how can i limit position between 2 object ??

Question

hello everyone, i am new in unity, i just want make my object[2] can move around object[1], but not to far from object[1], it's just like pict 1, I have searched many solutions on the internet, but not many teach me how to limit position, is there anyone who can teach me. Thanks,, :D alt text

Answer 1

Here is a very basic joystick script.

Create two images with a circle shaped sprite.
Make the 2nd a child of the 1st one
Attach the following script to the child
Drag & drop the 1st circle (parent) into the parent field

Drag & drop the 2nd circle (child) into the rectTransform field

  using UnityEngine;
     using UnityEngine.EventSystems;

     public class Joystick : MonoBehaviour, IBeginDragHandler, IDragHandler
     {
         public RectTransform parent;
         public RectTransform rectTransform;
         private float radius;
         Vector2 offset;

         private void Start()
         {
             radius = rectTransform.sizeDelta.x;
         }

         public void OnBeginDrag( PointerEventData eventData )
         {
             Vector2 pos;
             RectTransformUtility.ScreenPointToLocalPointInRectangle( parent, Input.mousePosition, eventData.pressEventCamera, out pos );
             offset = rectTransform.anchoredPosition - pos;
         }

         public void OnDrag( PointerEventData eventData )
         {
             Vector2 pos;
             RectTransformUtility.ScreenPointToLocalPointInRectangle( parent, Input.mousePosition, eventData.pressEventCamera, out pos );
             Vector2 desiredPosition = pos + offset;

             if( desiredPosition.sqrMagnitude > radius * radius )
             {
                 desiredPosition = desiredPosition.normalized * radius;
             }
             rectTransform.anchoredPosition = desiredPosition;
         }
     }

INITIAL ANSWER

Your question is not very clear, any existing code would help.

But basically, you can limit the distance between Object2 and Object1 like this :

 public void LimitPosition( GameObject gameobject2, GameObject gameobject1, float maxDistance )
 {
     Vector3 position2 = gameobject2.transform.position;
     Vector3 position1 = gameobject1.transform.position;
     Vector3 direction = position2 - position1;
     float sqrDistance = direction.sqrMagnitude;
     if ( sqrDistance > maxDistance * maxDistance )
     {
         gameobject2.transform.position = direction.normalized * maxDistance + position1;
     }
 }

how can i limit position between 2 object ??

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INITIAL ANSWER

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