About Mathias Jonathan

Mathias Jonathan

API_DrawingType::anchorPoint is documented as "Placement reference by bounding box node (relevant only if not useOwnOrigoAsAnchor)" — nothing suggests it's output-only. However, I cannot find a way to actually set it through the API. Repro (minimal): Create a Drawing linked ...

Mathias Jonathan

Hi, I'm working on the open-source Tapir Archicad Add-On (JSON command layer on top of the C++ API), and I've hit what looks like a real gap in the public API around Layout Book Subsets. What I'm looking for:A way to (a) delete an existing Subset, and (b) modify the ID/numbe...

Mathias Jonathan · 2026-09-10

The API can create a View Map view outside the navigator hierarchy (no folder / no subset), and that view is then impossible to delete - by API or by hand Environment: - Archicad 27- macOS 14 Summary:Two connected problems, one root cause. 1. Creating a View Map view while...

Mathias Jonathan · 2026-09-04

Bonjour à tous, Je travaille depuis quelques temps déjà sur des scripts pour archicad, qui utilisent pour cela le projet opensource Tapir et langage de programmation python. Parmi les outils développés, j'ai un outil qui permet de générer le terrain (précision 1 point / m) +...

Mathias Jonathan · 2026-07-22

Context We're building a custom Archicad automation tool with Tapir, using its embedded browser palette feature (ShowScriptUI) to show an HTML-based UI for the script instead of a native dialog. While using it, we ran into a keyboard input bug that turned out not to be speci...

Mathias Jonathan

Afew follow-ups after more testing (Archicad 27, both via raw API calls and cross-checked with pixel measurements on exported layout images): 1. Correction to my own report above. I said calling ACAPI_Element_Change for an unrelated field also resets a UI-set anchor — that w...

Mathias Jonathan

I think that’s where we differ: I don’t see AI as hiding a shaky foundation, because the foundation isn’t what we’re building on with AI. The C++ API already does most of the heavy lifting when it comes to connecting to Archicad’s core. What we do in Tapir, for example, is m...

Mathias Jonathan

Fair point, I understand better what you mean now. On paper, I agree the C++ API isn’t the most pleasant to work with. In practice though, my experience has been quite different. Without any C++ knowledge, I was able to create a lot of new commands for Tapir with Claude. The...

Mathias Jonathan

I can’t speak for ChatGPT, but with an AI coding tool like Claude Code you can already do a lot with Archicad. There are limitations, yes, but they have nothing to do with a 2D-to-BIM workflow specifically. The key point is that the “translation” part (reading a 2D plan and ...

Mathias Jonathan

We are using an object like Barry's here, coupled with a python script using Tapir that place it, rotate it and scale it accordingly on top of each zone. It works well but we have to delete/launch the script again if there are too many modifications.

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API_DrawingType::anchorPoint is ignored by ACAPI_Element_Create and ACAPI_Element_Change

API function to delete or modify an existing Layout Book Subset

API can create a View Map view outside the navigator hierarchy- impossible to delete

Outil pour importer terrain + batiments dans archicad - Seulement France -

macOS: numeric-keypad digits steal focus to the Tracker with numbers in the browser

Re: API_DrawingType::anchorPoint is ignored by ACAPI_Element_Create and ACAPI_Element_Change

Re: Is Archicad at a disadvantage for AI-assisted scripting compared to Revit and Rhino?

Re: Is Archicad at a disadvantage for AI-assisted scripting compared to Revit and Rhino?

Re: Is Archicad at a disadvantage for AI-assisted scripting compared to Revit and Rhino?

Re: Show X & Y dimensions of zone tool in plan view..

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