98 lines
3.6 KiB
Python
98 lines
3.6 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2026 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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# This file was generated with the assistance of an AI coding tool.
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from typing import Optional
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import ifcopenshell
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_ITEM_TYPE_TO_REP_TYPE = {
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"IfcVertex": "Vertex",
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"IfcVertexPoint": "Vertex",
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"IfcEdge": "Edge",
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"IfcOrientedEdge": "Edge",
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"IfcEdgeCurve": "Edge",
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"IfcEdgeLoop": "Edge",
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"IfcPath": "Edge",
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"IfcFace": "Face",
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"IfcFaceSurface": "Face",
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"IfcAdvancedFace": "Face",
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"IfcClosedShell": "Face",
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"IfcOpenShell": "Face",
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"IfcConnectedFaceSet": "Face",
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}
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def add_topology_representation(
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file: ifcopenshell.file,
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context: ifcopenshell.entity_instance,
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item: ifcopenshell.entity_instance,
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representation_identifier: Optional[str] = None,
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representation_type: Optional[str] = None,
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) -> ifcopenshell.entity_instance:
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"""Adds an IfcTopologyRepresentation for a structural element
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Structural analysis elements (IfcStructuralSurfaceMember,
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IfcStructuralCurveMember) use topology representations rather than solid
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geometry. This is analogous to :func:`add_axis_representation` and
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:func:`add_profile_representation` but produces an
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IfcTopologyRepresentation instead of an IfcShapeRepresentation.
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The representation type ("Face", "Edge", "Vertex") is inferred from the
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item's IFC class if not provided explicitly.
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:param context: The IfcGeometricRepresentationContext for the
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representation, typically a Reference context.
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:param item: The IfcTopologicalRepresentationItem (e.g. IfcFaceSurface,
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IfcEdge) to include in the representation.
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:param representation_identifier: The RepresentationIdentifier string.
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Defaults to the context's ContextIdentifier.
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:param representation_type: The RepresentationType string ("Face",
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"Edge", "Vertex"). Inferred from item class if not given.
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:return: The newly created IfcTopologyRepresentation entity.
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Example:
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.. code:: python
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context = ifcopenshell.util.representation.get_context(
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model, "Model", "Reference", "GRAPH_VIEW")
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face = model.createIfcFaceSurface(bounds, surface, True)
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rep = ifcopenshell.api.geometry.add_topology_representation(
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model, context=context, item=face)
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ifcopenshell.api.geometry.assign_representation(
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model, product=member, representation=rep)
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"""
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if representation_identifier is None:
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representation_identifier = context.ContextIdentifier
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if representation_type is None:
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for ifc_class, rep_type in _ITEM_TYPE_TO_REP_TYPE.items():
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if item.is_a(ifc_class):
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representation_type = rep_type
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break
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else:
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representation_type = "Undefined"
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return file.createIfcTopologyRepresentation(
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context,
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representation_identifier,
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representation_type,
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[item],
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)
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