I’m having an issue where my app so far is working perfectly in Unity but after transferring it to an android tablet, it seems the co-ordinates I’m using to bind an area are off quite significantly.

2nd picture showing how the same bindings behave on an android device.

I am using ‘ScreenToWorldPoint’ with the mouse position in both instances. I can’t work out why there is a difference with the binding. The editor is set to using the same aspect ratio as the tablet device.

private void DrawMode() {

    if (Input.GetKeyDown(KeyCode.Mouse0)) {
        CreateBrush();
    }
    else if (Input.GetKey(KeyCode.Mouse0)) {

        Vector2 mousePos = mainCam.ScreenToWorldPoint(Input.mousePosition);

        Debug.Log("Before 'if':" + mousePos + _lastPos);

        if (mousePos != _lastPos) {
            Debug.Log("Into 'if'");
            AddPoint(mousePos);
            _lastPos = mousePos;
            Debug.Log(mousePos + " " + _lastPos);
        }
    }
    else if (Input.GetKeyUp(KeyCode.Mouse0)) {
        RepositionLine(_currentLineRenderer);
    }
    else {
        _currentLineRenderer = null;
    }
}

private void AddPoint(Vector2 pointPos) {

    _currentLineRenderer.positionCount++;
    int posIndex = _currentLineRenderer.positionCount - 1;
    _currentLineRenderer.SetPosition(posIndex, pointPos);

    Debug.Log("AddPoint mousePos: " + pointPos);
}

Any assistance would be appreciated.