topic Re: AC processes a subroutine placed after the END: tag. AC in Libraries & objects

AC processes a subroutine placed after the END: tag. AC 8.1

Hubert Wagner — Wed, 24 May 2023 08:36:15 GMT

Hello:

I have a feeling I may have asked this question some time ago althought I can't find any record of it in the database.

I find AC will process a subroutine placed after the END: tag. This means I can't put a conditional branch in the main event.

I've written five door GDL which I attempted to combine into a single macro. It doesn't work because AC insists on running uncalled sub-routines.

Q: how do other users get around this problem.

Here is a simple example which illustrates the problem.

! 3D script
if first then
gosub 1
else
if second then
gosub 2
endif
endif

end:

1:
pen 10
circle 0.1
circle 0.05

2:
pen 1
circle 0.01

If both are false I get nothing.
If second is true and first is false, I get one circle, the correct one.
However, if first is true and second false, I get three circles which is incorrect.

Cordialement: DW

Re: AC processes a subroutine placed after the END: tag. AC

David Maudlin — Sat, 12 Feb 2005 15:02:22 GMT

Douglas:

You need to add a RETURN statement at the end of each subroutine, otherwise ArchiCAD doesn't know where the subroutine ends in order to return to the main event. You might find that looking at some of the objects that come with ArchiCAD helpful in catching these sort of organizational problems.

HTH

David

Re: AC processes a subroutine placed after the END: tag. AC

Aussie John — Sat, 12 Feb 2005 23:47:10 GMT

Yes you need returns
Also depending on what your script is trying to do it is might be easier to write your script as

if first then gosub 1
if second then gosub 2
end

1: subroutine1
return
2: subroutine2
return

of course your script might require first to be not true before second occurs so ignore above

Re: AC processes a subroutine placed after the END: tag. AC

David Collins — Sun, 13 Feb 2005 09:14:52 GMT

Also, you might want to google up the online version of the GDL Cookbook. There's a good section there on subroutines.