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https://github.com/IfcOpenShell/IfcOpenShell.git
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Dion Moult
59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 Dion Moult <dion@thinkmoult.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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class Data:
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is_loaded = False
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map_conversion = {}
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projected_crs = {}
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true_north = {}
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@classmethod
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def purge(cls):
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cls.is_loaded = False
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cls.map_conversion = {}
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cls.projected_crs = {}
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cls.true_north = None
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@classmethod
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def load(cls, file):
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if not file:
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return
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cls.map_conversion = {}
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cls.projected_crs = {}
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cls.true_north = {}
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if file.schema == "IFC2X3":
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return
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for context in file.by_type("IfcGeometricRepresentationContext", include_subtypes=False):
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if not context.HasCoordinateOperation:
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continue
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map_conversion = context.HasCoordinateOperation[0]
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cls.map_conversion = map_conversion.get_info()
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cls.map_conversion["SourceCRS"] = cls.map_conversion["SourceCRS"].id()
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cls.map_conversion["TargetCRS"] = cls.map_conversion["TargetCRS"].id()
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cls.projected_crs = map_conversion.TargetCRS.get_info()
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if cls.projected_crs["MapUnit"]:
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cls.projected_crs["MapUnit"] = map_conversion.TargetCRS.MapUnit.get_info()
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break
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for context in file.by_type("IfcGeometricRepresentationContext", include_subtypes=False):
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if not context.TrueNorth:
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continue
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cls.true_north = context.TrueNorth.DirectionRatios
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break
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cls.is_loaded = True
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