def draw_elliptic_arc_entity(self, entity: DXFGraphic,
properties: Properties) -> None:
dxftype = entity.dxftype()
if NULLVEC.isclose(entity.dxf.extrusion):
self.skip_entity(
f'Invalid extrusion (0, 0, 0) in entity: {str(entity)}')
return
if dxftype == 'CIRCLE':
if entity.dxf.radius <= 0:
self.skip_entity(f'Invalid radius in entity: {str(entity)}')
return
path = Path.from_circle(cast('Circle', entity))
elif dxftype == 'ARC':
if entity.dxf.radius <= 0:
self.skip_entity(f'Invalid radius in entity: {str(entity)}')
return
path = Path.from_arc(cast('Arc', entity))
elif dxftype == 'ELLIPSE':
if NULLVEC.isclose(entity.dxf.major_axis):
self.skip_entity(
f'Invalid major axis (0, 0, 0) in entity: {str(entity)}')
return
path = Path.from_ellipse(cast('Ellipse', entity))
else: # API usage error
raise TypeError(dxftype)
self.out.draw_path(path, properties)
def test_end_points(ellipse):
p = Path.from_ellipse(ellipse)
assert ellipse.start_point.isclose(p.start)
assert ellipse.end_point.isclose(p.end)
# end point locations measured in BricsCAD:
assert ellipse.start_point.isclose((2191.3054, -1300.8375), abs_tol=1e-4)
assert ellipse.end_point.isclose((2609.7870, -1520.6677), abs_tol=1e-4)
def draw_elliptic_arc_entity(self, entity: DXFGraphic,
properties: Properties) -> None:
dxftype = entity.dxftype()
if dxftype == 'CIRCLE':
path = Path.from_circle(cast('Circle', entity))
elif dxftype == 'ARC':
path = Path.from_arc(cast('Arc', entity))
elif dxftype == 'ELLIPSE':
path = Path.from_ellipse(cast('Ellipse', entity))
else: # API usage error
raise TypeError(dxftype)
self.out.draw_path(path, properties)
# Copyright (c) 2020, Manfred Moitzi
# License: MIT License
import ezdxf
from ezdxf.render import Path
doc = ezdxf.new()
msp = doc.modelspace()
ellipse = msp.add_ellipse(
center=(1999.488177113287, -1598.02265357955, 0.0),
major_axis=(629.968069297, 0.0, 0.0),
ratio=0.495263197,
start_param=-1.261396328799999,
end_param=-0.2505454928,
dxfattribs={
'layer': "0",
'linetype': "Continuous",
'color': 3,
'extrusion': (0.0, 0.0, -1.0),
},
)
p = Path.from_ellipse(ellipse)
msp.add_lwpolyline(p.approximate(),
dxfattribs={
'layer': 'PathRendering',
'color': 1,
})
doc.set_modelspace_vport(500, (2400, -1400))
doc.saveas('path_rendering.dxf')
