Control Transparency and Interactability of UI elements using Canvas Group | Unity Game Engine

Grid Layout Quick Demo | Sliding Puzzle Setup | Unity Game Engine

Align UI Elements in Horizontal or Vertical direction | Layout Group | Unity Game Engine

Create a Mini-Map using Render Texture | Unity Game Engine

Render Texture Quick Demo | TV | Unity Game Engine

Showing Progress While Loading Scene | Unity Game Engine

SceneLoader.cs

using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class SceneLoader : MonoBehaviour
{
    public GameObject LoaderUI;
    public Slider progressSlider;

    public void LoadScene(int index)
    {
        StartCoroutine(LoadScene_Coroutine(index));
    }

    public IEnumerator LoadScene_Coroutine(int index)
    {
        progressSlider.value = 0;
        LoaderUI.SetActive(true);

        AsyncOperation asyncOperation = SceneManager.LoadSceneAsync(1);
        asyncOperation.allowSceneActivation = false;
        float progress = 0;

        while (!asyncOperation.isDone)
        {
            progress = Mathf.MoveTowards(progress, asyncOperation.progress, Time.deltaTime);
            progressSlider.value = progress;
            if (progress >= 0.9f)
            {
                progressSlider.value = 1;
                asyncOperation.allowSceneActivation = true;
            }
            yield return null;
        }
    }
}

Player Movement using Character Controller(Move, Turn, Jump, Fall) | Unity Game Engine

PlayerController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(CharacterController))]
public class PlayerController : MonoBehaviour
{
    public float speed = 3;
    public float rotationSpeed = 90;
    public float gravity = -20f;
    public float jumpSpeed = 15;

    CharacterController characterController;
    Vector3 moveVelocity;
    Vector3 turnVelocity;

    void Awake()
    {
        characterController = GetComponent<CharacterController>();
    }

    void Update()
    {
        var hInput = Input.GetAxis("Horizontal");
        var vInput = Input.GetAxis("Vertical");

        if(characterController.isGrounded)
        {
            moveVelocity = transform.forward * speed * vInput;
            turnVelocity = transform.up * rotationSpeed * hInput;
            if(Input.GetButtonDown("Jump"))
            {
                moveVelocity.y = jumpSpeed;
            }
        }
        //Adding gravity
        moveVelocity.y += gravity * Time.deltaTime;
        characterController.Move(moveVelocity * Time.deltaTime);
        transform.Rotate(turnVelocity * Time.deltaTime);
    }
}

Shooting Laser using Raycast and LineRenderer | Unity Game Engine

RaycastGun.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(LineRenderer))]
public class RaycastGun : MonoBehaviour
{
    public Camera playerCamera;
    public Transform laserOrigin;
    public float gunRange = 50f;
    public float fireRate = 0.2f;
    public float laserDuration = 0.05f;

    LineRenderer laserLine;
    float fireTimer;

    void Awake()
    {
        laserLine = GetComponent<LineRenderer>();
    }

    void Update()
    {
        fireTimer += Time.deltaTime;
        if(Input.GetButtonDown("Fire1") && fireTimer > fireRate)
        {
            fireTimer = 0;
            laserLine.SetPosition(0, laserOrigin.position);
            Vector3 rayOrigin = playerCamera.ViewportToWorldPoint(new Vector3(0.5f, 0.5f, 0));
            RaycastHit hit;
            if(Physics.Raycast(rayOrigin, playerCamera.transform.forward, out hit, gunRange))
            {
                laserLine.SetPosition(1, hit.point);
                Destroy(hit.transform.gameObject);
            }
            else
            {
                laserLine.SetPosition(1, rayOrigin + (playerCamera.transform.forward * gunRange));
            }
            StartCoroutine(ShootLaser());
        }
    }

    IEnumerator ShootLaser()
    {
        laserLine.enabled = true;
        yield return new WaitForSeconds(laserDuration);
        laserLine.enabled = false;
    }
}

Launching Projectiles | 3D | Unity Game Engine

LaunchProjectile.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LaunchProjectile : MonoBehaviour
{
    public Transform launchPoint;
    public GameObject projectile;
    public float launchVelocity = 10f;

    void Update()
    {
        if(Input.GetButtonDown("Fire1"))
        {
            var _projectile = Instantiate(projectile, launchPoint.position, launchPoint.rotation);
            _projectile.GetComponent<Rigidbody>().velocity = launchPoint.up * launchVelocity;
        }
    }
}

