Arc¶
ARC (DXF Reference) center at location dxf.center
and radius of dxf.radius
from dxf.start_angle
to
dxf.end_angle
. ARC goes always from dxf.start_angle
to dxf.end_angle
in counter clockwise
orientation around the dxf.extrusion
vector, which is (0, 0, 1)
by default and the usual case for 2D
arcs.
Subclass of | ezdxf.entities.Circle |
DXF type | 'ARC' |
Factory function | ezdxf.layouts.BaseLayout.add_arc() |
Inherited DXF attributes | Common graphical DXF attributes |
Warning
Do not instantiate entity classes by yourself - always use the provided factory functions!
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class
ezdxf.entities.
Arc
¶ -
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dxf.
radius
¶ Radius of arc (float)
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dxf.
start_angle
¶ Start angle in degrees (float)
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dxf.
end_angle
¶ End angle in degrees (float)
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start_point
¶ Returns the start point of the arc in WCS, takes OCS into account.
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end_point
¶ Returns the end point of the arc in WCS, takes OCS into account.
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angles
(num: int) → Iterable[float]¶ Returns num angles from start- to end angle in degrees in counter clockwise order.
All angles are normalized in the range from [0, 360).
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flattening
(sagitta: float) → Iterator[ezdxf.math._vector.Vec3]¶ Approximate the arc by vertices in WCS, argument segment is the max. distance from the center of an arc segment to the center of its chord.
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transform
(m: ezdxf.math._matrix44.Matrix44) → ezdxf.entities.arc.Arc¶ Transform ARC entity by transformation matrix m inplace.
Raises
NonUniformScalingError()
for non uniform scaling.
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to_ellipse
(replace=True) → Ellipse¶ Convert CIRCLE/ARC to an
Ellipse
entity.Adds the new ELLIPSE entity to the entity database and to the same layout as the source entity.
Parameters: replace – replace (delete) source entity by ELLIPSE entity if True
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to_spline
(replace=True) → Spline¶ Convert CIRCLE/ARC to a
Spline
entity.Adds the new SPLINE entity to the entity database and to the same layout as the source entity.
Parameters: replace – replace (delete) source entity by SPLINE entity if True
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construction_tool
() → ezdxf.math.arc.ConstructionArc¶ Returns 2D construction tool
ezdxf.math.ConstructionArc
, ignoring the extrusion vector.
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apply_construction_tool
(arc: ezdxf.math.arc.ConstructionArc) → ezdxf.entities.arc.Arc¶ Set ARC data from construction tool
ezdxf.math.ConstructionArc
, will not change the extrusion vector.
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