063 Fix Archicad GDL Story Display ac_toplevel

Why do GDL objects in Archicad show on the wrong stories, or disappear completely?

It usually comes down to ac_bottomlevel and ac_toplevel, and how Archicad interprets your object’s vertical range.

Using a simple test object, I demonstrate how incorrect values cause objects to disappear or appear on the wrong levels, and how to fix it by properly defining the vertical range in your parameter script.

I also walk through:

The relationship between ac_toplevel and ZZYZX
Why Archicad’s behaviour can seem inconsistent
How bounding boxes are calculated (and why they don’t always match expectations)
Practical examples of controlling story display in real objects

Once you understand this, you can control exactly where your objects appear - instead of fighting Archicad’s defaults.

Completed in Archicad 29.

Time Codes:
00:00 Problem: Object showing on wrong stories
01:11 What ac_bottomlevel & ac_toplevel do
02:04 Demonstration with test object
02:40 Test object setup
09:22 Relationship with ZZYZX
11:04 Bounding box behaviour explained
12:46 Summary
13:27 Real-world examples
15:27 Wrap-up
Key Concepts
Archicad GDL story display
ac_bottomlevel and ac_toplevel explained
GDL object vertical extent
Show on Relevant Stories behaviour
Bounding box calculation in Archicad

Related
If you’re building GDL objects, understanding how Archicad interprets them is critical to making them reliable in documentation.

If you found this useful, consider subscribing for more practical Archicad + GDL workflows.

Links
Other videos:
https://youtu.be/IGXMHjRGO_g

Online help: https://gdl.graphisoft.com
Community Forum: https://community.graphisoft.com
GDL forum: https://community.graphisoft.com/t5/GDL/bd-p/forum-gdl

Intro & Outro music:
"Cool Intro" & “Beauty Flow” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

Видео 063 Fix Archicad GDL Story Display ac_toplevel канала Barking Dog BIM