koobas.hobune.stream
Drag Item Scaling on Phone
I implemented a drag and drop system that works very well using the mouse using the drag and pointer interfaces (IDragHandler etc.). To determine the amount to move my object on drag, I divide the eventData delta by the scale factor of the canvas. This does not work on a phone, with finger dragging unfortunately. How would I implement something similar for an iphone or android?
This is the gist of the code:
public void Start()
{
//...
//this is a vector2
m_scaleFactor = canvas.GetComponent<RectTransform>().localScale;
}
public void OnDrag(PointerEventData eventData)
{
if (!Active)
return;
//used to reference canvas.scaleFactor
m_rectTransform.anchoredPosition += eventData.delta / m_scaleFactor;
onDragAction?.Invoke(eventData);
}
EDIT: this is actually an aspect ratio issue. I can reproduce by changing the aspect ratio in the editor. Still not sure what to scale by in order to fix though.
