How do I select a specific instance of a spawned object

So I am making a tower defense game. I have an upgrade system that if you push a button the tower will upgrade but it is on every instance of the tower. How do I make it on a select instance of that tower rather than having the attributes be assigned to all of the towers at once?

You need a condition to pick the specific tower that you want to upgrade. There are many ways to do it. You could store the UID of the tower in a variable when you click the tower. Then when you click the button, you pick the tower with the stored UID and upgrade it.

ramones I have been trying to figure out the UID thing for a little bit, following the things in the forums but I am just not able to get it to work. Any way you can point me in the right direction?

I think "pick" is the word you're looking for.

search the forums/manual/tutorials for pick and UID and see if you can't find what you're looking for.

and if you can't, let me know, and I'll see what I can do!

Couple of examples:

This is the solution I have in a game I made.

I have an instance variable on it called ID, and I have also a variable let's say "Variable1", when spawning an object I set object.ID to variable1, and add 1 to variable1.. This way all the spawned objects will have IDs like 1...2...3...etc, then you can use Pick by comparison object where object.id equals whatever id you want.

Also for a TD game, I would think you needed to click the tower to upgrade it, so maybe you can pick the instance by overlapping point using Mouse.X and Mouse.Y

caiorosisca, yes this should work as what you are doing is essentially adding another UID to the object. It's not necessary because the object already has a UID, but I have been known to do this (and other similar things) in the past because it seems simpler. (It's not all that much simpler in fact, I just like using my own code).

Ramones Suggestion is what I would suggest (preferably the pick by Boolean, as it accounts for selecting multiple objects at once and doesn't have a global variable associated with it.)

ramones thank you for the capx files. I used them and altered them slightly to make it work for the most part. I am still tweaking things right now to make it work more for the game I am making but you set me on the right track. And every one else, thank you for your inputs I am trying to use a little of what everyone else has suggested also.

caiorosisca, yes this should work as what you are doing is essentially adding another UID to the object. It's not necessary because the object already has a UID

They are different, because UID's are not guaranteed to be sequential. But it is the same as IID + 1.