THIS WAS TAKEN FROM THEx4's SCRIPTING TUTORIAL, credit goes to THEx4
Before I continue. I'm going to just add something on flags.
Flags are very useful when you need an event to only occur once or if you want a person to disappear.
We can set a flag, and if we want an overworld, to dissappear we have to assign the set flag to the OW's, people ID in advancemap. But I'll go into more detail on that later.
Many flags are used within the game already. So if you plan on leaving scripts that are already in the rom, you'll need to be more careful on what flags you use, because flags can only really be used once.
If you want some flags that are not used in the rom as a start, here's a few. 0x200 - 0x29F, 500-79F, 1000-109F. But you'll find more if you experiment with them.
I'll have to do a bit of explaining here, so I'll start with preventing events to happen.
Code:
#org $start
lock
faceplayer
checkflag 0x200
if b_true goto $done
message $1
boxset 6
setflag 0x200
release
end
#org $done
message $2
boxset 6
clearflag 0x200
release
end
We've already covered
lock and
faceplayer, so we'll go to
checkflag.
checkflag checks if a flag has been set. Checkflag is usually followed by an
if line.
When using the
if line after
checkflag it contains either a
b_true or
b_false.
b_true, meaning, that if the flag is set
goto ${pointer}, and if not it will continue with the script. Similiarly,
b_false checks if the flag is NOT set, and if it isn't it will
goto ${pointer}, and if the flag is set, the script will continue without going to the pointer.
This pointer used in
if b_true goto $done it points to another part of the script as you can see in the script.
As you can see the
if b_true goto $done points to a different part of a script as shown with the
#org $done
Here we have a message and a new command,
clearflag.
Once flags are set they can be "unset" with the command
clearflag.
Clearflag has to be followed by the flag number.
And here we are at the end of the script.
But there is more than one way to use a flag. Some flags have some sort of game function. I'll explain that in the next part.
