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Support element decomposition through IfcRelAggregates

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This commit is contained in:
Dion Moult
2019-09-03 20:52:22 +10:00
parent a7286e5527
commit b1dda0a679
1 changed files with 86 additions and 42 deletions
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export.py
+86 -42
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@@ -18,27 +18,43 @@ class IfcParser():
with open(self.schema_dir + 'ifc_types_IFC4.json') as f:
self.type_map = json.load(f)
self.already_parsed_collections = []
self.selected_products = []
self.selected_types = []
self.psets = []
self.aggregates = {}
self.spatial_structure_elements = []
self.spatial_structure_elements_tree = []
self.rel_contained_in_spatial_structure = {}
self.rel_defines_by_type = {}
self.rel_aggregates = {}
self.representations = []
self.type_products = []
self.context = {}
self.products = []
def parse(self):
self.sort_selected_into_products_and_types()
self.sort_into_products_and_types(bpy.context.selected_objects)
self.psets = self.get_psets()
self.spatial_structure_elements = self.get_spatial_structure_elements()
self.representations = self.get_representations()
self.type_products = self.get_type_products()
self.collection_name_filter = []
self.get_products()
self.context = self.get_context()
self.spatial_structure_elements_tree = self.get_spatial_structure_elements_tree(
self.context['raw'].children, self.collection_name_filter)
def get_object_attributes(self, object):
attributes = { 'Name': self.get_ifc_name(object.name) }
attributes.update({ key[3:]: object[key] for key in object.keys() if key[0:3] == 'Ifc'})
return attributes
def get_products(self):
index = 0
for object in self.selected_products:
self.products.append(self.get_product(object, index))
@@ -56,15 +72,6 @@ class IfcParser():
created_instances.append((o[0], location))
instance_objects.extend(created_instances)
self.context = self.get_context()
self.spatial_structure_elements_tree = self.get_spatial_structure_elements_tree(
self.context['raw'].children, self.collection_name_filter)
def get_object_attributes(self, object):
attributes = { 'Name': self.get_ifc_name(object.name) }
attributes.update({ key[3:]: object[key] for key in object.keys() if key[0:3] == 'Ifc'})
return attributes
def get_product(self, object, index, attribute_override={}):
product = {
'ifc': None,
@@ -74,12 +81,17 @@ class IfcParser():
'forward_axis': object.matrix_world.to_quaternion() @ Vector((1, 0, 0)),
'class': self.get_ifc_class(object.name),
'relating_structure': None,
'representation': self.get_representation_reference(object.data.name),
'representation': self.get_representation_reference_from_object(object),
'attributes': self.get_object_attributes(object)
}
product.update(attribute_override)
for collection in product['raw'].users_collection:
self.parse_product_spatial_structure(product, index, collection)
self.parse_product_collection(product, index, collection)
if object.instance_type == 'COLLECTION' \
and self.is_a_rel_aggregates(self.get_ifc_class(object.instance_collection.name)):
self.rel_aggregates[index] = object.instance_collection.name
if object.parent \
and self.is_a_type(self.get_ifc_class(object.parent.name)):
@@ -87,14 +99,17 @@ class IfcParser():
self.rel_defines_by_type.setdefault(reference, []).append(index)
return product
def parse_product_spatial_structure(self, product, index, collection):
if self.is_a_spatial_structure_element(self.get_ifc_class(collection.name)):
reference = self.get_spatial_structure_element_reference(collection.name)
self.rel_contained_in_spatial_structure.setdefault(reference, []).append(index)
product['relating_structure'] = reference
self.collection_name_filter.append(collection.name)
else:
self.parse_product_spatial_structure(product, index, self.get_parent_collection(collection))
def parse_product_collection(self, product, index, collection):
class_name = self.get_ifc_class(collection.name)
if self.is_a_spatial_structure_element(class_name):
reference = self.get_spatial_structure_element_reference(collection.name)
self.rel_contained_in_spatial_structure.setdefault(reference, []).append(index)
product['relating_structure'] = reference
self.collection_name_filter.append(collection.name)
elif self.is_a_rel_aggregates(class_name):
self.aggregates.setdefault(collection.name, []).append(index)
else:
self.parse_product_collection(product, index, self.get_parent_collection(collection))
def get_parent_collection(self, child_collection):
for parent_collection in bpy.data.collections:
@@ -117,12 +132,16 @@ class IfcParser():
instances.append(array)
return instances
def sort_selected_into_products_and_types(self):
for object in bpy.context.selected_objects:
def sort_into_products_and_types(self, objects_to_sort):
for object in objects_to_sort:
