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Alignments can now be created with or without geometric representations

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This commit is contained in:
Richard Brice
2025-08-25 16:05:47 -07:00
parent 8903d6a85c
commit 9331e89d15
6 changed files with 248 additions and 169 deletions
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src/ifcopenshell-python/ifcopenshell/api/alignment/create_layout_segment.py
+26 -22
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@@ -23,20 +23,21 @@ from ifcopenshell import entity_instance
import math
from ifcopenshell import ifcopenshell_wrapper
import numpy as np
from typing import Union
from ifcopenshell.api.alignment._add_segment_to_layout import _add_segment_to_layout
def create_layout_segment(
file: ifcopenshell.file, layout: entity_instance, design_parameters: entity_instance
) -> np.array:
) -> Union[np.array, None]:
"""
Creates a new IfcAlignmentSegment using the IfcAlignmentParameterSegment design parameters.
The new segment is appended to the layout alignment and the corresponding IfcCurveSegment is created in the geometric representation
The new segment is appended to the layout alignment and the corresponding IfcCurveSegment is created in the geometric representation if it exists.
:param layout: The layout to receive the new layout segment. This parameter is expected to be IfcAlignmentHorizontal, IfcAlignmentVertical or IfcAlignmentCant
:param design_parameters: The parameters defining the segment. Expected to be the appropreate subclass of IfcAlignmentParameterSegment
:return: 4x4 matrix at end of segment as np.array intended to be used as the start point geometry for the next segment.
:return: 4x4 matrix at end of segment as np.array intended to be used as the start point geometry for the next segment or None if there is the geometric representation is not defined.
"""
expected_types = ["IfcAlignmentHorizontal", "IfcAlignmentVertical", "IfcAlignmentCant"]
if not layout.is_a() in expected_types:
@@ -59,26 +60,29 @@ def create_layout_segment(
# returned and used when defining the next segment
alignment = ifcopenshell.api.alignment.get_alignment(layout)
curve = ifcopenshell.api.alignment.get_curve(alignment)
if curve:
if layout.is_a("IfcAlignmentHorizontal"):
if curve.is_a("IfcGradientCurve"):
curve = curve.BaseCurve
elif curve.is_a("IfcSegmentedReferenceCurve"):
curve = (
curve.BaseCurve.BaseCurve
) # layout is horizontal and curve is segmented ref ... we want the curve's base curve
elif layout.is_a("IfcAlignmentVertical"):
if curve.is_a("IfcSegmentedReferenceCurve"):
curve = curve.BaseCurve
if layout.is_a("IfcAlignmentHorizontal"):
if curve.is_a("IfcGradientCurve"):
curve = curve.BaseCurve
elif curve.is_a("IfcSegmentedReferenceCurve"):
curve = (
curve.BaseCurve.BaseCurve
) # layout is horizontal and curve is segmented ref ... we want the curve's base curve
elif layout.is_a("IfcAlignmentVertical"):
if curve.is_a("IfcSegmentedReferenceCurve"):
curve = curve.BaseCurve
# the new segment is two from the end... the end segment is zero length
curve_segment = curve.Segments[-2]
# the new segment is two from the end... the end segment is zero length
curve_segment = curve.Segments[-2]
settings = ifcopenshell.geom.settings()
settings = ifcopenshell.geom.settings()
segment_fn = ifcopenshell_wrapper.map_shape(settings, curve_segment.wrapped_data)
segment_evaluator = ifcopenshell_wrapper.function_item_evaluator(settings, segment_fn)
e = segment_evaluator.evaluate(segment_fn.end())
end = np.array(e)
segment_fn = ifcopenshell_wrapper.map_shape(settings, curve_segment.wrapped_data)
segment_evaluator = ifcopenshell_wrapper.function_item_evaluator(settings, segment_fn)
e = segment_evaluator.evaluate(segment_fn.end())
end = np.array(e)
return end
return end
else:
return None