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ifccityjson: updated georeferencing & added option to split IFC files based on Level of Detail

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This commit is contained in:
LaurensJN
2021-08-17 16:37:40 +02:00
parent fb1c340664
commit 4b7058e22e
1 changed files with 54 additions and 12 deletions
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src/ifccityjson/cityjson2ifc.py
+54 -12
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@@ -20,6 +20,7 @@ import ifcopenshell
import ifcopenshell.api
from geometry import GeometryIO
from datetime import datetime
import os
JSON_TO_IFC = {
"Building": ["IfcBuilding"],
@@ -75,7 +76,7 @@ class Cityjson2ifc:
self.configuration()
def configuration(self, file_destination="output.ifc", name_attribute=None, split=True):
self.properties["file_destination"] = file_destination
self.properties["file_destination"], self.properties["file_extension"] = os.path.splitext(file_destination)
self.properties["name_attribute"] = name_attribute
self.properties["split"] = split
@@ -88,7 +89,10 @@ class Cityjson2ifc:
scale=self.properties["local_scale"])
# self.build_vertices()
self.create_IFC_classes()
self.write_file()
if self.properties["split"]:
self.write_files()
else:
self.write_file()
def create_metadata(self):
# Georeferencing
@@ -107,13 +111,13 @@ class Cityjson2ifc:
if epsg:
# Meter is assumed as unit for now
unit = self.IFC_model.createIfcSIUnit(None, "LENGTHUNIT", None, "METRE")
crs = self.IFC_model.create_entity("IfcProjectedCrs", Name=f"epsg:{epsg}")
self.IFC_model.create_entity("IfcMapConversion", self.IFC_representation_context,
**self.properties["local_translation"])
self.properties["local_translation"]["TargetCRS"] = self.IFC_model.create_entity("IfcProjectedCrs", Name=f"epsg:{epsg}")
self.properties["local_translation"]["SourceCRS"] = self.IFC_representation_context
self.IFC_model.create_entity("IfcMapConversion", **self.properties["local_translation"])
def create_new_file(self):
self.IFC_model = ifcopenshell.api.run("project.create_file")
self.IFC_project = ifcopenshell.api.run("root.create_entity", self.IFC_model, **{"ifc_class": "IfcProject"})
self.IFC_project = ifcopenshell.api.run("root.create_entity", self.IFC_model, **{"ifc_class": "IfcProject", "name": "My Project"})
ifcopenshell.api.run("unit.assign_unit", self.IFC_model, length={"is_metric": True, "raw": "METERS"})
self.properties["owner_history"] = self.create_owner_history()
self.IFC_representation_context = ifcopenshell.api.run("context.add_context", self.IFC_model,
@@ -139,6 +143,10 @@ class Cityjson2ifc:
self.IFC_site = ifcopenshell.api.run("root.create_entity", self.IFC_model,
**{"ifc_class": "IfcSite",
"name": "My Site"})
self.IFC_model.create_entity("IfcRelAggregates",
**{"GlobalId": ifcopenshell.guid.new(),
"RelatedObjects": [self.IFC_site],
"RelatingObject": self.IFC_project})
def create_owner_history(self):
actor = self.IFC_model.createIfcActorRole("ENGINEER", None, None)
@@ -157,7 +165,31 @@ class Cityjson2ifc:
return ownerHistory
def write_file(self):
self.IFC_model.write(self.properties["file_destination"])
file = self.properties["file_destination"] + self.properties["file_extension"]
self.IFC_model.write(file)
def write_files(self):
for lod, IFC_representation_sub_context in self.IFC_representation_sub_contexts.items():
sub_context_id = IFC_representation_sub_context.id()
# TODO this method makes a copy of the IFC_model by writing it and importing it,
# TODO but maybe there is a better method.
file = self.properties["file_destination"] + lod + self.properties["file_extension"]
self.IFC_model.write(file)
IFC_copied_model = ifcopenshell.open(file)
IFC_copied_model_sub_contexts = IFC_copied_model.by_type('IfcGeometricRepresentationSubContext')
for sub_context in IFC_copied_model_sub_contexts:
if sub_context.id() == sub_context_id:
continue
else:
elements = IFC_copied_model.get_inverse(sub_context)
for element in elements:
IFC_copied_model.remove(element)
IFC_copied_model.remove(sub_context)
IFC_copied_model.write(file)
del IFC_copied_model
def create_IFC_classes(self):
parents_children_relations = {"IfcSite": {'Parent': self.IFC_site, 'Children': []}}
@@ -223,14 +255,21 @@ class Cityjson2ifc:
parents_children_relations[obj_id]['Parent'] = IFC_object
if IFC_semantic_surface_children:
self.IFC_model.create_entity("IfcRelAggregates",
self.IFC_model.create_entity("IfcRelContainedInSpatialStructure",
**{"GlobalId": ifcopenshell.guid.new(),
"RelatedObjects": IFC_semantic_surface_children,
"RelatingObject": IFC_object})
"RelatedElements": IFC_semantic_surface_children,
"RelatingStructure": IFC_object})
self.create_property_set(obj.attributes, IFC_object)
for parent_children in parents_children_relations.values():
for parent, parent_children in parents_children_relations.items():
if parent == "IfcSite":
self.IFC_model.create_entity("IfcRelAggregates",
**{"GlobalId": ifcopenshell.guid.new(),
"RelatedObjects": parent_children['Children'],
"RelatingObject": parent_children['Parent']})
continue
self.IFC_model.create_entity("IfcRelContainedInSpatialStructure",
**{"GlobalId": ifcopenshell.guid.new(),
"RelatedElements": parent_children['Children'],
@@ -248,8 +287,11 @@ class Cityjson2ifc:
# CREATE ENTITY
surface_geometry = self.geometry.create_IFC_surface(self.IFC_model, geometry, surface_id)
if surface_geometry:
child_data["Representation"] = self.create_IFC_shape_representation(surface_geometry, 'brep', lod)
IFC_shape_representation =self.create_IFC_shape_representation(surface_geometry, 'brep', lod)
child_data["Representation"] = self.IFC_model.create_entity("IfcProductDefinitionShape",
Representations=[IFC_shape_representation])
IFC_semantic_surface_children.append(self.IFC_model.create_entity(IFC_child_class, **child_data))
return IFC_semantic_surface_children
def create_IFC_shape_representation(self, IFC_geometry, shape_representation_type, lod):