Dragging downwards only

Questions & Answers
1

So I have an event trigger that when holding and dragging through the screen will increase the power bar. The thing is I need it to only drag downwards in order for the power bar to increase. Any solutions?

2

I think you need save your mouse position, then if current mouse position y lower than previous one, increase your power.
Here is an example :

  float prevMouseY;
    
    void OnDrag(){
    var pos = Input.mousePosition;
    if(prevMouseY == 0){
    prevMouseY = pos.y;
    return; 
    
    }
    if(pos.y < prevMouseY){
    //increase power code here.
    }
    prevMouseY = pos.y;
    }