mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-09 17:31:45 +00:00
Andrej730
69 lines
2.6 KiB
Python
69 lines
2.6 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 Thomas Krijnen <thomas@aecgeeks.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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import math
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import ifcopenshell
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import ifcopenshell.util.unit
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def station_as_string(file: ifcopenshell.file, sta: float):
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"""
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Returns a stringized version of a station. Example 100.0 is 1+00.00 as a stationing string.
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If the project units are SI-based, the string is in the format xxx+yyy.zzz
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If the project units are Emperial-based, the string is in the format xx+yy.zz
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:param station: the station to be stringized
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:return: stringized station
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"""
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unit_type = ifcopenshell.util.unit.get_project_unit(file, "LENGTHUNIT")
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if unit_type.is_a("IfcConversionBasedUnit"):
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station = ifcopenshell.util.unit.convert(
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sta, from_unit=unit_type.Name, from_prefix=None, to_unit="foot", to_prefix=None
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)
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plus_seperator = 2
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precision = 2
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else:
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station = ifcopenshell.util.unit.convert(
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sta, from_unit=unit_type.Name, from_prefix=unit_type.Prefix, to_unit="meter", to_prefix=None
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)
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plus_seperator = 3
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precision = 3
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value = math.fabs(station)
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shifter = math.pow(10.0, plus_seperator)
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v1 = math.floor(value / shifter)
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v2 = value - v1 * shifter
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# Check to make sure that v2 is not basically the same as shifter
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# If station = 69500.00000, we sometimes get 694+100.00 instead of 695+00.00
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if math.isclose(v2 - shifter, 0.0, abs_tol=5.0 * math.pow(10.0, -(precision + 1))):
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v2 = 0.0
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v1 += 1
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v1 = -1 * v1 if station < 0 else v1
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station_string = "{:d}+{:0{}.{}f}".format(v1, v2, plus_seperator + precision + 1, precision)
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# special case when v1 is 0 and station is negative, the string above doesn't get the leading
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# negative sign. this snippet fixes that
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if v1 == 0 and station < 0:
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station_string = "-" + station_string
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return station_string
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