SC2Mapster

Trigger
    Events
        UI - Player Any Player presses Escape key Down with shift Exclude, control Exclude, alt Exclude
    Local Variables
    Conditions
    Actions
        General - For each integer A from 0 to 8 with increment 1, do (Actions)
            Actions
                General - For each integer B from 0 to 8 with increment 1, do (Actions)
                    Actions
                        General - If (Conditions) then do (Actions) else do (Actions)
                            If
                                And
                                    Conditions
                                        A != 1
                                        B != 1
                                And
                                    Conditions
                                        A != 4
                                        B != 4
                                And
                                    Conditions
                                        A != 7
                                        B != 7
                            Then
                                Unit - Create 1 Marine for player 1 at (Point((86 + (A * 1)), (86 + (B * 1)))) using default facing (No Options)
                            Else

Hi! I want this to create a 9x9 grid of marines(for now), with 3 exceptions: row 1 column 1, row 4 column 4, and row 7 column 7.

However, row 1, 4, and 7, and column 1, 4, and 7, are devoid of marines.

Am I not doing it the right way?

You could go

if not((A == 1 and B == 1) or (A == 4 and B == 4) or (A == 7 and B == 7)) then create

But there are other possibilities using the laws of logic (if you like thinking)...

@Elmaex: Go

I've made a boolean array that works in a similar trigger. I do like thinking, but I think it should work as it is. So I'm curious why it doesn't.

At the moment you require A!=1 and B!=1 and A!=4 and B!=4 and A!=7 and B!=7. The three conditions you put there are interpreted as an "and" if you don't specify otherwise.

@Elmaex: Go

That's right, all three 'And' conditions must return true for a marine to spawn, but that's how it should be as far as I can see.

What isn't working about it? Is it not spawning marines at all?

Take A = 1 B = 2. This does not satisfy A !=1 and hence no marine is created.

edit: I think I now understand your reasoning. Your mistake:

not ( A and B) is not equivalent to not(A) and not(B)

Quote from GalacticCat: Go

@Elmaex: Go

That's right, all three 'And' conditions must return true for a marine to spawn, but that's how it should be as far as I can see.

Incorrect logical. It would be EACH of the three "and" conditions, not all three at once. A or b can't be three things at once. In its current state you might as well restructure it to just have everything under one giant "and" instead of 3 seperations.

make an "or" element in your if statement, then move all of your and statements into the "or".

@GI70ST: Go

That would be another awesome way of doing it wrong. Take A=1,B=1 => (A!=4 and B!=4) = true => or (....) = true.

@Elmaex: Go