v0.3.0 – Material categories

The material categories of the template are reworked and now described in German and English: docs/material-categories.md lists all 28 categories with code, names, a short description, the parent category and the materials of the template that carry it. The English is our proposal; corrections by native speakers are welcome.

What changes

• New category Bahnen (membranes and foils): vapour control layer, roof underlay and PE film, until now under Abdichtung. Drawn as before.
• Soil types below Erdreich: Oberboden; BindigerBoden with Lehm, Ton, Schluff; NichtbindigerBoden with Sand and Kies. One material each in the template, drawn like Erdreich. They are meant as a start for describing ground in IFC, not only for hatching.
• Breaking: the former category Kies (placed gravel, e.g. drainage layer) is now Schuettung. Kies now stands for gravel as a soil type.
• Legend of Daemmung: "insulation" (heat and sound), no longer "thermal insulation".
• The template now has 47 materials in 28 categories and 234 types, as before.

Upgrading from v0.2.0

• Copy the new native_template.ifc (attached) and run scripts/install_style.py again, also with --project-assets for projects that already have drawings.
• In your own projects, change materials with category Kies that mean placed gravel to Schuettung.
• The GlobalIds of the material assignments in the template changed because materials were added; the GlobalIds of the types did not.

Checked

In Bonsai, a wall with one 20 cm layer per material of the template, plan at 1:50: all 28 categories reach the drawing with the hatch and line weight of din.css.

Known open points

• Line weights of doors and windows have not yet been checked by hand on a real model.
• The category Metall is filled black like Stahl; this will change.
• Line weight still follows the material category. The aim is to take it from the construction (structural or finishing) instead.

Tested with Blender 5.2.0 LTS, Bonsai 0.9.1 (unstable), IfcOpenShell 0.9.1a261106.