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Question by Thephil2988 · Mar 08, 2019 at 02:46 PM · movementcanvasimagecollider2drecttransform

Moving images around

I have two images in my scene that i want to enlarge when clicked on, and have them return to original after i click the enlarged image. This is my code:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.EventSystems;
 
 public class EnlargePictures : MonoBehaviour
 {
     RaycastHit2D image;
     public float startWidth;
     public float startHeight;
     public Vector3 startPos;
     RectTransform RT;
 
     public void Start()
     {
         //Fetches the RectTransform from image
         RT = this.GetComponent<RectTransform>();
 
         //Sets start values for position and size
         startWidth = RT.rect.width;
         startHeight = RT.rect.height;
         startPos = RT.localPosition;
     }
     
     public void Update()
     {   
         if (Input.GetMouseButtonUp(0))
         {
             //Raycasts, to see if the mouse has clicked on an image
             Vector2 worldPoint = Camera.main.ScreenToWorldPoint(Input.mousePosition);
             image = Physics2D.Raycast(worldPoint, Vector2.zero);
 
             //Cheks if the collider hit is a trigger
             if (image.collider.isTrigger)
             {
                 //Checks if the enlarged bool from DontDestry GameObject is true
                 if (!GameObject.Find("DontDestroy").GetComponent<EnlargeGlobal>().enlarged)
                 {
                     //Sets the Image position to (0,0), scales the size up and sets enlarged to true
                     Debug.Log("Image has been enlarged");
                     image.transform.position = new Vector2(0, 0);
                     GameObject.Find("DontDestroy").GetComponent<EnlargeGlobal>().enlarged = true;
                     image.transform.GetComponent<RectTransform>().sizeDelta = new Vector2(Screen.width / 1.6f, (Screen.width / 1.6f) * (startHeight / startWidth));
                 }
 
                 else
                 {
                     //Sets image size and position to the start values and sets enlarged to false
                     Debug.Log("Image has been minimized");
                     image.transform.GetComponent<RectTransform>().sizeDelta = new Vector2(startWidth, startHeight);
                     image.transform.GetComponent<RectTransform>().transform.localPosition = startPos;
                     GameObject.Find("DontDestroy").GetComponent<EnlargeGlobal>().enlarged = false;
                 }
             }
         } 
     }
 }
 

When i click on the left of the pictures it works like a charm, but the right picture (which has negative x value of the first one and same y value) does weird things. It enlarges first time, but minimizes weirdly on top of the left picture, and after that, minimizing any picture moves them out of the camera...

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avatar image CurtisGM · Mar 08, 2019 at 10:15 PM 0
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Hey Thephill2998!

Looking at the code that you posted, I noticed that when the image is being enlarged, the image's world position is being set:

 image.transform.position = new Vector2(0, 0);

Whereas when it is being $$anonymous$$imized, the image's local position is being set:

 image.transform.GetComponent<RectTransform>().transform.localPosition = startPos;
 // Which can be reduced to
 image.transform.localPosition = startPos;

This will undoubtedly produce undesired results. This might be why your second image is $$anonymous$$imizing over top of the first one (I cannot confirm this however). Try fixing that up and see what new results you get. :)

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