Projectile.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Projectile : MonoBehaviour
{
    public float life = 5f;

    void Awake()
    {
        Destroy(gameObject, life);
    }
}

2D Tank Movement and Shooting | Unity Game Engine

Tank2D.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Tank2D : MonoBehaviour
{
    public Transform bulletSpawnPoint;
    public GameObject bulletPrefab;
    public float bulletSpeed = 10;
    public float moveSpeed = 2;

    void Update()
    {
        Movement();
        Shooting();
    }

    void Movement()
    {
        float h = Input.GetAxisRaw("Horizontal");
        float v = Input.GetAxisRaw("Vertical");
        if (h != 0)
        {
            transform.position += new Vector3(h * moveSpeed * Time.deltaTime, 0, 0);
            transform.rotation = Quaternion.Euler(0, 0, -90 * h);
        }
        else if (v != 0)
        {
            transform.position += new Vector3(0, v * moveSpeed * Time.deltaTime, 0);
            transform.rotation = Quaternion.Euler(0, 0, 90 - 90 * v);
        }
    }

    void Shooting()
    {
        if(Input.GetKeyDown(KeyCode.Space))
        {
            var bullet = Instantiate(bulletPrefab, bulletSpawnPoint.position, bulletSpawnPoint.rotation);
            bullet.GetComponent<Rigidbody2D>().velocity = bulletSpawnPoint.up * bulletSpeed;
        }
    }
}

Bullet.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Bullet : MonoBehaviour
{
    public float life = 3;

    void Awake()
    {
        Destroy(gameObject, life);
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        Destroy(collision.gameObject);
        Destroy(gameObject);
    }
}

Simple Shooting | 3D | Bullets | Unity Game Engine

Gun.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Gun : MonoBehaviour
{
    public Transform bulletSpawnPoint;
    public GameObject bulletPrefab;
    public float bulletSpeed = 10;

    void Update()
    {
        if(Input.GetKeyDown(KeyCode.Space))
        {
            var bullet = Instantiate(bulletPrefab, bulletSpawnPoint.position, bulletSpawnPoint.rotation);
            bullet.GetComponent<Rigidbody>().velocity = bulletSpawnPoint.forward * bulletSpeed;
        }
    }
}

Bullet.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Bullet : MonoBehaviour
{
    public float life = 3;

    void Awake()
    {
        Destroy(gameObject, life);
    }

    void OnCollisionEnter(Collision collision)
    {
        Destroy(collision.gameObject);
        Destroy(gameObject);
    }
}

Simple Shooting | 2D | Bullets | Unity Game Engine

Gun2D.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Gun2D : MonoBehaviour
{
    public Transform bulletSpawnPoint;
    public GameObject bulletPrefab;
    public float bulletSpeed = 10;

    void Update()
    {
        if(Input.GetKeyDown(KeyCode.Space))
        {
            var bullet = Instantiate(bulletPrefab, bulletSpawnPoint.position, bulletSpawnPoint.rotation);
            bullet.GetComponent<Rigidbody2D>().velocity = bulletSpawnPoint.up * bulletSpeed;
        }
    }
}

Bullet.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Bullet : MonoBehaviour
{
    public float life = 3;

    void Awake()
    {
        Destroy(gameObject, life);
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        Destroy(collision.gameObject);
        Destroy(gameObject);
    }
}

Drag & Drop | Screen-Space UI Elements | Unity Game Engine

DragDropUI.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class DragDropUI : MonoBehaviour, IPointerDownHandler, IDragHandler, IPointerUpHandler
{
    Vector3 offset;
    CanvasGroup canvasGroup;
    public string destinationTag = "DropArea";

    void Awake()
    {
        if (gameObject.GetComponent<CanvasGroup>() == null)
            gameObject.AddComponent<CanvasGroup>();
        canvasGroup = gameObject.GetComponent<CanvasGroup>();
    }

    public void OnDrag(PointerEventData eventData)
    {
        transform.position = Input.mousePosition + offset;
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        offset = transform.position - Input.mousePosition;
        canvasGroup.alpha = 0.5f;
        canvasGroup.blocksRaycasts = false;
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        RaycastResult raycastResult = eventData.pointerCurrentRaycast;
        if(raycastResult.gameObject?.tag == destinationTag)
        {
            transform.position = raycastResult.gameObject.transform.position;
        }
        canvasGroup.alpha = 1;
        canvasGroup.blocksRaycasts = true;
    }
}

Drag & Drop | World-Space 3D Objects | Unity Game Engine

DragDrop.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DragDrop : MonoBehaviour
{
    Vector3 offset;
    public string destinationTag = "DropArea";

    void OnMouseDown()
    {
        offset = transform.position - MouseWorldPosition();
        transform.GetComponent<Collider>().enabled = false;
    }

    void OnMouseDrag()
    {
        transform.position = MouseWorldPosition() + offset;
    }

    void OnMouseUp()
    {
        var rayOrigin = Camera.main.transform.position;
        var rayDirection = MouseWorldPosition() - Camera.main.transform.position;
        RaycastHit hitInfo;
        if(Physics.Raycast(rayOrigin, rayDirection, out hitInfo))
        {
            if(hitInfo.transform.tag == destinationTag)
            {
                transform.position = hitInfo.transform.position;
            }
        }
        transform.GetComponent<Collider>().enabled = true;
    }

