topic Re: Using global id as a start for numbering in object in Libraries & objects

Using global id as a start for numbering in object

jshuether — Tue, 08 Dec 2009 01:08:44 GMT

I'm trying to create a object that will number itself in 2D, but the starting number is not always 1 (similar to Parking Place 10.gsm).

for j=1 to n-1
add2 a/n,0
text2 0,0,j+start_num-1
next j
del j-1

start_num is an integer variable.

It works unless I include the following code:

if use_glob_id then
start_num = glob_id
endif
When including this code in the Master Script, despite whether use_glob_id = 1 or 0, I get the incompatible expression types error. What do I have to do to get the numerical number from the glob_id into my text to begin the numbering of my object?

Side note: I've always wanted to be able to add select variables of an object to the Info Box to minimize the opening and closing of dialog boxes.

Re: Using global id as a start for numbering in object

Barry Kelly — Tue, 08 Dec 2009 02:32:02 GMT

The GLOB_ID is a string rather than a number.
So I would say you would have to use the SPLIT command to filter out the number component.
However your GLOB_ID will always have to be in the same format - the user can type what ever they want in there.
Type something other than what is expected in the ID and the script won't work again.

I am guessing you would rather use the ID in the info box but you will be better off creating an parameter (integer) in the object that means only a number can be used.
You can even control the range of numbers allowed to block out negatives or zero values.

Barry.

Re: Using global id as a start for numbering in object

jshuether — Tue, 08 Dec 2009 17:59:03 GMT

I figured it was the SPLIT function, I was just writing it incorrectly. I originally failed to put '%n' in quotes. After a quick check of the GDL Cookbook, I found my error.

The working code is:

if use_glob_id then
x=SPLIT(GLOB_ID,'%n',start_num)
PARAMETERS start_num=start_num
endif