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Merge pull request #4125 from Krande/fix/convert-units

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Proposal for updating IfcPatch ConvertLengthUnit.py for compatibility with boost>=1.82
This commit is contained in:
Kristoffer Andersen
2023-12-19 06:43:01 +01:00
committed by GitHub
parent 6b7eec0db6 593fca7c3d
commit 96db699ad2
6 changed files with 588 additions and 167 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/ifcopenshell-python/ifcopenshell/util/unit.py
+88 -11
View File
@@ -16,8 +16,12 @@
# You should have received a copy of the GNU Lesser General Public License
# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
from math import pi
from fractions import Fraction
from math import pi
from typing import Tuple, Iterable, Any
import ifcopenshell
import ifcopenshell.api
prefixes = {
"EXA": 1e18,
@@ -214,12 +218,10 @@ si_conversions = {
"fahrenheit": 1.8,
}
si_offsets = {
"fahrenheit": -459.67,
}
imperial_types = {
"thou": "LENGTHUNIT",
"inch": "LENGTHUNIT",
@@ -260,7 +262,6 @@ imperial_types = {
"fahrenheit": "THERMODYNAMICTEMPERATUREUNIT",
}
prefix_symbols = {
"EXA": "E",
"PETA": "P",
@@ -558,13 +559,13 @@ def calculate_unit_scale(ifc_file):
def format_length(
value,
precision,
decimal_places=2,
suppress_zero_inches=True,
unit_system="imperial",
input_unit="foot",
output_unit="foot",
value,
precision,
decimal_places=2,
suppress_zero_inches=True,
unit_system="imperial",
input_unit="foot",
output_unit="foot",
):
"""Formats a length for readability and imperial formatting
@@ -624,3 +625,79 @@ def format_length(
elif unit_system == "metric":
rounded_val = round(value / precision) * precision
return f"{rounded_val:.{decimal_places}f}"
def is_attr_type(
content_type: ifcopenshell.ifcopenshell_wrapper.named_type | ifcopenshell.ifcopenshell_wrapper.type_declaration,
ifc_unit_type_name: str) -> ifcopenshell.ifcopenshell_wrapper.type_declaration | None:
cur_decl = content_type
while hasattr(cur_decl, "declared_type") is True:
cur_decl = cur_decl.declared_type()
if hasattr(cur_decl, "name") is False:
continue
if cur_decl.name() == ifc_unit_type_name:
return cur_decl
if isinstance(cur_decl, ifcopenshell.ifcopenshell_wrapper.aggregation_type):
res = cur_decl.type_of_element()
cur_decl = res.declared_type()
if hasattr(cur_decl, "name") and cur_decl.name() == ifc_unit_type_name:
return cur_decl
while hasattr(cur_decl, "declared_type") is True:
cur_decl = cur_decl.declared_type()
if hasattr(cur_decl, "name") is False:
continue
if cur_decl.name() == ifc_unit_type_name:
return cur_decl
return None
def iter_element_and_attributes_per_type(ifc_file: ifcopenshell.file, attr_type_name: str) -> Iterable[
Tuple[ifcopenshell.entity_instance, ifcopenshell.ifcopenshell_wrapper.attribute, Any, str]]:
schema = ifcopenshell.ifcopenshell_wrapper.schema_by_name(ifc_file.schema)
for element in ifc_file:
entity = schema.declaration_by_name(element.is_a())
attrs = entity.all_attributes()
for i, (attr, val, is_derived) in enumerate(zip(attrs, list(element), entity.derived())):
if is_derived:
continue
# Get all methods and attributes of the element
attr_type = attr.type_of_attribute()
base_type = is_attr_type(attr_type, attr_type_name)
if base_type is None:
continue
if val is None:
continue
yield element, attr, val
def convert_file_length_units(ifc_file: ifcopenshell.file, target_units: str) -> ifcopenshell.file:
"""Converts all units in an IFC file to the specified target units. Returns a new file."""
prefix = "MILLI" if target_units == "MILLIMETERS" else None
# Copy all elements from the original file to the patched file
file_patched = ifcopenshell.file.from_string(ifc_file.wrapped_data.to_string())
unit_assignment = ifcopenshell.util.unit.get_unit_assignment(file_patched)
old_length = [u for u in unit_assignment.Units if getattr(u, "UnitType", None) == "LENGTHUNIT"][0]
new_length = ifcopenshell.api.run("unit.add_si_unit", file_patched, unit_type="LENGTHUNIT", prefix=prefix)
# Traverse all elements and their nested attributes in the file and convert them
for element, attr, val in iter_element_and_attributes_per_type(file_patched, "IfcLengthMeasure"):
if isinstance(val, tuple):
new_value = [ifcopenshell.util.unit.convert_unit(v, old_length, new_length) for v in val]
setattr(element, attr.name(), tuple(new_value))
else:
new_value = ifcopenshell.util.unit.convert_unit(val, old_length, new_length)
setattr(element, attr.name(), new_value)
file_patched.remove(old_length)
unit_assignment.Units = tuple([new_length, *unit_assignment.Units])
return file_patched
src/ifcopenshell-python/test/fixtures/units/beam-standard-case.ifc
Vendored
+426
View File
@@ -0,0 +1,426 @@
ISO-10303-21;
HEADER;
FILE_DESCRIPTION((''),'2;1');
FILE_NAME('','2019-03-20T15:56:44',(''),(''),'BuildingSmart IfcKit by Constructivity','IfcDoc 12.0.0.0','');
FILE_SCHEMA(('IFC4x1'));
ENDSEC;
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ENDSEC;
END-ISO-10303-21;
src/ifcopenshell-python/test/util/test_unit_conversion.py
+49
View File
@@ -0,0 +1,49 @@
# IfcOpenShell - IFC toolkit and geometry engine
# Copyright (C) 2023 Dion Moult <dion@thinkmoult.com>
#
# This file is part of IfcOpenShell.
#
# IfcOpenShell is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# IfcOpenShell is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
import pathlib
import pytest
import ifcopenshell.util.unit
UNITS_FIXTURE_DIR = pathlib.Path(__file__).parent.parent / "fixtures" / "units"
@pytest.mark.parametrize("ifc_file", UNITS_FIXTURE_DIR.glob("*.ifc"))
def test_file_units_length_convert(ifc_file):
f = ifcopenshell.open(ifc_file)
project_unit = ifcopenshell.util.unit.get_project_unit(f, "LENGTHUNIT")
if project_unit.Prefix == "MILLI":
target_units = "METERS"
scale = 0.001
else:
target_units = "MILLIMETERS"
scale = 1000
new_f = ifcopenshell.util.unit.convert_file_length_units(f, target_units)
for element, attr, val in ifcopenshell.util.unit.iter_element_and_attributes_per_type(new_f, "IfcLengthMeasure"):
elem_id = element.id()
original_element = f.by_id(elem_id)
original_val = getattr(original_element, attr.name())
if isinstance(original_val, tuple):
# assert element is equal to original element times scale
assert val == tuple([v * scale for v in original_val])
else:
# assert element is equal to original element times scale
assert val == original_val * scale