Designing Games with Game Maker - YoYo Games

}
obj[1].id.x = 12;
The last statement should be read as follows. We take the id of the first flag. For the instance
with that id we set the x coordinate to 12.
Object names, the special objects, and the instance id's can also be used in a number of
functions. They are actually treated as constants in the programs.
Arrays
You can use 1- and 2-dimensional arrays in GML. Simply put the index between square
brackets for a 1-dimensional array, and the two indices with a comma between them for 2-
dimensional arrays. At the moment you use an index the array is generated. Each array runs
from index 0. So be careful with using large indices because memory for a large array will be
reserved. Never use negative indices. The system puts a limit of 32000 on each index and
1000000 on the total size. So for example you can write the following:
{
}
a[0] = 1;
i = 1;
while (i < 10) { a[i] = 2*a[i-1]; i += 1;}
b[4,6] = 32;
If statement
An if statement has the form
or
if ()
if () else