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
+import ifcopenshell.util.element
+
+
+def copy_material(file: ifcopenshell.file, material: ifcopenshell.entity_instance) -> ifcopenshell.entity_instance:
+    """Copies a material or material set
+
+    All material psets and styles are copied. The copied material is not
+    associated to any elements.
+
+    If a material set is copied, the set items are also copied. However the
+    underlying materials (and profiles) used within the set items are reused.
+
+    If a material is associated with a presentation style, that presentation
+    style is reused.
+
+    :param material: The IfcMaterialDefinition to copy
+    :return: The new copy of the material
+
+    Example:
+
+    .. code:: python
+
+        concrete = ifcopenshell.api.material.add_material(model, name="CON01", category="concrete")
+
+        # Let's duplicate the concrete material
+        concrete_copy = ifcopenshell.api.material.copy_material(model, material=concrete)
+    """
+    if material.is_a("IfcMaterial"):
+        return _copy_material_with_inverses(file, material)
+    elif material.is_a("IfcMaterialConstituentSet"):
+        new = _copy_material_with_inverses(file, material)
+        new.MaterialConstituents = [copy_material(file, i) for i in material.MaterialConstituents]
+        return new
+    elif material.is_a("IfcMaterialConstituent"):
+        return _copy_material_with_inverses(file, material)
+    elif material.is_a("IfcMaterialLayerSet"):
+        new = _copy_material_with_inverses(file, material)
+        new.MaterialLayers = [copy_material(file, i) for i in material.MaterialLayers]
+        return new
+    elif material.is_a("IfcMaterialLayer"):
+        return _copy_material_with_inverses(file, material)
+    elif material.is_a("IfcMaterialProfileSet"):
+        new = _copy_material_with_inverses(file, material)
+        new.MaterialProfiles = [copy_material(file, i) for i in material.MaterialProfiles]
+        return new
+    elif material.is_a("IfcMaterialProfile"):
+        return _copy_material_with_inverses(file, material)
+    elif material.is_a("IfcMaterialList"):
+        return _copy_material_with_inverses(file, material)
+    else:
+        raise Exception(f"Unexpected material type: '{material.is_a()}' ({material}).")
+
+
+def _copy_material_with_inverses(
+    file: ifcopenshell.file, material: ifcopenshell.entity_instance
+) -> ifcopenshell.entity_instance:
+    new = ifcopenshell.util.element.copy(file, material)
+    for inverse in file.get_inverse(material):
+        if inverse.is_a("IfcMaterialProperties"):
+            # Properties must not be shared between objects for convenience of authoring
+            inverse = ifcopenshell.util.element.copy(file, inverse)
+            inverse.Material = new
+
+            props_attribute = "Properties"
+            if file.schema == "IFC2X3":
+                if not inverse.is_a("IfcExtendedMaterialProperties"):
+                    continue
+                props_attribute = "ExtendedProperties"
+
+            props = getattr(inverse, props_attribute)
+            if not props:
+                continue
+
+            copied_props = []
+            for pset in props:
+                copied_props.append(ifcopenshell.util.element.copy_deep(file, pset))
+            setattr(inverse, props_attribute, copied_props)
+
+        elif inverse.is_a("IfcMaterialDefinitionRepresentation"):
+            inverse = ifcopenshell.util.element.copy_deep(
+                file, inverse, exclude=["IfcRepresentationContext", "IfcMaterial", "IfcPresentationStyle"]
+            )
+            inverse.RepresentedMaterial = new
+    return new