def lwpolyline():
pline = LWPolyline.new(dxfattribs={
"elevation": 4,
"extrusion": (0, 0, -1),
})
pline.set_points(POLYLINE_POINTS)
return pline
def to_lwpolylines(
paths: Iterable[Path],
*,
distance: float = MAX_DISTANCE,
segments: int = MIN_SEGMENTS,
extrusion: "Vertex" = Z_AXIS,
dxfattribs=None,
) -> Iterable[LWPolyline]:
"""Convert the given `paths` into :class:`~ezdxf.entities.LWPolyline`
entities.
The `extrusion` vector is applied to all paths, all vertices are projected
onto the plane normal to this extrusion vector. The default extrusion vector
is the WCS z-axis. The plane elevation is the distance from the WCS origin
to the start point of the first path.
Args:
paths: iterable of :class:`Path` objects
distance: maximum distance, see :meth:`Path.flattening`
segments: minimum segment count per Bézier curve
extrusion: extrusion vector for all paths
dxfattribs: additional DXF attribs
Returns:
iterable of :class:`~ezdxf.entities.LWPolyline` objects
.. versionadded:: 0.16
"""
if isinstance(paths, Path):
paths = [paths]
else:
paths = list(paths)
if len(paths) == 0:
return []
extrusion = Vec3(extrusion)
reference_point = paths[0].start
dxfattribs = dict(dxfattribs or {})
if not Z_AXIS.isclose(extrusion):
ocs, elevation = _get_ocs(extrusion, reference_point)
paths = tools.transform_paths_to_ocs(paths, ocs)
dxfattribs["elevation"] = elevation
dxfattribs["extrusion"] = extrusion
elif reference_point.z != 0:
dxfattribs["elevation"] = reference_point.z
for path in tools.single_paths(paths):
if len(path) > 0:
p = LWPolyline.new(dxfattribs=dxfattribs)
p.append_points(path.flattening(distance, segments), format="xy")
yield p
def lwpolyline1():
e = LWPolyline.new(dxfattribs={
"layer": "0",
"linetype": "Continuous",
"color": 0,
"flags": 0,
"const_width": 0.0,
"elevation": 2.999999999999999e99,
"extrusion": (0.0, 0.0, 1.0),
}, )
e.set_points([
(297888, 108770, 0.0, 0.0, 0.0512534542487669),
(297930, 108335, 0.0, 0.0, 0.0),
])
return e
def lwpolyline() -> LWPolyline:
# Issue 414 shows an error in the bounding box calculation for a closed
# LWPOLYLINE representing a filled circle (const_width=0.45) and an
# inverted extrusion (0, 0, -1).
#
# original data of the LWPOLYLINE:
# [
# (-43710.28841108403, 19138.631023711587, 0.0, 0.0, -1.0),
# (-43710.28841108403, 19139.079023711445, 0.0, 0.0, -1.0),
# ]
# simplified test data:
points = [(-10.0, 1.0, 0.0, 0.0, -1.0), (-10.0, 1.45, 0.0, 0.0, -1.0)]
pline = LWPolyline.new(dxfattribs={
"extrusion": (0, 0, -1),
"const_width": 0.45
})
pline.append_points(points)
pline.close()
return pline
