Creating Hole in 2D sprites and UI images | Stencil Testing | UI/Default Shader | Unity Game Engine

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Drag & Drop 2D | World-Space 2D Objects | C# | Unity Game Engine

DragDrop2D.cs

using UnityEngine;

public class DragDrop2D : MonoBehaviour
{
    Vector3 offset;
    Collider2D collider2d;
    public string destinationTag = "DropArea";

    void Awake()
    {
        collider2d = GetComponent<Collider2D>();
    }

    void OnMouseDown()
    {
        offset = transform.position - MouseWorldPosition();
    }

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

    void OnMouseUp()
    {
        collider2d.enabled = false;
        var rayOrigin = Camera.main.transform.position;
        var rayDirection = MouseWorldPosition() - Camera.main.transform.position;
        RaycastHit2D hitInfo;
        if (hitInfo = Physics2D.Raycast(rayOrigin, rayDirection))
        {
            if (hitInfo.transform.tag == destinationTag)
            {
                transform.position = hitInfo.transform.position + new Vector3(0, 0, -0.01f);
            }
        }
        collider2d.enabled = true;
    }

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

Launching Projectile | Drawing Trajectory | Projectile Motion | Line Renderer |C#| Unity Game Engine

ProjectileLauncher.cs

using UnityEngine;

public class ProjectileLauncher : MonoBehaviour
{
    public Transform launchPoint;
    public GameObject projectile;
    public float launchSpeed = 10f;

    [Header("****Trajectory Display****")]
    public LineRenderer lineRenderer;
    public int linePoints = 175;
    public float timeIntervalInPoints = 0.01f;

    void Update()
    {
        if(lineRenderer != null)
        {
            if(Input.GetMouseButton(1))
            {
                DrawTrajectory();
                lineRenderer.enabled = true;
            }
            else
                lineRenderer.enabled = false;
        }
        if (Input.GetMouseButtonDown(0))
        {
            var _projectile = Instantiate(projectile, launchPoint.position, launchPoint.rotation);
            _projectile.GetComponent<Rigidbody>().velocity = launchSpeed * launchPoint.up;
        }
    }

    void DrawTrajectory()
    {
        Vector3 origin = launchPoint.position;
        Vector3 startVelocity = launchSpeed * launchPoint.up;
        lineRenderer.positionCount = linePoints;
        float time = 0;
        for (int i = 0; i < linePoints; i++)
        {
            // s = u*t + 1/2*g*t*t
            var x = (startVelocity.x * time) + (Physics.gravity.x / 2 * time * time);
            var y = (startVelocity.y * time) + (Physics.gravity.y / 2 * time * time);
            Vector3 point = new Vector3(x, y, 0);
            lineRenderer.SetPosition(i, origin + point);
            time += timeIntervalInPoints;
        }
    }
}

Animation Events | Event Functions | Animator Events | C# | Unity Game Engine

AnimationEventsDemo.cs

using UnityEngine;

public class AnimationEventsDemo : MonoBehaviour
{
    //no parameter
    public void TriggerEvent()
    {
        Debug.Log("event triggered");
    }

    //float parameter
    public void ScaleDownEvent(float scale)
    {
        transform.localScale = new Vector3(scale, scale, scale);
    }

    //int parameter
    public void ScaleUpEvent(int scale)
    {
        transform.localScale = new Vector3(scale, scale, scale);
    }

    //string parameter
    public void PrintLogEvent(string str)
    {
        Debug.Log(str);
    }

    //Object parameter
    public void SpawnObjectEvent(Object gameObject)
    {
        if (gameObject != null)
            Instantiate(gameObject);
    }

    //multiple parameters(float,int,string,object)
    public void MultiParamEvent(AnimationEvent e)
    {
        Debug.Log(e.floatParameter + "," + e.intParameter + "," + e.stringParameter);
        if (e.objectReferenceParameter != null)
        {
            Instantiate(e.objectReferenceParameter);
        }
    }
}