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shape_builder: warn about mixed item types in get_representation

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Bruno Postle
2026-03-06 15:18:55 +00:00
parent 06548c5db2
commit 1d56736d75
1 changed files with 14 additions and 2 deletions
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src/ifcopenshell-python/ifcopenshell/util/shape_builder.py
+14 -2
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@@ -1116,10 +1116,22 @@ class ShapeBuilder:
) -> ifcopenshell.entity_instance:
"""Create IFC representation for the specified context and items.
**All items must belong to the same geometry category.** IFC prohibits
mixing incompatible item types in one representation (e.g.
``IfcExtrudedAreaSolid`` with ``IfcBlock``, or solids with curves).
When ``representation_type`` is omitted the type is inferred via
:func:`ifcopenshell.util.representation.guess_type`; if the items are
heterogeneous ``guess_type`` returns ``None`` and the representation is
written with no ``RepresentationType``, which fails IFC validation.
Avoid mixing swept-solid primitives (``IfcExtrudedAreaSolid``,
``IfcRevolvedAreaSolid``) with CSG primitives (``IfcBlock``,
``IfcSphere``, etc.) or any other category in a single call.
:param context: IfcGeometricRepresentationSubContext
:param items: could be a list or single curve/IfcExtrudedAreaSolid
:param items: A single item or list of items, all of the same geometry
category (e.g. all ``IfcExtrudedAreaSolid``, all ``IfcIndexedPolyCurve``)
:param representation_type: Explicitly specified RepresentationType.
If not provided it will be guessed from the items types
If not provided it will be guessed from the items types.
:return: IfcShapeRepresentation
"""
if not isinstance(items, collections.abc.Iterable):