    Vector3 MouseWorldPosition()
    {
        var mouseScreenPos = Input.mousePosition;
        mouseScreenPos.z = Camera.main.WorldToScreenPoint(transform.position).z;
        return Camera.main.ScreenToWorldPoint(mouseScreenPos);
    }
}

Adding bounciness to the game object | Unity Game Engine

Character movement via on-screen Joystick controller input | Rigidbody | Unity Game Engine

JoystickController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class JoystickController : MonoBehaviour, IPointerDownHandler, IDragHandler, IPointerUpHandler
{
    [SerializeField]
    private float maxDisplacement = 200;
    Vector2 startPos;
    Transform handle;

    public static float Horizontal = 0, Vertical = 0;

    void Start()
    {
        handle = transform.GetChild(0);
        startPos = handle.position;
    }

    void UpdateHandlePosition(Vector2 pos)
    {
        var delta = pos - startPos;
        delta = Vector2.ClampMagnitude(delta, maxDisplacement);
        handle.position = startPos + delta;
        Horizontal = delta.x / maxDisplacement;
        Vertical = delta.y / maxDisplacement;
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        UpdateHandlePosition(eventData.position);
    }

    public void OnDrag(PointerEventData eventData)
    {
        UpdateHandlePosition(eventData.position);
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        UpdateHandlePosition(startPos);
    }
}

JoystickMove.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class JoystickMove : MonoBehaviour
{
    public float speed = 5;
    Rigidbody rigidBody;

    void Awake()
    {
        rigidBody = GetComponent<Rigidbody>();
    }

    void FixedUpdate()
    {
        float inputH = JoystickController.Horizontal;
        float inputV = JoystickController.Vertical;
        rigidBody.velocity = new Vector3(inputH * speed, rigidBody.velocity.y, inputV * speed);
    }
}

Character movement via on-screen touch controller input | Rigidbody | Unity Game Engine

TouchController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class TouchController : MonoBehaviour
{
    public static float Horizontal = 0, Vertical = 0;

    void Awake()
    {
        SetupButton(transform.Find("up").gameObject, Vector2.up);
        SetupButton(transform.Find("down").gameObject, Vector2.down);
        SetupButton(transform.Find("left").gameObject, Vector2.left);
        SetupButton(transform.Find("right").gameObject, Vector2.right);
    }

    void SetupButton(GameObject buttonObject, Vector2 position)
    {
        EventTrigger eventTrigger = buttonObject.AddComponent<EventTrigger>();

        var pointerDown = new EventTrigger.Entry();
        pointerDown.eventID = EventTriggerType.PointerDown;
        pointerDown.callback.AddListener((e) => UpdateAxisValue(position));
        eventTrigger.triggers.Add(pointerDown);

        var pointerUp = new EventTrigger.Entry();
        pointerUp.eventID = EventTriggerType.PointerUp;
        pointerUp.callback.AddListener((e) => UpdateAxisValue(position, reset: true));
        eventTrigger.triggers.Add(pointerUp);
    }

    void UpdateAxisValue(Vector2 position, bool reset = false)
    {
        if (position.x == 0)
            Vertical = reset ? 0 : position.y;
        else
            Horizontal = reset ? 0 : position.x;
    }
}

TouchMove.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class TouchMove : MonoBehaviour
{
    public float speed = 5;
    Rigidbody rigidBody;

    void Awake()
    {
        rigidBody = GetComponent<Rigidbody>();
    }

    void FixedUpdate()
    {
        float inputH = TouchController.Horizontal;
        float inputV = TouchController.Vertical;
        rigidBody.velocity = new Vector3(inputH * speed, rigidBody.velocity.y, inputV * speed);
    }
}

Character movement via keyboard/controller input | Rigidbody | Unity Game Engine

Move.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class Move : MonoBehaviour
{
    public float speed = 5;
    Rigidbody rigidBody;

    void Awake()
    {
        rigidBody = GetComponent<Rigidbody>();
    }

    void FixedUpdate()
    {
        float inputH = Input.GetAxis("Horizontal");
        float inputV = Input.GetAxis("Vertical");
        rigidBody.velocity = new Vector3(inputH * speed, rigidBody.velocity.y, inputV * speed);
    }
}

Double Jump | Rigidbody | Unity Game Engine

DoubleJump.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class DoubleJump : MonoBehaviour
{
    public float jumpForce = 5;
    public float groundDistance = 0.5f;

    Rigidbody rigidBody;
    bool canDoubleJump;

    void Awake()
    {
        rigidBody = GetComponent<Rigidbody>();
    }

    bool IsGrounded()
    {
        return Physics.Raycast(transform.position, Vector3.down, groundDistance);
    }

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            if(IsGrounded())
            {
                rigidBody.velocity = Vector3.up * jumpForce;
                canDoubleJump = true;
            }
            else if(canDoubleJump)
            {
                rigidBody.velocity = Vector3.up * jumpForce;
                canDoubleJump = false;
            }
        }
    }
}

