Toggle a boolean value, using one Rule and one Change Attribute

jeezzcake

BonepileGames

Great. I need to make one thing different from your tutorial - instead of when touch is clicked, when game.attribute%2=0. However, I do not know how to type game.attribute%2 in the first blank space (left one) in the expression editor or any other way.

tatiang

@BonepileGames‌

On the left side of the rule, instead of selecting attribute, select numeric expression.

You can then use the expression editor on the left side of the rule. Note that the "%" symbol is being phased out and it's recommended that you use mod(game.attribute,2)=0 instead.

Socks

Another useful toggle switch is to have an integer attribute (set at its default 0) - let's call it 'switch' - and to use it like this:

When touch is pressed: change switch to 1-switch

BonepileGames

@tatiang‌

Thank you for your response. However, is that available in Gamesalad Windows Creator since I am using Windows-based laptop right now, my lovely MacBook broke

The_Gamesalad_Guru

I'd like to know where he found out the not could be used in an expression? Is this a LUA command?

Armelline

@The_Gamesalad_Guru said:
I'd like to know where he found out the not could be used in an expression? Is this a LUA command?

I've seen @tatiang mention it before, but I think it's just one of those things that people discover by experimentation. I know I tried a whole bunch of other potential functions without any success.

I'd say you're right about it being because of the LUA roots though. It would also explain why you can do things like have a rule that says 10==10 = 1.

Another thing I've not seen mentioned before that works is ^. Try 10^5 and see what result gets outputted.

Would love to see access added for character classes (e.g. %a) to beef up the string functions. Just adding access to the classes built in to LUA would ramp up the power of GameSalad's string manipulation significantly. @dgackey @CodeWizard

It's also worth noting that the expression editor doesn't give you "real" access to the LUA underpinnings, so you can't do things like string.lower("AAAA") or string.reverse("ABCD"), sadly. It also seems the expression editor doesn't hook directly into the C numerical library, as we don't have things like cbrt(x) or isinf(x). It seems the GS team pick what gets allowed but don't always tell us

RThurman

@The_Gamesalad_Guru said:
I'd like to know where he found out the not could be used in an expression? Is this a LUA command?

If you are referring to the % operator, CodeMonkey mentioned it here:

http://forums.gamesalad.com/discussion/comment/412742/#Comment_412742

jeezzcake

@The_Gamesalad_Guru‌: I just typed it in to see if it works. And it did. Later i found out that this is a LUA function. That's the little story of "not".

The_Gamesalad_Guru

Lol @Rthurman i just did a video on that. No i was talking about using "NOT" as part of an expression. Yeah @Armelline‌ I tried a bunch of stuff from the lua libary to no avail.

tatiang

@BonepileGames said:
tatiang‌

Thank you for your response. However, is that available in Gamesalad Windows Creator since I am using Windows-based laptop right now, my lovely MacBook broke

@BonepileGames‌ I'm not terribly versed in Windows Creator (hoping to get VMWare running really soon though) and I assumed since this was in the Mac subforum that you were using Mac Creator. One thing you can do if there isn't a numerical expression choice is to create a constant by making a custom attribute game.ZERO equal to 0. Then make the rule If attribute game.ZERO = mod(game.attribute,2) then ... [behaviors]

It's just flipping the equation around so it still works the same.

RThurman

@The_Gamesalad_Guru said:
Lol Rthurman i just did a video on that. No i was talking about using "NOT" as part of an expression.

I believe it was @Orbz who introduced the idea of negating booleans (and the idea of using Boolean logic in the expression editor). That was back in the "Timers Are For Chumps" thread.