First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+import ifcopenshell
+
+
+def add_layer(file: ifcopenshell.file, name: str = "Unnamed") -> ifcopenshell.entity_instance:
+    """Adds a new layer
+
+    An IFC layer is like a CAD layer. Portions of an object's geometry
+    (typically portions of its 2D linework) can be assigned to layers, which
+    can provide stylistic information such as line weights, colours, or
+    simply be used for filtering.
+
+    Layers have historically been used to organise CAD data and included in
+    ISO standards such as ISO 13567 or by the AIA. This alllows IFC data to
+    be compatible with older, 2D-oriented, layer-based workflows.
+
+    Some software that are still based on layers, such as Tekla or ArchiCAD
+    may also use this layer information for filtering.
+
+    :param name: The name of the layer. Defaults to "Unnamed".
+    :return: The newly created IfcPresentationLayerAssignment element
+
+    Example:
+
+        ifcopenshell.api.layer.add_layer(model, name="AI-WALL-FULL-DIMS-N")
+    """
+    return file.create_entity("IfcPresentationLayerAssignment", Name=name)