Single Jump | Rigidbody | Unity Game Engine

SingleJump.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class SingleJump : MonoBehaviour
{
    public float jumpForce = 5;
    public float groundDistance = 0.5f;

    Rigidbody rigidBody;

    void Awake()
    {
        rigidBody = GetComponent<Rigidbody>();
    }

    bool IsGrounded()
    {
        return Physics.Raycast(transform.position, Vector3.down, groundDistance);
    }

    void Update()
    {
        if(Input.GetMouseButtonDown(0) && IsGrounded())
        {
            rigidBody.velocity = Vector3.up * jumpForce;
        }
    }
}

Continuous Jump | Rigidbody | Unity Game Engine

Jump.cs

using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class Jump : MonoBehaviour
{
    public float jumpForce = 4;
    public float jumpInterval = 0.25f;

    Rigidbody rigidBody;
    float jumpTimer;

    void Awake()
    {
        rigidBody = GetComponent<Rigidbody>();
    }

    void Update()
    {
        jumpTimer += Time.deltaTime;
        if (Input.GetMouseButtonDown(0))
        {
            if (jumpTimer > jumpInterval)
            {
                jumpTimer = 0;
                rigidBody.velocity = Vector3.up * jumpForce;
            }
        }
    }
}

Creating a Circular Slider | Unity Game Engine

Display a number counting towards the target number | Unity Game Engine

Count2Target.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Text))]
public class Count2Target : MonoBehaviour
{
    public float countDuration = 1;
    Text numberText;
    float currentValue = 0, targetValue = 0;
    Coroutine _C2T;

    void Awake()
    {
        numberText = GetComponent<Text>();
    }

    void Start()
    {
        currentValue = float.Parse(numberText.text);
        targetValue = currentValue;
    }

    IEnumerator CountTo(float targetValue)
    {
        var rate = Mathf.Abs(targetValue - currentValue) / countDuration;
        while(currentValue != targetValue)
        {
            currentValue = Mathf.MoveTowards(currentValue, targetValue, rate * Time.deltaTime);
            numberText.text = ((int)currentValue).ToString();
            yield return null;
        }
    }

    public void AddValue(float value)
    {
        targetValue += value;
        if (_C2T != null)
            StopCoroutine(_C2T);
        _C2T = StartCoroutine(CountTo(targetValue));
    }

    public void SetTarget(float target)
    {
        targetValue = target;
        if (_C2T != null)
            StopCoroutine(_C2T);
        _C2T = StartCoroutine(CountTo(targetValue));
    }
}

Get/Post REST API Data using HttpClient | Unity Game Engine

GetMethod.cs

using UnityEngine;
using UnityEngine.UI;
using System.Net.Http;

public class GetMethod : MonoBehaviour
{
    InputField outputArea;

    void Start()
    {
        outputArea = GameObject.Find("OutputArea").GetComponent<InputField>();
        GameObject.Find("GetButton").GetComponent<Button>().onClick.AddListener(GetData);
    }

    async void GetData()
    {
        outputArea.text = "Loading...";
        string url = "https://my-json-server.typicode.com/typicode/demo/posts";
        using(var httpClient = new HttpClient())
        {
            var response = await httpClient.GetAsync(url);
            if (response.IsSuccessStatusCode)
                outputArea.text = await response.Content.ReadAsStringAsync();
            else
                outputArea.text = response.ReasonPhrase;
        }
    }
}

PostMethod.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System.Net.Http;

public class PostMethod : MonoBehaviour
{
    InputField outputArea;

    void Start()
    {
        outputArea = GameObject.Find("OutputArea").GetComponent<InputField>();
        GameObject.Find("PostButton").GetComponent<Button>().onClick.AddListener(PostData);
    }

    async void PostData()
    {
        outputArea.text = "Loading...";
        string url = "https://my-json-server.typicode.com/typicode/demo/posts";
        var postData = new Dictionary<string, string>();
        postData["title"] = "test data";
        using(var httpClient = new HttpClient())
        {
            var response = await httpClient.PostAsync(url, new FormUrlEncodedContent(postData));
            if (response.IsSuccessStatusCode)
                outputArea.text = await response.Content.ReadAsStringAsync();
            else
                outputArea.text = response.ReasonPhrase;
        }
    }
}

Pointer Click on 2D/3D Objects without Script | Event System | Event Trigger | Unity Game Engine

Creating Image Blink effect by Changing Color | UI | Color Lerp | Unity Game Engine

ImageBlinkEffect.cs

using UnityEngine;
using UnityEngine.UI;

public class ImageBlinkEffect : MonoBehaviour
{
    public Color startColor = Color.green;
    public Color endColor = Color.black;
    [Range(0,10)]
    public float speed = 1;

    Image imgComp;

    void Awake()
    {
        imgComp = GetComponent<Image>();
    }

    void Update()
    {
        imgComp.color = Color.Lerp(startColor, endColor, Mathf.PingPong(Time.time * speed, 1));
    }
}

