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https://github.com/IfcOpenShell/IfcOpenShell.git
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64 lines
2.6 KiB
Python
64 lines
2.6 KiB
Python
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# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2022 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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import ifcopenshell.util.unit
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class Usecase:
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def __init__(self, file, **settings):
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self.file = file
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self.settings = {
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"representation": None,
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"operator": "DIFFERENCE",
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# The XY plane is the clipping boundary and +Z is removed.
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"matrix": None, # A matrix to define a clipping half space solid.
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}
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for key, value in settings.items():
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self.settings[key] = value
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def execute(self):
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self.settings["unit_scale"] = ifcopenshell.util.unit.calculate_unit_scale(self.file)
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self.settings["representation"].RepresentationType = "Clipping"
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result = self.create_half_space_solid()
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items = []
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for item in self.settings["representation"].Items:
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items.append(self.file.createIfcBooleanResult(self.settings["operator"], item, result))
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self.settings["representation"].Items = items
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def create_half_space_solid(self):
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clipping = self.settings["matrix"]
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return self.file.createIfcHalfSpaceSolid(
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self.file.createIfcPlane(
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self.file.createIfcAxis2Placement3D(
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self.file.createIfcCartesianPoint(
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(
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self.convert_si_to_unit(clipping[0][3]),
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self.convert_si_to_unit(clipping[1][3]),
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self.convert_si_to_unit(clipping[2][3]),
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)
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),
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self.file.createIfcDirection((clipping[0][2], clipping[1][2], clipping[2][2])),
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self.file.createIfcDirection((clipping[0][0], clipping[1][0], clipping[2][0])),
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)
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),
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False,
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)
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def convert_si_to_unit(self, co):
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return co / self.settings["unit_scale"]
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