Books and documentation are available on GDL and object library development.
•See the GDL Center, GRAPHISOFT’s GDL knowledge base, at gdl.graphisoft.com.
•The GDL Reference Guide will help you learn to apply ARCHICAD’s powerful Geometric Description Language for dressing up your Project with objects, ornaments and other details of your own design. It includes a section on Basic Technical Standards.
See its PDF version in the ARCHICAD > Documentation folder or in the ARCHICAD Help > Documentation menu.
•David Nicholson Cole’s GDL Cookbook, aimed at both entry-level and advanced GDL programmers, is available free at http://www.nottingham.ac.uk/~lazwww/cookbook/.
Relevant topics
Railing Tool – Further Enhancements
The Railing tool has been further enhanced based on market feedback.
Sloped Railings: Vertical and Horizontal Endings
Rail Panel: ...
Stair Tool – Further Enhancements
The flagship feature of ARCHICAD 21 has been enhanced with new features and improvements, based on market feedback.
Stair Headroom ...
GDL Object Editor
The GDL Object Editor contains all controls needed to edit a GDL object.
For a detailed description of scripting commands and object-level ...