Expression Gate Documentation

[_Snake?Eye^_|Marsh]

the modulo do something like:
4/5=2+1/5
so it only give you the value that they cant divide whitout using fraction(1 in this equation)

Thanks, I actually realized that while testing it, but i thought it might had some further actions :P.. Usefull i guess, once i get some good ideas.^_^

[hexpunK]

Sorry for the bump, but this is useful after all. Anyway, I have a slight problem with Expression, I am trying to make a simple little Tank Controlling expression, problem is I can get the wheels to turn how I need, but they don't stop, then when i add something to make them stop, they don't turn. I know I am probably missing something important, I just can't figure out what it is.

N@Tank Controls
I@W A S D
O@Left Right
W == 1 -> Left=1 Right=1;
W == 0 -> Left=0 Right=0;
A == 1 -> Left=-1 Right=1;
A == 0 -> Left=0 Right=0;
S == 1 -> Left=-1 Right=-1;
S == 0 -> Left=0 Right=0;
D == 1 -> Left=-1 Right=1;
D == 0 -> Left=0 Right=0;

Any help is appreciated.

[Syranide]

Sorry for the bump, but this is useful after all. Anyway, I have a slight problem with Expression, I am trying to make a simple little Tank Controlling expression, problem is I can get the wheels to turn how I need, but they don't stop, then when i add something to make them stop, they don't turn. I know I am probably missing something important, I just can't figure out what it is.

N@Tank Controls
I@W A S D
O@Left Right
W == 1 -> Left=1 Right=1;
W == 0 -> Left=0 Right=0;
A == 1 -> Left=-1 Right=1;
A == 0 -> Left=0 Right=0;
S == 1 -> Left=-1 Right=-1;
S == 0 -> Left=0 Right=0;
D == 1 -> Left=-1 Right=1;
D == 0 -> Left=0 Right=0;

Any help is appreciated.

Absolutely, this thread is intended to help people so ask as much as you want.

Your problem is quite common actually, if you look closely at each of your keys, you'll notice they are either PRESSED or NOT PRESSED. And depending on which it is, you set _ALL_ the parameters. Meaning, that any previous changes will have no effect.

This is one way of fixing it: (Also, note that you don't have to write == 1)

N@Tank Controls
I@W A S D
O@Left Right
Left = Right = 0
W -> Left=1, Right=1;
A -> Left=-1, Right=1;
S -> Left=-1, Right=-1;
D -> Left=1, Right=-1;

EDIT: And I could recommend switching to Expression2, it is superiour in every way, your code would look like this in E2 if you want to try it out (it also support if-else-statements which are really handy):

@name Tank Controls
@inputs W A S D
@outputs Left Right
Left = Right = 0
if(W) { Left=1, Right=1 }
if(A) { Left=-1, Right=1 }
if(S) { Left=-1, Right=-1 }
if(D) { Left=1, Right=-1 }

[Jimlad]

And I could recommend switching to Expression2, it is superiour in every way, your code would look like this in E2 if you want to try it out (it also support if-else-statements which are really handy):

I'm going to echo what Syranide said just to reinforce the point: I can't see much reason to use E1, when E2 is much more refined, easier to read and write, and more powerful in many ways. I would strongly advise immediately forgetting about E1 and switching over. It really surprises me that people still write in E1. Maybe they think it'll be easier because of the name? I don't know.

[hexpunK]

Thanks for the reply Syranide, that helped me a lot, I haven't had tome to test it due to reformatting my PC (evil virus that ate almost everything suddenly, I was sure I quarantined it...). I thought I had gone wrong with something like that, i was using Zeos Panteras Dual input steering as a base, and I was thinking about the E2 equivalent, but couldn't quite figure it out while I was playing.

EDIT: Normally I do try and use E2, but as I am still learning it a bit, I thought I might try E1 due to the slightly more simple way to do things like this, and that I had used it before.

[chinoto]

They are exactly the same as far as simple math. Heres my version of the code:

N@Tank Controls
I@W A S D
O@Left Right
Left =sgn(W-A-S+D)
Right=sgn(W+A-S-D)

[Syranide]

They are exactly the same as far as simple math. Heres my version of the code:

N@Tank Controls
I@W A S D
O@Left Right
Left =sgn(W-A-S+D)
Right=sgn(W+A-S-D)

Not the same, with that you can control the tracks individually (e.g. turn the left track but not the right), the initial codes does not allow that.

[chinoto]

I was talking about E1 and E2 being the same as far as simple math.

[mooserider12]

im trying to make it so when a round wired to a timer is 1, a hydraulic is zero. i enterd this code:
length = 117 (example)
timer == 1 -> length = 0

so yeah.. when i do I cant spawn it and it says "expected symbol (() near (==) at line 1". help! i might just add i have gmod 10 if that affects anything.

[Syranide]

you can't write "(example)" in your code, if that's a comment then use "... #example".
Otherwise, if what you posted is what you really wrote as an expression, it looks fine, except that you forgot a ; after "length = 0".