Creating Object Blink effect by Changing Color| 2D/3D Object | Color Lerp | Unity Game Engine

BlinkEffect.cs

using UnityEngine;

public class BlinkEffect : MonoBehaviour
{
    public Color startColor = Color.green;
    public Color endColor = Color.black;
    [Range(0,10)]
    public float speed = 1;

    Renderer ren;

    void Awake()
    {
        ren = GetComponent<Renderer>();
    }

    void Update()
    {
        ren.material.color = Color.Lerp(startColor, endColor, Mathf.PingPong(Time.time * speed, 1));
    }
}

Getting a Random Value from a List of Weighted Values | Unity Game Engine

WeightedValue.cs

using System;

[Serializable]
public class WeightedValue
{
    public string value;
    public int weight;
}

PrintRandomValue.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PrintRandomValue : MonoBehaviour
{
    public List<WeightedValue> weightedValues;

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            string randomValue = GetRandomValue(weightedValues);
            Debug.Log(randomValue ?? "No entries found");
        }
    }

    string GetRandomValue(List<WeightedValue> weightedValueList)
    {
        string output = null;

        //Getting a random weight value
        var totalWeight = 0;
        foreach (var entry in weightedValueList)
        {
            totalWeight += entry.weight;
        }
        var rndWeightValue = Random.Range(1, totalWeight + 1);

        //Checking where random weight value falls
        var processedWeight = 0;
        foreach (var entry in weightedValueList)
        {
            processedWeight += entry.weight;
            if(rndWeightValue <= processedWeight)
            {
                output = entry.value;
                break;
            }
        }

        return output;
    }
}

Binding Slider's Value to a Text Component | Using onValueChanged event | Unity Game Engine

SliderValueText.cs

using UnityEngine;
using UnityEngine.UI;

public class SliderValueText : MonoBehaviour
{
    private Slider slider;
    private Text textComp;

    void Awake()
    {
        slider = GetComponentInParent<Slider>();
        textComp = GetComponent<Text>();
    }

    void Start()
    {
        UpdateText(slider.value);
        slider.onValueChanged.AddListener(UpdateText);
    }

    void UpdateText(float val)
    {
        //textComp.text = slider.value.ToString();
        textComp.text = val.ToString();
    }
}

Changing Dropdown options at Runtime | Unity Game Engine

DropdownOperations.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class DropdownOperations : MonoBehaviour
{
    private Dropdown dropdown;

    void Awake()
    {
        dropdown = GetComponent<Dropdown>();
    }

    public void LoadFruitOptions()
    {
        dropdown.ClearOptions();
        var option1 = new Dropdown.OptionData("Apple");
        dropdown.options.Add(option1);
        var option2 = new Dropdown.OptionData("Mango");
        dropdown.options.Add(option2);
        dropdown.RefreshShownValue();
    }
    
    public void LoadDrinkOptions()
    {
        dropdown.ClearOptions();
        var option1 = new Dropdown.OptionData("Tea");
        dropdown.options.Add(option1);
        var option2 = new Dropdown.OptionData("Coffee");
        dropdown.options.Add(option2);
        dropdown.RefreshShownValue();
    }
}

Feed REST API Data to Unity UI Components | HttpClient | Unity Game Engine

WeaponsData.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

[Serializable]
public class WeaponsData
{
    public List<Weapon> Weapons;
}

[Serializable]
public class Stats
{
    public int Attack;
    public int Defence;
    public int Speed;
}

[Serializable]
public class Weapon
{
    public string Name;
    public Stats Stats;
}

GetWeaponsData.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System.Net.Http;

public class GetWeaponsData : MonoBehaviour
{
    public Dropdown NamesDropDown;
    public Slider AttackSlider;
    public Slider DefenceSlider;
    public Slider SpeedSlider;

    WeaponsData weaponsData = null;

    async void Awake()
    {
        string url = "https://hostspace.github.io/mockapi/weapons.json";
        using(var httpClient = new HttpClient())
        {
            var response = await httpClient.GetAsync(url);
            if (response.IsSuccessStatusCode)
            {
                string json = await response.Content.ReadAsStringAsync();
                weaponsData = JsonUtility.FromJson<WeaponsData>(json);
            }
            else
                Debug.LogError(response.ReasonPhrase);
        }

        if(weaponsData != null && weaponsData.Weapons.Count > 0)
        {
            NamesDropDown.options.Clear();
            foreach (var weapon in weaponsData.Weapons)
            {
                NamesDropDown.options.Add(new Dropdown.OptionData(weapon.Name));
            }
            NamesDropDown.value = 0;
            NamesDropDown.onValueChanged.AddListener(WeaponSelectEvent);
            WeaponSelectEvent(0);
        }
    }

    void WeaponSelectEvent(int index)
    {
        var stats = weaponsData.Weapons[index].Stats;
        AttackSlider.value = stats.Attack;
        DefenceSlider.value = stats.Defence;
        SpeedSlider.value = stats.Speed;
    }
}

