128 lines
5.8 KiB
Python
128 lines
5.8 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 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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import ifcopenshell.util.representation
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def assign_profile(
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file: ifcopenshell.file, material_profile: ifcopenshell.entity_instance, profile: ifcopenshell.entity_instance
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) -> None:
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"""Changes the profile curve of a material profile item in a profile set
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In addition to changing the profile curve, it will also change the
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profile curve used in any body representation extrusions.
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:param material_profile: The IfcMaterialProfile to change the profile
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curve of. See ifcopenshell.api.material.add_profile to see how to
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create profiles.
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:param profile: The IfcProfileDef to set the profile item's curve to.
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:return: None
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Example:
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.. code:: python
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# Let's imagine we have a steel I-beam. Notice we are assigning to
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# the type only, as all occurrences of that type will automatically
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# inherit the material.
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beam_type = ifcopenshell.api.root.create_entity(model, ifc_class="IfcBeamType", name="B1")
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# First, let's create a material set. This will later be assigned
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# to our beam type element.
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material_set = ifcopenshell.api.material.add_material_set(model,
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name="B1", set_type="IfcMaterialProfileSet")
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# Create a steel material.
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steel = ifcopenshell.api.material.add_material(model, name="ST01", category="steel")
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# Create an I-beam profile curve. Notice how we name our profiles
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# based on standardised steel profile names.
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hea100 = model.create_entity(
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"IfcIShapeProfileDef", ProfileName="HEA100", ProfileType="AREA",
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OverallWidth=100, OverallDepth=96, WebThickness=5, FlangeThickness=8, FilletRadius=12,
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)
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# Define that steel material and cross section as a single profile
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# item. If this were a composite beam, we might add multiple profile
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# items instead, but this is rarely the case in most construction.
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profile_item = ifcopenshell.api.material.add_profile(model,
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profile_set=material_set, material=steel, profile=hea100)
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# Great! Let's assign our material set to our beam type.
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ifcopenshell.api.material.assign_material(model, products=[beam_type], material=material_set)
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# Let's create an occurrence of this beam.
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beam = ifcopenshell.api.root.create_entity(model, ifc_class="IfcBeam", name="B1.01")
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ifcopenshell.api.material.assign_material(model,
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products=[beam], type="IfcMaterialProfileSetUsage")
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# Let's give a 1000mm long beam body representation.
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body = ifcopenshell.api.geometry.add_profile_representation(
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context=body_context, profile=hea100, depth=1000)
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ifcopenshell.api.geometry.assign_representation(model, product=beam, representation=body)
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ifcopenshell.api.geometry.edit_object_placement(model, product=beam)
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# Now let's change the profile to a HEA200 standard profile instead.
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# This will automatically change the body representation that we
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# just added as well to a HEA200 profile.
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hea200 = model.create_entity(
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"IfcIShapeProfileDef", ProfileName="HEA200", ProfileType="AREA",
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OverallWidth=200, OverallDepth=190, WebThickness=6.5, FlangeThickness=10, FilletRadius=18,
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)
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ifcopenshell.api.material.assign_profile(model, material_profile=profile_item, profile=hea200)
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"""
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usecase = Usecase()
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usecase.file = file
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return usecase.execute(material_profile, profile)
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class Usecase:
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file: ifcopenshell.file
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def execute(self, material_profile: ifcopenshell.entity_instance, profile: ifcopenshell.entity_instance) -> None:
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# TODO: handle composite profiles
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old_profile = material_profile.Profile
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material_profile.Profile = profile
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for profile_set in material_profile.ToMaterialProfileSet:
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for inverse in self.file.get_inverse(profile_set):
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if not inverse.is_a("IfcMaterialProfileSetUsage"):
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continue
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if self.file.schema == "IFC2X3":
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for rel in self.file.get_inverse(inverse):
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if not rel.is_a("IfcRelAssociatesMaterial"):
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continue
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for element in rel.RelatedObjects:
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self.change_profile(element, profile)
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else:
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for rel in inverse.AssociatedTo:
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for element in rel.RelatedObjects:
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self.change_profile(element, profile)
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if old_profile and self.file.get_total_inverses(old_profile) == 0:
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# TODO: check remove deep
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self.file.remove(old_profile)
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def change_profile(self, element: ifcopenshell.entity_instance, profile: ifcopenshell.entity_instance) -> None:
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representation = ifcopenshell.util.representation.get_representation(element, "Model", "Body", "MODEL_VIEW")
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if not representation:
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return
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for subelement in self.file.traverse(representation):
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if subelement.is_a("IfcSweptAreaSolid"):
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subelement.SweptArea = profile
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