How do I save the game state for undo/redo

I would like to save the last 10 entire game states to the memory - not to a local storage! I tried to use the "Dictionary" to implement this, but it doesn't work properly!

Do I have to use the local storage to save the entire game state for the undo/redo? or can I use the dictionary to do this?

Note: I just need the saved game states for the "undo/redo" during the game play!

May you advise please?

I'll be so much appreciated if you could send me a simple capx for this!

Thanks in advance!

Just solved it. Hurray a time machine

undo-redo_block.capx

warning: no array get involved

Undo-redo feature is common mechanic in various puzzle game. The example showing how block movement can be undo or redo. The concept is very simple; Each time player drag the block to a new position, the information are stored into dedicated separate text object by append x and y value.

When the player need to cancel or recall last position, the system just need to iterate using tokenat. Even the system updated in the middle of interfere. I had this solution around my head, but just actuate it just now.

Thanks alot alextro for your reply and capx!

But my game is something like dress-up games. I have many objects, each object has its own properties (width, height, frame number, animation, scale, color, .. etc) - not only the position of one object

And I need to detect user actions as (rotate, duplicate, delete, etc .. ) to be able to undo/redo!

So I think in saving the entire game state once an action happen by somehow!

Any ideas?

The simplest way to get you want is just use save option. Each time player make a change, system will trigger saving action into an iteration name like "save1", "save2", etc, adding 1 into a variable value. To move back & forth between changes, my undo-redo example did that exactly. You just need to replace the x or y value into save slot then load them when needed.

So make sure you make entire save-trigger system record every changes made by player and only at certain condition such as ' isn't touching object, trigger once'.

Great, I will try to do it this way.

Thank you so much alextro!