Feed REST API Data to Unity UI Components | UnityWebRequest | Unity Game Engine

WeaponsData.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

[Serializable]
public class WeaponsData
{
    public List<Weapon> Weapons;
}

[Serializable]
public class Stats
{
    public int Attack;
    public int Defence;
    public int Speed;
}

[Serializable]
public class Weapon
{
    public string Name;
    public Stats Stats;
}

GetWeaponsData.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;

public class GetWeaponsData : MonoBehaviour
{
    public Dropdown NamesDropDown;
    public Slider AttackSlider;
    public Slider DefenceSlider;
    public Slider SpeedSlider;

    WeaponsData weaponsData = null;

    void Awake()
    {
        StartCoroutine(GetData());
    }

    IEnumerator GetData()
    {
        string url = "https://hostspace.github.io/mockapi/weapons.json";
        using(var request = UnityWebRequest.Get(url))
        {
            yield return request.SendWebRequest();
            if (request.isHttpError || request.isNetworkError)
                Debug.LogError(request.error);
            else
            {
                string json = request.downloadHandler.text;
                weaponsData = JsonUtility.FromJson<WeaponsData>(json);
            }
        }

        if(weaponsData != null && weaponsData.Weapons.Count>0)
        {
            NamesDropDown.options.Clear();
            foreach (var weapon in weaponsData.Weapons)
            {
                NamesDropDown.options.Add(new Dropdown.OptionData(weapon.Name));
            }
            NamesDropDown.value = 0;
            NamesDropDown.onValueChanged.AddListener(WeaponSelectEvent);
            WeaponSelectEvent(0);
        }
    }

    void WeaponSelectEvent(int index)
    {
        var stats = weaponsData.Weapons[index].Stats;
        AttackSlider.value = stats.Attack;
        DefenceSlider.value = stats.Defence;
        SpeedSlider.value = stats.Speed;
    }
}

Spawning Object at Mouse Position in Unity Game Engine

Spawner.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Spawner : MonoBehaviour
{
    public GameObject Cube;

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            Vector3 mousePos = Input.mousePosition;
            mousePos.z = 10;
            Vector3 worldPosition = Camera.main.ScreenToWorldPoint(mousePos);
            Instantiate(Cube, worldPosition, Quaternion.identity);
        }
    }
}

Spawning Objects in Unity Game Engine

Spawner.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Spawner : MonoBehaviour
{
    public GameObject Sphere;

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            Instantiate(Sphere, transform.position, transform.rotation);
        }
    }
}

Prefab Creation in Unity Game Engine

Scriptable Objects Quick Demo in Unity Game Engine

PlayerData.cs

using UnityEngine;

[CreateAssetMenu(menuName ="Player Data", fileName ="New Player Data")]
public class PlayerData : ScriptableObject
{
    public string playerName;
    public string playerClass;
    public Color playerColor;
}

PlayerDisplay.cs

using UnityEngine;

public class PlayerDisplay : MonoBehaviour
{
    public PlayerData playerData;

    void Start()
    {
        transform.GetChild(0).GetComponent<TextMesh>().text = $"Name : {playerData.playerName}";
        transform.GetChild(1).GetComponent<TextMesh>().text = $"Class : {playerData.playerClass}";
        gameObject.GetComponent<Renderer>().material.color = playerData.playerColor;
    }
}

Getting Unique Random Elements from a List in Unity Game Engine

PrintUniqueRandomElements.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PrintUniqueRandomElements : MonoBehaviour
{
    List<int> list = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

    List<T> GetUniqueRandomElements<T>(List<T> inputList, int count)
    {
        List<T> inputListClone = new List<T>(inputList);
        Shuffle(inputListClone);
        return inputListClone.GetRange(0, count);
    }

    void Shuffle<T>(List<T> inputList)
    {
        for (int i = 0; i < inputList.Count - 1; i++)
        {
            T temp = inputList[i];
            int rand = Random.Range(i, inputList.Count);
            inputList[i] = inputList[rand];
            inputList[rand] = temp;
        }
    }

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            var uniqueRandomList = GetUniqueRandomElements(list, 4);

            Debug.Log("All elements => " + string.Join(", ", list));
            Debug.Log("Unique random elements => " + string.Join(", ", uniqueRandomList));
            Debug.Log("*************************************************************");
        }
    }
}

Shuffling Elements of a List in Unity Game Engine

PrintShuffledList.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PrintShuffledList : MonoBehaviour
{
    List<int> list = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

    void Shuffle<T>(List<T> inputList)
    {
        for (int i = 0; i < inputList.Count - 1; i++)
        {
            T temp = inputList[i];
            int rand = Random.Range(i, inputList.Count);
            inputList[i] = inputList[rand];
            inputList[rand] = temp;
        }
    }

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            Debug.Log("Before Shuffle => " + string.Join(", ", list));
            Shuffle(list);
            Debug.Log("After Shuffle => " + string.Join(", ", list));
            Debug.Log("*****************************************");
        }
    }
}

