Deleting GOs

Questions
#1

Hi,

I’ve implemented composite objects as collections of hierarchical GOs created by collection factories. Once such parnt object is hit, I decompose it, and re-parent all child objects to another GO in the main collection.
Should Ianually release child GOs when I remove ttheir new parent?

Thanks

#2

What do you mean by release? If you delete a game object you have the option to either:

  1. Delete the game object and all children using go.delete(id, true)
  2. Delete the game object and leave children alone using go.delete(id). The child objects will then have no parent.
#3

Here’s parts of my code in the main collection:

    function init(self)
        --[[ set up the plumbing ]]--
        self.board_id = hash("/board")
        msg.post(".", "acquire_input_focus")
    end

board is a GO defined in the main collection, so I assume there’s no need to create or delete it manually

Then I have this part:

local function handle_collision(self, obj_id)
    local children = get_children_go(self, obj_id)	
    for _, child_id in ipairs(children) do
        go.set_parent(child_id, self.board_id)
    end
    go.delete(obj_id)
end

called for a collision, so that all child objects are parented under board.
Should I delete all the child objects I set board as a parent in final() or they will be deleted as its children automatically ?

#4

You do not have to manually delete game objects when the game shuts down or when a collection is unloaded. This is taken care of by the engine.

#5

I guess it is the case of board being defined in the collection, right?

But if it was an object created by a tactory, would

go. delete(self. board_id, true)

delete objects I appended to it in handke_collision ?

#6

Yes, go.delete(id, true) will delete any child game objects at the time of deletion.

1 Like
#7

Thank you! Appreciate your time and effort