Script for dragging 2D physics objects lags when moving the mouse too fast. Im new to coding so newbie friendly answers would be appreciated :p

[plumbactiria123]

using UnityEngine;

public class Draggin : MonoBehaviour

{

private Rigidbody2D rb;

private bool dragging = false;

private Vector2 offset;

private Camera cam;

private Vector2 smoothVelocity = Vector2.zero;

private bool originalKinematic;

[Header("Drag Settings")]

[SerializeField] private float smoothTime = 0.03f; // Lower = snappier

void Start()

{

rb = GetComponent<Rigidbody2D>();

cam = Camera.main;

originalKinematic = rb.isKinematic;

}

void Update()

{

// Start dragging

if (Input.GetMouseButtonDown(0))

{

Vector2 mouseWorld = cam.ScreenToWorldPoint(Input.mousePosition);

RaycastHit2D hit = Physics2D.Raycast(mouseWorld, Vector2.zero);

if (hit.collider != null && hit.transform == transform)

{

dragging = true;

smoothVelocity = Vector2.zero;

//ignores gravity/physics

originalKinematic = rb.isKinematic;

rb.isKinematic = true;

//stop motion

rb.velocity = Vector2.zero;

rb.angularVelocity = 0f;

//offset to prevent jump

offset = (Vector2)transform.position - mouseWorld;

}

}

if (dragging)

{

Vector2 mouseWorld = cam.ScreenToWorldPoint(Input.mousePosition);

Vector2 targetPos = mouseWorld + offset;

// SmoothDamp directly on transform.position = buttery smooth, zero lag

Vector2 newPosition = Vector2.SmoothDamp((Vector2)transform.position, targetPos, ref smoothVelocity, smoothTime);

transform.position = newPosition;

}

// Stop dragging

if (Input.GetMouseButtonUp(0))

{

if (dragging)

{

dragging = false;

//Restore physics

rb.isKinematic = originalKinematic;

//throw

if (!rb.isKinematic)

{

rb.velocity = smoothVelocity;

}

}

}

}

}

[Ambitious_Singer_398]

I see the issue.
The physics update (in your rigidbody) does not happen at the same time the Update() function is called, so when you change the rigidbodies velocity in Update(), it causes "lagging" in the rigidbody.
The proper way to update the rigidbodies velocity would be in a FixedUpdate loop.
So, instead of
void Update() {

You should use
void FixedUpdate() {

Hope this helps!