About Corpora Geometrica

Corpora Geometrica · 2026-03-11

According to the Archicad 29 API documentation, the methods OpeningGeometry::{GetVectorX | GetVectorY} should return the x and y base vectors of an opening's local coordinate system, while OpeningGeometry::GetExtrusionDirection should return its direction vector. Based on th...

Corpora Geometrica · 2026-02-22

Hi everyone,I am looking for a minimal, practical example of how to create an API element in Archicad (such as API_HatchType, API_MeshType, or API_MorphType) that can represent a textured convex quadrilateral and is also visible on the floor plan.The geometry is straightforw...

Corpora Geometrica · 2025-11-25

Is there a reliable way to detect when a custom modeless palette (derived from DG::Palette and DG::PanelObserver) changes between docked and undocked states? I have tried experimenting with different (combinations of) event handlers provided by the DG::PanelObserver base cla...

Corpora Geometrica · 2025-10-07

I have two questions about handling menu items through the Archicad API. 1. Icons for sub‑menu itemsIs it possible to associate an icon with the "Sub-menu Item" provided in the following GRC file snippet?'STR#' ID_ADDON_MENU "Add-On Menu Strings" { /* [ ] */ "Main Menu Item"...

Corpora Geometrica · 2026-03-29

Thanks for the update, Tamás. I appreciate you checking with the developer and confirming that it is a known issue. The explanation about the local‑to‑global transformation makes sense, and it is helpful to know the root cause is already identified. I will keep an eye out fo...

Corpora Geometrica · 2026-03-13

My answer is similar to my earlier reply to your undo-monitoring question. To detect when an element is copied — whether by standard copy, drag‑copy, rotation, or mirroring — you must first attach an observer to every element that you want to track, by using ACAPI_Element_At...

Corpora Geometrica · 2026-03-12

Concerning the local coordinate system of openings, I would like to propose a correction to the Archicad 29 API, based on the technical details and source code presented below. 1 | SummaryThe function RetrieveOpeningLocalCoordinateSystem constructs a stable, right‑handed ort...

Corpora Geometrica · 2026-03-11

To help with debugging, I have prepared a small project file together with a short animation that demonstrates several polygonal walls with openings whose local coordinate systems appear inconsistent. Alongside the file, the following minimal code snippet can be used to insp...

Corpora Geometrica · 2026-03-11

Thanks, Tamás — I appreciate you checking with the developer. Please, keep me posted when you have any updates.

User Statistics

User activity

Inconsistent OpeningGeometry Local Coordinate System in Archicad 29 API

Creating a Textured Convex Quadrilateral via the Archicad API

Detecting dock/undock state changes of a custom DG::Palette

Adding Icons to Sub‑Menu Items and Changing Them Dynamically

Re: Inconsistent OpeningGeometry Local Coordinate System in Archicad 29 API

Re: Monitor copied-pasted elements

Re: Inconsistent OpeningGeometry Local Coordinate System in Archicad 29 API

Re: Inconsistent OpeningGeometry Local Coordinate System in Archicad 29 API

Re: Inconsistent OpeningGeometry Local Coordinate System in Archicad 29 API