How to perform an action on the top one of a stack of same object?

Question

Hi guys can someone help? I would like to have a stack of object and a button. And would like to delete the top one object of the stack when i push the button every single time until there is no one left on the screen. How can I achive this theorically and better if some code example. Thanks guys

Answer 1

One solution is to iterate through the objects in the stack, compare the y-value of the current object to the previously iterated object and assign the topmost y-value and node path to temporary variables. After the iteration is complete, delete the object with the topmost y-value:

var topmost = get_node("/root").get_rect().size.y
var temp_path = ""

for i in self.get_children():
    if i.get_global_pos().y < topmost:
        topmost = i.get_global_pos().y
        temp_path = get_path_to(i)

get_node(temp_path).queue_free()

Sample project download: https://drive.google.com/file/d/0BwnfZQAEnciAelcwNXM0MDdvQW8/view?usp=sharing