How to drag around an object and making it collide with other object 2D

Question

Well i simply wanna make my sprite draggable with mouse/tap and colliding with other object's. So far i found alot of scripts on the internet to move my object around but i cant make it collide with enything and some of the tutorials about this are old.

So if u can send me to a proper tutorial that includes code or write me one i will probobly understand it since i cannot write my own :(

I will be very thankfull !

Answer 1

Best Answer

Answer by Cornelis-de-Jager · Oct 05, 2017 at 11:19 PM

Add the following the gameobject you want to drag. Create a scritp called Drag

 using UnityEngine;
 using System.Collections;
 
 [RequireComponent(typeof(BoxCollider))]
 
 public class Drag : MonoBehaviour {
     private Vector3 screenPoint;
     private Vector3 offset;
 
 void OnMouseDown() {
 
     offset = gameObject.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z));
 }
 
 void OnMouseDrag()
 {
     Vector3 curScreenPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
     Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenPoint) + offset;
     transform.position =  Vector3.Lerp (transform.position, curPosition, Time.deltatime);
 }
 }

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The_ZayNepz_Guy · 22 hours ago 0

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Hey, thanks a lot for the script.

I tried adding it but didn't get it working, but would there be a way to add a public float to control the speed of the object being dragged? Like, if I want some objects be feel heavier than others?

Answer 2

Answer by ematsuno · Jan 25, 2019 at 06:54 PM

screenPoint is null on Mousedown, but you're on the right track.

Here's a simple version that does not account for the offset of the mouse-location and the object's offset:

  float camDistance;
 private void OnMouseDown()
 {
     camDistance = Vector3.Distance(transform.position, Camera.main.transform.position);
 }
 private void OnMouseDrag()
 {
     Vector3 mousePosition = new Vector3(Input.mousePosition.x, Input.mousePosition.y, camDistance);
     Vector3 objPosition = Camera.main.ScreenToWorldPoint(mousePosition);
     transform.position = Vector3.Lerp(transform.position, objPosition, Time.deltaTime);
 }

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The_ZayNepz_Guy · 22 hours ago 0

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Hey, thanks a lot for the script.

I tried adding it but didn't get it working, but would there be a way to add a public float to control the speed of the object being dragged? Like, if I want some objects be feel heavier than others?

How to drag around an object and making it collide with other object 2D

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