First Commit
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# 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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from typing import Any
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import ifcopenshell.geom
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import ifcopenshell.util.representation
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import ifcopenshell.util.shape
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from ifcopenshell.geom import ShapeType
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def edit_profile_usage(
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file: ifcopenshell.file, usage: ifcopenshell.entity_instance, attributes: dict[str, Any]
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) -> None:
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"""Edits the attributes of an IfcMaterialProfileSetUsage
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This is typically used to change the cardinal point of the profile.
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The cardinal point represents whether the profile is extruded along the
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center of the axis line, at a corner, at a shear center, at the bottom,
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top, etc.
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For more information about the attributes and data types of an
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IfcMaterialProfileSetUsage, consult the IFC documentation.
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:param usage: The IfcMaterialProfileSetUsage entity you want to edit
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:param attributes: a dictionary of attribute names and values.
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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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rel = ifcopenshell.api.material.assign_material(model, material=material_set,
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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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# Let's change the cardinal point to be the top center of the axis
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# line. This is represented by the number "8". Consult the IFC
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# documentation for all the numbers you can use.
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ifcopenshell.api.material.edit_profile_usage(model,
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usage=rel.RelatingMaterial, attributes={"CardinalPoint": 8})
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"""
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usecase = Usecase()
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usecase.file = file
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return usecase.execute(usage, attributes)
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class Usecase:
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file: ifcopenshell.file
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def execute(self, usage: ifcopenshell.entity_instance, attributes: dict[str, Any]) -> None:
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self.usage = usage
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self.attributes = attributes
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self.cardinal_point = attributes.get("CardinalPoint")
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if self.cardinal_point and self.cardinal_point != usage.CardinalPoint:
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self.update_cardinal_point()
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for name, value in attributes.items():
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setattr(usage, name, value)
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def update_cardinal_point(self):
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material_set = self.usage.ForProfileSet
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self.profile = material_set.CompositeProfile
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if not self.profile and material_set.MaterialProfiles:
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self.profile = material_set.MaterialProfiles[0].Profile
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if not self.profile:
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return
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self.position = self.calculate_position()
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if self.file.schema == "IFC2X3":
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for rel in self.file.get_inverse(self.usage):
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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.update_representation(element)
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else:
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for rel in self.usage.AssociatedTo:
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for element in rel.RelatedObjects:
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self.update_representation(element)
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def calculate_position(self):
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self.dummy = ifcopenshell.file(schema=self.file.schema)
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dummy_profile = self.dummy.add(self.profile)
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# We clear all radiuses so that we can calculate geometric centroid easily
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for i, attribute in enumerate(dummy_profile):
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name = dummy_profile.attribute_name(i)
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if "Radius" in name and name != "RoundingRadius":
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dummy_profile[i] = None
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dummy_solid = self.dummy.create_entity(
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"IfcExtrudedAreaSolid",
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**{
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"SweptArea": dummy_profile,
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"ExtrudedDirection": self.dummy.createIfcDirection((0.0, 0.0, 1.0)),
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"Depth": 1,
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}
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)
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self.settings_2d = ifcopenshell.geom.settings()
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self.settings_2d.set("dimensionality", ifcopenshell.ifcopenshell_wrapper.CURVES_SURFACES_AND_SOLIDS)
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shape = ifcopenshell.geom.create_shape(self.settings_2d, dummy_solid)
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# NOTE: points do not need unit conversion
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# as dummy file is inherently using project units.
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if self.cardinal_point == 1:
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return self.get_bottom_left(shape)
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elif self.cardinal_point == 2:
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return self.get_bottom_centre(shape)
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elif self.cardinal_point == 3:
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return self.get_bottom_right(shape)
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elif self.cardinal_point == 4:
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return self.get_mid_depth_left(shape)
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elif self.cardinal_point == 5:
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return self.get_mid_depth_centre(shape)
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elif self.cardinal_point == 6:
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return self.get_mid_depth_right(shape)
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elif self.cardinal_point == 7:
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return self.get_top_left(shape)
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elif self.cardinal_point == 8:
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return self.get_top_centre(shape)
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elif self.cardinal_point == 9:
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return self.get_top_right(shape)
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def get_bottom_left(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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width = ifcopenshell.util.shape.get_x(shape)
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height = ifcopenshell.util.shape.get_y(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((-width / 2, height / 2, 0.0)))
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def get_bottom_centre(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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height = ifcopenshell.util.shape.get_y(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((0.0, height / 2, 0.0)))
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def get_bottom_right(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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width = ifcopenshell.util.shape.get_x(shape)
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height = ifcopenshell.util.shape.get_y(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((width / 2, height / 2, 0.0)))
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def get_mid_depth_left(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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width = ifcopenshell.util.shape.get_x(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((-width / 2, 0.0, 0.0)))
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def get_mid_depth_centre(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((0.0, 0.0, 0.0)))
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def get_mid_depth_right(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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width = ifcopenshell.util.shape.get_x(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((width / 2, 0.0, 0.0)))
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def get_top_left(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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width = ifcopenshell.util.shape.get_x(shape)
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height = ifcopenshell.util.shape.get_y(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((-width / 2, -height / 2, 0.0)))
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def get_top_centre(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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height = ifcopenshell.util.shape.get_y(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((0.0, -height / 2, 0.0)))
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def get_top_right(self, shape: ShapeType) -> ifcopenshell.entity_instance:
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width = ifcopenshell.util.shape.get_x(shape)
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height = ifcopenshell.util.shape.get_y(shape)
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return self.file.createIfcAxis2Placement3D(self.file.createIfcCartesianPoint((width / 2, -height / 2, 0.0)))
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def update_representation(self, element: 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") and subelement.SweptArea == self.profile:
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self.update_swept_area_solid(subelement)
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def update_swept_area_solid(self, element: ifcopenshell.entity_instance) -> None:
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element.Position = self.position
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