mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-09 09:21:46 +00:00
Richard Brice
04e07db0a3
* Start of the official alignment API * Import alignment into bonsai model using CSV file
102 lines
4.2 KiB
Python
102 lines
4.2 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2025 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 ifcopenshell
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import ifcopenshell.api.alignment
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import ifcopenshell.api.nest
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import ifcopenshell.geom
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import ifcopenshell.ifcopenshell_wrapper as ifcopenshell_wrapper
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import numpy as np
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from ifcopenshell import entity_instance
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def add_zero_length_segment(file: ifcopenshell.file, entity: entity_instance) -> None:
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"""
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Adds a zero length segment to the end of entity.
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:param entity: An IfcAlignmentHorizontal, IfcAlignmentVertical, IfcAlignmentCant or IfcCompositeCurve (or subtype)
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:return: None
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"""
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expected_types = [
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"IfcAlignmentHorizontal",
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"IfcAlignmentVertical",
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"IfcAlignmentCant",
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"IfcCompositeCurve",
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"IfcGradientCurve",
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"IfcSegmentedReferenceCurve",
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]
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if not entity.is_a() in expected_types:
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raise TypeError(
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f"Expected entity type to be one of {[_ for _ in expected_types]}, instead received '{entity.is_a()}"
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)
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if entity.is_a("IfcCompositeCurve"):
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last_segment = entity.Segments[-1]
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settings = ifcopenshell.geom.settings()
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segment_fn = ifcopenshell_wrapper.map_shape(settings, last_segment.wrapped_data)
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segment_evaluator = ifcopenshell_wrapper.function_item_evaluator(settings, segment_fn)
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e = segment_evaluator.evaluate(segment_fn.end())
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end = np.array(e)
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x = float(end[0, 3])
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y = float(end[1, 3])
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dx = float(end[0, 0])
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dy = float(end[1, 0])
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parent_curve = file.createIfcLine(
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Pnt=file.createIfcCartesianPoint(Coordinates=((0.0, 0.0))),
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Dir=file.createIfcVector(
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Orientation=file.createIfcDirection(DirectionRatios=((1.0, 0.0))),
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Magnitude=1.0,
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),
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)
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curve_segment = file.createIfcCurveSegment(
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Transition="DISCONTINUOUS",
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Placement=file.createIfcAxis2Placement2D(
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Location=file.createIfcCartesianPoint(Coordinates=((x, y))),
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RefDirection=file.createIfcDirection((dx, dy)),
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),
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SegmentStart=file.createIfcLengthMeasure(0.0),
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SegmentLength=file.createIfcLengthMeasure(0.0),
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ParentCurve=parent_curve,
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)
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ifcopenshell.api.alignment.add_segment_to_curve(file, curve_segment, entity)
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else:
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for rel in entity.IsNestedBy:
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if 0 < len(rel.RelatedObjects):
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last_segment = rel.RelatedObjects[-1]
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if last_segment.is_a("IfcAlignmentSegment"):
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design_parameters = file.createIfcAlignmentHorizontalSegment(
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StartPoint=file.createIfcCartesianPoint(
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(0.0, 0.0)
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), # this is a little problematic. need to know the end point and tangent
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StartDirection=0.0, # of the previous segment, which requires geometry mapping
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SegmentLength=0.0,
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PredefinedType="LINE",
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)
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segment = file.createIfcAlignmentSegment(
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GlobalId=ifcopenshell.guid.new(), DesignParameters=design_parameters
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)
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ifcopenshell.api.nest.assign_object(
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file,
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related_objects=[
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segment,
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],
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relating_object=entity,
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)
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break
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