if self.is_object_in_types_collection(object):
self.selected_types.append(object)
else:
self.selected_products.append(object)
if object.instance_type == 'COLLECTION' \
and object.instance_collection.name not in self.already_parsed_collections:
self.already_parsed_collections.append(object.instance_collection.name)
self.sort_into_products_and_types(object.instance_collection.objects)
def get_psets(self):
psets = []
@@ -168,6 +187,8 @@ class IfcParser():
def get_representations(self):
representations = {}
for object in self.selected_products + self.selected_types:
if not object.data:
continue
representations[object.data.name] = object.data
results = []
for name, value in representations.items():
@@ -188,10 +209,15 @@ class IfcParser():
'up_axis': object.matrix_world.to_quaternion() @ Vector((0, 0, 1)),
'forward_axis': object.matrix_world.to_quaternion() @ Vector((1, 0, 0)),
'class': self.get_ifc_class(object.name),
'representation': self.get_representation_reference(object.data.name),
'representation': self.get_representation_reference_from_object(object),
'attributes': self.get_object_attributes(object)
} for object in self.selected_types ]
def get_representation_reference_from_object(self, object):
if not object.data:
return None
return self.get_representation_reference(object.data.name)
def get_representation_reference(self, name):
return [ r['attributes']['Name'] for r in self.representations ].index(name)
@@ -231,7 +257,11 @@ class IfcParser():
# We assume that any collection we can't identify is a spatial structure
return class_name[0:3] == 'Ifc' \
and not self.is_a_context(class_name) \
and not self.is_a_types_collection(class_name)
and not self.is_a_types_collection(class_name) \
and not self.is_a_rel_aggregates(class_name)
def is_a_rel_aggregates(self, class_name):
return class_name == 'IfcRelAggregates'
def is_a_context(self, class_name):
return class_name in ['IfcProject', 'IfcProjectLibrary']
@@ -259,6 +289,7 @@ class IfcExporter():
self.create_type_products()
self.create_spatial_structure_elements(self.ifc_parser.spatial_structure_elements_tree)
self.create_products()
self.relate_objects_to_objects()
self.relate_elements_to_spatial_structures()
self.relate_objects_to_types()
self.file.write(self.output_file)
@@ -337,6 +368,14 @@ class IfcExporter():
except RuntimeError as e:
print('The type product "{}/{}" could not be created: {}'.format(product['class'], product['attributes']['Name'], e.args))
def relate_objects_to_objects(self):
for relating_object, related_objects in self.ifc_parser.rel_aggregates.items():
relating_object = self.ifc_parser.products[relating_object]
related_objects = [ self.ifc_parser.products[o]['ifc'] for o in self.ifc_parser.aggregates[related_objects] ]
self.file.createIfcRelAggregates(
ifcopenshell.guid.new(), self.owner_history, relating_object['attributes']['Name'], None,
relating_object['ifc'], related_objects)
def create_spatial_structure_elements(self, element_tree, relating_object=None):
if relating_object == None:
relating_object = self.ifc_parser.context['ifc']
@@ -365,27 +404,32 @@ class IfcExporter():
def create_products(self):
for product in self.ifc_parser.products:
try:
placement_rel_to = self.ifc_parser.spatial_structure_elements[product['relating_structure']]['ifc'].ObjectPlacement
except Exception as e:
print('The product "{}/{}" could not be placed on a spatial structure {}'.format(product['class'], product['attributes']['Name'], e.args))
continue
placement = self.file.createIfcLocalPlacement(placement_rel_to,
self.create_ifc_axis_2_placement_3d(product['location'],
product['up_axis'],
product['forward_axis']))
shape = self.file.createIfcProductDefinitionShape(
None, None,
[self.ifc_parser.representations[product['representation']]['ifc']])
product['attributes'].update({
'GlobalId': ifcopenshell.guid.new(), # TODO: unhardcode
'OwnerHistory': self.owner_history, # TODO: unhardcode
'ObjectPlacement': placement,
'Representation': shape
})
self.create_product(product)
def create_product(self, product):
if product['relating_structure']:
placement_rel_to = self.ifc_parser.spatial_structure_elements[product['relating_structure']]['ifc'].ObjectPlacement
else:
placement_rel_to = None
placement = self.file.createIfcLocalPlacement(placement_rel_to,
self.create_ifc_axis_2_placement_3d(product['location'],
product['up_axis'],
product['forward_axis']))
try:
shape = self.file.createIfcProductDefinitionShape(None, None,
[self.ifc_parser.representations[product['representation']]['ifc']])
except:
shape = None
product['attributes'].update({
'GlobalId': ifcopenshell.guid.new(), # TODO: unhardcode
'OwnerHistory': self.owner_history, # TODO: unhardcode
'ObjectPlacement': placement,
'Representation': shape
})
try:
product['ifc'] = self.file.create_entity(product['class'], **product['attributes'])
except RuntimeError as e: