Weird offset in the multiselect box

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#1

i try change some things on the canvas but, didn’t helped as much, i don’t know how to fix it

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#2

Hi, best to post your code for the selection box so I can take a look.

#3 
private void ClearSelectionArea()
    {
      unitSelectionArea.gameObject.SetActive(false);

      if (unitSelectionArea.sizeDelta.magnitude == 0)
      {
        SingleUnitSelected();
        return;
      }

      Vector2 min = unitSelectionArea.anchoredPosition - (unitSelectionArea.sizeDelta / 2);
      Vector2 max = unitSelectionArea.anchoredPosition + (unitSelectionArea.sizeDelta / 2);
      
      foreach(var unit in _player.GetMyUnits())
      {
        if(SelectedUnits.Contains(unit)) continue;
        
        Vector3 screenPosition = _mainCamera.WorldToScreenPoint(unit.transform.position);
        bool unitIsInSelectedArea = screenPosition.x > min.x &&
                                    screenPosition.x < max.x &&
                                    screenPosition.y > min.y &&
                                    screenPosition.y < max.y;
        
        if (!unitIsInSelectedArea) continue;
        
        SelectedUnits.Add(unit);
        unit.Select();

      }
#4

Hi, can you please also post the UpdateSelectionArea() method?

#5 
private void Update()
    {
      _player ??= NetworkClient.connection.identity.GetComponent<RTSPlayer>();

      if (Mouse.current.leftButton.wasPressedThisFrame)
        StartSelectionArea();
      
      else if (Mouse.current.leftButton.isPressed)
        UpdateSelectionArea();
      
      else if (Mouse.current.leftButton.wasReleasedThisFrame)
        ClearSelectionArea();
    }

476×957 37.3 KB

476×957 35.1 KB

#6 
private void UpdateSelectionArea()
    {
        Vector2 mousePosition = Mouse.current.position.ReadValue();

        float areaWidth = mousePosition.x - startPosition.x;
        float areaHeight = mousePosition.y - startPosition.y;

        unitSelectionArea.sizeDelta = new Vector2(Mathf.Abs(areaWidth), Mathf.Abs(areaHeight));
        unitSelectionArea.anchoredPosition = startPosition +
            new Vector2(areaWidth / 2, areaHeight / 2);
    }

This is the method I am talking about, it’s where the bounds of the box are set.

#7

@fabriciohod if you still haven’t been able to fix this then, make sure that your anchors for your drag box are all zero.

#8

Hi! I got the same problem yesterday and after a lot of tinkering, I think I found a solution.
First: Make sure that on the Canvas, the UI scale mode is set to Constant Pixel Size, the Scale Factor is at 1 and the Reference Pixels per unit is at 100.

Then, click on the image that you’re transforming, and make sure that its Pivot point is at 0.5 on both the x and y-axis!

Best of Luck!!

1 Like
#9

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