Getting Random Elements from a List in Unity Game Engine

PrintRandomElements.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PrintRandomElements : MonoBehaviour
{
    List<int> list = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

    List<T> GetRandomElements<T>(List<T> inputList, int count)
    {
        List<T> outputList = new List<T>();
        for (int i = 0; i < count; i++)
        {
            int index = Random.Range(0, inputList.Count);
            outputList.Add(inputList[index]);
        }
        return outputList;
    }

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            var randomList = GetRandomElements(list, 4);

            Debug.Log("All elements =>  " + string.Join(", ", list));
            Debug.Log("Random elements => " + string.Join(", ", randomList));
            Debug.Log("*****************************");
        }
    }
}

Collider Trigger Event Methods(Enter, Exit, Stay) in Unity Game Engine

TriggerEvents.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TriggerEvents : MonoBehaviour
{
    void OnTriggerEnter(Collider other)
    {
        if(other.gameObject.name == "Cylinder")
        {
            Debug.Log("Enter");
            gameObject.GetComponent<Renderer>().material.SetColor("_Color", Color.red);
            other.gameObject.GetComponent<Renderer>().material.SetColor("_Color", Color.blue);
        }
    }

    void OnTriggerExit(Collider other)
    {
        if(other.gameObject.name == "Cylinder")
        {
            Debug.Log("Exit");
            gameObject.GetComponent<Renderer>().material.SetColor("_Color", Color.green);
            other.gameObject.GetComponent<Renderer>().material.SetColor("_Color", Color.white);
        }
    }

    void OnTriggerStay(Collider other)
    {
        if(other.gameObject.name == "Cylinder")
        {
            Debug.Log("Stay");
            transform.localScale += Vector3.one * Time.deltaTime;
        }
    }
}

Collision Event Methods(Enter, Exit, Stay) in Unity Game Engine

CollisionEvents.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CollisionEvents : MonoBehaviour
{
    void OnCollisionEnter(Collision collision)
    {
        if(collision.gameObject.name == "Cube")
        {
            Debug.Log("Enter");
            gameObject.GetComponent<Renderer>().material.SetColor("_Color", Color.red);
        }
    }

    void OnCollisionExit(Collision collision)
    {
        if(collision.gameObject.name == "Cube")
        {
            Debug.Log("Exit");
            gameObject.GetComponent<Renderer>().material.SetColor("_Color", Color.green);
        }
    }

    void OnCollisionStay(Collision collision)
    {
        if(collision.gameObject.name == "Cube")
        {
            Debug.Log("Stay");
            collision.transform.localEulerAngles += new Vector3(0, 0, -10) * Time.deltaTime;
        }
    }
}

Event Functions Invoke Order in Unity Game Engine

InvokeOrder.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Reflection;

public class InvokeOrder : MonoBehaviour
{
    void Start()
    {
        Debug.Log("Start()");
    }

    void Awake()
    {
        Debug.Log("Awake()");
    }

    void OnEnable()
    {
        Debug.Log("OnEnable()");
    }

    void OnDisable()
    {
        Debug.Log("OnDisable()");
    }

    void OnGUI()
    {
        Debug.Log("OnGUI()");
    }

    void Update()
    {
        Debug.Log("Update()");
    }

    void FixedUpdate()
    {
        Debug.Log("FixedUpdate()");
    }

    void LateUpdate()
    {
        Debug.Log("LateUpdate()");
    }

    void OnApplicationQuit()
    {
        Debug.Log("OnApplicationQuit()");
    }

    void OnDestroy()
    {
        Debug.Log("OnDestroy()");
    }
}

Spin Object in Unity Game Engine

Spin.cs

using UnityEngine;

public class Spin : MonoBehaviour
{
    public Vector3 speed = new Vector3(0, 0, 90);
    void Update()
    {
        transform.Rotate(speed * Time.deltaTime, Space.World);
    }
}

Spin Object Using Animator in Unity Game Engine

Using 'UI Mask' component in Unity Game Engine

Using 'Sprite Mask' to Show/Hide a Specific Area of a Sprite

Get/Post REST API Data using UnityWebRequest

GetMethod.cs

using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;

public class GetMethod : MonoBehaviour
{
    InputField outputArea;

    void Start()
    {
        outputArea = GameObject.Find("OutputArea").GetComponent<InputField>();
        GameObject.Find("GetButton").GetComponent<Button>().onClick.AddListener(GetData);
    }

    void GetData() => StartCoroutine(GetData_Coroutine());

    IEnumerator GetData_Coroutine()
    {
        outputArea.text = "Loading...";
        string uri = "https://my-json-server.typicode.com/typicode/demo/posts";
        using(UnityWebRequest request = UnityWebRequest.Get(uri))
        {
            yield return request.SendWebRequest();
            if (request.isNetworkError || request.isHttpError)
                outputArea.text = request.error;
            else
                outputArea.text = request.downloadHandler.text;
        }
    }
}

