Change function?

[Winsterpin]

Hi sorry for a bit of the beginner question but I've been stumped. Is there a function in gm or one I can make where something happens every time the set value is changed? For example I would like to add one to my array every time my character changes direction. Any tips or wisdom from the more educated programmers?
Thanks!

 

[BattleRifle BR55]

Wherever you change the direction, update the array. To make it easier, you could just have an update script that does both and then you just call the script instead. However, it all depends on how your engine is set up, so the first option may be the more viable one.

 

[samspade]

It depends upon how you've set up your code. Posting that might be helpful. However, assuming you have direction saved in some variable then it can be as simple as this.

///create
dir = 1;
prev_dir = dir;


///step event or wherever it makes sense
if (prev_dir != dir) {
    prev_dir = dir
    ///do the thing you want
}

This might be helpful as well:

https://forum.yoyogames.com/index.php?threads/restricting-unwanted-repetition-with-flags.34455/

 

[Winsterpin]

That's so simple I can't believe I didn't think of that! Thanks so much!