroy(gameObject);
        }
    }
}

// C# script: ScoreManager.cs
using UnityEngine;

public class ScoreManager : MonoBehaviour {
    public static ScoreManager instance;
    int score = 0;

    void Awake() { instance = this; }
    public void AddScore(int amount) {
        score += amount;
        Debug.Log("Score: " + score);
    }
}

Implements a collectible system where the player collects coins and updates the score.

// C# script: Timer.cs
using UnityEngine;

public class Timer : MonoBehaviour {
    public float timeLeft = 10f;

    void Update() {
        timeLeft -= Time.deltaTime;
        if(timeLeft <= 0) {
        Debug.Log("Time's up!");
        enabled = false;
        }
    }
}

Shows a countdown timer and logs when time runs out.

// C# script: FollowCamera.cs
using UnityEngine;

public class FollowCamera : MonoBehaviour {
    public Transform target;
    public float smoothSpeed = 0.125f;
    public Vector3 offset;

    void LateUpdate() {
        if(target == null) return;
        Vector3 desired = target.position + offset;
        transform.position = Vector3.Lerp(transform.position, desired, smoothSpeed);
    }
}

A camera script that smoothly follows the player in a 2D game.

// C# script: JumpController.cs
using UnityEngine;

public class JumpController : MonoBehaviour {
    public float jumpForce = 5f;
    private Rigidbody2D rb;

    void Start() {
        rb = GetComponent<Rigidbody2D>();
    }

    void Update() {
        if(Input.GetKeyDown(KeyCode.Space)) {
        rb.AddForce(Vector2.up * jumpForce, ForceMode2D.Impulse);
        }
    }
}

Implements simple jump physics for a 2D player using Rigidbody2D.

// C# script: EnemyAI.cs
using UnityEngine;

public class EnemyAI : MonoBehaviour {
    public Transform player;
    public float speed = 2f;
    public float detectionRange = 5f;

    void Update() {
        float dist = Vector2.Distance(transform.position, player.position);
        if(dist < detectionRange) {
        transform.position = Vector2.MoveTowards(transform.position, player.position, speed * Time.deltaTime);
        }
    }
}

Demonstrates a simple AI that follows the player when within a certain distance.

// C# script: SceneSwitcher.cs
using UnityEngine;
using UnityEngine.SceneManagement;

public class SceneSwitcher : MonoBehaviour {
    public string sceneName;

    void Update() {
        if(Input.GetKeyDown(KeyCode.Return)) {
        SceneManager.LoadScene(sceneName);
        }
    }
}

Switches between scenes using UnityEngine.SceneManagement.