PostMethod.cs

using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;

public class PostMethod : MonoBehaviour
{
    InputField outputArea;

    void Start()
    {
        outputArea = GameObject.Find("OutputArea").GetComponent<InputField>();
        GameObject.Find("PostButton").GetComponent<Button>().onClick.AddListener(PostData);
    }

    void PostData() => StartCoroutine(PostData_Coroutine());

    IEnumerator PostData_Coroutine()
    {
        outputArea.text = "Loading...";
        string uri = "https://my-json-server.typicode.com/typicode/demo/posts";
        WWWForm form = new WWWForm();
        form.AddField("title", "test data");
        using(UnityWebRequest request = UnityWebRequest.Post(uri, form))
        {
            yield return request.SendWebRequest();
            if (request.isNetworkError || request.isHttpError)
                outputArea.text = request.error;
            else
                outputArea.text = request.downloadHandler.text;
        }
    }
}

Create Radio Buttons Behavior Using Toggle Component

RadioButtonSystem.cs

using UnityEngine;
using UnityEngine.UI;
using System.Linq;

public class RadioButtonSystem : MonoBehaviour
{
    ToggleGroup toggleGroup;

    void Start()
    {
        toggleGroup = GetComponent<ToggleGroup>();
    }

    public void Submit()
    {
        Toggle toggle = toggleGroup.ActiveToggles().FirstOrDefault();
        Debug.Log(toggle.name + " _ " + toggle.GetComponentInChildren<Text>().text);
    }
}

Save/Load Data using Json File(Json Serialization/Deserialization)

WeaponData.cs

//Object of this class will hold the data
//And then this object will be converted to JSON
[System.Serializable]
public class WeaponData
{
    public string Id;
    public string Name;
    public string Information;
}

JsonReadWriteSystem.cs

using System.IO;
using UnityEngine;
using UnityEngine.UI;

public class JsonReadWriteSystem : MonoBehaviour
{
    public InputField idInputField;
    public InputField nameInputField;
    public InputField infoInputField;

    public void SaveToJson()
    {
        WeaponData data = new WeaponData();
        data.Id = idInputField.text;
        data.Name = nameInputField.text;
        data.Information = infoInputField.text;

        string json = JsonUtility.ToJson(data, true);
        File.WriteAllText(Application.dataPath + "/WeaponDataFile.json", json);
    }

    public void LoadFromJson()
    {
        string json = File.ReadAllText(Application.dataPath + "/WeaponDataFile.json");
        WeaponData data = JsonUtility.FromJson<WeaponData>(json);

        idInputField.text = data.Id;
        nameInputField.text = data.Name;
        infoInputField.text = data.Information;
    }
}

Copy and Paste Text Using Clipboard

CopyPasteSystem.cs

using UnityEngine;
using UnityEngine.UI;

public class CopyPasteSystem : MonoBehaviour
{
    public InputField inputField;

    public void CopyToClipboard()
    {
        TextEditor textEditor = new TextEditor();
        textEditor.text = inputField.text;
        textEditor.SelectAll();
        textEditor.Copy();  //Copy string from textEditor.text to Clipboard
    }

    public void PasteFromClipboard()
    {
        TextEditor textEditor = new TextEditor();
        textEditor.multiline = true;
        textEditor.Paste();  //Copy string from Clipboard to textEditor.text
        inputField.text = textEditor.text;
    }
}

Save & Load Data Securely Using BinaryFormatter

PlayerData.cs

//Container to hold data
[System.Serializable]
public class PlayerData
{
    public string playerName;
    public float playerAge;
    public int playerClass;
}

SaveLoadSystem.cs

using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using UnityEngine;
using UnityEngine.UI;

public class SaveLoadSystem : MonoBehaviour
{
    public InputField nameInputField;
    public Slider ageSlider;
    public Dropdown classDropdown;

    //Path where data file will be stored
    string filePath;

    void Awake()
    {
        filePath = Path.Combine(Application.dataPath, "playerData.dat");
    }

    public void SavePlayerData()
    {
        PlayerData playerData = new PlayerData();
        playerData.playerName = nameInputField.text;
        playerData.playerAge = ageSlider.value;
        playerData.playerClass = classDropdown.value;

        Stream stream = new FileStream(filePath, FileMode.Create);
        BinaryFormatter binaryFormatter = new BinaryFormatter();
        binaryFormatter.Serialize(stream, playerData);
        stream.Close();
    }

    public void LoadPlayerData()
    {
        if(File.Exists(filePath))
        {
            Stream stream = new FileStream(filePath, FileMode.Open);
            BinaryFormatter binaryFormatter = new BinaryFormatter();
            PlayerData data = (PlayerData)binaryFormatter.Deserialize(stream);
            stream.Close();

            nameInputField.text = data.playerName;
            ageSlider.value = data.playerAge;
            classDropdown.value = data.playerClass;
        }
    }
}