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importifcopenshell.api.rootimportifcopenshell.api.unitimportifcopenshell.api.contextimportifcopenshell.api.projectimportifcopenshell.api.geometryimportnumpyasnp# Let's create a new project using millimeters with a single furniture element at the origin.model=ifcopenshell.api.project.create_file(version="IFC4X3")
project=ifcopenshell.api.root.create_entity(model, ifc_class="IfcProject", name="FloorPlanner export")
# add unitsifcopenshell.api.unit.assign_unit(
model,
length={"is_metric": True, "raw": "METERS"},
area={"is_metric": True, "raw": "METERS"},
volume={"is_metric": True, "raw": "METERS"},
)
# We want our representation to be the 3D body of the element.# This representation context is only created once per project.# You must reuse the same body context every time you create a new representation.model3d=ifcopenshell.api.context.add_context(model, context_type="Model")
body=ifcopenshell.api.context.add_context(model,
context_type="Model", context_identifier="Body", target_view="MODEL_VIEW", parent=model3d)
# add site, building, storeysite=ifcopenshell.api.root.create_entity(model, ifc_class="IfcSite", name="My Site")
building=ifcopenshell.api.root.create_entity(model, ifc_class="IfcBuilding", name="My Building")
storey=ifcopenshell.api.root.create_entity(model, ifc_class="IfcBuildingStorey", name="My Floor")
ifcopenshell.api.aggregate.assign_object(model, relating_object=project, products=[site])
ifcopenshell.api.aggregate.assign_object(model, relating_object=site, products=[building])
ifcopenshell.api.aggregate.assign_object(model, relating_object=building, products=[storey])
I added the site, building and storey parts myself.
Why is this not mentioned in the example?
I can recreate the part with the mesh representation:
# Create our element with an object placement.element=ifcopenshell.api.root.create_entity(model, ifc_class="IfcFurniture")
ifcopenshell.api.geometry.edit_object_placement(model, product=element, matrix=np.eye(4))
vertices= [[(0.,0.,0.), (0.,2.,0.), (2.,2.,0.), (2.,0.,0.), (1.,1.,1.)]]
faces= [[(0,1,2,3), (0,4,1), (1,4,2), (2,4,3), (3,4,0)]]
representation=ifcopenshell.api.geometry.add_mesh_representation(model, context=body, vertices=vertices, faces=faces)
# extremely important!ifcopenshell.api.spatial.assign_container(model, products=[element], relating_structure=storey)
# Assign our new body representation back to our elementifcopenshell.api.geometry.assign_representation(model, product=element, representation=representation)
# write file:model.write("./representation.ifc")
Here I have my second question:
Why is the assign_container part left out in the tutorial?
Without it the mesh representation does not get displayed when I open the ifc file in bonsai.
According to this "All physical IFC model elements must be part of a hierarchical tree ..."
Now trying to create an I-Beam, I copied this part from the example:
# I-shapes are typically used in hot-rolled or welded steel. FilletRadius onwards is optional.profile=model.create_entity("IfcIShapeProfileDef", ProfileName="I-EXAMPLE", ProfileType="AREA",
OverallWidth=100, OverallDepth=200, WebThickness=10, FlangeThickness=15, FilletRadius=10)
profile_context=ifcopenshell.api.context.add_context(model,
context_type="Model", context_identifier="Profile", target_view="MODEL_VIEW", parent=model3d)
# A profile-based representation, 1 meter longrepresentation=ifcopenshell.api.geometry.add_profile_representation(model, context=body, profile=profile, depth=1)
Using:
ifcopenshell.api.spatial.assign_container(model, products=[profile], relating_structure=storey)
# Assign our new body representation back to our elementifcopenshell.api.geometry.assign_representation(model, product=representation, representation=representation)
# write file:model.write("./beam.ifc")
gives me the following error message: AttributeError: entity instance of type 'IFC4X3_ADD2.IfcIShapeProfileDef' has no attribute 'ContainedInStructure'. However when I do not use assign_container nothing gets displayed in bonsai.
So there must be some part here that is not in the example or that I must have overlooked.
It would be great if someone could point that out to me.
Thanks
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Hi,
I am fairly new to this and I don't understand the Profile-based Representations.
I followed the documentation and got this code:
I added the site, building and storey parts myself.
Why is this not mentioned in the example?
I can recreate the part with the mesh representation:
Here I have my second question:
Why is the
assign_containerpart left out in the tutorial?Without it the mesh representation does not get displayed when I open the ifc file in bonsai.
According to this "All physical IFC model elements must be part of a hierarchical tree ..."
Now trying to create an I-Beam, I copied this part from the example:
Using:
gives me the following error message:
AttributeError: entity instance of type 'IFC4X3_ADD2.IfcIShapeProfileDef' has no attribute 'ContainedInStructure'. However when I do not useassign_containernothing gets displayed in bonsai.So there must be some part here that is not in the example or that I must have overlooked.
It would be great if someone could point that out to me.
Thanks
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