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Added GCPnts_UniformDeflection to positions

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gumyr 2025-11-21 14:18:48 -05:00
parent bdad339e58
commit 7f6d44249b
1 changed files with 41 additions and 6 deletions
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47
src/build123d/topology/one_d.py
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@ -90,7 +90,11 @@ from OCP.BRepProj import BRepProj_Projection
from OCP.BRepTools import BRepTools, BRepTools_WireExplorer from OCP.BRepTools import BRepTools, BRepTools_WireExplorer
from OCP.GC import GC_MakeArcOfCircle, GC_MakeArcOfEllipse from OCP.GC import GC_MakeArcOfCircle, GC_MakeArcOfEllipse
from OCP.GccEnt import GccEnt_unqualified, GccEnt_Position from OCP.GccEnt import GccEnt_unqualified, GccEnt_Position
from OCP.GCPnts import GCPnts_AbscissaPoint from OCP.GCPnts import (
GCPnts_AbscissaPoint,
GCPnts_QuasiUniformDeflection,
GCPnts_UniformDeflection,
)
from OCP.Geom import ( from OCP.Geom import (
Geom_BezierCurve, Geom_BezierCurve,
Geom_BSplineCurve, Geom_BSplineCurve,
@ -116,6 +120,9 @@ from OCP.GeomAbs import (
GeomAbs_C0, GeomAbs_C0,
GeomAbs_C1, GeomAbs_C1,
GeomAbs_C2, GeomAbs_C2,
GeomAbs_C3,
GeomAbs_CN,
GeomAbs_C1,
GeomAbs_G1, GeomAbs_G1,
GeomAbs_G2, GeomAbs_G2,
GeomAbs_JoinType, GeomAbs_JoinType,
@ -1178,22 +1185,50 @@ class Mixin1D(Shape[TOPODS]):
def positions( def positions(
self, self,
distances: Iterable[float], distances: Iterable[float] | None = None,
position_mode: PositionMode = PositionMode.PARAMETER, position_mode: PositionMode = PositionMode.PARAMETER,
deflection: float | None = None,
) -> list[Vector]: ) -> list[Vector]:
"""Positions along curve """Positions along curve
Generate positions along the underlying curve Generate positions along the underlying curve
Args: Args:
distances (Iterable[float]): distance or parameter values distances (Iterable[float] | None, optional): distance or parameter values.
position_mode (PositionMode, optional): position calculation mode. Defaults to None.
Defaults to PositionMode.PARAMETER. position_mode (PositionMode, optional): position calculation mode only applies
when using distances. Defaults to PositionMode.PARAMETER.
deflection (float | None, optional): maximum deflection between the curve and
the polygon that results from the computed points. Defaults to None.
Returns: Returns:
list[Vector]: positions along curve list[Vector]: positions along curve
""" """
return [self.position_at(d, position_mode) for d in distances] if deflection is not None:
curve: BRepAdaptor_Curve | BRepAdaptor_CompCurve = self.geom_adaptor()
# GCPnts_UniformDeflection provides the best results but is limited
if curve.Continuity() in (GeomAbs_C2, GeomAbs_C3, GeomAbs_CN):
discretizer = GCPnts_UniformDeflection()
else:
discretizer = GCPnts_QuasiUniformDeflection()
discretizer.Initialize(
curve,
deflection,
curve.FirstParameter(),
curve.LastParameter(),
)
if not discretizer.IsDone() or discretizer.NbPoints() == 0:
raise RuntimeError("Deflection calculation failed")
return [
Vector(curve.Value(discretizer.Parameter(i + 1)))
for i in range(discretizer.NbPoints())
]
elif distances is not None:
return [self.position_at(d, position_mode) for d in distances]
else:
raise ValueError("Either distances or deflection must be provided")
def project( def project(
self, face: Face, direction: VectorLike, closest: bool = True self, face: Face, direction: VectorLike, closest: bool = True